General

  • Target

    23593481dc5630ec73ebe061015378716b31902c3087b4d111bec9b6bc11d6ab

  • Size

    2.0MB

  • Sample

    240525-1he4lsbh26

  • MD5

    48d3bfafb47510d674a11414270851cd

  • SHA1

    a7c3a0cae2f0335f370eefa03ec94861d709d5fe

  • SHA256

    23593481dc5630ec73ebe061015378716b31902c3087b4d111bec9b6bc11d6ab

  • SHA512

    f871b57f3c477ace85a6d795298e3b0462e0408b785c6ba8bceadd785e4151ebe3e709cae40872ec06612c6f8f04e5aa463ac08a2525f0fe17565bbcee6a4fa2

  • SSDEEP

    49152:s4K3x1vUqJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18qtIuoITsdZ

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

      23593481dc5630ec73ebe061015378716b31902c3087b4d111bec9b6bc11d6ab

    • Size

      2.0MB

    • MD5

      48d3bfafb47510d674a11414270851cd

    • SHA1

      a7c3a0cae2f0335f370eefa03ec94861d709d5fe

    • SHA256

      23593481dc5630ec73ebe061015378716b31902c3087b4d111bec9b6bc11d6ab

    • SHA512

      f871b57f3c477ace85a6d795298e3b0462e0408b785c6ba8bceadd785e4151ebe3e709cae40872ec06612c6f8f04e5aa463ac08a2525f0fe17565bbcee6a4fa2

    • SSDEEP

      49152:s4K3x1vUqJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18qtIuoITsdZ

    • 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 Matrix ATT&CK v13

Credential Access

Unsecured Credentials

4
T1552

Credentials In Files

4
T1552.001

Discovery

Query Registry

3
T1012

System Information Discovery

3
T1082

Collection

Data from Local System

4
T1005

Tasks