General

  • Target

    3295138274c034c16522257d6c18f225.exe

  • Size

    879KB

  • Sample

    220728-hlzcjsdfcj

  • MD5

    3295138274c034c16522257d6c18f225

  • SHA1

    6f93c0800221d86ec8de5636195383f91cb9a336

  • SHA256

    c063f14a72b49e90fe7862e4402540c2227abf2f063c9a8f63af90d4a6ab5e5b

  • SHA512

    7fb76b1bd0ec1d7e631c44d9cb82f06c6f2145b9a7797c5c8b18f3752bf18daec6ba57802bd178f630bcb9f9f20fc4486568a92e474d6499366e57f3e5bc81a3

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Bomboclat

C2

185.236.78.58:4782

Mutex

VNM_MUTEX_mtYiaCcGzveD5dsvgE

Attributes
  • encryption_key

    1WEWg6889GqBWLC1XKxQ

  • install_name

    WndowsSecurityUpdate.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Wndows Dfender Update Startup

  • subdirectory

    SubDir

Targets

    • Target

      3295138274c034c16522257d6c18f225.exe

    • Size

      879KB

    • MD5

      3295138274c034c16522257d6c18f225

    • SHA1

      6f93c0800221d86ec8de5636195383f91cb9a336

    • SHA256

      c063f14a72b49e90fe7862e4402540c2227abf2f063c9a8f63af90d4a6ab5e5b

    • SHA512

      7fb76b1bd0ec1d7e631c44d9cb82f06c6f2145b9a7797c5c8b18f3752bf18daec6ba57802bd178f630bcb9f9f20fc4486568a92e474d6499366e57f3e5bc81a3

    • 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.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks