Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    debian-9_armhf
  • resource
    debian9-armhf-20240611-en
  • resource tags

    arch:armhfimage:debian9-armhf-20240611-enkernel:4.9.0-13-armmp-lpaelocale:en-usos:debian-9-armhfsystem
  • submitted
    05-11-2024 02:40

General

  • Target

    3bd7660e77cbac4a9c8e0d85c03fe144ff34177087dc739e2b66a1293653aeb0.elf

  • Size

    5.1MB

  • MD5

    8bd999abd9893c4be18600f481b04ad3

  • SHA1

    10080f79cd6bed96cb3c35e896443c37460b10bf

  • SHA256

    3bd7660e77cbac4a9c8e0d85c03fe144ff34177087dc739e2b66a1293653aeb0

  • SHA512

    81601a5cfa807f87628bc75aa16c7d9a4d052961e33e0423bffd520063fcb399f79ba6594715704e2dc8926989fd1293a5842c8cd08a60f4fed55fb88e519c09

  • SSDEEP

    98304:8cSBHdgN2a7JP97kJru8cYWPAXqDu+60:8cS03Lu+6

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 1 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 20 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/3bd7660e77cbac4a9c8e0d85c03fe144ff34177087dc739e2b66a1293653aeb0.elf
    /tmp/3bd7660e77cbac4a9c8e0d85c03fe144ff34177087dc739e2b66a1293653aeb0.elf
    1⤵
    • Enumerates kernel/hardware configuration
    PID:653
    • /bin/sh
      sh -c "/etc/32678&"
      2⤵
        PID:670
        • /etc/32678
          /etc/32678
          3⤵
          • Executes dropped EXE
          PID:675
          • /bin/sleep
            sleep 60
            4⤵
              PID:678
            • /etc/id.services.conf
              /etc/id.services.conf
              4⤵
              • Executes dropped EXE
              • Enumerates kernel/hardware configuration
              PID:814
              • /usr/bin/pkill
                pkill -9 32678
                5⤵
                • Reads CPU attributes
                • Reads runtime system information
                PID:818
              • /bin/sh
                sh -c "/etc/32678&"
                5⤵
                  PID:819
                • /usr/sbin/service
                  service crond start
                  5⤵
                    PID:820
                    • /usr/bin/basename
                      basename /usr/sbin/service
                      6⤵
                        PID:823
                      • /usr/bin/basename
                        basename /usr/sbin/service
                        6⤵
                          PID:825
                        • /bin/systemctl
                          systemctl --quiet is-active multi-user.target
                          6⤵
                          • Enumerates kernel/hardware configuration
                          • Reads runtime system information
                          PID:829
                        • /bin/systemctl
                          systemctl list-unit-files --full "--type=socket"
                          6⤵
                          • Enumerates kernel/hardware configuration
                          PID:831
                        • /bin/sed
                          sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                          6⤵
                            PID:832
                        • /etc/id.services.conf
                          /etc/id.services.conf " "
                          5⤵
                          • Executes dropped EXE
                          • Enumerates kernel/hardware configuration
                          PID:821
                  • /usr/sbin/service
                    service crond start
                    2⤵
                      PID:671
                      • /usr/bin/basename
                        basename /usr/sbin/service
                        3⤵
                          PID:677
                        • /usr/bin/basename
                          basename /usr/sbin/service
                          3⤵
                            PID:684
                          • /bin/systemctl
                            systemctl --quiet is-active multi-user.target
                            3⤵
                            • Enumerates kernel/hardware configuration
                            • Reads runtime system information
                            PID:689
                          • /bin/systemctl
                            systemctl list-unit-files --full "--type=socket"
                            3⤵
                            • Enumerates kernel/hardware configuration
                            PID:695
                          • /bin/sed
                            sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                            3⤵
                              PID:696
                          • /tmp/3bd7660e77cbac4a9c8e0d85c03fe144ff34177087dc739e2b66a1293653aeb0.elf
                            /tmp/3bd7660e77cbac4a9c8e0d85c03fe144ff34177087dc739e2b66a1293653aeb0.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:672
                            • /usr/sbin/update-rc.d
                              update-rc.d linux_kill defaults
                              3⤵
                                PID:691
                                • /usr/local/sbin/systemctl
                                  systemctl daemon-reload
                                  4⤵
                                    PID:699
                                  • /usr/local/bin/systemctl
                                    systemctl daemon-reload
                                    4⤵
                                      PID:699
                                    • /usr/sbin/systemctl
                                      systemctl daemon-reload
                                      4⤵
                                        PID:699
                                      • /usr/bin/systemctl
                                        systemctl daemon-reload
                                        4⤵
                                          PID:699
                                        • /sbin/systemctl
                                          systemctl daemon-reload
                                          4⤵
                                            PID:699
                                          • /bin/systemctl
                                            systemctl daemon-reload
                                            4⤵
                                            • Enumerates kernel/hardware configuration
                                            PID:699
                                        • /bin/bash
                                          bash -c "echo \"*/1 * * * * root /.img \" >> /etc/crontab"
                                          3⤵
                                          • Creates/modifies Cron job
                                          PID:705
                                        • /usr/bin/renice
                                          renice -20 672
                                          3⤵
                                            PID:706
                                          • /bin/mount
                                            mount -o bind /tmp/ /proc/672
                                            3⤵
                                              PID:707
                                            • /usr/sbin/service
                                              service cron start
                                              3⤵
                                                PID:708
                                                • /usr/bin/basename
                                                  basename /usr/sbin/service
                                                  4⤵
                                                    PID:709
                                                  • /usr/bin/basename
                                                    basename /usr/sbin/service
                                                    4⤵
                                                      PID:710
                                                    • /bin/systemctl
                                                      systemctl --quiet is-active multi-user.target
                                                      4⤵
                                                      • Enumerates kernel/hardware configuration
                                                      PID:711
                                                    • /bin/systemctl
                                                      systemctl list-unit-files --full "--type=socket"
                                                      4⤵
                                                      • Enumerates kernel/hardware configuration
                                                      PID:713
                                                    • /bin/sed
                                                      sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                                                      4⤵
                                                        PID:714
