SystemBC | Threat Level: medium | Type: Loader

Cryptographic Identifiers

SHA256fb7ce83b1f46d3348eddbe69216889b1547fa349b7ad0973fec5a5156b137d95
MD50f8a225d45dc2dccd1f68f11166ea280
File Typeexe
Size195.0 KB
First Seen2023-02-23
File Name0f8a225d45dc2dccd1f68f11166ea280.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: fb7ce83b1f46d3348eddbe69216889b1547fa349b7ad0973fec5a5156b137d95
  • MD5: 0f8a225d45dc2dccd1f68f11166ea280

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: fb7ce83b1f46d334"
        threat_level = "medium"
        first_seen = "2023-02-23"
    condition:
        hash.sha256(0, filesize) == "fb7ce83b1f46d3348eddbe69216889b1547fa349b7ad0973fec5a5156b137d95"
}

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 fb7ce83b1f46d3348eddbe69216889b1547fa349b7ad0973fec5a5156b137d95 # MD5 0f8a225d45dc2dccd1f68f11166ea280
TypeValueNote
sha256 fb7ce83b1f46d3348eddbe69216889b1547fa349b7ad0973fec5a5156b137d95 Sample:SystemBC
md5 0f8a225d45dc2dccd1f68f11166ea280 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