BlackCat | Threat Level: critical | Type: Ransomware

Cryptographic Identifiers

SHA256df8d000833243acc0004595b3a8d4b66fcd7b76d8685d5c2ff61ee2a40a0e92c
MD5a0cd8aa1cd7cc61d41977cceacd7d4f6
File Typeexe
Size12900.5 KB
First Seen2023-12-15
File Namesch1.exe
Tagsblackcat, exe, HUN, Ransomware

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: df8d000833243acc0004595b3a8d4b66fcd7b76d8685d5c2ff61ee2a40a0e92c
  • MD5: a0cd8aa1cd7cc61d41977cceacd7d4f6

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: df8d000833243acc"
        threat_level = "critical"
        first_seen = "2023-12-15"
    condition:
        hash.sha256(0, filesize) == "df8d000833243acc0004595b3a8d4b66fcd7b76d8685d5c2ff61ee2a40a0e92c"
}

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 df8d000833243acc0004595b3a8d4b66fcd7b76d8685d5c2ff61ee2a40a0e92c # MD5 a0cd8aa1cd7cc61d41977cceacd7d4f6
TypeValueNote
sha256 df8d000833243acc0004595b3a8d4b66fcd7b76d8685d5c2ff61ee2a40a0e92c Sample:BlackCat
md5 a0cd8aa1cd7cc61d41977cceacd7d4f6 Sample:BlackCat
Tags
blackcatransomwaremalwarecriticalsha256hash-analizi