General

  • Target

    cb2911ac6c8d023c719709787a3c4fbb44d3f2b5a07a7dd8c4727cff44ce106c

  • Size

    2.0MB

  • Sample

    240524-1pfzgsce73

  • MD5

    5f0a33f1d64e3bce395a5307d821d2c7

  • SHA1

    74b9b6f266d3a24d10e64d2973068b26a155bd76

  • SHA256

    cb2911ac6c8d023c719709787a3c4fbb44d3f2b5a07a7dd8c4727cff44ce106c

  • SHA512

    c6453d1c34ccb33e41e0d3454e0582977a80baa85f1f1c20125fc7ad04b5dfc32c3d94dad575a87c5ac895adbf493acee7377cd56b04df5a4edb5aa7e75a0695

  • SSDEEP

    49152:s4K3x1vUiJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18itIuoITsdZ

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

      cb2911ac6c8d023c719709787a3c4fbb44d3f2b5a07a7dd8c4727cff44ce106c

    • Size

      2.0MB

    • MD5

      5f0a33f1d64e3bce395a5307d821d2c7

    • SHA1

      74b9b6f266d3a24d10e64d2973068b26a155bd76

    • SHA256

      cb2911ac6c8d023c719709787a3c4fbb44d3f2b5a07a7dd8c4727cff44ce106c

    • SHA512

      c6453d1c34ccb33e41e0d3454e0582977a80baa85f1f1c20125fc7ad04b5dfc32c3d94dad575a87c5ac895adbf493acee7377cd56b04df5a4edb5aa7e75a0695

    • SSDEEP

      49152:s4K3x1vUiJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18itIuoITsdZ

    • 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