General

  • Target

    b8796eb6af6a2bf36e6d3e35738cdd2cb41e9f4e2ef1d6ec9678dd88e03c3f29

  • Size

    2.0MB

  • Sample

    240527-bv22gacd33

  • MD5

    f5134de60a5a3717608dfe8baa2d2580

  • SHA1

    7c87ef2bb65cc76a942ce307e822b5cec80f1ff3

  • SHA256

    b8796eb6af6a2bf36e6d3e35738cdd2cb41e9f4e2ef1d6ec9678dd88e03c3f29

  • SHA512

    b574af8b03ffb96397d98a7cf1fef36b1fe3c2dc449bb57cf2de62f75ba70bcbd77b4f15283c80b939fa04d2911893a177b86f8cb89a463d11b6524df7ea3644

  • SSDEEP

    49152:OePpQEdJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEdtIuoITsdZ

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

      b8796eb6af6a2bf36e6d3e35738cdd2cb41e9f4e2ef1d6ec9678dd88e03c3f29

    • Size

      2.0MB

    • MD5

      f5134de60a5a3717608dfe8baa2d2580

    • SHA1

      7c87ef2bb65cc76a942ce307e822b5cec80f1ff3

    • SHA256

      b8796eb6af6a2bf36e6d3e35738cdd2cb41e9f4e2ef1d6ec9678dd88e03c3f29

    • SHA512

      b574af8b03ffb96397d98a7cf1fef36b1fe3c2dc449bb57cf2de62f75ba70bcbd77b4f15283c80b939fa04d2911893a177b86f8cb89a463d11b6524df7ea3644

    • SSDEEP

      49152:OePpQEdJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEdtIuoITsdZ

    • 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