Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    ubuntu-18.04_amd64
  • resource
    ubuntu1804-amd64-20240729-en
  • resource tags

    arch:amd64arch:i386image:ubuntu1804-amd64-20240729-enkernel:4.15.0-213-genericlocale:en-usos:ubuntu-18.04-amd64system
  • submitted
    31-10-2024 22:52

General

  • Target

    linux_386.elf

  • Size

    5.0MB

  • MD5

    248846ad88fdaccddece36b05811a576

  • SHA1

    2dac57a664c60e1dbe1b51bd75b74ab7980bff30

  • SHA256

    0c1c800bbbce56afc46ceccc33b8e703d6f43673c92c07a43d2e980d0e427bde

  • SHA512

    0923b7b888aa9e15cff490093f2b626ed864e11cd1b31dc6e52b633dc1a054e2eb211b96a033ecbe9455ce93469ffa625037125e20ad400e619188ab766e898e

  • SSDEEP

    49152:E33d0lGt6UHcFL7Rn2o03wiEhiDmzzd/9sARlBs/00Cpfx9a9uNNp9hW16klbU6V:E33GlbU8FwmzzRDZ9maqRV

Malware Config

Extracted

Family

kaiji

C2

78789.dns.army:808

Signatures

  • Kaiji 1 IoCs

    Kaiji payload

  • Kaiji family
  • kaiji_chaosbot 1 IoCs

    Chaos-variant payload

  • Executes dropped EXE 7 IoCs
  • Modifies Watchdog functionality 1 TTPs 2 IoCs

    Malware like Mirai modifies the Watchdog to prevent it restarting an infected system.

  • Creates/modifies Cron job 1 TTPs 1 IoCs

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

  • Creates/modifies environment variables 1 TTPs 3 IoCs

    Creating/modifying environment variables is a common persistence mechanism.

  • Enumerates running processes

    Discovers information about currently running processes on the system

  • Modifies init.d 2 TTPs 2 IoCs

    Adds/modifies system service, likely for persistence.

  • Write file to user bin folder 2 IoCs
  • Modifies Bash startup script 2 TTPs 3 IoCs
  • Changes its process name 1 IoCs
  • Reads CPU attributes 1 TTPs 2 IoCs
  • Enumerates kernel/hardware configuration 1 TTPs 6 IoCs

    Reads contents of /sys virtual filesystem to enumerate system information.

  • Reads runtime system information 64 IoCs

    Reads data from /proc virtual filesystem.

  • GoLang User-Agent 1 IoCs

    Uses default user-agent string defined by GoLang HTTP packages.

