General

  • Target

    1901d4a603a8cdf5de8507ad09c161106fbd4b05dab53f38431c02a554fa3f8a

  • Size

    2.0MB

  • Sample

    240526-3emqdsgh49

  • MD5

    5800c99c367f03d08eaff1f4d253f84e

  • SHA1

    b4920948f2747017386f6ceec81dea5661e31df1

  • SHA256

    1901d4a603a8cdf5de8507ad09c161106fbd4b05dab53f38431c02a554fa3f8a

  • SHA512

    dd12a4a3d68a2eb91176a8d49d8f5cb64502b8f92cc80781343ac7720f9e1dba6b2e092f06f7ed4c04cb7bdc46572cbc7f4f9d9fd9c8bae7cbccc49403e18c1a

  • SSDEEP

    49152:OePpQEhJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEhtIuoITsdZ

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

      1901d4a603a8cdf5de8507ad09c161106fbd4b05dab53f38431c02a554fa3f8a

    • Size

      2.0MB

    • MD5

      5800c99c367f03d08eaff1f4d253f84e

    • SHA1

      b4920948f2747017386f6ceec81dea5661e31df1

    • SHA256

      1901d4a603a8cdf5de8507ad09c161106fbd4b05dab53f38431c02a554fa3f8a

    • SHA512

      dd12a4a3d68a2eb91176a8d49d8f5cb64502b8f92cc80781343ac7720f9e1dba6b2e092f06f7ed4c04cb7bdc46572cbc7f4f9d9fd9c8bae7cbccc49403e18c1a

    • SSDEEP

      49152:OePpQEhJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEhtIuoITsdZ

    • 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