                                                    • /usr/local/sbin/systemctl
                                                      systemctl "--job-mode=ignore-dependencies" start cron.service
                                                      3⤵
                                                        PID:708
                                                      • /usr/local/bin/systemctl
                                                        systemctl "--job-mode=ignore-dependencies" start cron.service
                                                        3⤵
                                                          PID:708
                                                        • /usr/sbin/systemctl
                                                          systemctl "--job-mode=ignore-dependencies" start cron.service
                                                          3⤵
                                                            PID:708
                                                          • /usr/bin/systemctl
                                                            systemctl "--job-mode=ignore-dependencies" start cron.service
                                                            3⤵
                                                              PID:708
                                                            • /sbin/systemctl
                                                              systemctl "--job-mode=ignore-dependencies" start cron.service
                                                              3⤵
                                                                PID:708
                                                              • /bin/systemctl
                                                                systemctl "--job-mode=ignore-dependencies" start cron.service
                                                                3⤵
                                                                • Enumerates kernel/hardware configuration
                                                                • Reads runtime system information
                                                                PID:708
                                                              • /bin/systemctl
                                                                systemctl start crond.service
                                                                3⤵
                                                                • Enumerates kernel/hardware configuration
                                                                • Reads runtime system information
                                                                PID:715
                                                          • /usr/local/sbin/systemctl
                                                            systemctl "--job-mode=ignore-dependencies" start crond.service
                                                            1⤵
                                                              PID:671
                                                            • /usr/local/bin/systemctl
                                                              systemctl "--job-mode=ignore-dependencies" start crond.service
                                                              1⤵
                                                                PID:671
                                                              • /usr/sbin/systemctl
                                                                systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                1⤵
                                                                  PID:671
                                                                • /usr/bin/systemctl
                                                                  systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                  1⤵
                                                                    PID:671
                                                                  • /sbin/systemctl
                                                                    systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                    1⤵
                                                                      PID:671
                                                                    • /bin/systemctl
                                                                      systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                      1⤵
                                                                      • Enumerates kernel/hardware configuration
                                                                      PID:671
                                                                    • /etc/32678
                                                                      /etc/32678
                                                                      1⤵
                                                                      • Executes dropped EXE
                                                                      PID:822
                                                                      • /bin/sleep
                                                                        sleep 60
                                                                        2⤵
                                                                          PID:824
                                                                        • /etc/id.services.conf
                                                                          /etc/id.services.conf
                                                                          2⤵
                                                                          • Executes dropped EXE
                                                                          • Enumerates kernel/hardware configuration
                                                                          PID:853
                                                                          • /usr/bin/pkill
                                                                            pkill -9 32678
                                                                            3⤵
                                                                            • Reads CPU attributes
                                                                            • Reads runtime system information
                                                                            PID:857
                                                                          • /bin/sh
                                                                            sh -c "/etc/32678&"
                                                                            3⤵
                                                                              PID:858
                                                                            • /usr/sbin/service
                                                                              service crond start
                                                                              3⤵
                                                                                PID:859
                                                                                • /usr/bin/basename
                                                                                  basename /usr/sbin/service
                                                                                  4⤵
                                                                                    PID:862
                                                                                  • /usr/bin/basename
                                                                                    basename /usr/sbin/service
                                                                                    4⤵
                                                                                      PID:864
                                                                                    • /bin/systemctl
                                                                                      systemctl --quiet is-active multi-user.target
                                                                                      4⤵
                                                                                      • Enumerates kernel/hardware configuration
                                                                                      PID:868
                                                                                    • /bin/systemctl
                                                                                      systemctl list-unit-files --full "--type=socket"
                                                                                      4⤵
