Analysis

  • max time kernel
    41s
  • max time network
    130s
  • platform
    ubuntu-18.04_amd64
  • resource
    ubuntu1804-amd64-20260513-en
  • resource tags

    arch:amd64arch:i386image:ubuntu1804-amd64-20260513-enkernel:4.15.0-213-genericlocale:en-usos:ubuntu-18.04-amd64system
  • submitted
    18/07/2026, 09:24

General

  • Target
    pty4.elf
  • Size 43KB
  • Sample260718-ldbhasat6x
  • SHA256 a2d67291d87fe8f4d6e92fdb45c0190fb372cdd2c83ccc9ab8fb81bf69c74588
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: Kaiten,Tsunami

    Linux-based IoT botnet which is controlled through IRC and normally used to carry out DDoS attacks.

  • Detects Kaiten/Tsunami Payload 1 IoCs
  • Creates/modifies Cron job 1 TTPs 5 IoCs

    Cron allows running tasks on a schedule, and is commonly used for malware persistence.

  • Enumerates running processes

    Discovers information about currently running processes on the system

  • Indicator Removal: Timestomp 1 TTPs 10 IoCs

    Adversaries may remove indicators of compromise from the host to evade detection.

  • UPX packed file 1 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Changes its process name 1 IoCs
  • Reads runtime system information 64 IoCs

    Reads data from /proc virtual filesystem.

  • Writes file to shm directory 1 IoCs

    Malware can drop malicious files in the shm directory which will run directly from RAM.

  • Writes file to tmp directory 1 IoCs

    Malware often drops required files in the /tmp directory.

