Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    debian-9_armhf
  • resource
    debian9-armhf-20240729-en
  • resource tags

    arch:armhfimage:debian9-armhf-20240729-enkernel:4.9.0-13-armmp-lpaelocale:en-usos:debian-9-armhfsystem
  • submitted
    03-11-2024 02:55

General

  • Target

    668e2cdc076b620be68a4d5aa2ed14d2fa9b48b556f0e8f69548d8a972436155.elf

  • Size

    2.0MB

  • MD5

    639af202eb3c903183b8ae3d8ba4951e

  • SHA1

    78ad606c247165cb75c4e349d9be702517203224

  • SHA256

    668e2cdc076b620be68a4d5aa2ed14d2fa9b48b556f0e8f69548d8a972436155

  • SHA512

    1eb84b880900795da9bb834e88422c8a81bd83f7fb0dcdf090f8b178b21e486e0010126bd249c84cf2b2f6dcad3fc0597acad073b299512fba8f9f02ef0c4767

  • SSDEEP

    24576:J1rMILphWsdRm6vM7lUVJtq8wfe9OqbVgYQ3k48jtIMoG34RJnWVh1BPnjKqZdtX:JVfjmRMo2T1

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 17 IoCs

    Adds/modifies system service, likely for persistence.

  • Write file to user bin folder 2 IoCs
  • Modifies Bash startup script 2 TTPs 3 IoCs
  • Command and Scripting Interpreter: Unix Shell 1 TTPs 2 IoCs

    Execute scripts via Unix Shell.

