Analysis

  • max time kernel
    149s
  • max time network
    150s
  • 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
    02-11-2024 02:52

General

  • Target

    3b0cc5dd65238abdc55e9c47d0d8660f.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/3b0cc5dd65238abdc55e9c47d0d8660f.elf
    /tmp/3b0cc5dd65238abdc55e9c47d0d8660f.elf
    1⤵
    • Enumerates kernel/hardware configuration
    PID:1566
    • /tmp/3b0cc5dd65238abdc55e9c47d0d8660f.elf
      /tmp/3b0cc5dd65238abdc55e9c47d0d8660f.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:1570
      • /bin/sh
        /bin/sh -c "/etc/32676&"
        3⤵
        • Command and Scripting Interpreter: Unix Shell
        PID:1574
      • /usr/sbin/service
        service crond start
        3⤵
          PID:1576
          • /usr/bin/basename
            basename /usr/sbin/service
            4⤵
              PID:1578
            • /usr/bin/basename
              basename /usr/sbin/service
              4⤵
                PID:1579
              • /usr/bin/sed
                sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                4⤵
                  PID:1582
                • /usr/bin/systemctl
                  systemctl list-unit-files --full "--type=socket"
                  4⤵
                    PID:1581
                • /usr/local/sbin/systemctl
                  systemctl start crond.service
                  3⤵
                    PID:1576
                  • /usr/local/bin/systemctl
                    systemctl start crond.service
                    3⤵
                      PID:1576
                    • /usr/sbin/systemctl
                      systemctl start crond.service
                      3⤵
                        PID:1576
                      • /usr/bin/systemctl
                        systemctl start crond.service
                        3⤵
                        • Reads runtime system information
                        PID:1576
                      • /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:1586
                        • /usr/bin/systemctl
                          systemctl daemon-reload
                          4⤵
                          • Reads runtime system information
                          PID:1587
                        • /usr/bin/systemctl
                          systemctl enable quotaoff.service
                          4⤵
                            PID:1621
                          • /usr/bin/systemctl
                            systemctl start quotaoff.service
                            4⤵
                            • Reads runtime system information
                            PID:1655
                          • /usr/bin/journalctl
                            journalctl -xe --no-pager
                            4⤵
                              PID:1672
                          • /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:1673
                          • /bin/sh
                            /bin/sh -c "echo \"*/1 * * * * root /.mod \" >> /etc/crontab"
                            3⤵
                            • Creates/modifies Cron job
                            • Command and Scripting Interpreter: Unix Shell
                            PID:1676
                          • /usr/bin/renice
                            renice -20 1570
                            3⤵
                              PID:1677
                            • /usr/bin/mount
                              mount -o bind /tmp/ /proc/1570
                              3⤵
                              • Reads runtime system information
                              PID:1678
                            • /usr/sbin/service
                              service cron start
                              3⤵
                                PID:1680
                                • /usr/bin/basename
                                  basename /usr/sbin/service
                                  4⤵
                                    PID:1681
                                  • /usr/bin/basename
                                    basename /usr/sbin/service
                                    4⤵
                                      PID:1682
                                    • /usr/bin/sed
                                      sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                                      4⤵
                                      • Reads runtime system information
                                      PID:1685
                                    • /usr/bin/systemctl
                                      systemctl list-unit-files --full "--type=socket"
                                      4⤵
                                        PID:1684
                                    • /usr/local/sbin/systemctl
                                      systemctl start cron.service
                                      3⤵
                                        PID:1680
                                      • /usr/local/bin/systemctl
                                        systemctl start cron.service
                                        3⤵
                                          PID:1680
                                        • /usr/sbin/systemctl
                                          systemctl start cron.service
                                          3⤵
                                            PID:1680
                                          • /usr/bin/systemctl
                                            systemctl start cron.service
                                            3⤵
                                              PID:1680
                                            • /usr/bin/systemctl
                                              systemctl start crond.service
                                              3⤵
                                                PID:1692
                                          • /etc/32676
                                            /etc/32676
                                            1⤵
                                            • Executes dropped EXE
                                            PID:1575
                                            • /usr/bin/sleep
                                              sleep 60
                                              2⤵
                                                PID:1577
                                              • /etc/opt.services.cfg
                                                /etc/opt.services.cfg
                                                2⤵
                                                • Executes dropped EXE
                                                • Enumerates kernel/hardware configuration
                                                PID:1710
                                                • /etc/opt.services.cfg
                                                  /etc/opt.services.cfg " "
                                                  3⤵
                                                  • Executes dropped EXE
                                                  • Enumerates kernel/hardware configuration
                                                  PID:1714
                                              • /usr/bin/sleep
                                                sleep 60
                                                2⤵
                                                  PID:1715
                                                • /etc/opt.services.cfg
                                                  /etc/opt.services.cfg
                                                  2⤵
                                                  • Executes dropped EXE
                                                  • Enumerates kernel/hardware configuration
                                                  PID:1733
                                                  • /etc/opt.services.cfg
                                                    /etc/opt.services.cfg " "
                                                    3⤵
                                                    • Executes dropped EXE
                                                    • Enumerates kernel/hardware configuration
                                                    PID:1737
                                                • /usr/bin/sleep
                                                  sleep 60
                                                  2⤵
                                                    PID:1738

