General

  • Target

    6db4da3b6c5aa8cb457d4a3e44eb6e10d0563f06edf83feb4253dde78d9be5f2

  • Size

    2.0MB

  • Sample

    240526-1rz55sec27

  • MD5

    dc6c57b2b64e6954ecb098fab260a861

  • SHA1

    512df27b255ece715a0d5f7751e511f93f8c4140

  • SHA256

    6db4da3b6c5aa8cb457d4a3e44eb6e10d0563f06edf83feb4253dde78d9be5f2

  • SHA512

    6673b5deecc215fab14ea02af94d3ad5ea83f3c8cc2d6c32660ced98405293d51784568a851fd17df1eb3990ce356edd89b99b411736f64a457cc9389c3fdb09

  • SSDEEP

    49152:OePpQEdJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEdtIuoITsdZ

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

      6db4da3b6c5aa8cb457d4a3e44eb6e10d0563f06edf83feb4253dde78d9be5f2

    • Size

      2.0MB

    • MD5

      dc6c57b2b64e6954ecb098fab260a861

    • SHA1

      512df27b255ece715a0d5f7751e511f93f8c4140

    • SHA256

      6db4da3b6c5aa8cb457d4a3e44eb6e10d0563f06edf83feb4253dde78d9be5f2

    • SHA512

      6673b5deecc215fab14ea02af94d3ad5ea83f3c8cc2d6c32660ced98405293d51784568a851fd17df1eb3990ce356edd89b99b411736f64a457cc9389c3fdb09

    • SSDEEP

      49152:OePpQEdJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEdtIuoITsdZ

    • 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