General

  • Target

    f7f0e871a7578d1919f125ea894355b2bb69a09ea91d8009df79b9d4a5fa6393

  • Size

    2.0MB

  • Sample

    240525-zvxzhsag78

  • MD5

    6248c9d7d43aa0e42b4b43f9c65c30b8

  • SHA1

    919617619dda149657d7fe7d7657a6059f6d5590

  • SHA256

    f7f0e871a7578d1919f125ea894355b2bb69a09ea91d8009df79b9d4a5fa6393

  • SHA512

    72d7cf5c14fb6d91e5799ba6bf0f3b4557ed8c3ae32eb15addd0dff7b2cd174e3c39a02769e084fdc4c5086ef0d007b3476a29cb3f0718399bdd6cbe48b1a4f3

  • SSDEEP

    49152:s4K3x1vU2JtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex182tIuoITsdZ

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

      f7f0e871a7578d1919f125ea894355b2bb69a09ea91d8009df79b9d4a5fa6393

    • Size

      2.0MB

    • MD5

      6248c9d7d43aa0e42b4b43f9c65c30b8

    • SHA1

      919617619dda149657d7fe7d7657a6059f6d5590

    • SHA256

      f7f0e871a7578d1919f125ea894355b2bb69a09ea91d8009df79b9d4a5fa6393

    • SHA512

      72d7cf5c14fb6d91e5799ba6bf0f3b4557ed8c3ae32eb15addd0dff7b2cd174e3c39a02769e084fdc4c5086ef0d007b3476a29cb3f0718399bdd6cbe48b1a4f3

    • SSDEEP

      49152:s4K3x1vU2JtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex182tIuoITsdZ

    • 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