General

  • Target

    https://www.upload.ee/files/16341532/Winlocker_Builder_v0.6.exe.html

  • Sample

    240302-af8p2afc6z

Malware Config

Extracted

Family

asyncrat

Botnet

40

C2

authority-amazon.gl.at.ply.gg:41414

Mutex

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Attributes
  • delay

    1

  • install

    true

  • install_file

    svchost.exe

  • install_folder

    %AppData%

aes.plain

Targets

    • Target

      https://www.upload.ee/files/16341532/Winlocker_Builder_v0.6.exe.html

    • AsyncRat

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

    • Async RAT payload

    • Renames multiple (3063) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Executes dropped EXE

    • Reads user/profile data of web browsers

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

    • Sets desktop wallpaper using registry

MITRE ATT&CK Enterprise v15

Tasks