SystemBC | Threat Level: medium | Type: Loader

Cryptographic Identifiers

SHA256b778857f8ecf2ec65eee77cd14acb1fbae86a26764a360e4d0717b7795d155cb
MD5c91f54b62b4f660ed2a72bc217ff8582
File Typeexe
Size310.7 KB
First Seen2022-08-06
File Namec91f54b62b4f660ed2a72bc217ff8582.exe
Tagsexe, signed, SystemBC

Malware Family: SystemBC

SystemBC, SOCKS5 proxy'dir.

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

Threat Indicators (IOC)

  • SHA256: b778857f8ecf2ec65eee77cd14acb1fbae86a26764a360e4d0717b7795d155cb
  • MD5: c91f54b62b4f660ed2a72bc217ff8582

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: b778857f8ecf2ec6"
        threat_level = "medium"
        first_seen = "2022-08-06"
    condition:
        hash.sha256(0, filesize) == "b778857f8ecf2ec65eee77cd14acb1fbae86a26764a360e4d0717b7795d155cb"
}

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 b778857f8ecf2ec65eee77cd14acb1fbae86a26764a360e4d0717b7795d155cb # MD5 c91f54b62b4f660ed2a72bc217ff8582
TypeValueNote
sha256 b778857f8ecf2ec65eee77cd14acb1fbae86a26764a360e4d0717b7795d155cb Sample:SystemBC
md5 c91f54b62b4f660ed2a72bc217ff8582 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