General

  • Target
    linux_mipsel.elf
  • Size 2.2MB
  • Sample261022-vm7rjasvhx
  • SHA256 88edf73fc2a993efe860e30bc475171d2559bc5106c37b6ee9fc22a0ce7b66ef
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Targets

    • Target
      linux_mipsel.elf
    • Size 2.2MB
    • SHA256 88edf73fc2a993efe860e30bc475171d2559bc5106c37b6ee9fc22a0ce7b66ef
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • 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.

    • Disables SELinux

      Disables SELinux security module.

    • 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 v16

Tasks