Phobos | Threat Level: high | Type: Ransomware

Cryptographic Identifiers

SHA25671b46e95fba31267475537a338f49ce1cd0bc56c0f15346b05b673051cbe90a8
MD58f7bc58c754d6fb7bb0b31fe8a5821e3
File Typeexe
Size57.0 KB
First Seen2023-03-08
File NameWindowsUpdate.bin
TagsPhobos

Malware Family: Phobos

Phobos, RDP ransomware'dir.

TypeRansomware
Programming LanguageC++
Target PlatformWindows
C2 Protocol
PurposeRDP ransomware
First Seen Year2019
AliasesEking

Threat Indicators (IOC)

  • SHA256: 71b46e95fba31267475537a338f49ce1cd0bc56c0f15346b05b673051cbe90a8
  • MD5: 8f7bc58c754d6fb7bb0b31fe8a5821e3

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 Phobos_SHA256 {
    meta:
        description = "Phobos sample: 71b46e95fba31267"
        threat_level = "high"
        first_seen = "2023-03-08"
    condition:
        hash.sha256(0, filesize) == "71b46e95fba31267475537a338f49ce1cd0bc56c0f15346b05b673051cbe90a8"
}

Phobos — Malware Profile

Phobos, 2019 dan beri aktif Dharma kaynakli ransomware ailesidir. AES-256 + RSA-1024 hibrit sifreleme, email bazli fidye iletisimi. RDP brute force ile yayilir. C2 yok.

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

Technical Details

Phobos ransomware emerged in December 2018 as a derivative of Dharma/CrySis ransomware. Encrypts files using AES-256 with RSA-1024 key exchange. Files are renamed with victim ID, attacker email address, and .phobos extension. Distributed primarily through RDP brute force attacks. Deletes volume shadow copies via vssadmin, disables Windows recovery, and terminates backup processes. Adds persistence via HKCU\Software\Microsoft\Windows\CurrentVersion\Run registry key and Startup folder. Contact is exclusively via email embedded in ransom note (no web portal). Variant of Dharma that emerged after its source code leaked on underground forums.

Attribution / Threat Actor

WIZARD SPIDER (related lineage), Dharma/CrySis family

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 — Phobos
# SHA256 71b46e95fba31267475537a338f49ce1cd0bc56c0f15346b05b673051cbe90a8 # MD5 8f7bc58c754d6fb7bb0b31fe8a5821e3
TypeValueNote
sha256 71b46e95fba31267475537a338f49ce1cd0bc56c0f15346b05b673051cbe90a8 Sample:Phobos
md5 8f7bc58c754d6fb7bb0b31fe8a5821e3 Sample:Phobos
Tags
phobosransomwaremalwarehighsha256hash-analizi