General

  • Target

    cf9f7b603629d46c825a68ec13b89180c50515d87ea22e03ad02e3cac22e42a9

  • Size

    2.0MB

  • Sample

    240525-1mp5dacb36

  • MD5

    5b841be9a09dd0fe03eb38286b40e3de

  • SHA1

    8c1b987a9d7cfaa27406c3e0f63c8d771f8be2cd

  • SHA256

    cf9f7b603629d46c825a68ec13b89180c50515d87ea22e03ad02e3cac22e42a9

  • SHA512

    55fbd9721ffe42a0088fe32febaf3867250901978207003db30526f4835fd0e93170038390f49736006ddced451458338809c6214f1b44016dc0a148d6030217

  • SSDEEP

    49152:s4K3x1vUaJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18atIuoITsdZ

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

      cf9f7b603629d46c825a68ec13b89180c50515d87ea22e03ad02e3cac22e42a9

    • Size

      2.0MB

    • MD5

      5b841be9a09dd0fe03eb38286b40e3de

    • SHA1

      8c1b987a9d7cfaa27406c3e0f63c8d771f8be2cd

    • SHA256

      cf9f7b603629d46c825a68ec13b89180c50515d87ea22e03ad02e3cac22e42a9

    • SHA512

      55fbd9721ffe42a0088fe32febaf3867250901978207003db30526f4835fd0e93170038390f49736006ddced451458338809c6214f1b44016dc0a148d6030217

    • SSDEEP

      49152:s4K3x1vUaJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18atIuoITsdZ

    • 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