Analysis

  • max time kernel
    46s
  • max time network
    129s
  • 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
    05/08/2026, 00:14

General

  • Target
    pty4
  • Size 43KB
  • Sample260805-ajg2gsteme
  • SHA256 3e16c3bc39182471cac0c89b9883bd102d23d4bb938eb648c7d88b8649e857a9
  • 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:1482
    • /bin/sh
      sh -c "pidof -x strace > /dev/null"
      2⤵
        PID:1483
        • /bin/pidof
          pidof -x strace
          3⤵
          • Reads runtime system information
          PID:1484
      • /bin/sh
        sh -c "pidof -x tcpdump > /dev/null"
        2⤵
          PID:1485
          • /bin/pidof
            pidof -x tcpdump
            3⤵
            • Reads runtime system information
            PID:1486
        • /bin/sh
          sh -c "cat /etc/inittab | grep -v \"/tmp/pty4\" > /etc/inittab2"
          2⤵
            PID:1489
            • /bin/cat
              cat /etc/inittab
              3⤵
                PID:1491
              • /bin/grep
                grep -v /tmp/pty4
                3⤵
                  PID:1492
              • /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:1490
                  • /bin/grep
                    grep -v "no cron"
                    3⤵
                      PID:1497
                    • /bin/grep
                      grep /tmp/pty4
                      3⤵
                        PID:1496
                      • /usr/bin/crontab
                        crontab -l
                        3⤵
                          PID:1494
                        • /usr/bin/crontab
                          crontab -
                          3⤵
                          • Creates/modifies Cron job
                          PID:1502
                        • /usr/bin/crontab
                          crontab -l
                          3⤵
                            PID:1504
                        • /bin/sh
                          sh -c "crontab -r"
                          2⤵
                            PID:1493
                            • /usr/bin/crontab
                              crontab -r
                              3⤵
                                PID:1495
                            • /bin/sh
                              sh -c "echo \"0:2345:respawn:/tmp/pty4\" >> /etc/inittab2"
                              2⤵
                                PID:1499
                              • /bin/sh
                                sh -c "cat /etc/inittab2 > /etc/inittab"
                                2⤵
                                  PID:1503
                                  • /bin/cat
                                    cat /etc/inittab2
                                    3⤵
                                      PID:1505
                                  • /bin/sh
                                    sh -c "rm -rf /etc/inittab2"
                                    2⤵
                                      PID:1506
                                      • /bin/rm
                                        rm -rf /etc/inittab2
                                        3⤵
                                          PID:1507
                                      • /bin/sh
                                        sh -c "touch -acmr /bin/ls /etc/inittab"
                                        2⤵
                                        • Indicator Removal: Timestomp
                                        PID:1508
                                        • /usr/bin/touch
                                          touch -acmr /bin/ls /etc/inittab
                                          3⤵
                                          • Indicator Removal: Timestomp
                                          PID:1509
                                      • /bin/sh
                                        sh -c "/bin/uname -n"
                                        2⤵
                                          PID:1513
                                          • /bin/uname
                                            /bin/uname -n
                                            3⤵
                                              PID:1515
                                          • /bin/sh
                                            sh -c "cp -f /tmp/pty4 /dev/shm/pty4"
                                            2⤵
                                              PID:1514
                                              • /bin/cp
                                                cp -f /tmp/pty4 /dev/shm/pty4
                                                3⤵
                                                • Writes file to shm directory
                                                PID:1516
                                            • /bin/sh
                                              sh -c "cat /etc/inittab | grep -v \"/dev/shm/pty4\" > /etc/inittab2"
                                              2⤵
                                                PID:1518
                                                • /bin/grep
                                                  grep -v /dev/shm/pty4
                                                  3⤵
                                                    PID:1521
                                                  • /bin/cat
                                                    cat /etc/inittab
                                                    3⤵
                                                      PID:1520
                                                  • /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:1519
                                                      • /bin/grep
                                                        grep -v "no cron"
                                                        3⤵
                                                          PID:1524
                                                        • /bin/grep
                                                          grep /dev/shm/pty4
                                                          3⤵
                                                            PID:1523
                                                          • /usr/bin/crontab
                                                            crontab -l
                                                            3⤵
                                                              PID:1522
                                                            • /usr/bin/crontab
                                                              crontab -
                                                              3⤵
                                                              • Creates/modifies Cron job
                                                              PID:1527
                                                            • /usr/bin/crontab
                                                              crontab -l
                                                              3⤵
                                                                PID:1529
                                                            • /bin/sh
                                                              sh -c "echo \"0:2345:respawn:/dev/shm/pty4\" >> /etc/inittab2"
                                                              2⤵
                                                                PID:1525
                                                              • /bin/sh
                                                                sh -c "cat /etc/inittab2 > /etc/inittab"
                                                                2⤵
                                                                  PID:1528
                                                                  • /bin/cat
                                                                    cat /etc/inittab2
                                                                    3⤵
                                                                      PID:1530
                                                                  • /bin/sh
                                                                    sh -c "rm -rf /etc/inittab2"
                                                                    2⤵
                                                                      PID:1531
                                                                      • /bin/rm
                                                                        rm -rf /etc/inittab2
                                                                        3⤵
                                                                          PID:1532
                                                                      • /bin/sh
                                                                        sh -c "touch -acmr /bin/ls /etc/inittab"
                                                                        2⤵
                                                                        • Indicator Removal: Timestomp
                                                                        PID:1533
                                                                        • /usr/bin/touch
                                                                          touch -acmr /bin/ls /etc/inittab
                                                                          3⤵
                                                                          • Indicator Removal: Timestomp
                                                                          PID:1534
                                                                      • /bin/sh
                                                                        sh -c "cp -f /tmp/pty4 /var/tmp/pty4"
                                                                        2⤵
                                                                          PID:1535
                                                                          • /bin/cp
                                                                            cp -f /tmp/pty4 /var/tmp/pty4
                                                                            3⤵
                                                                              PID:1537
                                                                          • /bin/sh
                                                                            sh -c "cat /etc/inittab | grep -v \"/var/tmp/pty4\" > /etc/inittab2"
                                                                            2⤵
                                                                              PID:1539
                                                                              • /bin/grep
                                                                                grep -v /var/tmp/pty4
                                                                                3⤵
                                                                                  PID:1541
                                                                                • /bin/cat
                                                                                  cat /etc/inittab
                                                                                  3⤵
                                                                                    PID:1540
                                                                                • /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:1542
                                                                                    • /bin/grep
                                                                                      grep -v "no cron"
                                                                                      3⤵
                                                                                        PID:1545
                                                                                      • /bin/grep
                                                                                        grep /var/tmp/pty4
                                                                                        3⤵
                                                                                          PID:1544
                                                                                        • /usr/bin/crontab
                                                                                          crontab -l
                                                                                          3⤵
                                                                                            PID:1543
                                                                                          • /usr/bin/crontab
