Analysis

  • max time kernel
    149s
  • max time network
    149s
  • 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
    03-11-2024 14:44

General

  • Target

    a65f1664ac6666e1e1b324464d5a3a125c89764940a022d056b9a2d65ad5ed0e.elf

  • Size

    1.8MB

  • MD5

    3b0cc5dd65238abdc55e9c47d0d8660f

  • SHA1

    81d42740e04d5378d96c1a8ebd7de21863225dc4

  • SHA256

    a65f1664ac6666e1e1b324464d5a3a125c89764940a022d056b9a2d65ad5ed0e

  • SHA512

    dbd19679e394a0ca56742f6b29fb8fc15adb0bfa6f714250b788a9b53199a1a74c9c39a94ea13fc5b06b846cc93c86f56ccdf34ffd1ad8cd09e826cf513f99df

  • SSDEEP

    24576:ae9ufJvk4gQjMNRfktnsIXvZFyD9i+MPCIxyuzNqssZXJj4bdYVVMtIwWz1v:WYMnwRO4ssPcd5Wz1

Malware Config

Extracted

Family

kaiji

C2

ss.us-tv.top:1930

Signatures

  • Kaiji 1 IoCs

    Kaiji payload

  • Kaiji family
  • Executes dropped EXE 5 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 33 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 12 IoCs
  • Modifies Bash startup script 2 TTPs 3 IoCs
  • Command and Scripting Interpreter: Unix Shell 1 TTPs 4 IoCs

    Execute scripts via Unix Shell.

  • 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.

