BlackCat | Threat Level: critical | Type: Ransomware

Cryptographic Identifiers

SHA2565121f08cf8614a65d7a86c2f462c0694c132e2877a7f54ab7fcefd7ee5235a42
MD5843001980e5073c7f0ea8b56873246b8
File Typeelf
Size1877.5 KB
First Seen2021-12-24
File Name5121f08cf8614a65d7a86c2f462c0694c132e2877a7f54ab7fcefd7ee5235a42
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: 5121f08cf8614a65d7a86c2f462c0694c132e2877a7f54ab7fcefd7ee5235a42
  • MD5: 843001980e5073c7f0ea8b56873246b8

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: 5121f08cf8614a65"
        threat_level = "critical"
        first_seen = "2021-12-24"
    condition:
        hash.sha256(0, filesize) == "5121f08cf8614a65d7a86c2f462c0694c132e2877a7f54ab7fcefd7ee5235a42"
}

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 5121f08cf8614a65d7a86c2f462c0694c132e2877a7f54ab7fcefd7ee5235a42 # MD5 843001980e5073c7f0ea8b56873246b8
TypeValueNote
sha256 5121f08cf8614a65d7a86c2f462c0694c132e2877a7f54ab7fcefd7ee5235a42 Sample:BlackCat
md5 843001980e5073c7f0ea8b56873246b8 Sample:BlackCat
Tags
blackcatransomwaremalwarecriticalsha256hash-analizi