Processes

  • /tmp/linux_386.elf
    /tmp/linux_386.elf
    1⤵
    • Enumerates kernel/hardware configuration
    PID:1552
    • /bin/sh
      sh -c "/etc/32678&"
      2⤵
        PID:1556
      • /usr/sbin/service
        service crond start
        2⤵
          PID:1557
          • /usr/bin/basename
            basename /usr/sbin/service
            3⤵
              PID:1560
            • /usr/bin/basename
              basename /usr/sbin/service
              3⤵
                PID:1569
              • /bin/systemctl
                systemctl --quiet is-active multi-user.target
                3⤵
                  PID:1573
                • /bin/sed
                  sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                  3⤵
                    PID:1580
                  • /bin/systemctl
                    systemctl list-unit-files --full "--type=socket"
                    3⤵
                    • Reads runtime system information
                    PID:1576
                • /tmp/linux_386.elf
                  /tmp/linux_386.elf " "
                  2⤵
                  • Modifies Watchdog functionality
                  • Creates/modifies environment variables
                  • Modifies init.d
                  • Write file to user bin folder
                  • Modifies Bash startup script
                  • Changes its process name
                  • Enumerates kernel/hardware configuration
                  • Reads runtime system information
                  PID:1559
                  • /usr/sbin/update-rc.d
                    update-rc.d linux_kill defaults
                    3⤵
                      PID:1574
                      • /usr/local/sbin/systemctl
                        systemctl daemon-reload
                        4⤵
                          PID:1587
                        • /usr/local/bin/systemctl
                          systemctl daemon-reload
                          4⤵
                            PID:1587
                          • /usr/sbin/systemctl
                            systemctl daemon-reload
                            4⤵
                              PID:1587
                            • /usr/bin/systemctl
                              systemctl daemon-reload
                              4⤵
                                PID:1587
                              • /sbin/systemctl
                                systemctl daemon-reload
                                4⤵
                                  PID:1587
                                • /bin/systemctl
                                  systemctl daemon-reload
                                  4⤵
                                  • Reads runtime system information
                                  PID:1587
                              • /bin/bash
                                bash -c "echo \"*/1 * * * * root /.img \" >> /etc/crontab"
                                3⤵
                                • Creates/modifies Cron job
                                PID:1591
                              • /usr/bin/renice
                                renice -20 1559
                                3⤵
                                  PID:1592
                                • /bin/mount
                                  mount -o bind /tmp/ /proc/1559
                                  3⤵
                                    PID:1593
                                  • /usr/sbin/service
                                    service cron start
                                    3⤵
                                      PID:1595
                                      • /usr/bin/basename
                                        basename /usr/sbin/service
                                        4⤵
                                          PID:1596
                                        • /usr/bin/basename
                                          basename /usr/sbin/service
                                          4⤵
                                            PID:1597
                                          • /bin/systemctl
                                            systemctl --quiet is-active multi-user.target
                                            4⤵
                                              PID:1598
                                            • /bin/sed
                                              sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                                              4⤵
                                                PID:1601
                                              • /bin/systemctl
                                                systemctl list-unit-files --full "--type=socket"
                                                4⤵
                                                  PID:1600
                                              • /usr/local/sbin/systemctl
                                                systemctl "--job-mode=ignore-dependencies" start cron.service
                                                3⤵
                                                  PID:1595
                                                • /usr/local/bin/systemctl
                                                  systemctl "--job-mode=ignore-dependencies" start cron.service
                                                  3⤵
                                                    PID:1595
                                                  • /usr/sbin/systemctl
                                                    systemctl "--job-mode=ignore-dependencies" start cron.service
                                                    3⤵
                                                      PID:1595
                                                    • /usr/bin/systemctl
                                                      systemctl "--job-mode=ignore-dependencies" start cron.service
                                                      3⤵
                                                        PID:1595
                                                      • /sbin/systemctl
                                                        systemctl "--job-mode=ignore-dependencies" start cron.service
                                                        3⤵
                                                          PID:1595
                                                        • /bin/systemctl
                                                          systemctl "--job-mode=ignore-dependencies" start cron.service
                                                          3⤵
                                                          • Reads runtime system information
                                                          PID:1595
                                                        • /bin/systemctl
                                                          systemctl start crond.service
                                                          3⤵
                                                          • Reads runtime system information
                                                          PID:1608
                                                    • /etc/32678
                                                      /etc/32678
                                                      1⤵
                                                      • Executes dropped EXE
                                                      PID:1558
                                                      • /bin/sleep
                                                        sleep 60
                                                        2⤵
                                                          PID:1564
                                                        • /etc/id.services.conf
                                                          /etc/id.services.conf
                                                          2⤵
                                                          • Executes dropped EXE
                                                          • Enumerates kernel/hardware configuration
                                                          PID:1620
                                                          • /usr/bin/pkill
                                                            pkill -9 32678
                                                            3⤵
                                                            • Reads CPU attributes
                                                            • Reads runtime system information
                                                            PID:1624
                                                          • /bin/sh
                                                            sh -c "/etc/32678&"
                                                            3⤵
                                                              PID:1625
                                                            • /usr/sbin/service
                                                              service crond start
                                                              3⤵
                                                                PID:1626
                                                                • /usr/bin/basename
                                                                  basename /usr/sbin/service
                                                                  4⤵
                                                                    PID:1629
                                                                  • /usr/bin/basename
                                                                    basename /usr/sbin/service
                                                                    4⤵
                                                                      PID:1631
                                                                    • /bin/systemctl
                                                                      systemctl --quiet is-active multi-user.target
                                                                      4⤵
                                                                      • Reads runtime system information
                                                                      PID:1634
                                                                    • /bin/sed
                                                                      sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                                                                      4⤵
                                                                        PID:1638
                                                                      • /bin/systemctl
                                                                        systemctl list-unit-files --full "--type=socket"
                                                                        4⤵
                                                                          PID:1637
                                                                      • /etc/id.services.conf
                                                                        /etc/id.services.conf " "
                                                                        3⤵
                                                                        • Executes dropped EXE
                                                                        • Enumerates kernel/hardware configuration
                                                                        PID:1628
                                                                  • /usr/local/sbin/systemctl
                                                                    systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                    1⤵
                                                                      PID:1557
                                                                    • /usr/local/bin/systemctl
                                                                      systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                      1⤵
                                                                        PID:1557
                                                                      • /usr/sbin/systemctl
                                                                        systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                        1⤵
                                                                          PID:1557
                                                                        • /usr/bin/systemctl
                                                                          systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                          1⤵
                                                                            PID:1557