                                                                                            crontab -
                                                                                            3⤵
                                                                                            • Creates/modifies Cron job
                                                                                            PID:1549
                                                                                          • /usr/bin/crontab
                                                                                            crontab -l
                                                                                            3⤵
                                                                                              PID:1551
                                                                                          • /bin/sh
                                                                                            sh -c "echo \"0:2345:respawn:/var/tmp/pty4\" >> /etc/inittab2"
                                                                                            2⤵
                                                                                              PID:1546
                                                                                            • /bin/sh
                                                                                              sh -c "cat /etc/inittab2 > /etc/inittab"
                                                                                              2⤵
                                                                                                PID:1547
                                                                                                • /bin/cat
                                                                                                  cat /etc/inittab2
                                                                                                  3⤵
                                                                                                    PID:1550
                                                                                                • /bin/sh
                                                                                                  sh -c "rm -rf /etc/inittab2"
                                                                                                  2⤵
                                                                                                    PID:1552
                                                                                                    • /bin/rm
                                                                                                      rm -rf /etc/inittab2
                                                                                                      3⤵
                                                                                                        PID:1553
                                                                                                    • /bin/sh
                                                                                                      sh -c "touch -acmr /bin/ls /etc/inittab"
                                                                                                      2⤵
                                                                                                      • Indicator Removal: Timestomp
                                                                                                      PID:1554
                                                                                                      • /usr/bin/touch
                                                                                                        touch -acmr /bin/ls /etc/inittab
                                                                                                        3⤵
                                                                                                        • Indicator Removal: Timestomp
                                                                                                        PID:1555
                                                                                                    • /bin/sh
                                                                                                      sh -c "cp -f /tmp/pty4 /var/lock/pty4"
                                                                                                      2⤵
                                                                                                        PID:1556
                                                                                                        • /bin/cp
                                                                                                          cp -f /tmp/pty4 /var/lock/pty4
                                                                                                          3⤵
                                                                                                            PID:1557
                                                                                                        • /bin/sh
                                                                                                          sh -c "cat /etc/inittab | grep -v \"/var/lock/pty4\" > /etc/inittab2"
                                                                                                          2⤵
                                                                                                            PID:1559
                                                                                                            • /bin/grep
                                                                                                              grep -v /var/lock/pty4
                                                                                                              3⤵
                                                                                                                PID:1561
                                                                                                              • /bin/cat
                                                                                                                cat /etc/inittab
                                                                                                                3⤵
                                                                                                                  PID:1560
                                                                                                              • /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:1562
                                                                                                                  • /bin/grep
                                                                                                                    grep -v "no cron"
                                                                                                                    3⤵
                                                                                                                      PID:1565
                                                                                                                    • /bin/grep
                                                                                                                      grep /var/lock/pty4
                                                                                                                      3⤵
                                                                                                                        PID:1564
                                                                                                                      • /usr/bin/crontab
                                                                                                                        crontab -l
                                                                                                                        3⤵
                                                                                                                          PID:1563
                                                                                                                        • /usr/bin/crontab
                                                                                                                          crontab -
                                                                                                                          3⤵
                                                                                                                          • Creates/modifies Cron job
                                                                                                                          PID:1569
                                                                                                                        • /usr/bin/crontab
                                                                                                                          crontab -l
                                                                                                                          3⤵
                                                                                                                            PID:1571
                                                                                                                        • /bin/sh
                                                                                                                          sh -c "echo \"0:2345:respawn:/var/lock/pty4\" >> /etc/inittab2"
                                                                                                                          2⤵
                                                                                                                            PID:1566
                                                                                                                          • /bin/sh
                                                                                                                            sh -c "cat /etc/inittab2 > /etc/inittab"
                                                                                                                            2⤵
                                                                                                                              PID:1567
                                                                                                                              • /bin/cat
                                                                                                                                cat /etc/inittab2
                                                                                                                                3⤵
                                                                                                                                  PID:1570
                                                                                                                              • /bin/sh
                                                                                                                                sh -c "rm -rf /etc/inittab2"
                                                                                                                                2⤵
                                                                                                                                  PID:1572
                                                                                                                                  • /bin/rm
                                                                                                                                    rm -rf /etc/inittab2
                                                                                                                                    3⤵
                                                                                                                                      PID:1573
                                                                                                                                  • /bin/sh
                                                                                                                                    sh -c "touch -acmr /bin/ls /etc/inittab"
                                                                                                                                    2⤵
