General

  • Target

    760132f8e1db40b450e994fd7c4815632154b64efbce5f5d2630f8e132c01b79

  • Size

    2.4MB

  • Sample

    240524-3e89dseh21

  • MD5

    303835ac2f30cfb546615279301b8747

  • SHA1

    af5be0dc5d93d0fb6280af079da93367b40ae716

  • SHA256

    760132f8e1db40b450e994fd7c4815632154b64efbce5f5d2630f8e132c01b79

  • SHA512

    c41b582cde40e9352a9906d021ca65a9fc6a2de212a3db82e2b032ae27b217a6fb5caafbbe611fb7485aae674f591744426728436e4e789851b3bed530601f3a

  • SSDEEP

    49152:jxIRJF1HL+VdX68kUOJtTF+TxMoxc1TU+j+dAzGwlrh:jEJF16dX68dOtIuoITsdZ

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

      760132f8e1db40b450e994fd7c4815632154b64efbce5f5d2630f8e132c01b79

    • Size

      2.4MB

    • MD5

      303835ac2f30cfb546615279301b8747

    • SHA1

      af5be0dc5d93d0fb6280af079da93367b40ae716

    • SHA256

      760132f8e1db40b450e994fd7c4815632154b64efbce5f5d2630f8e132c01b79

    • SHA512

      c41b582cde40e9352a9906d021ca65a9fc6a2de212a3db82e2b032ae27b217a6fb5caafbbe611fb7485aae674f591744426728436e4e789851b3bed530601f3a

    • SSDEEP

      49152:jxIRJF1HL+VdX68kUOJtTF+TxMoxc1TU+j+dAzGwlrh:jEJF16dX68dOtIuoITsdZ

    • Detect Vidar Stealer

    • Stealc

      Stealc is an infostealer written in C++.

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • Detect binaries embedding considerable number of MFA browser extension IDs.

    • Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs.

    • Detects Windows executables referencing non-Windows User-Agents

    • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

    • Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion

    • Detects executables containing potential Windows Defender anti-emulation checks

    • 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.

    • Suspicious use of SetThreadContext

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

3
T1012

System Information Discovery

3
T1082

Collection

Data from Local System

4
T1005

Tasks