                                                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

                                                  40595461f427c113e5505f63c9165272

                                                  SHA1

                                                  2d4119ad9acdc8da6e657450f292575315e509d9

                                                  SHA256

                                                  f5c98ed235c62ae45e659366217fedd51f4839f071b352160974c1e3449fa4fd

                                                  SHA512

                                                  ea8ad2c365bac449794501919d55676eb3ec208b2367401c83448bc6fb7f2e3a37b47af08fe2e6201e050c7118522c88bacf5da14277e9d4ec9a30f5360ce2a7

                                                • /etc/.walk

                                                  Filesize

                                                  98B

                                                  MD5

                                                  5b1e364dc3af0bb5c9ce0f958acf7601

                                                  SHA1

                                                  5e6f7355c5a19df1862888b075cf02567a25729c

                                                  SHA256

                                                  cdde40530b3e0ccf7a1faa923dc3b0f8a5016640fc63d2bad81cbc19267b4dae

                                                  SHA512

                                                  4f3d2c70ed6f6e73c4e49d0a65d15d4a4eac529dcad1e2349ebdc5c27c3cece880cca77c4e130ed036d2a116b9bb142ab3f75132eaf3726c0d9360464ad94889

                                                • /etc/32676

                                                  Filesize

                                                  61B

                                                  MD5

                                                  47684525bfdf26f49fd1cf742b17c015

                                                  SHA1

                                                  c4ab14ba22420ff9acadfc698a38d0cd99e9fbfa

                                                  SHA256

                                                  b7ce294613dd2c237a4a50548bfcd5c14d166107f2d2e965499bc78695300d5b

                                                  SHA512

                                                  948f9c519ae9afe1c821c5d58da2e584e50356dabef597ccd408853a9038560b9fb1c5894900e2725b48977ffd49d18a439436bb4946e2164ac9fcf2a8637621

                                                • /etc/profile.d/gateway.sh

                                                  Filesize

                                                  5KB

                                                  MD5

                                                  56532f245c2605097bd537e4c2505374

                                                  SHA1

                                                  a34d24fcabd8096c72f8ab84c1da66f4874555a0

                                                  SHA256

                                                  9b3653645cc9b10026be425abc325af041e93c55d768d3834727e254069d9408

                                                  SHA512

                                                  e7e1151625d526fccc64ac93f84a7ae49dc25651e1183e3aa25d417ee7bd98c20abe3676067415397668d0a517dd4226962223026b5688cfcdec4d7520d68125

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

                                                  Filesize

                                                  186B

                                                  MD5

                                                  b02de6cd28cd922b18d9d93375a70d8b

                                                  SHA1

                                                  021426a5a2ff9edc80ba5936c94b37525538885e

                                                  SHA256

                                                  d8d8e5cd33aa3450cd74c63716a02f3dff39efef2836559f110bc93663b1380a

                                                  SHA512

                                                  db3fe03ad5e599e6c03aaec7bf1242f5509fbb624adb9afb7499e25487daef3f3f1c6babf51570b527a5ac5c9f4b079ae4cc53baa9497c0a121328bef8d04422