                                                                          • /sbin/systemctl
                                                                            systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                            1⤵
                                                                              PID:1557
                                                                            • /bin/systemctl
                                                                              systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                              1⤵
                                                                              • Reads runtime system information
                                                                              PID:1557
                                                                            • /etc/32678
                                                                              /etc/32678
                                                                              1⤵
                                                                              • Executes dropped EXE
                                                                              PID:1627
                                                                              • /bin/sleep
                                                                                sleep 60
                                                                                2⤵
                                                                                  PID:1630
                                                                                • /etc/id.services.conf
                                                                                  /etc/id.services.conf
                                                                                  2⤵
                                                                                  • Executes dropped EXE
                                                                                  • Enumerates kernel/hardware configuration
                                                                                  PID:1656
                                                                                  • /usr/bin/pkill
                                                                                    pkill -9 32678
                                                                                    3⤵
                                                                                    • Reads CPU attributes
                                                                                    • Reads runtime system information
                                                                                    PID:1660
                                                                                  • /bin/sh
                                                                                    sh -c "/etc/32678&"
                                                                                    3⤵
                                                                                      PID:1661
                                                                                    • /usr/sbin/service
                                                                                      service crond start
                                                                                      3⤵
                                                                                        PID:1662
                                                                                        • /usr/bin/basename
                                                                                          basename /usr/sbin/service
                                                                                          4⤵
                                                                                            PID:1665
                                                                                          • /usr/bin/basename
                                                                                            basename /usr/sbin/service
                                                                                            4⤵
                                                                                              PID:1667
                                                                                            • /bin/systemctl
                                                                                              systemctl --quiet is-active multi-user.target
                                                                                              4⤵
                                                                                                PID:1670
                                                                                              • /bin/sed
                                                                                                sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                                                                                                4⤵
                                                                                                  PID:1674
                                                                                                • /bin/systemctl
                                                                                                  systemctl list-unit-files --full "--type=socket"
                                                                                                  4⤵
                                                                                                    PID:1673
                                                                                                • /etc/id.services.conf
                                                                                                  /etc/id.services.conf " "
                                                                                                  3⤵
                                                                                                  • Executes dropped EXE
                                                                                                  • Enumerates kernel/hardware configuration
                                                                                                  PID:1664
                                                                                            • /usr/local/sbin/systemctl
                                                                                              systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                              1⤵
                                                                                                PID:1626
                                                                                              • /usr/local/bin/systemctl
                                                                                                systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                1⤵
                                                                                                  PID:1626
                                                                                                • /usr/sbin/systemctl
                                                                                                  systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                  1⤵
                                                                                                    PID:1626
                                                                                                  • /usr/bin/systemctl
                                                                                                    systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                    1⤵
                                                                                                      PID:1626
                                                                                                    • /sbin/systemctl
                                                                                                      systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                      1⤵
                                                                                                        PID:1626
                                                                                                      • /bin/systemctl
                                                                                                        systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                        1⤵
                                                                                                        • Reads runtime system information
                                                                                                        PID:1626
                                                                                                      • /etc/32678
                                                                                                        /etc/32678
                                                                                                        1⤵
                                                                                                        • Executes dropped EXE
                                                                                                        PID:1663
                                                                                                        • /bin/sleep
                                                                                                          sleep 60
                                                                                                          2⤵
                                                                                                            PID:1666
                                                                                                        • /usr/local/sbin/systemctl
                                                                                                          systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                          1⤵
                                                                                                            PID:1662
                                                                                                          • /usr/local/bin/systemctl
                                                                                                            systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                            1⤵
                                                                                                              PID:1662
                                                                                                            • /usr/sbin/systemctl
                                                                                                              systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                              1⤵
                                                                                                                PID:1662
                                                                                                              • /usr/bin/systemctl
                                                                                                                systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                                1⤵
                                                                                                                  PID:1662
                                                                                                                • /sbin/systemctl
                                                                                                                  systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                                  1⤵
                                                                                                                    PID:1662
                                                                                                                  • /bin/systemctl
                                                                                                                    systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                                    1⤵
                                                                                                                    • Reads runtime system information
                                                                                                                    PID:1662

