SystemBC | Threat Level: medium | Type: Loader

Cryptographic Identifiers

SHA25677eb3eb81fb496c86ee1578e57ac0251e38540613a3a5a0d5f3d362fa81a693f
MD59ff723d163e9396f0864cdb77508e8f3
File Typeexe
Size408.1 KB
First Seen2023-01-22
File Name9ff723d163e9396f0864cdb77508e8f3.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: 77eb3eb81fb496c86ee1578e57ac0251e38540613a3a5a0d5f3d362fa81a693f
  • MD5: 9ff723d163e9396f0864cdb77508e8f3

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: 77eb3eb81fb496c8"
        threat_level = "medium"
        first_seen = "2023-01-22"
    condition:
        hash.sha256(0, filesize) == "77eb3eb81fb496c86ee1578e57ac0251e38540613a3a5a0d5f3d362fa81a693f"
}

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 77eb3eb81fb496c86ee1578e57ac0251e38540613a3a5a0d5f3d362fa81a693f # MD5 9ff723d163e9396f0864cdb77508e8f3
TypeValueNote
sha256 77eb3eb81fb496c86ee1578e57ac0251e38540613a3a5a0d5f3d362fa81a693f Sample:SystemBC
md5 9ff723d163e9396f0864cdb77508e8f3 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