General

  • Target

    7c00e05675e4315cd8fdb150490a5c91f16867c00febea4cb57559d63c143701

  • Size

    2.0MB

  • Sample

    240525-at7pwsgf25

  • MD5

    5538f3e6872e05cae7d3088f3c6a490e

  • SHA1

    a4416c1f0417d38c6c330be21d1eb9deadc74d53

  • SHA256

    7c00e05675e4315cd8fdb150490a5c91f16867c00febea4cb57559d63c143701

  • SHA512

    e53ad2c60ee979bf4efcd7767425c146643fc3299633c04c00e69711931377f95a0f076c8dd569f6cf82fc90c964fde563ce2e0922a5ae93ec87e4bdae37b106

  • SSDEEP

    49152:s4K3x1vU+JtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18+tIuoITsdZ

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

      7c00e05675e4315cd8fdb150490a5c91f16867c00febea4cb57559d63c143701

    • Size

      2.0MB

    • MD5

      5538f3e6872e05cae7d3088f3c6a490e

    • SHA1

      a4416c1f0417d38c6c330be21d1eb9deadc74d53

    • SHA256

      7c00e05675e4315cd8fdb150490a5c91f16867c00febea4cb57559d63c143701

    • SHA512

      e53ad2c60ee979bf4efcd7767425c146643fc3299633c04c00e69711931377f95a0f076c8dd569f6cf82fc90c964fde563ce2e0922a5ae93ec87e4bdae37b106

    • SSDEEP

      49152:s4K3x1vU+JtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18+tIuoITsdZ

    • 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