                                                                                                                  Network

                                                                                                                  MITRE ATT&CK Enterprise v15

                                                                                                                  Replay Monitor

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                                                                                                                  Downloads

                                                                                                                  • /.img

                                                                                                                    Filesize

                                                                                                                    33B

                                                                                                                    MD5

                                                                                                                    d73d3376908ea075a939e3871ad0fabe

                                                                                                                    SHA1

                                                                                                                    320ff65831247ba199515f1b94df26cc8a3e5f76

                                                                                                                    SHA256

                                                                                                                    edbdabe30d8236a2c0a4eb89dfd597552130e4c1a4e93f8fe1568920442ad73a

                                                                                                                    SHA512

                                                                                                                    57b83fef88620598beb5d65626bf757d0abef242d2d6a01796a61474dedc5095a4a9d0f292b6abb450cad3d4410ab8456253600f58ddb66cfe6d79e1c8415536

                                                                                                                  • /etc/32678

                                                                                                                    Filesize

                                                                                                                    61B

                                                                                                                    MD5

                                                                                                                    768eaf287796da19e1cf5e0b2fb1b161

                                                                                                                    SHA1

                                                                                                                    6a1ce2ee5ccc86d1f33806feb14547b35290df2a

                                                                                                                    SHA256

                                                                                                                    1d22620dfb2a6715e5d745aed5cf841ede0e75e1747f12b9b925a2d346bc7ecb

                                                                                                                    SHA512

                                                                                                                    e6af30c9df4f7f47696069511e64ecbc8e841629d692ee4056503df3533fb7a7a74960698826260355e1dba7b6c562482a27a39bb51a4237473ce4b68472d620

                                                                                                                  • /etc/id.services.conf

                                                                                                                    Filesize

                                                                                                                    5.0MB

                                                                                                                    MD5

                                                                                                                    248846ad88fdaccddece36b05811a576

                                                                                                                    SHA1

                                                                                                                    2dac57a664c60e1dbe1b51bd75b74ab7980bff30

                                                                                                                    SHA256

                                                                                                                    0c1c800bbbce56afc46ceccc33b8e703d6f43673c92c07a43d2e980d0e427bde

                                                                                                                    SHA512

                                                                                                                    0923b7b888aa9e15cff490093f2b626ed864e11cd1b31dc6e52b633dc1a054e2eb211b96a033ecbe9455ce93469ffa625037125e20ad400e619188ab766e898e

                                                                                                                  • /etc/init.d/linux_kill

                                                                                                                    Filesize

                                                                                                                    189B

                                                                                                                    MD5

                                                                                                                    3909975f7cc0d1121c1819b800069f31

                                                                                                                    SHA1

                                                                                                                    3e68de708c2e6c40fab6794afdee3104e5590189

                                                                                                                    SHA256

                                                                                                                    6876dac71f13a068afb863d257134275f2edba43b2acaf4924fabf97c079070b

                                                                                                                    SHA512

                                                                                                                    50600cceeb03b05f45ae61d890caee9f51ff390b6776930866e527e071d65d08241fc66673fd9b99d62fbc77d3c00fc3de4d7378cbc42f5daba5d83072b0906e

                                                                                                                  • /etc/profile.d/bash_config.sh

                                                                                                                    Filesize

                                                                                                                    37B

                                                                                                                    MD5

                                                                                                                    cfb4e51061485fe91169381fbdc1538e

                                                                                                                    SHA1

                                                                                                                    9a85b9b766a15b01737a41d680e4593b7a9bde87

                                                                                                                    SHA256

                                                                                                                    897f37267d0ceaa2fbdaa09847f5d08e6f8b01a0348a0d666264b0f10acd0c90

                                                                                                                    SHA512

                                                                                                                    fb154ec711d2090a7461da4db8ddad2b522649a27e74162ecb203f539b1729430288bc02d78d2071bde9c4bbc005693403a57612ef50277d52f816cb94524216