Cryptographic Identifiers
| SHA256 | e9cef52bf082c87766bbac0b3324c3d76e66e9d5b943e751a04583dc041a0273 |
|---|---|
| MD5 | da0bc578134b0871ce7700c9072d2797 |
| File Type | exe |
| Size | 45.5 KB |
| First Seen | 2023-03-14 |
| File Name | logoff.exe |
| Tags | blackcat, exe, Ransomware |
Malware Family: BlackCat
BlackCat, Rust ile yazılan ransomware'dir.
| Type | Ransomware |
|---|---|
| Programming Language | Rust |
| Target Platform | Windows/Linux |
| C2 Protocol | — |
| Purpose | Çapraz platform ransomware |
| First Seen Year | 2021 |
| Aliases | ALPHV |
Threat Indicators (IOC)
- SHA256:
e9cef52bf082c87766bbac0b3324c3d76e66e9d5b943e751a04583dc041a0273 - MD5:
da0bc578134b0871ce7700c9072d2797
You can verify all hash values of this sample on VirusTotal.
System Cleanup Guide
- Sistemi ağdan DERHAL ayırın — diğer cihazlara yayılmayı durdurun
- Do not pay the ransom — there is no guarantee your files will be restored
- Quarantine the affected drives
- Kullanılan fidye yazılımı ailesini belirleyin (nomoreransom.org)
- Try available decryptor tools (the NoMoreRansom project)
- Report the incident to the authorities (cybercrime unit)
- Temiz bir yedekten kurtarın; yedeğiniz yoksa sürücüyü saklayın
YARA Rule Hints
rule BlackCat_SHA256 {
meta:
description = "BlackCat sample: e9cef52bf082c877"
threat_level = "critical"
first_seen = "2023-03-14"
condition:
hash.sha256(0, filesize) == "e9cef52bf082c87766bbac0b3324c3d76e66e9d5b943e751a04583dc041a0273"
}
BlackCat — Malware Profile
BlackCat, Rust ile yazılan ransomware'dir.
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
IOC List (2 indicators)
# SHA256
e9cef52bf082c87766bbac0b3324c3d76e66e9d5b943e751a04583dc041a0273
# MD5
da0bc578134b0871ce7700c9072d2797
| Type | Value | Note |
|---|---|---|
| sha256 | e9cef52bf082c87766bbac0b3324c3d76e66e9d5b943e751a04583dc041a0273 | Sample:BlackCat |
| md5 | da0bc578134b0871ce7700c9072d2797 | Sample:BlackCat |