General

  • Target

    linux_386.elf

  • Size

    5.0MB

  • Sample

    241027-ybsp1sypgx

  • MD5

    4b53bd2b79fc8f18d1a5e591358bcfb9

  • SHA1

    4cde3dce676fb3a040472458c807b945d8ffefd8

  • SHA256

    30523d9f0e7898f89538e2babd0e305b4e25b06521418e299e4e983c8597b558

  • SHA512

    f5c2b671a899551f1c0f447c528d6c3c45933dce057cf16b5fea07c07dcb9b450698b1a36395852ae1822e2e22c61260b490ba6a469540b33da4704df783aa79

  • SSDEEP

    49152:E33d0lGt6UHcFL7Rn2o03wiEhiDmzzd/9sARlBs/00Cpfx9a9uNHp9hW16klbU6V:E33GlbU8FwmzzRDZ9moqRV

Malware Config

Extracted

Family

kaiji

C2

154.12.82.11:808

Targets

    • Target

      linux_386.elf

    • Size

      5.0MB

    • MD5

      4b53bd2b79fc8f18d1a5e591358bcfb9

    • SHA1

      4cde3dce676fb3a040472458c807b945d8ffefd8

    • SHA256

      30523d9f0e7898f89538e2babd0e305b4e25b06521418e299e4e983c8597b558

    • SHA512

      f5c2b671a899551f1c0f447c528d6c3c45933dce057cf16b5fea07c07dcb9b450698b1a36395852ae1822e2e22c61260b490ba6a469540b33da4704df783aa79

    • SSDEEP

      49152:E33d0lGt6UHcFL7Rn2o03wiEhiDmzzd/9sARlBs/00Cpfx9a9uNHp9hW16klbU6V:E33GlbU8FwmzzRDZ9moqRV

    • Kaiji

      Kaiji payload

    • Kaiji family

    • kaiji_chaosbot

      Chaos-variant payload

    • Executes dropped EXE

    • Modifies Watchdog functionality

      Malware like Mirai modifies the Watchdog to prevent it restarting an infected system.

    • Creates/modifies Cron job

      Cron allows running tasks on a schedule, and is commonly used for malware persistence.

    • Creates/modifies environment variables

      Creating/modifying environment variables is a common persistence mechanism.

    • Enumerates running processes

      Discovers information about currently running processes on the system

    • Modifies init.d

      Adds/modifies system service, likely for persistence.

    • Modifies systemd

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

    • Write file to user bin folder

    • Modifies Bash startup script

MITRE ATT&CK Enterprise v15

Tasks