                                                                                      • Enumerates kernel/hardware configuration
                                                                                      PID:870
                                                                                    • /bin/sed
                                                                                      sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                                                                                      4⤵
                                                                                        PID:871
                                                                                    • /etc/id.services.conf
                                                                                      /etc/id.services.conf " "
                                                                                      3⤵
                                                                                      • Executes dropped EXE
                                                                                      • Enumerates kernel/hardware configuration
                                                                                      PID:860
                                                                                • /usr/local/sbin/systemctl
                                                                                  systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                  1⤵
                                                                                    PID:820
                                                                                  • /usr/local/bin/systemctl
                                                                                    systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                    1⤵
                                                                                      PID:820
                                                                                    • /usr/sbin/systemctl
                                                                                      systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                      1⤵
                                                                                        PID:820
                                                                                      • /usr/bin/systemctl
                                                                                        systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                        1⤵
                                                                                          PID:820
                                                                                        • /sbin/systemctl
                                                                                          systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                          1⤵
                                                                                            PID:820
                                                                                          • /bin/systemctl
                                                                                            systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                            1⤵
                                                                                            • Enumerates kernel/hardware configuration
                                                                                            • Reads runtime system information
                                                                                            PID:820
                                                                                          • /etc/32678
                                                                                            /etc/32678
                                                                                            1⤵
                                                                                            • Executes dropped EXE
                                                                                            PID:861
                                                                                            • /bin/sleep
                                                                                              sleep 60
                                                                                              2⤵
                                                                                                PID:863
                                                                                            • /usr/local/sbin/systemctl
                                                                                              systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                              1⤵
                                                                                                PID:859
                                                                                              • /usr/local/bin/systemctl
                                                                                                systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                1⤵
                                                                                                  PID:859
                                                                                                • /usr/sbin/systemctl
                                                                                                  systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                  1⤵
                                                                                                    PID:859
                                                                                                  • /usr/bin/systemctl
                                                                                                    systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                    1⤵
                                                                                                      PID:859
                                                                                                    • /sbin/systemctl
                                                                                                      systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                      1⤵
                                                                                                        PID:859
                                                                                                      • /bin/systemctl
                                                                                                        systemctl "--job-mode=ignore-dependencies" start crond.service
                                                                                                        1⤵
                                                                                                        • Enumerates kernel/hardware configuration
                                                                                                        PID:859

                                                                                                      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

                                                                                                        5.1MB

                                                                                                        MD5

                                                                                                        8bd999abd9893c4be18600f481b04ad3

                                                                                                        SHA1

                                                                                                        10080f79cd6bed96cb3c35e896443c37460b10bf

                                                                                                        SHA256

                                                                                                        3bd7660e77cbac4a9c8e0d85c03fe144ff34177087dc739e2b66a1293653aeb0

                                                                                                        SHA512

                                                                                                        81601a5cfa807f87628bc75aa16c7d9a4d052961e33e0423bffd520063fcb399f79ba6594715704e2dc8926989fd1293a5842c8cd08a60f4fed55fb88e519c09

                                                                                                      • /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