General

  • Target

    bc320765a0218caa27ac51940913aba0497d8a5d8acdaf37e17ffc2e6ea28480

  • Size

    2.0MB

  • Sample

    240524-2prxesdg8z

  • MD5

    28e1811f19daa3cd7a3e7cadac19725a

  • SHA1

    eee93e62661b3f86d5e51e84213a1249033e4afa

  • SHA256

    bc320765a0218caa27ac51940913aba0497d8a5d8acdaf37e17ffc2e6ea28480

  • SHA512

    16efded87483075a3de6dc1bd1949a48a683f0ed5d8859955a9182dfc23cd0d23411674e9287283a7bfe27b0f9b4fa610eaeffdd0d95e2876aac762ef3c616ee

  • SSDEEP

    49152:s4K3x1vUSJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18StIuoITsdZ

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

      bc320765a0218caa27ac51940913aba0497d8a5d8acdaf37e17ffc2e6ea28480

    • Size

      2.0MB

    • MD5

      28e1811f19daa3cd7a3e7cadac19725a

    • SHA1

      eee93e62661b3f86d5e51e84213a1249033e4afa

    • SHA256

      bc320765a0218caa27ac51940913aba0497d8a5d8acdaf37e17ffc2e6ea28480

    • SHA512

      16efded87483075a3de6dc1bd1949a48a683f0ed5d8859955a9182dfc23cd0d23411674e9287283a7bfe27b0f9b4fa610eaeffdd0d95e2876aac762ef3c616ee

    • SSDEEP

      49152:s4K3x1vUSJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18StIuoITsdZ

    • 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