General

  • Target

    f1946c208e4a8f7428f97e8e40f31ffa95885b61571dc4ab9ba6a3356336fc12

  • Size

    12.8MB

  • Sample

    221130-v3arqsah45

  • MD5

    1c1cd3ee6e73a4e599c7c32bae300b05

  • SHA1

    dd22b9c9531efdecd80d37b01254e96728ef26c3

  • SHA256

    f1946c208e4a8f7428f97e8e40f31ffa95885b61571dc4ab9ba6a3356336fc12

  • SHA512

    484ab45694f4789a8f385dd6346c2711d8b79368760819065592163f763a8724c91993fbc0bfbf58ce0c1d0f7d9132f9b59a99645790e4e68ece6650b99cd037

  • SSDEEP

    393216:IY/d0T2My8oDotr3LItcM4epPOgmYQbml1ay:IYeqvE1Sd/WmSy

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

greedens

C2

127.0.0.1:4782

Mutex

VNM_MUTEX_7DOOh0yZCLxX4Y4Ltu

Attributes
  • encryption_key

    ZSBFYPSY9jJS688RgNV6

  • install_name

    $77setup.exe

  • log_directory

    gameboard

  • reconnect_delay

    3000

  • startup_key

    drivers

  • subdirectory

    $77

Targets

    • Target

      f1946c208e4a8f7428f97e8e40f31ffa95885b61571dc4ab9ba6a3356336fc12

    • Size

      12.8MB

    • MD5

      1c1cd3ee6e73a4e599c7c32bae300b05

    • SHA1

      dd22b9c9531efdecd80d37b01254e96728ef26c3

    • SHA256

      f1946c208e4a8f7428f97e8e40f31ffa95885b61571dc4ab9ba6a3356336fc12

    • SHA512

      484ab45694f4789a8f385dd6346c2711d8b79368760819065592163f763a8724c91993fbc0bfbf58ce0c1d0f7d9132f9b59a99645790e4e68ece6650b99cd037

    • SSDEEP

      393216:IY/d0T2My8oDotr3LItcM4epPOgmYQbml1ay:IYeqvE1Sd/WmSy

    • 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.

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Executes dropped EXE

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Deletes itself

    • Loads dropped DLL

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Windows security modification

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • 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

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v6

Tasks