General

  • Target

    https://mega.nz/file/Z09FHCqQ#oKEk_Od_s85u61Db6ftPGH22-pL6t1UTyAUk3Tk6AAs

  • Sample

    240717-drw26awfmc

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Steam

C2

20.ip.gl.ply.gg:55257

Mutex

15d4edb7-40c0-4a95-9dc8-8fe93071bce0

Attributes
  • encryption_key

    F1B995FFCFBEAA3218870A13F82413DC65D82218

  • install_name

    Steam.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    SteamClient

  • subdirectory

    %appdata%

Targets

    • Target

      https://mega.nz/file/Z09FHCqQ#oKEk_Od_s85u61Db6ftPGH22-pL6t1UTyAUk3Tk6AAs

    • Detect Umbral payload

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • Umbral

      Umbral stealer is an opensource moduler stealer written in C#.

    • Command and Scripting Interpreter: PowerShell

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

    • Downloads MZ/PE file

    • 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.

    • Hide Artifacts: Hidden Files and Directories

MITRE ATT&CK Enterprise v15

Tasks