General

  • Target

    e14fe9800b600ce61b06794233aa47d6fbbc20d18dbb1e531c5deaac995bbca8

  • Size

    590KB

  • Sample

    221130-q43fxsfa84

  • MD5

    f7d70adb404cf63562d6541fce16ee94

  • SHA1

    7c855ae562c54c6747c682f9403ff902308deeb1

  • SHA256

    e14fe9800b600ce61b06794233aa47d6fbbc20d18dbb1e531c5deaac995bbca8

  • SHA512

    aed0a69aa45018197f04eec259ab4954f0ecd6f0e309a745346282cc46efd4e6567f920a3cfa39326082abff40de6ad932150ae5f6207e1a580d87343410d519

  • SSDEEP

    6144:kU9/iRCAm9wyitWVSIyIXQR3YQJrjYPUotecWo7vMyYp5lQj64cmX3Hrv9Otawza:i3ynm3RsPj7WYUxp+TvotLzAFLBz8LS

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

RAT

C2

23.105.131.178:7812

Mutex

VNM_MUTEX_gdy9bWxR0te3WgTRnI

Attributes
  • encryption_key

    MDXzdQumRqZGIeya7nG9

  • install_name

    Windows Defender Security.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows Update

  • subdirectory

    Microsoft

Targets

    • Target

      e14fe9800b600ce61b06794233aa47d6fbbc20d18dbb1e531c5deaac995bbca8

    • Size

      590KB

    • MD5

      f7d70adb404cf63562d6541fce16ee94

    • SHA1

      7c855ae562c54c6747c682f9403ff902308deeb1

    • SHA256

      e14fe9800b600ce61b06794233aa47d6fbbc20d18dbb1e531c5deaac995bbca8

    • SHA512

      aed0a69aa45018197f04eec259ab4954f0ecd6f0e309a745346282cc46efd4e6567f920a3cfa39326082abff40de6ad932150ae5f6207e1a580d87343410d519

    • SSDEEP

      6144:kU9/iRCAm9wyitWVSIyIXQR3YQJrjYPUotecWo7vMyYp5lQj64cmX3Hrv9Otawza:i3ynm3RsPj7WYUxp+TvotLzAFLBz8LS

    • 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

    • Adds Run key to start application

    • 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