Analysis

  • max time kernel
    149s
  • max time network
    154s
  • platform
    ubuntu-22.04_amd64
  • resource
    ubuntu2204-amd64-20240611-en
  • resource tags

    arch:amd64arch:i386image:ubuntu2204-amd64-20240611-enkernel:5.15.0-105-genericlocale:en-usos:ubuntu-22.04-amd64system
  • submitted
    05-11-2024 02:03

General

  • Target

    0b3a333c1f4c6802a71f9cebe9d106537c92dc0bd9ed125de41eba9af5b015c1.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 1 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.

  • Modifies systemd 2 TTPs 1 IoCs

    Adds/ modifies systemd service files. Likely to achieve persistence.

  • Write file to user bin folder 6 IoCs
  • Modifies Bash startup script 2 TTPs 3 IoCs
  • Changes its process name 1 IoCs
  • Enumerates kernel/hardware configuration 1 TTPs 2 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/0b3a333c1f4c6802a71f9cebe9d106537c92dc0bd9ed125de41eba9af5b015c1.elf
    /tmp/0b3a333c1f4c6802a71f9cebe9d106537c92dc0bd9ed125de41eba9af5b015c1.elf
    1⤵
    • Enumerates kernel/hardware configuration
    PID:1600
    • /usr/bin/sh
      sh -c "/etc/32678&"
      2⤵
        PID:1604
      • /usr/sbin/service
        service crond start
        2⤵
          PID:1605
          • /usr/bin/basename
            basename /usr/sbin/service
            3⤵
              PID:1608
            • /usr/bin/basename
              basename /usr/sbin/service
              3⤵
                PID:1610
              • /usr/bin/sed
                sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                3⤵
                  PID:1619
                • /usr/bin/systemctl
                  systemctl list-unit-files --full "--type=socket"
                  3⤵
                  • Reads runtime system information
                  PID:1618
              • /tmp/0b3a333c1f4c6802a71f9cebe9d106537c92dc0bd9ed125de41eba9af5b015c1.elf
                /tmp/0b3a333c1f4c6802a71f9cebe9d106537c92dc0bd9ed125de41eba9af5b015c1.elf " "
                2⤵
                • Modifies Watchdog functionality
                • Creates/modifies environment variables
                • Modifies init.d
                • Modifies systemd
                • Write file to user bin folder
                • Modifies Bash startup script
                • Changes its process name
                • Enumerates kernel/hardware configuration
                • Reads runtime system information
                PID:1607
                • /usr/sbin/update-rc.d
                  update-rc.d linux_kill defaults
                  3⤵
                    PID:1621
                    • /usr/local/sbin/systemctl
                      systemctl daemon-reload
                      4⤵
                        PID:1625
                      • /usr/local/bin/systemctl
                        systemctl daemon-reload
                        4⤵
                          PID:1625
                        • /usr/sbin/systemctl
                          systemctl daemon-reload
                          4⤵
                            PID:1625
                          • /usr/bin/systemctl
                            systemctl daemon-reload
                            4⤵
                              PID:1625
                          • /usr/bin/sh
                            sh -c "cd /boot;systemctl daemon-reload;systemctl enable linux.service;systemctl start linux.service;journalctl -xe --no-pager"
                            3⤵
                              PID:1659
                              • /usr/bin/systemctl
                                systemctl daemon-reload
                                4⤵
                                • Reads runtime system information
                                PID:1660
                              • /usr/bin/systemctl
                                systemctl enable linux.service
                                4⤵
                                  PID:1694
                                • /usr/bin/systemctl
                                  systemctl start linux.service
                                  4⤵
                                  • Reads runtime system information
                                  PID:1728
                                • /usr/bin/journalctl
                                  journalctl -xe --no-pager
                                  4⤵
                                    PID:1739
                                • /usr/bin/sh
                                  sh -c "cd /boot;ausearch -c 'System.img.conf' --raw | audit2allow -M my-Systemimgconf;semodule -X 300 -i my-Systemimgconf.pp"
                                  3⤵
                                    PID:1747
                                  • /usr/bin/bash
                                    bash -c "echo \"*/1 * * * * root /.img \" >> /etc/crontab"
                                    3⤵
                                    • Creates/modifies Cron job
                                    PID:1750
                                  • /usr/bin/renice
                                    renice -20 1607
                                    3⤵
                                      PID:1757
                                    • /usr/bin/mount
                                      mount -o bind /tmp/ /proc/1607
                                      3⤵
                                        PID:1758
                                      • /usr/sbin/service
                                        service cron start
                                        3⤵
                                          PID:1760
                                          • /usr/bin/basename
                                            basename /usr/sbin/service
                                            4⤵
                                              PID:1761
                                            • /usr/bin/basename
                                              basename /usr/sbin/service
                                              4⤵
                                                PID:1762
                                              • /usr/bin/sed
                                                sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                                                4⤵
                                                  PID:1765
                                                • /usr/bin/systemctl
                                                  systemctl list-unit-files --full "--type=socket"
                                                  4⤵
                                                    PID:1764
                                                • /usr/local/sbin/systemctl
                                                  systemctl start cron.service
                                                  3⤵
                                                    PID:1760
                                                  • /usr/local/bin/systemctl
                                                    systemctl start cron.service
                                                    3⤵
                                                      PID:1760
                                                    • /usr/sbin/systemctl
                                                      systemctl start cron.service
                                                      3⤵
                                                        PID:1760
                                                      • /usr/bin/systemctl
                                                        systemctl start cron.service
                                                        3⤵
                                                          PID:1760
                                                        • /usr/bin/systemctl
                                                          systemctl start crond.service
                                                          3⤵
                                                          • Reads runtime system information
                                                          PID:1766
                                                    • /etc/32678
                                                      /etc/32678
                                                      1⤵
                                                      • Executes dropped EXE
                                                      PID:1606
                                                      • /usr/bin/sleep
                                                        sleep 60
                                                        2⤵
                                                          PID:1609
                                                      • /usr/local/sbin/systemctl
                                                        systemctl start crond.service
                                                        1⤵
                                                          PID:1605
                                                        • /usr/local/bin/systemctl
                                                          systemctl start crond.service
                                                          1⤵
                                                            PID:1605
                                                          • /usr/sbin/systemctl
                                                            systemctl start crond.service
                                                            1⤵
                                                              PID:1605
                                                            • /usr/bin/systemctl
                                                              systemctl start crond.service
                                                              1⤵
                                                                PID:1605

