Analysis

  • max time kernel
    149s
  • max time network
    149s
  • 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
    04-11-2024 15:17

General

  • Target

    linux_386.elf

  • Size

    5.0MB

  • MD5

    70a5c3d8f1090bca95a681e493ed4bd7

  • SHA1

    aed4d2980a588c86aee6d12c4d598fb76a62e609

  • SHA256

    0b3a333c1f4c6802a71f9cebe9d106537c92dc0bd9ed125de41eba9af5b015c1

  • SHA512

    3cf26302247eea7dd3312f5ff5504e188dec58698c62c0236ed7f45de54bc235d11da9259b4daa775c954eb54ab9d5201962e91dc67eb49acee6fc560d0d8111

  • SSDEEP

    49152:E33d0lGt6UHcFL7Rn2o03wiEhiDmzzd/9sARlBs/00Cpfx9a9uN8p9hW16klbU6V:E33GlbU8FwmzzRDZ9mXqRV

Malware Config

Extracted

Family

kaiji

C2

78789.dns.army:7850

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:1512
    • /bin/sh
      sh -c "/etc/32678&"
      2⤵
        PID:1516
      • /usr/sbin/service
        service crond start
        2⤵
          PID:1517
          • /usr/bin/basename
            basename /usr/sbin/service
            3⤵
              PID:1520
            • /usr/bin/basename
              basename /usr/sbin/service
              3⤵
                PID:1529
              • /bin/systemctl
                systemctl --quiet is-active multi-user.target
                3⤵
                  PID:1532
                • /bin/sed
                  sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                  3⤵
                    PID:1540
                  • /bin/systemctl
                    systemctl list-unit-files --full "--type=socket"
                    3⤵
                      PID:1539
                  • /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:1519
                    • /usr/sbin/update-rc.d
                      update-rc.d linux_kill defaults
                      3⤵
                        PID:1534
                        • /usr/local/sbin/systemctl
                          systemctl daemon-reload
                          4⤵
                            PID:1547
                          • /usr/local/bin/systemctl
                            systemctl daemon-reload
                            4⤵
                              PID:1547
                            • /usr/sbin/systemctl
                              systemctl daemon-reload
                              4⤵
                                PID:1547
                              • /usr/bin/systemctl
                                systemctl daemon-reload
                                4⤵
                                  PID:1547
                                • /sbin/systemctl
                                  systemctl daemon-reload
                                  4⤵
                                    PID:1547
                                  • /bin/systemctl
                                    systemctl daemon-reload
                                    4⤵
                                      PID:1547
                                  • /bin/bash
                                    bash -c "echo \"*/1 * * * * root /.img \" >> /etc/crontab"
                                    3⤵
                                    • Creates/modifies Cron job
                                    PID:1551
                                  • /usr/bin/renice
                                    renice -20 1519
                                    3⤵
                                      PID:1552
                                    • /bin/mount
                                      mount -o bind /tmp/ /proc/1519
                                      3⤵
                                        PID:1553
                                      • /usr/sbin/service
                                        service cron start
                                        3⤵
                                          PID:1555
                                          • /usr/bin/basename
                                            basename /usr/sbin/service
                                            4⤵
                                              PID:1556
                                            • /usr/bin/basename
                                              basename /usr/sbin/service
                                              4⤵
                                                PID:1557
                                              • /bin/systemctl
                                                systemctl --quiet is-active multi-user.target
                                                4⤵
                                                • Reads runtime system information
                                                PID:1558
                                              • /bin/sed
                                                sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                                                4⤵
                                                  PID:1564
                                                • /bin/systemctl
                                                  systemctl list-unit-files --full "--type=socket"
                                                  4⤵
                                                  • Reads runtime system information
                                                  PID:1563
                                              • /usr/local/sbin/systemctl
                                                systemctl "--job-mode=ignore-dependencies" start cron.service
                                                3⤵
                                                  PID:1555
                                                • /usr/local/bin/systemctl
                                                  systemctl "--job-mode=ignore-dependencies" start cron.service
                                                  3⤵
                                                    PID:1555
                                                  • /usr/sbin/systemctl
                                                    systemctl "--job-mode=ignore-dependencies" start cron.service
                                                    3⤵
                                                      PID:1555
                                                    • /usr/bin/systemctl
                                                      systemctl "--job-mode=ignore-dependencies" start cron.service
                                                      3⤵
                                                        PID:1555
                                                      • /sbin/systemctl
                                                        systemctl "--job-mode=ignore-dependencies" start cron.service
                                                        3⤵
                                                          PID:1555
                                                        • /bin/systemctl
                                                          systemctl "--job-mode=ignore-dependencies" start cron.service
                                                          3⤵
                                                          • Reads runtime system information
                                                          PID:1555
                                                        • /bin/systemctl
                                                          systemctl start crond.service
                                                          3⤵
                                                            PID:1570
                                                      • /etc/32678
                                                        /etc/32678
                                                        1⤵
                                                        • Executes dropped EXE
                                                        PID:1518
                                                        • /bin/sleep
                                                          sleep 60
                                                          2⤵
                                                            PID:1524
                                                          • /etc/id.services.conf
                                                            /etc/id.services.conf
                                                            2⤵
                                                            • Executes dropped EXE
                                                            • Enumerates kernel/hardware configuration
                                                            PID:1587
                                                            • /usr/bin/pkill
                                                              pkill -9 32678
                                                              3⤵
                                                              • Reads CPU attributes
                                                              • Reads runtime system information
                                                              PID:1591
                                                            • /bin/sh
                                                              sh -c "/etc/32678&"
                                                              3⤵
                                                                PID:1592