Processes

  • /tmp/pty4.elf
    /tmp/pty4.elf
    1⤵
    • Changes its process name
    • Writes file to tmp directory
    PID:1497
    • /bin/sh
      sh -c "pidof -x strace > /dev/null"
      2⤵
        PID:1498
        • /bin/pidof
          pidof -x strace
          3⤵
          • Reads runtime system information
          PID:1499
      • /bin/sh
        sh -c "pidof -x tcpdump > /dev/null"
        2⤵
          PID:1502
          • /bin/pidof
            pidof -x tcpdump
            3⤵
            • Reads runtime system information
            PID:1503
        • /bin/sh
          sh -c "cat /etc/inittab | grep -v \"/tmp/pty4.elf\" > /etc/inittab2"
          2⤵
            PID:1507
            • /bin/cat
              cat /etc/inittab
              3⤵
                PID:1510
              • /bin/grep
                grep -v /tmp/pty4.elf
                3⤵
                  PID:1511
              • /bin/sh
                sh -c "crontab -l | grep /tmp/pty4.elf | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /tmp/pty4.elf > /dev/null 2>&1 &\") | crontab -"
                2⤵
                  PID:1508
                  • /bin/grep
                    grep -v "no cron"
                    3⤵
                      PID:1514
                    • /bin/grep
                      grep /tmp/pty4.elf
                      3⤵
                        PID:1513
                      • /usr/bin/crontab
                        crontab -l
                        3⤵
                          PID:1512
                        • /usr/bin/crontab
                          crontab -
                          3⤵
                          • Creates/modifies Cron job
                          PID:1518
                        • /usr/bin/crontab
                          crontab -l
                          3⤵
                            PID:1520
                        • /bin/sh
                          sh -c "crontab -r"
                          2⤵
                            PID:1509
                            • /usr/bin/crontab
                              crontab -r
                              3⤵
                                PID:1515
                            • /bin/sh
                              sh -c "echo \"0:2345:respawn:/tmp/pty4.elf\" >> /etc/inittab2"
                              2⤵
                                PID:1516
                              • /bin/sh
                                sh -c "cat /etc/inittab2 > /etc/inittab"
                                2⤵
                                  PID:1519
                                  • /bin/cat
                                    cat /etc/inittab2
                                    3⤵
                                      PID:1521
                                  • /bin/sh
                                    sh -c "rm -rf /etc/inittab2"
                                    2⤵
                                      PID:1522
                                      • /bin/rm
                                        rm -rf /etc/inittab2
                                        3⤵
                                          PID:1523
                                      • /bin/sh
                                        sh -c "touch -acmr /bin/ls /etc/inittab"
                                        2⤵
                                        • Indicator Removal: Timestomp
                                        PID:1524
                                        • /usr/bin/touch
                                          touch -acmr /bin/ls /etc/inittab
                                          3⤵
                                          • Indicator Removal: Timestomp
                                          PID:1525
                                      • /bin/sh
                                        sh -c "/bin/uname -n"
                                        2⤵
                                          PID:1529
                                          • /bin/uname
                                            /bin/uname -n
                                            3⤵
                                              PID:1531
                                          • /bin/sh
                                            sh -c "cp -f /tmp/pty4.elf /dev/shm/pty4.elf"
                                            2⤵
                                              PID:1530
                                              • /bin/cp
                                                cp -f /tmp/pty4.elf /dev/shm/pty4.elf
                                                3⤵
                                                • Writes file to shm directory
                                                PID:1532
                                            • /bin/sh
                                              sh -c "cat /etc/inittab | grep -v \"/dev/shm/pty4.elf\" > /etc/inittab2"
                                              2⤵
                                                PID:1537
                                                • /bin/grep
                                                  grep -v /dev/shm/pty4.elf
                                                  3⤵
                                                    PID:1540
                                                  • /bin/cat
                                                    cat /etc/inittab
                                                    3⤵
                                                      PID:1539
                                                  • /bin/sh
                                                    sh -c "crontab -l | grep /dev/shm/pty4.elf | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /dev/shm/pty4.elf > /dev/null 2>&1 &\") | crontab -"
                                                    2⤵
                                                      PID:1538
                                                      • /bin/grep
                                                        grep -v "no cron"
                                                        3⤵
                                                          PID:1543
                                                        • /usr/bin/crontab
                                                          crontab -l
                                                          3⤵
                                                            PID:1541
                                                          • /bin/grep
                                                            grep /dev/shm/pty4.elf
                                                            3⤵
                                                              PID:1542
                                                            • /usr/bin/crontab
                                                              crontab -
                                                              3⤵
                                                              • Creates/modifies Cron job
                                                              PID:1547
                                                            • /usr/bin/crontab
                                                              crontab -l
                                                              3⤵
                                                                PID:1549
                                                            • /bin/sh
                                                              sh -c "echo \"0:2345:respawn:/dev/shm/pty4.elf\" >> /etc/inittab2"
                                                              2⤵
                                                                PID:1544
                                                              • /bin/sh
                                                                sh -c "cat /etc/inittab2 > /etc/inittab"
                                                                2⤵
                                                                  PID:1545
                                                                  • /bin/cat
                                                                    cat /etc/inittab2
                                                                    3⤵
                                                                      PID:1548
                                                                  • /bin/sh
                                                                    sh -c "rm -rf /etc/inittab2"
                                                                    2⤵
                                                                      PID:1550
                                                                      • /bin/rm
                                                                        rm -rf /etc/inittab2
                                                                        3⤵
                                                                          PID:1551
                                                                      • /bin/sh
                                                                        sh -c "touch -acmr /bin/ls /etc/inittab"
                                                                        2⤵
                                                                        • Indicator Removal: Timestomp
                                                                        PID:1552
                                                                        • /usr/bin/touch
                                                                          touch -acmr /bin/ls /etc/inittab
                                                                          3⤵
                                                                          • Indicator Removal: Timestomp
                                                                          PID:1553
                                                                      • /bin/sh
                                                                        sh -c "cp -f /tmp/pty4.elf /var/tmp/pty4.elf"
                                                                        2⤵
                                                                          PID:1554
                                                                          • /bin/cp
                                                                            cp -f /tmp/pty4.elf /var/tmp/pty4.elf
                                                                            3⤵
                                                                              PID:1555
                                                                          • /bin/sh
                                                                            sh -c "cat /etc/inittab | grep -v \"/var/tmp/pty4.elf\" > /etc/inittab2"
                                                                            2⤵
                                                                              PID:1557
                                                                              • /bin/cat
                                                                                cat /etc/inittab
                                                                                3⤵
                                                                                  PID:1559
                                                                                • /bin/grep
                                                                                  grep -v /var/tmp/pty4.elf
                                                                                  3⤵
                                                                                    PID:1560
                                                                                • /bin/sh
                                                                                  sh -c "crontab -l | grep /var/tmp/pty4.elf | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /var/tmp/pty4.elf > /dev/null 2>&1 &\") | crontab -"
                                                                                  2⤵
                                                                                    PID:1558
                                                                                    • /bin/grep
                                                                                      grep -v "no cron"
                                                                                      3⤵
                                                                                        PID:1563
                                                                                      • /bin/grep
                                                                                        grep /var/tmp/pty4.elf
                                                                                        3⤵
                                                                                          PID:1562
                                                                                        • /usr/bin/crontab
                                                                                          crontab -l
                                                                                          3⤵
                                                                                            PID:1561
