General

  • Target

    573487b20df220ed0e0b7e17124fad119d8473b6f9ff8f839a75fe721887927d

  • Size

    2.0MB

  • Sample

    240526-agehksfe8t

  • MD5

    8e8a940997b272727b62d6ec2402e812

  • SHA1

    93e917078ae532df79133dfa42ae6dd1f2388492

  • SHA256

    573487b20df220ed0e0b7e17124fad119d8473b6f9ff8f839a75fe721887927d

  • SHA512

    c4f7314ee4c3948297e4b65396177d0b7fb4d0c417f59fdb4ff4d307d7438cb2b55cf297a0fefdeedbba3974d36e10cbb9a4b1ba766c19eaa327809c28c5cb3a

  • SSDEEP

    49152:s4K3x1vU2JtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex182tIuoITsdZ

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

      573487b20df220ed0e0b7e17124fad119d8473b6f9ff8f839a75fe721887927d

    • Size

      2.0MB

    • MD5

      8e8a940997b272727b62d6ec2402e812

    • SHA1

      93e917078ae532df79133dfa42ae6dd1f2388492

    • SHA256

      573487b20df220ed0e0b7e17124fad119d8473b6f9ff8f839a75fe721887927d

    • SHA512

      c4f7314ee4c3948297e4b65396177d0b7fb4d0c417f59fdb4ff4d307d7438cb2b55cf297a0fefdeedbba3974d36e10cbb9a4b1ba766c19eaa327809c28c5cb3a

    • SSDEEP

      49152:s4K3x1vU2JtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex182tIuoITsdZ

    • 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