General

  • Target

    643d8c70aea278c47925c3844d4b60c30ee8130585fde51094f25d8c8b8855bc

  • Size

    2.0MB

  • Sample

    240526-1k53tada51

  • MD5

    41daf25752c8ec3026bd17225c33a81c

  • SHA1

    04529c570314886b42eeb2260339e515a5ed75b3

  • SHA256

    643d8c70aea278c47925c3844d4b60c30ee8130585fde51094f25d8c8b8855bc

  • SHA512

    50d4a8733b5a8327b7c15c3358a818b39ab878d962e7f2c92de72b16a550d64f5e3808299e92003471606b94cae14365cce11890db10008f5595b842944b3c36

  • SSDEEP

    49152:OePpQEBJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEBtIuoITsdZ

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

      643d8c70aea278c47925c3844d4b60c30ee8130585fde51094f25d8c8b8855bc

    • Size

      2.0MB

    • MD5

      41daf25752c8ec3026bd17225c33a81c

    • SHA1

      04529c570314886b42eeb2260339e515a5ed75b3

    • SHA256

      643d8c70aea278c47925c3844d4b60c30ee8130585fde51094f25d8c8b8855bc

    • SHA512

      50d4a8733b5a8327b7c15c3358a818b39ab878d962e7f2c92de72b16a550d64f5e3808299e92003471606b94cae14365cce11890db10008f5595b842944b3c36

    • SSDEEP

      49152:OePpQEBJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEBtIuoITsdZ

    • 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