HelloKitty | Threat Level: high | Type: Ransomware

Cryptographic Identifiers

SHA256efb40400f8e52cc29b9c6758e6d66406d9a8aabc199d5a403ed74b9a71ebca60
MD53167cd62ad262b8c920fc0fb258a8988
File Typeexe
Size152.4 KB
First Seen2025-04-10
File Nameefb40400f8e52cc29b9c6758e6d66406d9a8aabc199d5a403ed74b9a71ebca60
Tagsexe, HelloKitty, Ransomware

Malware Family: HelloKitty

HelloKitty, CD Projekt Red'e saldırdı.

TypeRansomware
Programming LanguageC++
Target PlatformWindows/Linux
C2 Protocol
PurposeOyun şirketi saldırısı
First Seen Year2020
AliasesFiveHands

Threat Indicators (IOC)

  • SHA256: efb40400f8e52cc29b9c6758e6d66406d9a8aabc199d5a403ed74b9a71ebca60
  • MD5: 3167cd62ad262b8c920fc0fb258a8988

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 HelloKitty_SHA256 {
    meta:
        description = "HelloKitty sample: efb40400f8e52cc2"
        threat_level = "high"
        first_seen = "2025-04-10"
    condition:
        hash.sha256(0, filesize) == "efb40400f8e52cc29b9c6758e6d66406d9a8aabc199d5a403ed74b9a71ebca60"
}

HelloKitty — Malware Profile

HelloKitty (DeathRansom/FiveHands) RaaS. Tor .onion C2. WMI Win32_ShadowCopy silme. VMware ESXi hedefi. CD Projekt Red.

Malware Type
Ransomware
Programming Language
C++
C2 Protocol
Target Systems
Windows/Linux
Also Known As (AKA)
FiveHands

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 — HelloKitty
# SHA256 efb40400f8e52cc29b9c6758e6d66406d9a8aabc199d5a403ed74b9a71ebca60 # MD5 3167cd62ad262b8c920fc0fb258a8988
TypeValueNote
sha256 efb40400f8e52cc29b9c6758e6d66406d9a8aabc199d5a403ed74b9a71ebca60 Sample:HelloKitty
md5 3167cd62ad262b8c920fc0fb258a8988 Sample:HelloKitty
Tags
hellokittyransomwaremalwarehighsha256hash-analizi