General

  • Target
    e73d0a5c7b43c91097089328a27d3fd95db015395c5ecd7b91d045e29a255d2b.elf
  • Size 5.1MB
  • Sample241105-e2y5yavbmb
  • SHA256 e73d0a5c7b43c91097089328a27d3fd95db015395c5ecd7b91d045e29a255d2b
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • kaiji

C2
  • 78789.dns.army:7850

Targets

    • Target
      e73d0a5c7b43c91097089328a27d3fd95db015395c5ecd7b91d045e29a255d2b.elf
    • Size 5.1MB
    • SHA256 e73d0a5c7b43c91097089328a27d3fd95db015395c5ecd7b91d045e29a255d2b
    • MD5 SHA1 SHA512 SSDEEP
    • Renames multiple (1004) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

    • 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