General

  • Target
    wj0s.x86_64.elf
  • Size 94KB
  • Sample260910-gbve6sgr31
  • SHA256 82550ff97d953cd7f4278b79f1b2ded0e985e19c0a09e2e3d846d8960a754609
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Targets

    • Target
      wj0s.x86_64.elf
    • Size 94KB
    • SHA256 82550ff97d953cd7f4278b79f1b2ded0e985e19c0a09e2e3d846d8960a754609
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Executes dropped EXE

    • Modifies PAM framework files

      Modifies Linux PAM framework files, possibly to intercept credentials.

    • Modifies Watchdog functionality

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

    • Modifies the /etc/hosts DNS resolution file

      Modifying the /etc/hosts name-resolution file changes IP routing, which can facilitate traffic hijacking or the blocking of (security update) endpoints.

    • 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.

    • Deletes log files

      Deletes log files on the system.

    • Enumerates active TCP sockets

      Gets active TCP sockets from /proc virtual filesystem.

    • Enumerates running processes

      Discovers information about currently running processes on the system

    • Modifies init.d

      Adds/modifies system service, likely for persistence.

    • Modifies rc script

      Adding/modifying system rc scripts is a common persistence mechanism.

    • Modifies systemd

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

    • Write file to user bin folder

    • Writes file to system bin folder

    • Modifies Bash startup script

    • Reads process memory

      Read the memory of a process through the /proc virtual filesystem. This can be used to steal credentials.

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

MITRE ATT&CK Enterprise v16

Tasks