General

  • Target

    17e6bffaff1ea223913deb1bc78e74ae.exe

  • Size

    534KB

  • Sample

    221015-g3q7tsfcd3

  • MD5

    17e6bffaff1ea223913deb1bc78e74ae

  • SHA1

    67daf17f3c8f6d2169b24f9a3698921991bbba2f

  • SHA256

    af1d446bb3abc47b5eacb7a00ebb1992be1c464cac5b0e4283b12f0500c3ad4e

  • SHA512

    72086bdd67ce5c778a625d37d7069200747b70193742afee986ec3d58b3a4a5c95b206c91997faf5d3e46e7ab379955db5f033a8b10a4a4899ff6e6068c60ab6

  • SSDEEP

    6144:l8fGABIgrx8kFYLTiMkbMaOcXL/Tb88ASigvCcD+6cfsfiTDpxUKl3Gy3V8/GV0S:EPx7FYPiMNA/flvCcqTsfGpxLl+u

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

asdf

C2

checkme12.freeddns.org:1604

Mutex

VNM_MUTEX_yidaALoSEROfTPWHwX

Attributes
  • encryption_key

    TbfVFQWqb0uiZoBjJ9E9

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Venom Client Startup

  • subdirectory

    UPX

Targets

    • Target

      17e6bffaff1ea223913deb1bc78e74ae.exe

    • Size

      534KB

    • MD5

      17e6bffaff1ea223913deb1bc78e74ae

    • SHA1

      67daf17f3c8f6d2169b24f9a3698921991bbba2f

    • SHA256

      af1d446bb3abc47b5eacb7a00ebb1992be1c464cac5b0e4283b12f0500c3ad4e

    • SHA512

      72086bdd67ce5c778a625d37d7069200747b70193742afee986ec3d58b3a4a5c95b206c91997faf5d3e46e7ab379955db5f033a8b10a4a4899ff6e6068c60ab6

    • SSDEEP

      6144:l8fGABIgrx8kFYLTiMkbMaOcXL/Tb88ASigvCcD+6cfsfiTDpxUKl3Gy3V8/GV0S:EPx7FYPiMNA/flvCcqTsfGpxLl+u

    • 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.

    • 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