General

  • Target

    b10b6221d8b982076113104defb04c6c1a344e2c609e3983dce1e65aa87bb441

  • Size

    2.0MB

  • Sample

    240527-a45y2sbb36

  • MD5

    eebeae5ab7daa635ed0ceb7eccc7b744

  • SHA1

    cc1afc7ad66801a24057723e5fbc7c52f05ebfa2

  • SHA256

    b10b6221d8b982076113104defb04c6c1a344e2c609e3983dce1e65aa87bb441

  • SHA512

    37d41091d39e75aad6899b75ffcad52a337458a8151a076c5e62464ef3f754a3e541c3169a5cca31a74e0df081f6e84b563453f37ac9d601ff2a2fa37881d9db

  • SSDEEP

    49152:OePpQEhJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEhtIuoITsdZ

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

      b10b6221d8b982076113104defb04c6c1a344e2c609e3983dce1e65aa87bb441

    • Size

      2.0MB

    • MD5

      eebeae5ab7daa635ed0ceb7eccc7b744

    • SHA1

      cc1afc7ad66801a24057723e5fbc7c52f05ebfa2

    • SHA256

      b10b6221d8b982076113104defb04c6c1a344e2c609e3983dce1e65aa87bb441

    • SHA512

      37d41091d39e75aad6899b75ffcad52a337458a8151a076c5e62464ef3f754a3e541c3169a5cca31a74e0df081f6e84b563453f37ac9d601ff2a2fa37881d9db

    • SSDEEP

      49152:OePpQEhJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEhtIuoITsdZ

    • 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