SystemBC | Threat Level: medium | Type: Loader

Cryptographic Identifiers

SHA256938deb1fb95c5990b581fd5b988f8d5a980d0f4a117cc6957012602f0196987d
MD57cbf389b3d3d7d0ac4fb9d1652c9b427
File Typeexe
Size1324.7 KB
First Seen2023-02-23
File Name7cbf389b3d3d7d0ac4fb9d1652c9b427.exe
Tagsexe, signed, 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: 938deb1fb95c5990b581fd5b988f8d5a980d0f4a117cc6957012602f0196987d
  • MD5: 7cbf389b3d3d7d0ac4fb9d1652c9b427

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: 938deb1fb95c5990"
        threat_level = "medium"
        first_seen = "2023-02-23"
    condition:
        hash.sha256(0, filesize) == "938deb1fb95c5990b581fd5b988f8d5a980d0f4a117cc6957012602f0196987d"
}

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 938deb1fb95c5990b581fd5b988f8d5a980d0f4a117cc6957012602f0196987d # MD5 7cbf389b3d3d7d0ac4fb9d1652c9b427
TypeValueNote
sha256 938deb1fb95c5990b581fd5b988f8d5a980d0f4a117cc6957012602f0196987d Sample:SystemBC
md5 7cbf389b3d3d7d0ac4fb9d1652c9b427 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