Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    ubuntu-22.04_amd64
  • resource
    ubuntu2204-amd64-20240729-en
  • resource tags

    arch:amd64arch:i386image:ubuntu2204-amd64-20240729-enkernel:5.15.0-105-genericlocale:en-usos:ubuntu-22.04-amd64system
  • submitted
    02-11-2024 02:52

General

  • Target

    e55a695d2530b3fb5c80256f6036de29.elf

  • Size

    1.9MB

  • MD5

    e55a695d2530b3fb5c80256f6036de29

  • SHA1

    cbf9fb21338b161a6b5ab67425e8afbcf9bbcd93

  • SHA256

    ce2944509d3936280343639c38ed5240f0a35c8d1dd63a00ce0eef1052325124

  • SHA512

    a59fec7fe64abf676a4b40737eaf4b5824daf78c78324ef1e8b58114f81bbeda4edb281fab0582026dd8363314905d0259b20ac842f9016f4da8bf1dab0fc89d

  • SSDEEP

    49152:XXPVKrbvGOQLeS7rb/TCvO90d7HjmAFd4A64nsfJrkaani38B4B+g2vUqHOErz1:tPXZz

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/e55a695d2530b3fb5c80256f6036de29.elf
    /tmp/e55a695d2530b3fb5c80256f6036de29.elf
    1⤵
    • Enumerates kernel/hardware configuration
    PID:1574
    • /tmp/e55a695d2530b3fb5c80256f6036de29.elf
      /tmp/e55a695d2530b3fb5c80256f6036de29.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:1578
      • /bin/sh
        /bin/sh -c "/etc/32676&"
        3⤵
        • Command and Scripting Interpreter: Unix Shell
        PID:1585
      • /usr/sbin/service
        service crond start
        3⤵
          PID:1587
          • /usr/bin/basename
            basename /usr/sbin/service
            4⤵
              PID:1589
            • /usr/bin/basename
              basename /usr/sbin/service
              4⤵
                PID:1590
              • /usr/bin/sed
                sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                4⤵
                  PID:1593
                • /usr/bin/systemctl
                  systemctl list-unit-files --full "--type=socket"
                  4⤵
                  • Reads runtime system information
                  PID:1592
              • /usr/local/sbin/systemctl
                systemctl start crond.service
                3⤵
                  PID:1587
                • /usr/local/bin/systemctl
                  systemctl start crond.service
                  3⤵
                    PID:1587
                  • /usr/sbin/systemctl
                    systemctl start crond.service
                    3⤵
                      PID:1587
                    • /usr/bin/systemctl
                      systemctl start crond.service
                      3⤵
                        PID:1587
                      • /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:1594
                        • /usr/bin/systemctl
                          systemctl daemon-reload
                          4⤵
                          • Reads runtime system information
                          PID:1595
                        • /usr/bin/systemctl
                          systemctl enable quotaoff.service
                          4⤵
                            PID:1629
                          • /usr/bin/systemctl
                            systemctl start quotaoff.service
                            4⤵
                              PID:1663
                            • /usr/bin/journalctl
                              journalctl -xe --no-pager
                              4⤵
                              • Reads runtime system information
                              PID:1678
                          • /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:1679
                          • /bin/sh
                            /bin/sh -c "echo \"*/1 * * * * root /.mod \" >> /etc/crontab"
                            3⤵
                            • Creates/modifies Cron job
                            • Command and Scripting Interpreter: Unix Shell
                            PID:1682
                          • /usr/bin/renice
                            renice -20 1578
                            3⤵
                              PID:1683
                            • /usr/bin/mount
                              mount -o bind /tmp/ /proc/1578
                              3⤵
                                PID:1684
                              • /usr/sbin/service
                                service cron start
                                3⤵
                                  PID:1686
                                  • /usr/bin/basename
                                    basename /usr/sbin/service
                                    4⤵
                                      PID:1687
                                    • /usr/bin/basename
                                      basename /usr/sbin/service
                                      4⤵
                                        PID:1688
                                      • /usr/bin/sed
                                        sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                                        4⤵
                                        • Reads runtime system information
                                        PID:1691
                                      • /usr/bin/systemctl
                                        systemctl list-unit-files --full "--type=socket"
                                        4⤵
                                        • Reads runtime system information
                                        PID:1690
                                    • /usr/local/sbin/systemctl
                                      systemctl start cron.service
                                      3⤵
                                        PID:1686
                                      • /usr/local/bin/systemctl
                                        systemctl start cron.service
                                        3⤵
                                          PID:1686
                                        • /usr/sbin/systemctl
                                          systemctl start cron.service
                                          3⤵
                                            PID:1686
                                          • /usr/bin/systemctl
                                            systemctl start cron.service
                                            3⤵
                                              PID:1686
                                            • /usr/bin/systemctl
                                              systemctl start crond.service
                                              3⤵
                                                PID:1692
                                          • /etc/32676
                                            /etc/32676
                                            1⤵
                                            • Executes dropped EXE
                                            PID:1586
                                            • /usr/bin/sleep
                                              sleep 60
                                              2⤵
                                                PID:1588
                                              • /etc/opt.services.cfg
                                                /etc/opt.services.cfg
                                                2⤵
                                                • Executes dropped EXE
                                                • Enumerates kernel/hardware configuration
                                                PID:1720
                                                • /etc/opt.services.cfg
                                                  /etc/opt.services.cfg " "
                                                  3⤵
                                                  • Executes dropped EXE
                                                  • Enumerates kernel/hardware configuration
                                                  PID:1724
                                              • /usr/bin/sleep
                                                sleep 60
                                                2⤵
                                                  PID:1725
                                                • /etc/opt.services.cfg
                                                  /etc/opt.services.cfg
                                                  2⤵
                                                  • Executes dropped EXE
                                                  • Enumerates kernel/hardware configuration
                                                  PID:1743
                                                  • /etc/opt.services.cfg
                                                    /etc/opt.services.cfg " "
                                                    3⤵
                                                    • Executes dropped EXE
                                                    • Enumerates kernel/hardware configuration
                                                    PID:1747
                                                • /usr/bin/sleep
                                                  sleep 60
                                                  2⤵
                                                    PID:1748

