General

  • Target

    b44a383cb058e4d309eeded14756d22fbe2bcd5dd61251033b766dad8120ad80

  • Size

    2.0MB

  • Sample

    240526-almprafg4v

  • MD5

    a6ba1c382a2a4cb00475297f88379e51

  • SHA1

    b972a03263d3885fada271f6c452341feea9aa2f

  • SHA256

    b44a383cb058e4d309eeded14756d22fbe2bcd5dd61251033b766dad8120ad80

  • SHA512

    886d377f796f46249e016bfa6a8068badf1648cefb98395783a42959c0abeb626e43700e622eccacf7a4f6eea10b4d51893bbffeb375c440738d2a030d106cfd

  • SSDEEP

    49152:s4K3x1vUCJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18CtIuoITsdZ

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199689717899

https://t.me/copterwin

Attributes
  • user_agent

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

Targets

    • Target

      b44a383cb058e4d309eeded14756d22fbe2bcd5dd61251033b766dad8120ad80

    • Size

      2.0MB

    • MD5

      a6ba1c382a2a4cb00475297f88379e51

    • SHA1

      b972a03263d3885fada271f6c452341feea9aa2f

    • SHA256

      b44a383cb058e4d309eeded14756d22fbe2bcd5dd61251033b766dad8120ad80

    • SHA512

      886d377f796f46249e016bfa6a8068badf1648cefb98395783a42959c0abeb626e43700e622eccacf7a4f6eea10b4d51893bbffeb375c440738d2a030d106cfd

    • SSDEEP

      49152:s4K3x1vUCJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18CtIuoITsdZ

    • 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 local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • 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