BlackCat | Threat Level: critical | Type: Ransomware

Cryptographic Identifiers

SHA256f8c08d00ff6e8c6adb1a93cd133b19302d0b651afd73ccb54e3b6ac6c60d99c6
MD579fea7f741760ea21ff655137af05bd0
File Typeelf
Size1877.0 KB
First Seen2021-12-24
File Namef8c08d00ff6e8c6adb1a93cd133b19302d0b651afd73ccb54e3b6ac6c60d99c6
TagsALPHV, blackcat, elf, Ransomware

Malware Family: BlackCat

BlackCat, Rust ransomware'dir.

TypeRansomware
Programming LanguageRust
Target PlatformWindows/Linux
C2 Protocol
PurposeRansomware
First Seen Year2021
AliasesALPHV

Threat Indicators (IOC)

  • SHA256: f8c08d00ff6e8c6adb1a93cd133b19302d0b651afd73ccb54e3b6ac6c60d99c6
  • MD5: 79fea7f741760ea21ff655137af05bd0

You can verify all hash values of this sample on VirusTotal.

System Cleanup Guide

  1. Sistemi ağdan DERHAL ayırın — diğer cihazlara yayılmayı durdurun
  2. Do not pay the ransom — there is no guarantee your files will be restored
  3. Quarantine the affected drives
  4. Kullanılan fidye yazılımı ailesini belirleyin (nomoreransom.org)
  5. Try available decryptor tools (the NoMoreRansom project)
  6. Report the incident to the authorities (cybercrime unit)
  7. Temiz bir yedekten kurtarın; yedeğiniz yoksa sürücüyü saklayın

YARA Rule Hints

rule BlackCat_SHA256 {
    meta:
        description = "BlackCat sample: f8c08d00ff6e8c6a"
        threat_level = "critical"
        first_seen = "2021-12-24"
    condition:
        hash.sha256(0, filesize) == "f8c08d00ff6e8c6adb1a93cd133b19302d0b651afd73ccb54e3b6ac6c60d99c6"
}

BlackCat — Malware Profile

BlackCat, Rust ile yazılan ransomware'dir.

Malware Type
Ransomware
Programming Language
Rust
C2 Protocol
Target Systems
Windows/Linux
Also Known As (AKA)
ALPHV

Technical Details

BlackCat (ALPHV) is the first major ransomware written in Rust, enabling cross-platform attacks on Windows, Linux, and VMware ESXi. Emerged November 2021 as a RaaS operation. Triple extortion: file encryption + data exfiltration + DDoS threats. Uses AES-128 (CTR mode) or ChaCha20 for file encryption with RSA-2048 for key protection. Highly configurable JSON config: target extensions, excluded paths, credential stuffing. Uses intermittent encryption (partial file encryption) for speed. ALPHV 3.0 (Sphynx) introduced EXMATTER data exfiltration tool. FBI disrupted December 2023 with decryption keys released for 500 victims. Believed operated by former DarkSide/BlackMatter members.

Attribution / Threat Actor

ALPHV (linked to DarkSide/BlackMatter)

Capabilities & Behavior

Dosya Şifreleme (AES/RSA)
Gölge Kopya Silme
Yedek Kaldırma
Fidye Notu Oluşturma
Kalıcılık Sağlama
Ağ Paylaşımı Şifreleme
Anti-Analiz Teknikleri
Çift Gasp (Data Leak)

IOC List (2 indicators)

IOC — BlackCat
# SHA256 f8c08d00ff6e8c6adb1a93cd133b19302d0b651afd73ccb54e3b6ac6c60d99c6 # MD5 79fea7f741760ea21ff655137af05bd0
TypeValueNote
sha256 f8c08d00ff6e8c6adb1a93cd133b19302d0b651afd73ccb54e3b6ac6c60d99c6 Sample:BlackCat
md5 79fea7f741760ea21ff655137af05bd0 Sample:BlackCat
Tags
blackcatransomwaremalwarecriticalsha256hash-analizi