Processes

  • /tmp/a65f1664ac6666e1e1b324464d5a3a125c89764940a022d056b9a2d65ad5ed0e.elf
    /tmp/a65f1664ac6666e1e1b324464d5a3a125c89764940a022d056b9a2d65ad5ed0e.elf
    1⤵
    • Enumerates kernel/hardware configuration
    PID:1587
    • /tmp/a65f1664ac6666e1e1b324464d5a3a125c89764940a022d056b9a2d65ad5ed0e.elf
      /tmp/a65f1664ac6666e1e1b324464d5a3a125c89764940a022d056b9a2d65ad5ed0e.elf " "
      2⤵
      • Modifies Watchdog functionality
      • Creates/modifies environment variables
      • Modifies init.d
      • Modifies systemd
      • Write file to user bin folder
      • Modifies Bash startup script
      • Enumerates kernel/hardware configuration
      • Reads runtime system information
      PID:1591
      • /bin/sh
        /bin/sh -c "/etc/32676&"
        3⤵
        • Command and Scripting Interpreter: Unix Shell
        PID:1595
      • /usr/sbin/service
        service crond start
        3⤵
          PID:1597
          • /usr/bin/basename
            basename /usr/sbin/service
            4⤵
              PID:1599
            • /usr/bin/basename
              basename /usr/sbin/service
              4⤵
                PID:1600
              • /usr/bin/sed
                sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                4⤵
                  PID:1603
                • /usr/bin/systemctl
                  systemctl list-unit-files --full "--type=socket"
                  4⤵
                    PID:1602
                • /usr/local/sbin/systemctl
                  systemctl start crond.service
                  3⤵
                    PID:1597
                  • /usr/local/bin/systemctl
                    systemctl start crond.service
                    3⤵
                      PID:1597
                    • /usr/sbin/systemctl
                      systemctl start crond.service
                      3⤵
                        PID:1597
                      • /usr/bin/systemctl
                        systemctl start crond.service
                        3⤵
                          PID:1597
                        • /bin/sh
                          /bin/sh -c "cd /boot;systemctl daemon-reload;systemctl enable quotaoff.service;systemctl start quotaoff.service;journalctl -xe --no-pager"
                          3⤵
                          • Command and Scripting Interpreter: Unix Shell
                          PID:1620
                          • /usr/bin/systemctl
                            systemctl daemon-reload
                            4⤵
                            • Reads runtime system information
                            PID:1621
                          • /usr/bin/systemctl
                            systemctl enable quotaoff.service
                            4⤵
                              PID:1655
                            • /usr/bin/systemctl
                              systemctl start quotaoff.service
                              4⤵
                              • Reads runtime system information
                              PID:1689
                            • /usr/bin/journalctl
                              journalctl -xe --no-pager
                              4⤵
                                PID:1697
                            • /bin/sh
                              /bin/sh -c "cd /boot;ausearch -c 'System.mod' --raw | audit2allow -M my-Systemmod;semodule -X 300 -i my-Systemmod.pp"
                              3⤵
                              • Command and Scripting Interpreter: Unix Shell
                              PID:1704
                            • /bin/sh
                              /bin/sh -c "echo \"*/1 * * * * root /.mod \" >> /etc/crontab"
                              3⤵
                              • Creates/modifies Cron job
                              • Command and Scripting Interpreter: Unix Shell
                              PID:1707
                            • /usr/bin/renice
                              renice -20 1591
                              3⤵
                                PID:1708
                              • /usr/bin/mount
                                mount -o bind /tmp/ /proc/1591
                                3⤵
                                  PID:1709
                                • /usr/sbin/service
                                  service cron start
                                  3⤵
                                    PID:1711
                                    • /usr/bin/basename
                                      basename /usr/sbin/service
                                      4⤵
                                        PID:1712
                                      • /usr/bin/basename
                                        basename /usr/sbin/service
                                        4⤵
                                          PID:1713
                                        • /usr/bin/sed
                                          sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                                          4⤵
                                          • Reads runtime system information
                                          PID:1716
                                        • /usr/bin/systemctl
                                          systemctl list-unit-files --full "--type=socket"
                                          4⤵
                                            PID:1715
                                        • /usr/local/sbin/systemctl
                                          systemctl start cron.service
                                          3⤵
                                            PID:1711
                                          • /usr/local/bin/systemctl
                                            systemctl start cron.service
                                            3⤵
                                              PID:1711
                                            • /usr/sbin/systemctl
                                              systemctl start cron.service
                                              3⤵
                                                PID:1711
                                              • /usr/bin/systemctl
                                                systemctl start cron.service
                                                3⤵
                                                • Reads runtime system information
                                                PID:1711
                                              • /usr/bin/systemctl
                                                systemctl start crond.service
                                                3⤵
                                                  PID:1723
                                            • /etc/32676
                                              /etc/32676
                                              1⤵
                                              • Executes dropped EXE
                                              PID:1596
                                              • /usr/bin/sleep
                                                sleep 60
                                                2⤵
                                                  PID:1598
                                                • /etc/opt.services.cfg
                                                  /etc/opt.services.cfg
                                                  2⤵
                                                  • Executes dropped EXE
                                                  • Enumerates kernel/hardware configuration
                                                  PID:1740
                                                  • /etc/opt.services.cfg
                                                    /etc/opt.services.cfg " "
                                                    3⤵
                                                    • Executes dropped EXE
                                                    • Enumerates kernel/hardware configuration
                                                    PID:1744
                                                • /usr/bin/sleep
                                                  sleep 60
                                                  2⤵
                                                    PID:1745
                                                  • /etc/opt.services.cfg
                                                    /etc/opt.services.cfg
                                                    2⤵
                                                    • Executes dropped EXE
                                                    • Enumerates kernel/hardware configuration
                                                    PID:1760
                                                    • /etc/opt.services.cfg
                                                      /etc/opt.services.cfg " "
                                                      3⤵
                                                      • Executes dropped EXE
                                                      • Enumerates kernel/hardware configuration
                                                      PID:1764
                                                  • /usr/bin/sleep
                                                    sleep 60
                                                    2⤵
                                                      PID:1765

                                                  Network

                                                  MITRE ATT&CK Enterprise v15

                                                  Replay Monitor

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                                                  Downloads

                                                  • /.mod

                                                    Filesize

                                                    34B

                                                    MD5

                                                    f5a3713282e43c200f30342f5ff5e2ea

                                                    SHA1

                                                    2b2ce1a207e2b691a074c6f78f71c4785aae426a

                                                    SHA256

                                                    6ab64e727571458d4884fb2fe82c27c467db0699cb8f648b3f0217c35d2b7511

                                                    SHA512

                                                    5bcb8cd360409147a486755f90e0cdd97183af02ce8de5135b7c6a8a010deb9ef12dcd5ee9a2a8fd2e159347f68e72d6b7fd75e943b4fcd928d7a74b97476013