  • Enumerates kernel/hardware configuration 1 TTPs 13 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/668e2cdc076b620be68a4d5aa2ed14d2fa9b48b556f0e8f69548d8a972436155.elf
    /tmp/668e2cdc076b620be68a4d5aa2ed14d2fa9b48b556f0e8f69548d8a972436155.elf
    1⤵
    • Enumerates kernel/hardware configuration
    PID:645
    • /tmp/668e2cdc076b620be68a4d5aa2ed14d2fa9b48b556f0e8f69548d8a972436155.elf
      /tmp/668e2cdc076b620be68a4d5aa2ed14d2fa9b48b556f0e8f69548d8a972436155.elf " "
      2⤵
      • Modifies Watchdog functionality
      • Creates/modifies environment variables
      • Modifies init.d
      • Write file to user bin folder
      • Modifies Bash startup script
      • Enumerates kernel/hardware configuration
      • Reads runtime system information
      PID:649
      • /bin/sh
        /bin/sh -c "/etc/32676&"
        3⤵
        • Command and Scripting Interpreter: Unix Shell
        PID:662
      • /usr/sbin/service
        service crond start
        3⤵
          PID:665
          • /usr/bin/basename
            basename /usr/sbin/service
            4⤵
              PID:667
            • /usr/bin/basename
              basename /usr/sbin/service
              4⤵
                PID:671
              • /bin/systemctl
                systemctl --quiet is-active multi-user.target
                4⤵
                • Enumerates kernel/hardware configuration
                • Reads runtime system information
                PID:673
              • /bin/systemctl
                systemctl list-unit-files --full "--type=socket"
                4⤵
                • Enumerates kernel/hardware configuration
                • Reads runtime system information
                PID:678
              • /bin/sed
                sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                4⤵
                • Reads runtime system information
                PID:679
            • /usr/local/sbin/systemctl
              systemctl "--job-mode=ignore-dependencies" start crond.service
              3⤵
                PID:665
              • /usr/local/bin/systemctl
                systemctl "--job-mode=ignore-dependencies" start crond.service
                3⤵
                  PID:665
                • /usr/sbin/systemctl
                  systemctl "--job-mode=ignore-dependencies" start crond.service
                  3⤵
                    PID:665
                  • /usr/bin/systemctl
                    systemctl "--job-mode=ignore-dependencies" start crond.service
                    3⤵
                      PID:665
                    • /sbin/systemctl
                      systemctl "--job-mode=ignore-dependencies" start crond.service
                      3⤵
                        PID:665
                      • /bin/systemctl
                        systemctl "--job-mode=ignore-dependencies" start crond.service
                        3⤵
                        • Enumerates kernel/hardware configuration
                        • Reads runtime system information
                        PID:665
                      • /bin/sh
                        /bin/sh -c "echo \"*/1 * * * * root /.mod \" >> /etc/crontab"
                        3⤵
                        • Creates/modifies Cron job
                        • Command and Scripting Interpreter: Unix Shell
                        PID:686
                      • /usr/bin/renice
                        renice -20 649
                        3⤵
                          PID:691
                        • /bin/mount
                          mount -o bind /tmp/ /proc/649
                          3⤵
                          • Reads runtime system information
                          PID:692
                        • /usr/sbin/service
                          service cron start
                          3⤵
                            PID:693
                            • /usr/bin/basename
                              basename /usr/sbin/service
                              4⤵
                                PID:694
                              • /usr/bin/basename
                                basename /usr/sbin/service
                                4⤵
                                  PID:695
                                • /bin/systemctl
                                  systemctl --quiet is-active multi-user.target
                                  4⤵
                                  • Enumerates kernel/hardware configuration
                                  • Reads runtime system information
                                  PID:696
                                • /bin/sed
                                  sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                                  4⤵
                                    PID:699
                                  • /bin/systemctl
                                    systemctl list-unit-files --full "--type=socket"
                                    4⤵
                                    • Enumerates kernel/hardware configuration
                                    • Reads runtime system information
                                    PID:698
                                • /usr/local/sbin/systemctl
                                  systemctl "--job-mode=ignore-dependencies" start cron.service
                                  3⤵
                                    PID:693
                                  • /usr/local/bin/systemctl
                                    systemctl "--job-mode=ignore-dependencies" start cron.service
                                    3⤵
                                      PID:693
                                    • /usr/sbin/systemctl
                                      systemctl "--job-mode=ignore-dependencies" start cron.service
                                      3⤵
                                        PID:693
                                      • /usr/bin/systemctl
                                        systemctl "--job-mode=ignore-dependencies" start cron.service
                                        3⤵
                                          PID:693
                                        • /sbin/systemctl
                                          systemctl "--job-mode=ignore-dependencies" start cron.service
                                          3⤵
                                            PID:693
                                          • /bin/systemctl
                                            systemctl "--job-mode=ignore-dependencies" start cron.service
                                            3⤵
                                            • Enumerates kernel/hardware configuration
                                            • Reads runtime system information
                                            PID:693
                                          • /bin/systemctl
                                            systemctl start crond.service
                                            3⤵
                                            • Enumerates kernel/hardware configuration
                                            • Reads runtime system information
                                            PID:700
                                      • /etc/32676
                                        /etc/32676
                                        1⤵
                                        • Executes dropped EXE
                                        PID:664
                                        • /bin/sleep
                                          sleep 60
                                          2⤵
                                            PID:669
                                          • /etc/opt.services.cfg
                                            /etc/opt.services.cfg
                                            2⤵
                                            • Executes dropped EXE
                                            • Enumerates kernel/hardware configuration
                                            PID:803
                                            • /etc/opt.services.cfg
                                              /etc/opt.services.cfg " "
                                              3⤵
                                              • Executes dropped EXE
                                              • Enumerates kernel/hardware configuration
                                              PID:807
                                          • /bin/sleep
                                            sleep 60
                                            2⤵
                                              PID:808
                                            • /etc/opt.services.cfg
                                              /etc/opt.services.cfg
                                              2⤵
                                              • Executes dropped EXE
                                              • Enumerates kernel/hardware configuration
                                              PID:835
                                              • /etc/opt.services.cfg
                                                /etc/opt.services.cfg " "
                                                3⤵
                                                • Executes dropped EXE
                                                • Enumerates kernel/hardware configuration
                                                PID:839
                                            • /bin/sleep
                                              sleep 60
                                              2⤵
                                                PID:840

                                            Network

                                            MITRE ATT&CK Enterprise v15

                                            Replay Monitor

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                                            Downloads

