SystemBC | Threat Level: medium | Type: Loader

Cryptographic Identifiers

SHA256e21f50a1794acd0a585c86a157e8f70b044adcc860d6d0648d874deccd7ba653
MD5b5299c6348f7c4e483e5a41ce4c12c5a
File Typeexe
Size5274.3 KB
First Seen2023-01-24
File Nameb5299c6348f7c4e483e5a41ce4c12c5a.exe
Tagsexe, SystemBC

Malware Family: SystemBC

SystemBC, SOCKS5 proxy ve C2 dropper'dır.

TypeLoader
Programming LanguageC++
Target PlatformWindows
C2 ProtocolHTTPS
PurposeSOCKS5 proxy loader
First Seen Year2019
AliasesCoroxy

Threat Indicators (IOC)

  • SHA256: e21f50a1794acd0a585c86a157e8f70b044adcc860d6d0648d874deccd7ba653
  • MD5: b5299c6348f7c4e483e5a41ce4c12c5a

You can verify all hash values of this sample on VirusTotal.

System Cleanup Guide

  1. Disconnect the system from the network — the loader may be downloading more malware
  2. Analyze every downloaded payload
  3. Inspect all network traffic and cut suspicious connections
  4. Run a full antivirus scan
  5. Consider reimaging the system

YARA Rule Hints

rule SystemBC_SHA256 {
    meta:
        description = "SystemBC sample: e21f50a1794acd0a"
        threat_level = "medium"
        first_seen = "2023-01-24"
    condition:
        hash.sha256(0, filesize) == "e21f50a1794acd0a585c86a157e8f70b044adcc860d6d0648d874deccd7ba653"
}

SystemBC — Malware Profile

SystemBC proxy botnet. Embedded TLS private key BEGIN/END PRIVATE KEY PEM. Tor SOCKS5 proxy tunnel. Used by Ryuk/Conti/DoppelPaymer ransomware for C2 tunneling.

Malware Type
Loader
Programming Language
C++
C2 Protocol
HTTPS
Target Systems
Windows
Also Known As (AKA)
Coroxy

Technical Details

Backdoor ailesi: TCP/HTTP C2, gizli uzak erisim, kalicilik mekanizmasi (servis/Registry), shell komutu calistirma, dosya transfer, anti-forensic teknikleri

Capabilities & Behavior

Payload İndirme
Süreç Enjeksiyonu
Modüler Mimari
Kimlik Bilgisi Hırsızlığı
Yanal Hareket
Kalıcılık
Anti-VM/Sandbox
İkincil Payload Dağıtımı

IOC List (2 indicators)

IOC — SystemBC
# SHA256 e21f50a1794acd0a585c86a157e8f70b044adcc860d6d0648d874deccd7ba653 # MD5 b5299c6348f7c4e483e5a41ce4c12c5a
TypeValueNote
sha256 e21f50a1794acd0a585c86a157e8f70b044adcc860d6d0648d874deccd7ba653 Sample:SystemBC
md5 b5299c6348f7c4e483e5a41ce4c12c5a Sample:SystemBC

C2 Servers (1 recorded servers for this family)

Address Type Port Protocol Status Country
134.255.218.162 ip 4001 TCP inactive LV

C2 addresses are provided only from malware samples manually verified by the KEYDAL team. Commercial use is prohibited.

Tags
systembcloadermalwaremediumsha256hash-analizi