                                                                                          • /usr/bin/crontab
                                                                                            crontab -
                                                                                            3⤵
                                                                                            • Creates/modifies Cron job
                                                                                            PID:1567
                                                                                          • /usr/bin/crontab
                                                                                            crontab -l
                                                                                            3⤵
                                                                                              PID:1569
                                                                                          • /bin/sh
                                                                                            sh -c "echo \"0:2345:respawn:/var/tmp/pty4.elf\" >> /etc/inittab2"
                                                                                            2⤵
                                                                                              PID:1564
                                                                                            • /bin/sh
                                                                                              sh -c "cat /etc/inittab2 > /etc/inittab"
                                                                                              2⤵
                                                                                                PID:1565
                                                                                                • /bin/cat
                                                                                                  cat /etc/inittab2
                                                                                                  3⤵
                                                                                                    PID:1568
                                                                                                • /bin/sh
                                                                                                  sh -c "rm -rf /etc/inittab2"
                                                                                                  2⤵
                                                                                                    PID:1570
                                                                                                    • /bin/rm
                                                                                                      rm -rf /etc/inittab2
                                                                                                      3⤵
                                                                                                        PID:1571
                                                                                                    • /bin/sh
                                                                                                      sh -c "touch -acmr /bin/ls /etc/inittab"
                                                                                                      2⤵
                                                                                                      • Indicator Removal: Timestomp
                                                                                                      PID:1572
                                                                                                      • /usr/bin/touch
                                                                                                        touch -acmr /bin/ls /etc/inittab
                                                                                                        3⤵
                                                                                                        • Indicator Removal: Timestomp
                                                                                                        PID:1573
                                                                                                    • /bin/sh
                                                                                                      sh -c "cp -f /tmp/pty4.elf /var/lock/pty4.elf"
                                                                                                      2⤵
                                                                                                        PID:1574
                                                                                                        • /bin/cp
                                                                                                          cp -f /tmp/pty4.elf /var/lock/pty4.elf
                                                                                                          3⤵
                                                                                                            PID:1575
                                                                                                        • /bin/sh
                                                                                                          sh -c "cat /etc/inittab | grep -v \"/var/lock/pty4.elf\" > /etc/inittab2"
                                                                                                          2⤵
                                                                                                            PID:1577
                                                                                                            • /bin/grep
                                                                                                              grep -v /var/lock/pty4.elf
                                                                                                              3⤵
                                                                                                                PID:1580
                                                                                                              • /bin/cat
                                                                                                                cat /etc/inittab
                                                                                                                3⤵
                                                                                                                  PID:1579
                                                                                                              • /bin/sh
                                                                                                                sh -c "crontab -l | grep /var/lock/pty4.elf | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /var/lock/pty4.elf > /dev/null 2>&1 &\") | crontab -"
                                                                                                                2⤵
                                                                                                                  PID:1578
                                                                                                                  • /bin/grep
                                                                                                                    grep -v "no cron"
                                                                                                                    3⤵
                                                                                                                      PID:1583
                                                                                                                    • /bin/grep
                                                                                                                      grep /var/lock/pty4.elf
                                                                                                                      3⤵
                                                                                                                        PID:1582
                                                                                                                      • /usr/bin/crontab
                                                                                                                        crontab -l
                                                                                                                        3⤵
                                                                                                                          PID:1581
                                                                                                                        • /usr/bin/crontab
                                                                                                                          crontab -
                                                                                                                          3⤵
                                                                                                                          • Creates/modifies Cron job
                                                                                                                          PID:1587
                                                                                                                        • /usr/bin/crontab
                                                                                                                          crontab -l
                                                                                                                          3⤵
                                                                                                                            PID:1589
                                                                                                                        • /bin/sh
                                                                                                                          sh -c "echo \"0:2345:respawn:/var/lock/pty4.elf\" >> /etc/inittab2"
                                                                                                                          2⤵
                                                                                                                            PID:1584
                                                                                                                          • /bin/sh
                                                                                                                            sh -c "cat /etc/inittab2 > /etc/inittab"
                                                                                                                            2⤵
                                                                                                                              PID:1585
                                                                                                                              • /bin/cat
                                                                                                                                cat /etc/inittab2
                                                                                                                                3⤵
                                                                                                                                  PID:1588
                                                                                                                              • /bin/sh
                                                                                                                                sh -c "rm -rf /etc/inittab2"
                                                                                                                                2⤵
                                                                                                                                  PID:1590
                                                                                                                                  • /bin/rm
                                                                                                                                    rm -rf /etc/inittab2
                                                                                                                                    3⤵
                                                                                                                                      PID:1591
                                                                                                                                  • /bin/sh
                                                                                                                                    sh -c "touch -acmr /bin/ls /etc/inittab"
                                                                                                                                    2⤵