                                            • /.mod

                                              Filesize

                                              34B

                                              MD5

                                              f5a3713282e43c200f30342f5ff5e2ea

                                              SHA1

                                              2b2ce1a207e2b691a074c6f78f71c4785aae426a

                                              SHA256

                                              6ab64e727571458d4884fb2fe82c27c467db0699cb8f648b3f0217c35d2b7511

                                              SHA512

                                              5bcb8cd360409147a486755f90e0cdd97183af02ce8de5135b7c6a8a010deb9ef12dcd5ee9a2a8fd2e159347f68e72d6b7fd75e943b4fcd928d7a74b97476013

                                            • /etc/.walk

                                              Filesize

                                              41B

                                              MD5

                                              e53a145554ba759de7a70cae1eff17a4

                                              SHA1

                                              19cfb111943c612e0368f16e77e40767d2fc4e23

                                              SHA256

                                              6eacc74d627f755c441d78c516405f124e8c025e9e145ba5c00df3249153805b

                                              SHA512

                                              5d64da46fd8c6364164906840334dec95f867bafe54373bb29f821fdf7979510522d75a6086871206c2ae5afc380ccff7068fe2185ce1f32254ea2984e6daec5

                                            • /etc/.walk

                                              Filesize

                                              90B

                                              MD5

                                              8eb99ad87bc72d7f86d7cc31369e06ac

                                              SHA1

                                              7a02c8fa1a938fa47fc4abb20c5bad7db8eb3d11

                                              SHA256

                                              162d763122b4e5140cb3a1d1e79cfd6a20c15a7f0f01507804850fc15b8673de

                                              SHA512

                                              825cb841fc495f20db960f0e5f50b2a5e19c6f89dfa6b1aca4a892dd691848b4c41888937be73660b77a03a72043330d6ee145f5800cd23dac89415e4725f3ad

                                            • /etc/32676

                                              Filesize

                                              61B

                                              MD5

                                              47684525bfdf26f49fd1cf742b17c015

                                              SHA1

                                              c4ab14ba22420ff9acadfc698a38d0cd99e9fbfa

                                              SHA256

                                              b7ce294613dd2c237a4a50548bfcd5c14d166107f2d2e965499bc78695300d5b

                                              SHA512

                                              948f9c519ae9afe1c821c5d58da2e584e50356dabef597ccd408853a9038560b9fb1c5894900e2725b48977ffd49d18a439436bb4946e2164ac9fcf2a8637621

                                            • /etc/opt.services.cfg

                                              Filesize

                                              2.0MB

                                              MD5

                                              639af202eb3c903183b8ae3d8ba4951e

                                              SHA1

                                              78ad606c247165cb75c4e349d9be702517203224

                                              SHA256

                                              668e2cdc076b620be68a4d5aa2ed14d2fa9b48b556f0e8f69548d8a972436155

                                              SHA512

                                              1eb84b880900795da9bb834e88422c8a81bd83f7fb0dcdf090f8b178b21e486e0010126bd249c84cf2b2f6dcad3fc0597acad073b299512fba8f9f02ef0c4767

                                            • /etc/profile.d/gateway.sh

                                              Filesize

                                              969B

                                              MD5

                                              148912f86cf0801839ce4fb80a7da3cb

                                              SHA1

                                              aa495d59ccc2ad297316a35f917156cb79d48c65

                                              SHA256

                                              4b9112e2c69d9b1ab31aae2255a42cefd38a500ca42b3627ae2a9ffa733e0276

                                              SHA512

                                              44e101ef4163a3e973f8c0bbcf4bb8744a64b791d6e4b71d208ab3294be4510dc8905692fbb460296d363bcc5786ccf390c859f8ab3e5b29d227fc41a42d4c45

                                            • /usr/bin/include/find

                                              Filesize

                                              134KB

                                              MD5

                                              138a27d6fe52fa1132760a4fa48922e0

                                              SHA1

                                              e0250e4d7bf33a5a1064344224148b889cb15138

                                              SHA256

                                              81a10dad907b23521461bd3fc83c2cedb2218933a328d9a05e3c9f6a9a1d42aa

                                              SHA512

                                              ee0078afad63fc2aaffdebb7127d1c7d4459287fee75358f57c82d397c39b7bf64338fb6996dfb1747cd9a896d714b3c76f0948727be91550f1affa1c0298a9e