                                                                                                                                    • Indicator Removal: Timestomp
                                                                                                                                    PID:1574
                                                                                                                                    • /usr/bin/touch
                                                                                                                                      touch -acmr /bin/ls /etc/inittab
                                                                                                                                      3⤵
                                                                                                                                      • Indicator Removal: Timestomp
                                                                                                                                      PID:1575
                                                                                                                                  • /bin/sh
                                                                                                                                    sh -c "cp -f /tmp/pty4 /var/run/pty4"
                                                                                                                                    2⤵
                                                                                                                                      PID:1576
                                                                                                                                      • /bin/cp
                                                                                                                                        cp -f /tmp/pty4 /var/run/pty4
                                                                                                                                        3⤵
                                                                                                                                          PID:1577
                                                                                                                                      • /bin/sh
                                                                                                                                        sh -c "cat /etc/inittab | grep -v \"/var/run/pty4\" > /etc/inittab2"
                                                                                                                                        2⤵
                                                                                                                                          PID:1579
                                                                                                                                          • /bin/grep
                                                                                                                                            grep -v /var/run/pty4
                                                                                                                                            3⤵
                                                                                                                                              PID:1582
                                                                                                                                            • /bin/cat
                                                                                                                                              cat /etc/inittab
                                                                                                                                              3⤵
                                                                                                                                                PID:1581
                                                                                                                                            • /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:1580
                                                                                                                                                • /bin/grep
                                                                                                                                                  grep -v "no cron"
                                                                                                                                                  3⤵
                                                                                                                                                    PID:1585
                                                                                                                                                  • /usr/bin/crontab
                                                                                                                                                    crontab -l
                                                                                                                                                    3⤵
                                                                                                                                                      PID:1583
                                                                                                                                                    • /bin/grep
                                                                                                                                                      grep /var/run/pty4
                                                                                                                                                      3⤵
                                                                                                                                                        PID:1584
                                                                                                                                                      • /usr/bin/crontab
                                                                                                                                                        crontab -
                                                                                                                                                        3⤵
                                                                                                                                                        • Creates/modifies Cron job
                                                                                                                                                        PID:1589
                                                                                                                                                      • /usr/bin/crontab
                                                                                                                                                        crontab -l
                                                                                                                                                        3⤵
                                                                                                                                                          PID:1591
                                                                                                                                                      • /bin/sh
                                                                                                                                                        sh -c "echo \"0:2345:respawn:/var/run/pty4\" >> /etc/inittab2"
                                                                                                                                                        2⤵
                                                                                                                                                          PID:1586
                                                                                                                                                        • /bin/sh
                                                                                                                                                          sh -c "cat /etc/inittab2 > /etc/inittab"
                                                                                                                                                          2⤵
                                                                                                                                                            PID:1587
                                                                                                                                                            • /bin/cat
                                                                                                                                                              cat /etc/inittab2
                                                                                                                                                              3⤵
                                                                                                                                                                PID:1590
                                                                                                                                                            • /bin/sh
                                                                                                                                                              sh -c "rm -rf /etc/inittab2"
                                                                                                                                                              2⤵
                                                                                                                                                                PID:1592
                                                                                                                                                                • /bin/rm
                                                                                                                                                                  rm -rf /etc/inittab2
                                                                                                                                                                  3⤵
                                                                                                                                                                    PID:1593
                                                                                                                                                                • /bin/sh
                                                                                                                                                                  sh -c "touch -acmr /bin/ls /etc/inittab"
                                                                                                                                                                  2⤵
                                                                                                                                                                  • Indicator Removal: Timestomp
                                                                                                                                                                  PID:1594
                                                                                                                                                                  • /usr/bin/touch
                                                                                                                                                                    touch -acmr /bin/ls /etc/inittab
                                                                                                                                                                    3⤵
                                                                                                                                                                    • Indicator Removal: Timestomp
                                                                                                                                                                    PID:1595