                                                              • /usr/sbin/service
                                                                service crond start
                                                                3⤵
                                                                  PID:1593
                                                                  • /usr/bin/basename
                                                                    basename /usr/sbin/service
                                                                    4⤵
                                                                      PID:1596
                                                                    • /usr/bin/basename
                                                                      basename /usr/sbin/service
                                                                      4⤵
                                                                        PID:1598
                                                                      • /bin/systemctl
                                                                        systemctl --quiet is-active multi-user.target
                                                                        4⤵
                                                                          PID:1601
                                                                        • /bin/sed
                                                                          sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                                                                          4⤵
                                                                          • Reads runtime system information
                                                                          PID:1605
                                                                        • /bin/systemctl
                                                                          systemctl list-unit-files --full "--type=socket"
                                                                          4⤵
                                                                            PID:1604
                                                                        • /etc/id.services.conf
                                                                          /etc/id.services.conf " "
                                                                          3⤵
                                                                          • Executes dropped EXE
                                                                          • Enumerates kernel/hardware configuration
                                                                          PID:1595
                                                                    • /usr/local/sbin/systemctl
                                                                      systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                      1⤵
                                                                        PID:1517
                                                                      • /usr/local/bin/systemctl
                                                                        systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                        1⤵
                                                                          PID:1517
                                                                        • /usr/sbin/systemctl
                                                                          systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                          1⤵
                                                                            PID:1517
                                                                          • /usr/bin/systemctl
                                                                            systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                            1⤵
                                                                              PID:1517
                                                                            • /sbin/systemctl
                                                                              systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                              1⤵
                                                                                PID:1517
                                                                              • /bin/systemctl
                                                                                systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                1⤵
                                                                                  PID:1517
                                                                                • /etc/32678
                                                                                  /etc/32678
                                                                                  1⤵
                                                                                  • Executes dropped EXE
                                                                                  PID:1594
                                                                                  • /bin/sleep
                                                                                    sleep 60
                                                                                    2⤵
                                                                                      PID:1597
                                                                                    • /etc/id.services.conf
                                                                                      /etc/id.services.conf
                                                                                      2⤵
                                                                                      • Executes dropped EXE
                                                                                      • Enumerates kernel/hardware configuration
                                                                                      PID:1623
                                                                                      • /usr/bin/pkill
                                                                                        pkill -9 32678
                                                                                        3⤵
                                                                                        • Reads CPU attributes
                                                                                        • Reads runtime system information
                                                                                        PID:1627
                                                                                      • /bin/sh
                                                                                        sh -c "/etc/32678&"
                                                                                        3⤵
                                                                                          PID:1628
                                                                                        • /usr/sbin/service
                                                                                          service crond start
                                                                                          3⤵
                                                                                            PID:1629
                                                                                            • /usr/bin/basename
                                                                                              basename /usr/sbin/service
                                                                                              4⤵
                                                                                                PID:1632
                                                                                              • /usr/bin/basename
                                                                                                basename /usr/sbin/service
                                                                                                4⤵
                                                                                                  PID:1634
                                                                                                • /bin/systemctl
                                                                                                  systemctl --quiet is-active multi-user.target
                                                                                                  4⤵
                                                                                                  • Reads runtime system information
                                                                                                  PID:1637
                                                                                                • /bin/sed