                                                  • /boot/System.mod

                                                    Filesize

                                                    1.8MB

                                                    MD5

                                                    3b0cc5dd65238abdc55e9c47d0d8660f

                                                    SHA1

                                                    81d42740e04d5378d96c1a8ebd7de21863225dc4

                                                    SHA256

                                                    a65f1664ac6666e1e1b324464d5a3a125c89764940a022d056b9a2d65ad5ed0e

                                                    SHA512

                                                    dbd19679e394a0ca56742f6b29fb8fc15adb0bfa6f714250b788a9b53199a1a74c9c39a94ea13fc5b06b846cc93c86f56ccdf34ffd1ad8cd09e826cf513f99df

                                                  • /etc/.walk

                                                    Filesize

                                                    49B

                                                    MD5

                                                    780cd313a114965d95124917f5c02f47

                                                    SHA1

                                                    fb893ca00a38aba208553d4ede636ff636b187b3

                                                    SHA256

                                                    55f6c64f19ca65fe3e7618d6e5de1277166378440f0b181b13cc3ce7c40c38a4

                                                    SHA512

                                                    3047949f1b77e4af4c0d180a291af1b00372206d1fd7eb0edfb7932e73cb5bd0617f5c701f91d1ffd362918574afaf18fc664ae4c9db221efe2470b0dd87dd43

                                                  • /etc/.walk

                                                    Filesize

                                                    98B

                                                    MD5

                                                    91d72d702c7c0e7df8e472b6408ee8bc

                                                    SHA1

                                                    8886c0698dc7715bbd3d70b3dc8913dca367ce26

                                                    SHA256

                                                    487ac24d77b56855216f30a3530a8e6ad9692ac328667dffe60a5f1ca720d28e

                                                    SHA512

                                                    afeb1153564f2960095d1cc74c5591540417852bcc74eaa4e39a1e2e8e7abb1ab66e4476809e3eaebf970ed463a18d73721797022b85b415ed72040a7f71be78

                                                  • /etc/32676

                                                    Filesize

                                                    61B

                                                    MD5

                                                    47684525bfdf26f49fd1cf742b17c015

                                                    SHA1

                                                    c4ab14ba22420ff9acadfc698a38d0cd99e9fbfa

                                                    SHA256

                                                    b7ce294613dd2c237a4a50548bfcd5c14d166107f2d2e965499bc78695300d5b

                                                    SHA512

                                                    948f9c519ae9afe1c821c5d58da2e584e50356dabef597ccd408853a9038560b9fb1c5894900e2725b48977ffd49d18a439436bb4946e2164ac9fcf2a8637621

                                                  • /etc/profile.d/gateway.sh

                                                    Filesize

                                                    5KB

                                                    MD5

                                                    e31c48334ee659ca0ada6f367f07c758

                                                    SHA1

                                                    3c2a034e38f5bf41a4f702c082fbffad687a8207

                                                    SHA256

                                                    d24f0710e2e828fac572d07333643baa15b99353f70bc7e9f3e08cc5ba24e573

                                                    SHA512

                                                    076066062e8b44171766a81261d088748e4b11ae27876e3a78be332c6a6cb5c9b2d802e4413c7f3cd2d5d5b41a0ebaf83080aac6268250cf44476769b3a082ca

                                                  • /usr/lib/systemd/system/quotaoff.service

                                                    Filesize

                                                    186B

                                                    MD5

                                                    b02de6cd28cd922b18d9d93375a70d8b

                                                    SHA1

                                                    021426a5a2ff9edc80ba5936c94b37525538885e

                                                    SHA256

                                                    d8d8e5cd33aa3450cd74c63716a02f3dff39efef2836559f110bc93663b1380a

                                                    SHA512

                                                    db3fe03ad5e599e6c03aaec7bf1242f5509fbb624adb9afb7499e25487daef3f3f1c6babf51570b527a5ac5c9f4b079ae4cc53baa9497c0a121328bef8d04422