General

  • Target

    4bb4ff4b1fa6c7e122557d8a55826242.bin

  • Size

    22.9MB

  • Sample

    240514-bzpa6sdh2t

  • MD5

    a405008b6ea5c1d821ab8e9702453413

  • SHA1

    f147776885e37924814a77e45c07e7e4a155a1c1

  • SHA256

    2c5e255cb479124aa195cda308d774518bf0a384858ccd0b72aac17baa761a05

  • SHA512

    f46864311fee62f120b6e04a0cdad4be57794b2825e8bbc3359253548220d785340c1465ce66755d8a83296a2a0341879846f58b9a825e1b876f4408fa6ea79a

  • SSDEEP

    393216:vktMHnDnA+bkb08yjRM+lKVGHJ8lC3GTcyDpkjjOW85+wYEAa37mK+YmupbEbSx:vktMHjA+/BzlKVdFv1UiYIAa37mK+Ytl

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Webhook

C2

bardu3662.duckdns.org:9733

Mutex

afa58199-2aae-4e08-8ef4-8e4ef39bc0aa

Attributes
  • encryption_key

    080342EF5ED2B5D16317695CC4327BF2FFC034AA

  • install_name

    RuntimeBroker.exe

  • log_directory

    Logs

  • reconnect_delay

    1000

  • startup_key

    Update

  • subdirectory

    ApplicationFrameHost

Targets

    • Target

      a45c739b9f551d8633053381950f20a617ae2fe9c1d96d4f433d8ffa3015fb5e.exe

    • Size

      24.6MB

    • MD5

      4bb4ff4b1fa6c7e122557d8a55826242

    • SHA1

      241427d58cc7787fd24536821080244f344ddc74

    • SHA256

      a45c739b9f551d8633053381950f20a617ae2fe9c1d96d4f433d8ffa3015fb5e

    • SHA512

      4b6e380061a3f05583ad2e14e791b8c61d237e92a45d0abbadcc24fbe7aae3b63c18a02d665a5e2d8cd0e05dee29779f24658f585d9f1272e4fd9bc0532fae16

    • SSDEEP

      786432:ZXiuaHp1WxVMCLvYEpd3hA/IlF1ZAhfk:vaHfsVDw0DAA31ZAhf

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Creates new service(s)

    • Drops file in Drivers directory

    • Stops running service(s)

    • 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.

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • 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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks