General

  • Target

    d81acbd7f77be8c59fd8848543dda8e7e5d9d1f724d4fdc349d57172f2ef39dd

  • Size

    2.4MB

  • Sample

    240531-3sw6zsaa7s

  • MD5

    23698732cf5c94f1a49e99663c8e8a4d

  • SHA1

    88c951129b821c73904cacca7f9b5d03929bef8f

  • SHA256

    d81acbd7f77be8c59fd8848543dda8e7e5d9d1f724d4fdc349d57172f2ef39dd

  • SHA512

    8ae521e93eb983dc9c42dd3b39ce98bd6256c73daf68fe5d54857eaa3f5ba3022be93cdb010bc22aed973de04b88482b32c20bbd57c41e3aed83b3475f3df72b

  • SSDEEP

    49152:wQc81KnB/a/hNT/dBYa8aesY3Ot4N7G/:wDta/hNT/dBn0etD/

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/ta904ek

https://steamcommunity.com/profiles/76561199695752269

Attributes
  • user_agent

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

Targets

    • Target

      d81acbd7f77be8c59fd8848543dda8e7e5d9d1f724d4fdc349d57172f2ef39dd

    • Size

      2.4MB

    • MD5

      23698732cf5c94f1a49e99663c8e8a4d

    • SHA1

      88c951129b821c73904cacca7f9b5d03929bef8f

    • SHA256

      d81acbd7f77be8c59fd8848543dda8e7e5d9d1f724d4fdc349d57172f2ef39dd

    • SHA512

      8ae521e93eb983dc9c42dd3b39ce98bd6256c73daf68fe5d54857eaa3f5ba3022be93cdb010bc22aed973de04b88482b32c20bbd57c41e3aed83b3475f3df72b

    • SSDEEP

      49152:wQc81KnB/a/hNT/dBYa8aesY3Ot4N7G/:wDta/hNT/dBn0etD/

    • 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