General

  • Target
    33C2ADEBFE2C3ACEDFB34FFFF8151B7D.exe
  • Size 72.2MB
  • Sample241209-weld1a1jer
  • SHA256 773e13fffd0842e717ce55e2a678da37123c55186f9c92460c671261b1654ffd
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • quasar

Version
  • 1.4.1

Botnet
  • Office04

C2
  • 167.71.56.116:22269

Mutex
  • 3470ac31-30aa-4cf6-ab0a-1ed0dd64656f

Attributes
  • encryption_key

    33E08519CDBEF59C54E93052681A76D1969C659E

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Targets

    • Target
      33C2ADEBFE2C3ACEDFB34FFFF8151B7D.exe
    • Size 72.2MB
    • SHA256 773e13fffd0842e717ce55e2a678da37123c55186f9c92460c671261b1654ffd
    • MD5 SHA1 SHA512 SSDEEP
    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • Downloads MZ/PE file

    • Event Triggered Execution: Image File Execution Options Injection

    • ACProtect 1.3x - 1.4x DLL software

      Detects file using ACProtect software.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Event Triggered Execution: Component Object Model Hijacking

      Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

    • Executes dropped EXE

    • Loads dropped DLL

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Drops desktop.ini file(s)

    • Checks system information in the registry

      System information is often read in order to detect sandboxing environments.

    • Drops file in System32 directory

    • UPX packed file

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

MITRE ATT&CK Enterprise v15

Tasks