General

  • Target
    Nowe zamówienie - 0072291855.pdf (243KB).com.exe
  • Size 3.7MB
  • Sample241203-p8nb5awngx
  • SHA256 e14c8cd3613b5d94cd5ca407fd329b61954add690c779edbd41b362d035f7879
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • quasar

Version
  • 1.4.1

Botnet
  • JEKWU

C2
  • Zyg.ydns.eu:5829

  • Opy.ydns.eu:5829

Mutex
  • 9c58b2ba-07eb-415a-b48b-21bbb68d32285e

Attributes
  • encryption_key

    C5B555A83D127A9553D4FB1FCECB35CE8E91A447

  • install_name

    outlooks.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Outlooks

  • subdirectory

    WindowsUpdates

Targets

    • Target
      Nowe zamówienie - 0072291855.pdf (243KB).com.exe
    • Size 3.7MB
    • SHA256 e14c8cd3613b5d94cd5ca407fd329b61954add690c779edbd41b362d035f7879
    • MD5 SHA1 SHA512 SSDEEP
    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks