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General

  • Target

    fec56798464e65c834bad15ec9a2ffbd34e69753eb7c6992b08b4e8df31265ea

  • Size

    2.4MB

  • Sample

    240523-z3m5aagh42

  • MD5

    6e3af7040b6bb97e2ab45c5e4598a819

  • SHA1

    5b68709fad39133b529d37002e81233a8aff658d

  • SHA256

    fec56798464e65c834bad15ec9a2ffbd34e69753eb7c6992b08b4e8df31265ea

  • SHA512

    f93f04b334f51c3f9811cb70f4bdc9513d2359e36571349ad0ee248e58be3234050894a88779d52fb215b0fde1afa9210f84f1bde5b94681a3039c83ef4fdbc4

  • SSDEEP

    49152:jxIRJF1HL+VdX68kUKJtTF+TxMoxc1TU+j+dAzGwlrh:jEJF16dX68dKtIuoITsdZ

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

      fec56798464e65c834bad15ec9a2ffbd34e69753eb7c6992b08b4e8df31265ea

    • Size

      2.4MB

    • MD5

      6e3af7040b6bb97e2ab45c5e4598a819

    • SHA1

      5b68709fad39133b529d37002e81233a8aff658d

    • SHA256

      fec56798464e65c834bad15ec9a2ffbd34e69753eb7c6992b08b4e8df31265ea

    • SHA512

      f93f04b334f51c3f9811cb70f4bdc9513d2359e36571349ad0ee248e58be3234050894a88779d52fb215b0fde1afa9210f84f1bde5b94681a3039c83ef4fdbc4

    • SSDEEP

      49152:jxIRJF1HL+VdX68kUKJtTF+TxMoxc1TU+j+dAzGwlrh:jEJF16dX68dKtIuoITsdZ

    • 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