General

  • Target

    50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90

  • Size

    6.2MB

  • Sample

    220310-xd19haabb6

  • MD5

    942b78bcd8a5aa6d10436832b1260671

  • SHA1

    e35e87e58f94e304dd0b97e9b85c6cb30146978d

  • SHA256

    50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90

  • SHA512

    89baba3a305d1d6969b68e4f63c294a861fc755f65ac6d0f5a67f7d6b7aa26cd852f78ce0441af489a70991a9cd0887388687d89efd0f1fb95fb316490d030e3

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Windows Security Notification

C2

minecraftgaming009-61323.portmap.io:61323

Mutex

VNM_MUTEX_c2q7y2ayYutZ2XaYe7

Attributes
  • encryption_key

    1oSvdU99XhcwnNYl3rB8

  • install_name

    Windows Security Notification.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows Security Notification

  • subdirectory

    SubDir

Extracted

Family

quasar

Version

1.4.0.0

Botnet

Steam

C2

Minecrafthosting6969-35389.portmap.io:35389

Mutex

EAojkiVMQ0sDtyACyi

Attributes
  • encryption_key

    P5xHRD8P5ncR2T1uRpgp

  • install_name

    Steam.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Steam

  • subdirectory

    SubDir

Targets

    • Target

      50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90

    • Size

      6.2MB

    • MD5

      942b78bcd8a5aa6d10436832b1260671

    • SHA1

      e35e87e58f94e304dd0b97e9b85c6cb30146978d

    • SHA256

      50b2e0afea299c4e8d079367ef95afeb700f9dc0dc05eee018ed2348ef38dc90

    • SHA512

      89baba3a305d1d6969b68e4f63c294a861fc755f65ac6d0f5a67f7d6b7aa26cd852f78ce0441af489a70991a9cd0887388687d89efd0f1fb95fb316490d030e3

    • 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

    • Modifies security service

    • Quasar Payload

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • VenomRAT

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

    • NirSoft WebBrowserPassView

      Password recovery tool for various web browsers

    • Nirsoft

    • Executes dropped EXE

    • Checks computer location settings

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

    • Deletes itself

    • Drops startup file

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Windows security modification

    • Adds Run key to start application

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

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

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v6

Tasks