General

  • Target

    9aa5106147af7b6caee9767d3817ea7992d37d646c6c02435d1e79fea87d23cb

  • Size

    2.0MB

  • Sample

    240524-z41f1abe95

  • MD5

    7a2a8ceddd97c990fdb6dd5fd80ccc6d

  • SHA1

    37082b1184aba2b5bc0ca642af9f97f3fd541a82

  • SHA256

    9aa5106147af7b6caee9767d3817ea7992d37d646c6c02435d1e79fea87d23cb

  • SHA512

    f5a06fd4edbb20cd2a94858db75963b1a16a93bd71e6bf27baf475686b81d0a30ad55dcb427715a284535cf31c8ee4efd0a3de2a1803173c9d566bb4dd827321

  • SSDEEP

    49152:s4K3x1vUSJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18StIuoITsdZ

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

      9aa5106147af7b6caee9767d3817ea7992d37d646c6c02435d1e79fea87d23cb

    • Size

      2.0MB

    • MD5

      7a2a8ceddd97c990fdb6dd5fd80ccc6d

    • SHA1

      37082b1184aba2b5bc0ca642af9f97f3fd541a82

    • SHA256

      9aa5106147af7b6caee9767d3817ea7992d37d646c6c02435d1e79fea87d23cb

    • SHA512

      f5a06fd4edbb20cd2a94858db75963b1a16a93bd71e6bf27baf475686b81d0a30ad55dcb427715a284535cf31c8ee4efd0a3de2a1803173c9d566bb4dd827321

    • SSDEEP

      49152:s4K3x1vUSJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18StIuoITsdZ

    • 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