                                                                                                  sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                                                                                                  4⤵
                                                                                                    PID:1641
                                                                                                  • /bin/systemctl
                                                                                                    systemctl list-unit-files --full "--type=socket"
                                                                                                    4⤵
                                                                                                      PID:1640
                                                                                                  • /etc/id.services.conf
                                                                                                    /etc/id.services.conf " "
                                                                                                    3⤵
                                                                                                    • Executes dropped EXE
                                                                                                    • Enumerates kernel/hardware configuration
                                                                                                    PID:1631
                                                                                              • /usr/local/sbin/systemctl
                                                                                                systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                1⤵
                                                                                                  PID:1593
                                                                                                • /usr/local/bin/systemctl
                                                                                                  systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                  1⤵
                                                                                                    PID:1593
                                                                                                  • /usr/sbin/systemctl
                                                                                                    systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                    1⤵
                                                                                                      PID:1593
                                                                                                    • /usr/bin/systemctl
                                                                                                      systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                      1⤵
                                                                                                        PID:1593
                                                                                                      • /sbin/systemctl
                                                                                                        systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                        1⤵
                                                                                                          PID:1593
                                                                                                        • /bin/systemctl
                                                                                                          systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                          1⤵
                                                                                                          • Reads runtime system information
                                                                                                          PID:1593
                                                                                                        • /etc/32678
                                                                                                          /etc/32678
                                                                                                          1⤵
                                                                                                          • Executes dropped EXE
                                                                                                          PID:1630
                                                                                                          • /bin/sleep
                                                                                                            sleep 60
                                                                                                            2⤵
                                                                                                              PID:1633
                                                                                                          • /usr/local/sbin/systemctl
                                                                                                            systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                            1⤵
                                                                                                              PID:1629
                                                                                                            • /usr/local/bin/systemctl
                                                                                                              systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                              1⤵
                                                                                                                PID:1629
                                                                                                              • /usr/sbin/systemctl
                                                                                                                systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                                1⤵
                                                                                                                  PID:1629
                                                                                                                • /usr/bin/systemctl
                                                                                                                  systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                                  1⤵
                                                                                                                    PID:1629
                                                                                                                  • /sbin/systemctl
                                                                                                                    systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                                    1⤵
                                                                                                                      PID:1629
                                                                                                                    • /bin/systemctl
                                                                                                                      systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                                      1⤵
                                                                                                                        PID:1629

                                                                                                                      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

                                                                                                                        70a5c3d8f1090bca95a681e493ed4bd7

                                                                                                                        SHA1

                                                                                                                        aed4d2980a588c86aee6d12c4d598fb76a62e609

                                                                                                                        SHA256

                                                                                                                        0b3a333c1f4c6802a71f9cebe9d106537c92dc0bd9ed125de41eba9af5b015c1

                                                                                                                        SHA512

                                                                                                                        3cf26302247eea7dd3312f5ff5504e188dec58698c62c0236ed7f45de54bc235d11da9259b4daa775c954eb54ab9d5201962e91dc67eb49acee6fc560d0d8111

                                                                                                                      • /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