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General

  • Target

    Setup.exe

  • Size

    2.0MB

  • Sample

    240708-3agzcathlk

  • MD5

    e3d5b216c73c93fa570be1776d81da90

  • SHA1

    dc66ddc93ed23831977a6dcf08a7b27786e0d169

  • SHA256

    b27f2ffda5054c513a5f0dc3bbdc067c78a82f2be201334703f1b45e477cd067

  • SHA512

    45a1d097a9e3f164c8b503f4aee0d3afcb747a57f0058c6f0f243f01739a7ecb5636095a72b04a38c0dd6cb0c3f8c12ccafdfd0051dc81f99911f657f9236669

  • SSDEEP

    49152:KDjlabwz9ZDjlabwz9F62WMAQaPXvvvELJ8LPel0Pk:6qwvqwhBAh/vvYJ4PLM

Malware Config

Extracted

Family

vidar

C2

https://t.me/bu77un

https://steamcommunity.com/profiles/76561199730044335

Attributes
  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.1) Gecko/20100101 Firefox/128.1

Targets

    • Target

      Setup.exe

    • Size

      2.0MB

    • MD5

      e3d5b216c73c93fa570be1776d81da90

    • SHA1

      dc66ddc93ed23831977a6dcf08a7b27786e0d169

    • SHA256

      b27f2ffda5054c513a5f0dc3bbdc067c78a82f2be201334703f1b45e477cd067

    • SHA512

      45a1d097a9e3f164c8b503f4aee0d3afcb747a57f0058c6f0f243f01739a7ecb5636095a72b04a38c0dd6cb0c3f8c12ccafdfd0051dc81f99911f657f9236669

    • SSDEEP

      49152:KDjlabwz9ZDjlabwz9F62WMAQaPXvvvELJ8LPel0Pk:6qwvqwhBAh/vvYJ4PLM

    • Detect Vidar Stealer

    • Stealc

      Stealc is an infostealer written in C++.

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • Reads user/profile data of web browsers

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

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Checks installed software on the system

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

    • Legitimate hosting services abused for malware hosting/C2

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v15

Tasks