General

  • Target

    c9cf740d898c146caf9717d3e5d780ac9893783ad65c79afbb1cbbf9da8f842e

  • Size

    2.0MB

  • Sample

    240525-2cbdxacf4t

  • MD5

    7f4a742a40f1cc8e7a4c4d2809216a31

  • SHA1

    46ceaca7732a7f693146de327c35631cdbaeeb22

  • SHA256

    c9cf740d898c146caf9717d3e5d780ac9893783ad65c79afbb1cbbf9da8f842e

  • SHA512

    b5f444949e8348fc96d84f86fb9c405f8ecb9e9b1d5f308bf3666944bda917ab843071b9cf898d9eafd73a2caa28944d19bee6708048c6ecb013d0ba2b243c0b

  • SSDEEP

    49152:s4K3x1vUKJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18KtIuoITsdZ

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

      c9cf740d898c146caf9717d3e5d780ac9893783ad65c79afbb1cbbf9da8f842e

    • Size

      2.0MB

    • MD5

      7f4a742a40f1cc8e7a4c4d2809216a31

    • SHA1

      46ceaca7732a7f693146de327c35631cdbaeeb22

    • SHA256

      c9cf740d898c146caf9717d3e5d780ac9893783ad65c79afbb1cbbf9da8f842e

    • SHA512

      b5f444949e8348fc96d84f86fb9c405f8ecb9e9b1d5f308bf3666944bda917ab843071b9cf898d9eafd73a2caa28944d19bee6708048c6ecb013d0ba2b243c0b

    • SSDEEP

      49152:s4K3x1vUKJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18KtIuoITsdZ

    • 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