                                                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

                                                  1.9MB

                                                  MD5

                                                  e55a695d2530b3fb5c80256f6036de29

                                                  SHA1

                                                  cbf9fb21338b161a6b5ab67425e8afbcf9bbcd93

                                                  SHA256

                                                  ce2944509d3936280343639c38ed5240f0a35c8d1dd63a00ce0eef1052325124

                                                  SHA512

                                                  a59fec7fe64abf676a4b40737eaf4b5824daf78c78324ef1e8b58114f81bbeda4edb281fab0582026dd8363314905d0259b20ac842f9016f4da8bf1dab0fc89d

                                                • /etc/.walk

                                                  Filesize

                                                  49B

                                                  MD5

                                                  ee57f6cb3b362d7140dc023687b4d959

                                                  SHA1

                                                  2c85632599f651984f0408b5d733b265fcf76ebc

                                                  SHA256

                                                  50e249e8740c366ad2c0b3835e0554ded413aeb995d2fd339e82b3d3c14bf155

                                                  SHA512

                                                  838628f79a2e91805df9df34fcf8d70c4a4b77bdb9e84149930a1ef45fd29d69e6ce5d96ce4cd56ed6e7e3d5e10d221b3ce41b6d8aeb658abd941c335ef9a578

                                                • /etc/.walk

                                                  Filesize

                                                  98B

                                                  MD5

                                                  831c33539ef5df68c1ee88d087dca211

                                                  SHA1

                                                  c5e582f85248a12ceb23ca059b66036523dec44f

                                                  SHA256

                                                  130fa7342378db9d67c7b7596ac7fc83356edc6d2741bdb555e48f88338c9ea1

                                                  SHA512

                                                  ff11bf8cdede01a9722bd08188bbfda81241b568d023f00504281191fa47dd66165dec97a104d63f0414234cb5e16d32f1b460411c3c9216e43055e71f3616fb

                                                • /etc/32676

                                                  Filesize

                                                  61B

                                                  MD5

                                                  47684525bfdf26f49fd1cf742b17c015

                                                  SHA1

                                                  c4ab14ba22420ff9acadfc698a38d0cd99e9fbfa

                                                  SHA256

                                                  b7ce294613dd2c237a4a50548bfcd5c14d166107f2d2e965499bc78695300d5b

                                                  SHA512

                                                  948f9c519ae9afe1c821c5d58da2e584e50356dabef597ccd408853a9038560b9fb1c5894900e2725b48977ffd49d18a439436bb4946e2164ac9fcf2a8637621

                                                • /etc/profile.d/gateway.sh

                                                  Filesize

                                                  5KB

                                                  MD5

                                                  716f713790b4e56c299c857a96fcad5b

                                                  SHA1

                                                  1e1f07ae0a69dafb5c3d67859d6729f96d207109

                                                  SHA256

                                                  8a9fe275a2d9d6b3643669c5096b44f08eca9adef36255987e111fab126c37b9

                                                  SHA512

                                                  7a5c67b96345929cdd986ddd87e749335f0045dea89bec0d3f50646e9a7b2fac6ae33b64bc026f34cef8fe43387323f520d1579e867380eecc535fe1165ed528

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

                                                  Filesize

                                                  186B

                                                  MD5

                                                  b02de6cd28cd922b18d9d93375a70d8b

                                                  SHA1

                                                  021426a5a2ff9edc80ba5936c94b37525538885e

                                                  SHA256

                                                  d8d8e5cd33aa3450cd74c63716a02f3dff39efef2836559f110bc93663b1380a

                                                  SHA512

                                                  db3fe03ad5e599e6c03aaec7bf1242f5509fbb624adb9afb7499e25487daef3f3f1c6babf51570b527a5ac5c9f4b079ae4cc53baa9497c0a121328bef8d04422