General

  • Target

    Setup.exe

  • Size

    866KB

  • Sample

    240616-2kr2ma1fqe

  • MD5

    4625f69b1be6f7d738a4df335c6ca306

  • SHA1

    52125696d6846193d9e8275568ad0965d040c06a

  • SHA256

    929804f60f8f3a0b0d7862cd91eb6be0a2ba694c4a28e3f9fa2d65ff171469a6

  • SHA512

    863bc0a02a4b94b64fa1a305f9d9ecf8bcacc961578430b922196b9fce30823a3a07442cf968176b0e291f5abc7170f9f9dab37e7988daeb99c4c9b1a7ad4ab7

  • SSDEEP

    24576:Zg8AiKw1LbXu9Z5aHrS0tBF9doVhjY1fOm0w3Q6l6v3:ZgBW56T8BR2fU12EQnv3

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/memve4erin

https://steamcommunity.com/profiles/76561199699680841

Attributes
  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0

Targets

    • Target

      Setup.exe

    • Size

      866KB

    • MD5

      4625f69b1be6f7d738a4df335c6ca306

    • SHA1

      52125696d6846193d9e8275568ad0965d040c06a

    • SHA256

      929804f60f8f3a0b0d7862cd91eb6be0a2ba694c4a28e3f9fa2d65ff171469a6

    • SHA512

      863bc0a02a4b94b64fa1a305f9d9ecf8bcacc961578430b922196b9fce30823a3a07442cf968176b0e291f5abc7170f9f9dab37e7988daeb99c4c9b1a7ad4ab7

    • SSDEEP

      24576:Zg8AiKw1LbXu9Z5aHrS0tBF9doVhjY1fOm0w3Q6l6v3:ZgBW56T8BR2fU12EQnv3

    • 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

    • Loads dropped DLL

    • 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.

MITRE ATT&CK Matrix ATT&CK v13

Defense Evasion

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Modify Registry

1
T1112

Credential Access

Unsecured Credentials

4
T1552

Credentials In Files

4
T1552.001

Discovery

Query Registry

4
T1012

System Information Discovery

4
T1082

Peripheral Device Discovery

1
T1120

Process Discovery

1
T1057

Collection

Data from Local System

4
T1005

Tasks