                                                              Network

                                                              MITRE ATT&CK Enterprise v15

                                                              Replay Monitor

                                                              Loading Replay Monitor...

                                                              Downloads

                                                              • /.img

                                                                Filesize

                                                                33B

                                                                MD5

                                                                d73d3376908ea075a939e3871ad0fabe

                                                                SHA1

                                                                320ff65831247ba199515f1b94df26cc8a3e5f76

                                                                SHA256

                                                                edbdabe30d8236a2c0a4eb89dfd597552130e4c1a4e93f8fe1568920442ad73a

                                                                SHA512

                                                                57b83fef88620598beb5d65626bf757d0abef242d2d6a01796a61474dedc5095a4a9d0f292b6abb450cad3d4410ab8456253600f58ddb66cfe6d79e1c8415536

                                                              • /boot/System.img.config

                                                                Filesize

                                                                5.0MB

                                                                MD5

                                                                70a5c3d8f1090bca95a681e493ed4bd7

                                                                SHA1

                                                                aed4d2980a588c86aee6d12c4d598fb76a62e609

                                                                SHA256

                                                                0b3a333c1f4c6802a71f9cebe9d106537c92dc0bd9ed125de41eba9af5b015c1

                                                                SHA512

                                                                3cf26302247eea7dd3312f5ff5504e188dec58698c62c0236ed7f45de54bc235d11da9259b4daa775c954eb54ab9d5201962e91dc67eb49acee6fc560d0d8111

                                                              • /etc/32678

                                                                Filesize

                                                                61B

                                                                MD5

                                                                768eaf287796da19e1cf5e0b2fb1b161

                                                                SHA1

                                                                6a1ce2ee5ccc86d1f33806feb14547b35290df2a

                                                                SHA256

                                                                1d22620dfb2a6715e5d745aed5cf841ede0e75e1747f12b9b925a2d346bc7ecb

                                                                SHA512

                                                                e6af30c9df4f7f47696069511e64ecbc8e841629d692ee4056503df3533fb7a7a74960698826260355e1dba7b6c562482a27a39bb51a4237473ce4b68472d620

                                                              • /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