General

  • Target

    ab8a1c4cd0900427759f61233d6a79abe403a85d6467e2f8f596c1b950b74acd

  • Size

    2.0MB

  • Sample

    240524-11xflsda77

  • MD5

    5eb63bfedf53c81afce2b09946ec4494

  • SHA1

    e0391d72664acaa955cc9b1471f05e7b4c26e47d

  • SHA256

    ab8a1c4cd0900427759f61233d6a79abe403a85d6467e2f8f596c1b950b74acd

  • SHA512

    8ff69748f80f110028be5945fc6ec787ea3669f2cf50276d2a76e2cbcb84d481e3aa0e0a1b0f8d98fac9fd5d8899d8608184defe985084cae32407c285e58350

  • SSDEEP

    49152:s4K3x1vUWJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18WtIuoITsdZ

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

      ab8a1c4cd0900427759f61233d6a79abe403a85d6467e2f8f596c1b950b74acd

    • Size

      2.0MB

    • MD5

      5eb63bfedf53c81afce2b09946ec4494

    • SHA1

      e0391d72664acaa955cc9b1471f05e7b4c26e47d

    • SHA256

      ab8a1c4cd0900427759f61233d6a79abe403a85d6467e2f8f596c1b950b74acd

    • SHA512

      8ff69748f80f110028be5945fc6ec787ea3669f2cf50276d2a76e2cbcb84d481e3aa0e0a1b0f8d98fac9fd5d8899d8608184defe985084cae32407c285e58350

    • SSDEEP

      49152:s4K3x1vUWJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18WtIuoITsdZ

    • 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