BlackCat | Threat Level: critical | Type: Ransomware

Cryptographic Identifiers

SHA256655abd0b5067ec53b25ea387c9aebe0fbafd5209e53bc7447c7d7425cb76b175
MD5aac32c2f1c860af31c48a64a6af56ff1
File Typeexe
Size2997.0 KB
First Seen2022-06-21
File Name655abd0b5067ec53b25ea387c9aebe0fbafd5209e53bc7447c7d7425cb76b175
Tagsblackcat, BlackCat Indicators, exe

Malware Family: BlackCat

BlackCat, Rust ransomware'dir.

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

Threat Indicators (IOC)

  • SHA256: 655abd0b5067ec53b25ea387c9aebe0fbafd5209e53bc7447c7d7425cb76b175
  • MD5: aac32c2f1c860af31c48a64a6af56ff1

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: 655abd0b5067ec53"
        threat_level = "critical"
        first_seen = "2022-06-21"
    condition:
        hash.sha256(0, filesize) == "655abd0b5067ec53b25ea387c9aebe0fbafd5209e53bc7447c7d7425cb76b175"
}

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 655abd0b5067ec53b25ea387c9aebe0fbafd5209e53bc7447c7d7425cb76b175 # MD5 aac32c2f1c860af31c48a64a6af56ff1
TypeValueNote
sha256 655abd0b5067ec53b25ea387c9aebe0fbafd5209e53bc7447c7d7425cb76b175 Sample:BlackCat
md5 aac32c2f1c860af31c48a64a6af56ff1 Sample:BlackCat
Tags
blackcatransomwaremalwarecriticalsha256hash-analizi