Phobos | Threat Level: high | Type: Ransomware

Cryptographic Identifiers

SHA256667f88e8dcd4a15529ed02bb20da6ae2e5b195717eb630b20b9732c8573c4e83
MD56dbdd1efcab25eaaec2217e9bcbf0718
File Typedoc
Size234.5 KB
First Seen2020-09-11
File Name6dbdd1efcab25eaaec2217e9bcbf0718.doc
Tagsdoc, Loader, Phobos, Ransomware

Malware Family: Phobos

Phobos, RDP ransomware'dir.

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

Threat Indicators (IOC)

  • SHA256: 667f88e8dcd4a15529ed02bb20da6ae2e5b195717eb630b20b9732c8573c4e83
  • MD5: 6dbdd1efcab25eaaec2217e9bcbf0718

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: 667f88e8dcd4a155"
        threat_level = "high"
        first_seen = "2020-09-11"
    condition:
        hash.sha256(0, filesize) == "667f88e8dcd4a15529ed02bb20da6ae2e5b195717eb630b20b9732c8573c4e83"
}

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 667f88e8dcd4a15529ed02bb20da6ae2e5b195717eb630b20b9732c8573c4e83 # MD5 6dbdd1efcab25eaaec2217e9bcbf0718
TypeValueNote
sha256 667f88e8dcd4a15529ed02bb20da6ae2e5b195717eb630b20b9732c8573c4e83 Sample:Phobos
md5 6dbdd1efcab25eaaec2217e9bcbf0718 Sample:Phobos
Tags
phobosransomwaremalwarehighsha256hash-analizi