                                                                                                                                    • Indicator Removal: Timestomp
                                                                                                                                    PID:1592
                                                                                                                                    • /usr/bin/touch
                                                                                                                                      touch -acmr /bin/ls /etc/inittab
                                                                                                                                      3⤵
                                                                                                                                      • Indicator Removal: Timestomp
                                                                                                                                      PID:1593
                                                                                                                                  • /bin/sh
                                                                                                                                    sh -c "cp -f /tmp/pty4.elf /var/run/pty4.elf"
                                                                                                                                    2⤵
                                                                                                                                      PID:1594
                                                                                                                                      • /bin/cp
                                                                                                                                        cp -f /tmp/pty4.elf /var/run/pty4.elf
                                                                                                                                        3⤵
                                                                                                                                        • Reads runtime system information
                                                                                                                                        PID:1595
                                                                                                                                    • /bin/sh
                                                                                                                                      sh -c "cat /etc/inittab | grep -v \"/var/run/pty4.elf\" > /etc/inittab2"
                                                                                                                                      2⤵
                                                                                                                                        PID:1597
                                                                                                                                        • /bin/grep
                                                                                                                                          grep -v /var/run/pty4.elf
                                                                                                                                          3⤵
                                                                                                                                            PID:1600
                                                                                                                                          • /bin/cat
                                                                                                                                            cat /etc/inittab
                                                                                                                                            3⤵
                                                                                                                                              PID:1599
                                                                                                                                          • /bin/sh
                                                                                                                                            sh -c "crontab -l | grep /var/run/pty4.elf | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /var/run/pty4.elf > /dev/null 2>&1 &\") | crontab -"
                                                                                                                                            2⤵
                                                                                                                                              PID:1598
                                                                                                                                              • /bin/grep
                                                                                                                                                grep /var/run/pty4.elf
                                                                                                                                                3⤵
                                                                                                                                                  PID:1602
                                                                                                                                                • /usr/bin/crontab
                                                                                                                                                  crontab -l
                                                                                                                                                  3⤵
                                                                                                                                                    PID:1601
                                                                                                                                                  • /bin/grep
                                                                                                                                                    grep -v "no cron"
                                                                                                                                                    3⤵
                                                                                                                                                      PID:1603
                                                                                                                                                    • /usr/bin/crontab
                                                                                                                                                      crontab -
                                                                                                                                                      3⤵
                                                                                                                                                      • Creates/modifies Cron job
                                                                                                                                                      PID:1607
                                                                                                                                                    • /usr/bin/crontab
                                                                                                                                                      crontab -l
                                                                                                                                                      3⤵
                                                                                                                                                        PID:1609
                                                                                                                                                    • /bin/sh
                                                                                                                                                      sh -c "echo \"0:2345:respawn:/var/run/pty4.elf\" >> /etc/inittab2"
                                                                                                                                                      2⤵
                                                                                                                                                        PID:1604
                                                                                                                                                      • /bin/sh
                                                                                                                                                        sh -c "cat /etc/inittab2 > /etc/inittab"
                                                                                                                                                        2⤵
                                                                                                                                                          PID:1605
                                                                                                                                                          • /bin/cat
                                                                                                                                                            cat /etc/inittab2
                                                                                                                                                            3⤵
                                                                                                                                                              PID:1608
                                                                                                                                                          • /bin/sh
                                                                                                                                                            sh -c "rm -rf /etc/inittab2"
                                                                                                                                                            2⤵
                                                                                                                                                              PID:1610
                                                                                                                                                              • /bin/rm
                                                                                                                                                                rm -rf /etc/inittab2
                                                                                                                                                                3⤵
                                                                                                                                                                  PID:1611
                                                                                                                                                              • /bin/sh
                                                                                                                                                                sh -c "touch -acmr /bin/ls /etc/inittab"
                                                                                                                                                                2⤵
                                                                                                                                                                • Indicator Removal: Timestomp
                                                                                                                                                                PID:1612
                                                                                                                                                                • /usr/bin/touch
                                                                                                                                                                  touch -acmr /bin/ls /etc/inittab
                                                                                                                                                                  3⤵
                                                                                                                                                                  • Indicator Removal: Timestomp
                                                                                                                                                                  PID:1613