                                                                                                                                                              Network

                                                                                                                                                                    MITRE ATT&CK Enterprise v16

                                                                                                                                                                    Replay Monitor

                                                                                                                                                                    Loading Replay Monitor...

                                                                                                                                                                    Downloads

                                                                                                                                                                    pty4

                                                                                                                                                                    • Path /dev/shm/pty4
                                                                                                                                                                    • Size 43KB
                                                                                                                                                                    • SHA256 3e16c3bc39182471cac0c89b9883bd102d23d4bb938eb648c7d88b8649e857a9
                                                                                                                                                                    • 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.8bYfQ5

                                                                                                                                                                    • Path /var/spool/cron/crontabs/tmp.8bYfQ5
                                                                                                                                                                    • Size 300B
                                                                                                                                                                    • SHA256 320ea0f1b8e324d6227e3907afbf234a7ef8149497878b73a36656b21132bcc1
                                                                                                                                                                    • MD5 SHA1 SHA512 TLSH

                                                                                                                                                                    tmp.KO2qH7

                                                                                                                                                                    • Path /var/spool/cron/crontabs/tmp.KO2qH7
                                                                                                                                                                    • Size 344B
                                                                                                                                                                    • SHA256 0c93ca8e95ec536abcf3c8fe39657963356e18777d48989c77de55ff705d7381
                                                                                                                                                                    • MD5 SHA1 SHA512 TLSH

                                                                                                                                                                    tmp.WwcfAd

                                                                                                                                                                    • Path /var/spool/cron/crontabs/tmp.WwcfAd
                                                                                                                                                                    • Size 387B
                                                                                                                                                                    • SHA256 1d8e2a2adc5ea228d217f2cf879e6e14f08e7d5d7e6505196117b39919b89ddb
                                                                                                                                                                    • MD5 SHA1 SHA512 TLSH

                                                                                                                                                                    tmp.ktjcm3

                                                                                                                                                                    • Path /var/spool/cron/crontabs/tmp.ktjcm3
                                                                                                                                                                    • Size 257B
                                                                                                                                                                    • SHA256 8b8c58913cd3a94151e6a22f04037f7bfdb08bea1ee7fa4db91a23934d07dbc0
                                                                                                                                                                    • MD5 SHA1 SHA512 TLSH

                                                                                                                                                                    tmp.vvMloX

                                                                                                                                                                    • Path /var/spool/cron/crontabs/tmp.vvMloX
                                                                                                                                                                    • Size 214B
                                                                                                                                                                    • SHA256 ea52bff7ece3d403dd668eb9cb0915691577269c5f9e14ed704a04d03c9954a5
                                                                                                                                                                    • MD5 SHA1 SHA512 TLSH