General

  • Target

    fdd64c1aa8c928f4584fd902451b6ea026db402678dcf37167912d3c4d6de31e

  • Size

    2.0MB

  • Sample

    240525-zrfk3aaf43

  • MD5

    5220484ada22e118f97246434e20553e

  • SHA1

    a2aa5d8782305c9a97517893afb4f9737ce437db

  • SHA256

    fdd64c1aa8c928f4584fd902451b6ea026db402678dcf37167912d3c4d6de31e

  • SHA512

    3057a7152176574e046d79503f2c0b0fc8e1afd1624c247fd78a9c9fb4ced861c01ef468448752e8d46acd996c7f044cef7dab8905ed9a7e0c864410054563b4

  • SSDEEP

    49152:s4K3x1vUKJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18KtIuoITsdZ

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

      fdd64c1aa8c928f4584fd902451b6ea026db402678dcf37167912d3c4d6de31e

    • Size

      2.0MB

    • MD5

      5220484ada22e118f97246434e20553e

    • SHA1

      a2aa5d8782305c9a97517893afb4f9737ce437db

    • SHA256

      fdd64c1aa8c928f4584fd902451b6ea026db402678dcf37167912d3c4d6de31e

    • SHA512

      3057a7152176574e046d79503f2c0b0fc8e1afd1624c247fd78a9c9fb4ced861c01ef468448752e8d46acd996c7f044cef7dab8905ed9a7e0c864410054563b4

    • SSDEEP

      49152:s4K3x1vUKJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18KtIuoITsdZ

    • Detect Vidar Stealer

    • Stealc

      Stealc is an infostealer written in C++.

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • 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

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

2
T1012

System Information Discovery

1
T1082

Collection

Data from Local System

1
T1005

Tasks