SystemBC | Threat Level: medium | Type: Loader
Cryptographic Identifiers
| SHA256 | 30fee1328110552c83645241f3ebbfb3e743182c9c08d5259cec20941c5c0f4a |
|---|---|
| MD5 | a50e232d3a5a725cf8324977ce2cc2ec |
| File Type | exe |
| Size | 1222.0 KB |
| First Seen | 2025-01-18 |
| File Name | Croblxn.exe |
| Tags | exe, SystemBC |
Malware Family: SystemBC
SystemBC, SOCKS5 proxy ve C2 dropper'dır.
| Type | Loader |
|---|---|
| Programming Language | C++ |
| Target Platform | Windows |
| C2 Protocol | HTTPS |
| Purpose | SOCKS5 proxy loader |
| First Seen Year | 2019 |
| Aliases | Coroxy |
Threat Indicators (IOC)
- SHA256:
30fee1328110552c83645241f3ebbfb3e743182c9c08d5259cec20941c5c0f4a - MD5:
a50e232d3a5a725cf8324977ce2cc2ec
System Cleanup Guide
- Disconnect the system from the network — the loader may be downloading more malware
- Analyze every downloaded payload
- Inspect all network traffic and cut suspicious connections
- Run a full antivirus scan
- Consider reimaging the system
YARA Rule Hints
rule SystemBC_SHA256 {
meta:
description = "SystemBC sample: 30fee1328110552c"
threat_level = "medium"
first_seen = "2025-01-18"
condition:
hash.sha256(0, filesize) == "30fee1328110552c83645241f3ebbfb3e743182c9c08d5259cec20941c5c0f4a"
}
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
30fee1328110552c83645241f3ebbfb3e743182c9c08d5259cec20941c5c0f4a
# MD5
a50e232d3a5a725cf8324977ce2cc2ec
| Type | Value | Note |
|---|---|---|
| sha256 | 30fee1328110552c83645241f3ebbfb3e743182c9c08d5259cec20941c5c0f4a | |
| md5 | a50e232d3a5a725cf8324977ce2cc2ec |
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.