General

  • Target

    c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89.exe

  • Size

    3.6MB

  • Sample

    240605-cl4z5sbc6w

  • MD5

    131e367009cf014321e7a70e70c4067c

  • SHA1

    4c02332af53519fdae235f804f5144ba9c7e725d

  • SHA256

    c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89

  • SHA512

    3702fefbcf4eab279484359f61d997b7c32d9c77dd9e255a44e96de9373d18b68ff262037494203f181c359aca549020dcfea3db01d11f8f51e224261259f99e

  • SSDEEP

    49152:fWN3Bsjz4Ddee7wE4o40nQaoJab9Xejv2aH0n2EBvnE8/8OhkqdHG22T9d:f6ujz4DdeClnE8f4T

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/r8z0l

https://steamcommunity.com/profiles/76561199698764354

Attributes
  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Targets

    • Target

      c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89.exe

    • Size

      3.6MB

    • MD5

      131e367009cf014321e7a70e70c4067c

    • SHA1

      4c02332af53519fdae235f804f5144ba9c7e725d

    • SHA256

      c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89

    • SHA512

      3702fefbcf4eab279484359f61d997b7c32d9c77dd9e255a44e96de9373d18b68ff262037494203f181c359aca549020dcfea3db01d11f8f51e224261259f99e

    • SSDEEP

      49152:fWN3Bsjz4Ddee7wE4o40nQaoJab9Xejv2aH0n2EBvnE8/8OhkqdHG22T9d:f6ujz4DdeClnE8f4T

    • Detect Vidar Stealer

    • Stealc

      Stealc is an infostealer written in C++.

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • Detects Windows executables referencing non-Windows User-Agents

    • 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.

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • 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 Enterprise v15

Tasks