General

  • Target
    681260fda074907f3e930d321f8da712.bin
  • Size 10.1MB
  • Sample240518-c7b69age69
  • SHA256 b3257229561e0cf13e5b13f8171b21d4667898e12e99608c11437a9cd16d7128
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • stealc

rc4.plain

Targets

    • Target
      7z.dll
    • Size 1.4MB
    • SHA256 15b10608affd4442d0e2ddb9b2fea847cd15d5405928d78ab73d81dae66db9e4
    • MD5 SHA1 SHA512 SSDEEP
    Score
    1/10
    • Target
      Sfx_en.bin
    • Size 33KB
    • SHA256 d8f22e16a72e981b8c1d9978bdaefebfc2546d49c8f49f1ed3ede792f3812297
    • MD5 SHA1 SHA512 SSDEEP
    Score
    1/10
    • Target
      WinNc.exe
    • Size 21.3MB
    • SHA256 34a31ce56c97fdc7a5db20c1dec741830c75d97b87c11c1658754419213ff6d7
    • MD5 SHA1 SHA512 SSDEEP
    • 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

    • Loads dropped DLL

    • 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.

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Suspicious use of SetThreadContext

    • Target
      unrar64.dll
    • Size 254KB
    • SHA256 bcf23a9441d6199cc13ef8bffea24f9d35f2d332fe90139a2297bcf174eba8e3
    • MD5 SHA1 SHA512 SSDEEP
    Score
    1/10

MITRE ATT&CK Enterprise v15

Tasks