                                                                                                                                                            Network

                                                                                                                                                                  MITRE ATT&CK Enterprise v16

                                                                                                                                                                  Replay Monitor

                                                                                                                                                                  Loading Replay Monitor...

                                                                                                                                                                  Downloads

                                                                                                                                                                  pty4.elf

                                                                                                                                                                  • Path /dev/shm/pty4.elf
                                                                                                                                                                  • Size 43KB
                                                                                                                                                                  • SHA256 a2d67291d87fe8f4d6e92fdb45c0190fb372cdd2c83ccc9ab8fb81bf69c74588
                                                                                                                                                                  • MD5 SHA1 SHA512 SSDEEP TLSH

                                                                                                                                                                  inittab

                                                                                                                                                                  • Path /etc/inittab
                                                                                                                                                                  • Size 95B
                                                                                                                                                                  • SHA256 c683a0dc9c890a730791f56cc6cf23a9e1127e17c34cdd9c2f761a6dec981d40
                                                                                                                                                                  • MD5 SHA1 SHA512 TLSH

                                                                                                                                                                  inittab

                                                                                                                                                                  • Path /etc/inittab
                                                                                                                                                                  • Size 129B
                                                                                                                                                                  • SHA256 daef80226647b002441550e4751c4ea036cdc9730c93f29ef850e2c92dafdec7
                                                                                                                                                                  • MD5 SHA1 SHA512 TLSH

                                                                                                                                                                  inittab2

                                                                                                                                                                  • Path /etc/inittab2
                                                                                                                                                                  • Size 62B
                                                                                                                                                                  • SHA256 f1333866e4314f61456b0b34e789cdf326bec31ba29f882d8b8df32ae9d158c8
                                                                                                                                                                  • MD5 SHA1 SHA512 TLSH

                                                                                                                                                                  inittab2

                                                                                                                                                                  • Path /etc/inittab2
                                                                                                                                                                  • Size 162B
                                                                                                                                                                  • SHA256 daba469c24ab3c3b88a34b60d06ca4b27a03d1cba0d965378f1dae554e104fcd
                                                                                                                                                                  • MD5 SHA1 SHA512 TLSH

                                                                                                                                                                  inittab2

                                                                                                                                                                  • Path /etc/inittab2
                                                                                                                                                                  • Size 29B
                                                                                                                                                                  • SHA256 7f70bb2da88382e9039619a680d78a45fdb99f8d64210188e40e05d7650245e2
                                                                                                                                                                  • MD5 SHA1 SHA512

                                                                                                                                                                  tmp.HKKuqt

                                                                                                                                                                  • Path /var/spool/cron/crontabs/tmp.HKKuqt
                                                                                                                                                                  • Size 312B
                                                                                                                                                                  • SHA256 2ad147a3578edb463236b6b8885e842f19c64f755398e72bc42bed7cd429bfa6
                                                                                                                                                                  • MD5 SHA1 SHA512 TLSH

                                                                                                                                                                  tmp.TJjnFy

                                                                                                                                                                  • Path /var/spool/cron/crontabs/tmp.TJjnFy
                                                                                                                                                                  • Size 360B
                                                                                                                                                                  • SHA256 71f475c730dbf9280cee4136adb54c69aaec5458743587ddf50ecf2bd0f2da51
                                                                                                                                                                  • MD5 SHA1 SHA512 TLSH

                                                                                                                                                                  tmp.Y11k1j

                                                                                                                                                                  • Path /var/spool/cron/crontabs/tmp.Y11k1j
                                                                                                                                                                  • Size 218B
                                                                                                                                                                  • SHA256 f723358824814aa590e1c12f1a9b2aec5feb44cd54ab73e343189a6a6f874e99
                                                                                                                                                                  • MD5 SHA1 SHA512 TLSH

                                                                                                                                                                  tmp.hyWjYr

                                                                                                                                                                  • Path /var/spool/cron/crontabs/tmp.hyWjYr
                                                                                                                                                                  • Size 265B
                                                                                                                                                                  • SHA256 fe12f11ae828f47f2cbf9dc1d0ef38d44b4423b172d2e522d53f42d3d03d3a5c
                                                                                                                                                                  • MD5 SHA1 SHA512 TLSH

                                                                                                                                                                  tmp.zdit4z

                                                                                                                                                                  • Path /var/spool/cron/crontabs/tmp.zdit4z
                                                                                                                                                                  • Size 407B
                                                                                                                                                                  • SHA256 512c015046fa47260237321da1ea86f4a26afc7b5593369416cba7a9f5979bbe
                                                                                                                                                                  • MD5 SHA1 SHA512 TLSH