General

  • Target

    baff7fa41817893df6a448b0b6e2e611243a52e120e2d7f7262760744745c123

  • Size

    2.0MB

  • Sample

    240525-3mthxafd58

  • MD5

    f56a2c8f67fb59ec09069bf77e9c0b42

  • SHA1

    4f5bb4869b1886276e6e904baee89f597a3b97c0

  • SHA256

    baff7fa41817893df6a448b0b6e2e611243a52e120e2d7f7262760744745c123

  • SHA512

    0a7372088aa88b2a9e20547d26d847d882bfe473235fe00eab43a7365e0473a2e95ef0d17cd41051776040527d850c96673833ae09d2fc27e325464583ff57ce

  • SSDEEP

    49152:s4K3x1vUuJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18utIuoITsdZ

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

      baff7fa41817893df6a448b0b6e2e611243a52e120e2d7f7262760744745c123

    • Size

      2.0MB

    • MD5

      f56a2c8f67fb59ec09069bf77e9c0b42

    • SHA1

      4f5bb4869b1886276e6e904baee89f597a3b97c0

    • SHA256

      baff7fa41817893df6a448b0b6e2e611243a52e120e2d7f7262760744745c123

    • SHA512

      0a7372088aa88b2a9e20547d26d847d882bfe473235fe00eab43a7365e0473a2e95ef0d17cd41051776040527d850c96673833ae09d2fc27e325464583ff57ce

    • SSDEEP

      49152:s4K3x1vUuJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18utIuoITsdZ

    • 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