General

  • Target

    d5f6dbe3d6f5644a77d7a3971d9dd17caec494ced43ffc535473b285b0f1507e

  • Size

    1.0MB

  • Sample

    230129-v3nzcsha2x

  • MD5

    d7ddd317f0382a2200832312449a20cd

  • SHA1

    bd3710cff6322c6a372db549b637c32e383f05cc

  • SHA256

    d5f6dbe3d6f5644a77d7a3971d9dd17caec494ced43ffc535473b285b0f1507e

  • SHA512

    c3936a1943575b0bb9dfdf8fef0d9705fc08c275260ce8199b7ff13213b72173565e7c1a4dfd47bd4a5a592ce10749ff1dafe73ba0053c9bd8f7a8cee495407d

  • SSDEEP

    24576:WcvkT1s+3Z3aGWqKg0Ogj1OLHd+JwbMFdt6ATCRcaahwKHGaTKBupdl:hvkTq+3Z3ZWGsSHd+J+MFTsRcXnHGmKm

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Office04

C2

127.0.0.1:4782

rat94522.ddnsking.com:4000

Mutex

VNM_MUTEX_c2q7y2ayYutZ2XaYe7

Attributes
  • encryption_key

    WIwQFd2V7FhUXFH7QX71

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Venom Client Startup

  • subdirectory

    SubDir

Targets

    • Target

      d5f6dbe3d6f5644a77d7a3971d9dd17caec494ced43ffc535473b285b0f1507e

    • Size

      1.0MB

    • MD5

      d7ddd317f0382a2200832312449a20cd

    • SHA1

      bd3710cff6322c6a372db549b637c32e383f05cc

    • SHA256

      d5f6dbe3d6f5644a77d7a3971d9dd17caec494ced43ffc535473b285b0f1507e

    • SHA512

      c3936a1943575b0bb9dfdf8fef0d9705fc08c275260ce8199b7ff13213b72173565e7c1a4dfd47bd4a5a592ce10749ff1dafe73ba0053c9bd8f7a8cee495407d

    • SSDEEP

      24576:WcvkT1s+3Z3aGWqKg0Ogj1OLHd+JwbMFdt6ATCRcaahwKHGaTKBupdl:hvkTq+3Z3ZWGsSHd+J+MFTsRcXnHGmKm

    • Contains code to disable Windows Defender

      A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

    • Modifies Windows Defender Real-time Protection settings

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • VenomRAT

      VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.

    • Executes dropped EXE

    • Checks computer location settings

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

    • Deletes itself

    • Loads dropped DLL

    • Windows security modification

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

MITRE ATT&CK Enterprise v6

Tasks