General

  • Target

    817bc1c885e148f29dde2def8caa7f8952fefe02f94c8e2e5aa159e989fc5913

  • Size

    1.7MB

  • Sample

    240610-3bwtwsvgkn

  • MD5

    a1fb85fb4c19f0e923f2ce279e1353fe

  • SHA1

    955d4b8d94f2d1a0aa58aabe6e9e5cb78b70c5a5

  • SHA256

    817bc1c885e148f29dde2def8caa7f8952fefe02f94c8e2e5aa159e989fc5913

  • SHA512

    4bc9e5d03bc89d0bccd308280a660583394f2b1df3843c63652396d4422c740f693b8015aa512911c56975bb85a005f5f79ead7c1a9b76650399224dedaaba5e

  • SSDEEP

    24576:JoZYQkmdrf+4UfMxVVtes12FxwojKr98YGeGG9iH:JPYxtUkxVVChjHZQsH

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/r8z0l

https://steamcommunity.com/profiles/76561199698764354

Attributes
  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Targets

    • Target

      817bc1c885e148f29dde2def8caa7f8952fefe02f94c8e2e5aa159e989fc5913

    • Size

      1.7MB

    • MD5

      a1fb85fb4c19f0e923f2ce279e1353fe

    • SHA1

      955d4b8d94f2d1a0aa58aabe6e9e5cb78b70c5a5

    • SHA256

      817bc1c885e148f29dde2def8caa7f8952fefe02f94c8e2e5aa159e989fc5913

    • SHA512

      4bc9e5d03bc89d0bccd308280a660583394f2b1df3843c63652396d4422c740f693b8015aa512911c56975bb85a005f5f79ead7c1a9b76650399224dedaaba5e

    • SSDEEP

      24576:JoZYQkmdrf+4UfMxVVtes12FxwojKr98YGeGG9iH:JPYxtUkxVVChjHZQsH

    • 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

    • 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.

    • 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.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks