General

  • Target

    9e3efe108d57395a34b7b5b2510f1478d54622af3e12a4b98f24332f7905a940

  • Size

    2.0MB

  • Sample

    240525-amt58agc65

  • MD5

    e3b4d6578a3841d11bd4190d18f0138e

  • SHA1

    6dd1bccc9ae7bf3b20cc59782cf01abac15db935

  • SHA256

    9e3efe108d57395a34b7b5b2510f1478d54622af3e12a4b98f24332f7905a940

  • SHA512

    ca64f8d26e6c98c7d859d96130695bebff9ac50fb33325c8da265580a8bc207f959ec61365df85e7f067508faf4d68fc0db301f03c69dbb57a503a00dfcb84c3

  • SSDEEP

    49152:s4K3x1vUiJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18itIuoITsdZ

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

      9e3efe108d57395a34b7b5b2510f1478d54622af3e12a4b98f24332f7905a940

    • Size

      2.0MB

    • MD5

      e3b4d6578a3841d11bd4190d18f0138e

    • SHA1

      6dd1bccc9ae7bf3b20cc59782cf01abac15db935

    • SHA256

      9e3efe108d57395a34b7b5b2510f1478d54622af3e12a4b98f24332f7905a940

    • SHA512

      ca64f8d26e6c98c7d859d96130695bebff9ac50fb33325c8da265580a8bc207f959ec61365df85e7f067508faf4d68fc0db301f03c69dbb57a503a00dfcb84c3

    • SSDEEP

      49152:s4K3x1vUiJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18itIuoITsdZ

    • 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