BlackCat | Threat Level: critical | Type: Ransomware

Cryptographic Identifiers

SHA256bc8832f5a8911a1f6f979cbc37e33689f0066078d88bf5c14df534133175d75f
MD52f33382f7d3c45f47ac1c73d7395921a
File Typeexe
Size33827.5 KB
First Seen2023-09-18
File Namebc8832f5a8911a1f6f979cbc37e33689f0066078d88bf5c14df534133175d75f.bin
Tagsblackcat, exe, Sphynx

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: bc8832f5a8911a1f6f979cbc37e33689f0066078d88bf5c14df534133175d75f
  • MD5: 2f33382f7d3c45f47ac1c73d7395921a

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: bc8832f5a8911a1f"
        threat_level = "critical"
        first_seen = "2023-09-18"
    condition:
        hash.sha256(0, filesize) == "bc8832f5a8911a1f6f979cbc37e33689f0066078d88bf5c14df534133175d75f"
}

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 bc8832f5a8911a1f6f979cbc37e33689f0066078d88bf5c14df534133175d75f # MD5 2f33382f7d3c45f47ac1c73d7395921a
TypeValueNote
sha256 bc8832f5a8911a1f6f979cbc37e33689f0066078d88bf5c14df534133175d75f Sample:BlackCat
md5 2f33382f7d3c45f47ac1c73d7395921a Sample:BlackCat
Tags
blackcatransomwaremalwarecriticalsha256hash-analizi