BlackCat | Threat Level: critical | Type: Ransomware

Cryptographic Identifiers

SHA25646daafc57c385a2d0b5516c058ead1ee9a49c7e5c0d411f546fb31985a61fe38
MD56ff9900b271090361e63f5242ee4e8b0
File Typeexe
Size33301.5 KB
First Seen2023-04-06
File Name46daafc57c385a2d0b5516c058ead1ee9a49c7e5c0d411f546fb31985a61fe38
Tagsblackcat, direct-cpu-clock-access, exe, Ransomware, runtime-modules, v3

Malware Family: BlackCat

BlackCat, Rust ile yazılan ransomware'dir.

TypeRansomware
Programming LanguageRust
Target PlatformWindows/Linux
C2 Protocol
PurposeÇapraz platform ransomware
First Seen Year2021
AliasesALPHV

Threat Indicators (IOC)

  • SHA256: 46daafc57c385a2d0b5516c058ead1ee9a49c7e5c0d411f546fb31985a61fe38
  • MD5: 6ff9900b271090361e63f5242ee4e8b0

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: 46daafc57c385a2d"
        threat_level = "critical"
        first_seen = "2023-04-06"
    condition:
        hash.sha256(0, filesize) == "46daafc57c385a2d0b5516c058ead1ee9a49c7e5c0d411f546fb31985a61fe38"
}

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 46daafc57c385a2d0b5516c058ead1ee9a49c7e5c0d411f546fb31985a61fe38 # MD5 6ff9900b271090361e63f5242ee4e8b0
TypeValueNote
sha256 46daafc57c385a2d0b5516c058ead1ee9a49c7e5c0d411f546fb31985a61fe38 Sample:BlackCat
md5 6ff9900b271090361e63f5242ee4e8b0 Sample:BlackCat
Tags
blackcatransomwaremalwarecriticalsha256hash-analizi