General

  • Target

    135f20112b842057b0028fb8567fa63a9cf31d0577b9f9c31215cf930690c94e

  • Size

    2.0MB

  • Sample

    240524-16gx4sda4w

  • MD5

    a6a0a97dac45489c7a701dc738a635a7

  • SHA1

    eed5747e3d7f48306aab4b046e35feb374863f03

  • SHA256

    135f20112b842057b0028fb8567fa63a9cf31d0577b9f9c31215cf930690c94e

  • SHA512

    a7256c5972a65cf69940942bd6e48c651a4d6c1dad613d1ec317d3fd5ca516a8d9ae54111cac414f1d3406f39fc88715b38dea258310ff6608f3d2498461b9fa

  • SSDEEP

    49152:s4K3x1vUWJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18WtIuoITsdZ

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

      135f20112b842057b0028fb8567fa63a9cf31d0577b9f9c31215cf930690c94e

    • Size

      2.0MB

    • MD5

      a6a0a97dac45489c7a701dc738a635a7

    • SHA1

      eed5747e3d7f48306aab4b046e35feb374863f03

    • SHA256

      135f20112b842057b0028fb8567fa63a9cf31d0577b9f9c31215cf930690c94e

    • SHA512

      a7256c5972a65cf69940942bd6e48c651a4d6c1dad613d1ec317d3fd5ca516a8d9ae54111cac414f1d3406f39fc88715b38dea258310ff6608f3d2498461b9fa

    • SSDEEP

      49152:s4K3x1vUWJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18WtIuoITsdZ

    • 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