General

  • Target
    x09374a17895bc5b543dcb5c0cf465b6932219df3362d64e8dd1e3299c0a3e196.exe
  • Size 1.3MB
  • Sample260524-lstmesds7v
  • SHA256 09374a17895bc5b543dcb5c0cf465b6932219df3362d64e8dd1e3299c0a3e196
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • quasar

Attributes
  • encryption_key

    59E1E223F163FCF8B53659140D2DC53EA09C924C

  • key_salt

    5a23f8394640cb9e40658446a04c0bbae82dc93d0470e1b2a406a90fd2520382

  • log_directory

    �?�03

  • reconnect_delay

    3000

Targets

    • Target
      x09374a17895bc5b543dcb5c0cf465b6932219df3362d64e8dd1e3299c0a3e196.exe
    • Size 1.3MB
    • SHA256 09374a17895bc5b543dcb5c0cf465b6932219df3362d64e8dd1e3299c0a3e196
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Async RAT payload

    • Detects MilleniumRAT stealer

    • Family: AsyncRat

      AsyncRAT is designed to remotely monitor and control other computers written in C#.

    • Family: MilleniumRat

      MilleniumRat is a remote access trojan written in C#.

    • Family: Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Family: StormKitty

      StormKitty is an open source info stealer written in C#.

    • Family: VenomRAT

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

    • Quasar payload

    • StormKitty payload

    • VenomRAT

      Detects VenomRAT.

    • 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

    • Uses browser remote debugging

      Can be used control the browser and steal sensitive information such as credentials and session cookies.

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Reads user/profile data of web browsers

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

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Contacts third-party web service commonly abused for C2

      Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • 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

    • SmartAssembly .NET packer

      Detects SmartAssembly .NET packer.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v16

Tasks