GuLoader | Threat Level: medium | Type: Loader

Cryptographic Identifiers

SHA2567fc90eb85088cc5b5d2e1046bec4c53e1bb07c746c2e32582feabd595884f38e
MD572c19d456bd76db580a2b654cef74d5d
File Typejs
Size297.2 KB
First Seen2025-09-18
File NameComprobante de transferencia.js
TagsGuLoader, js

Malware Family: GuLoader

GuLoader, bulut downloader'dır.

TypeLoader
Programming LanguageC
Target PlatformWindows
C2 ProtocolHTTPS
PurposePayload indirme
First Seen Year2019
AliasesCloudEyE

Threat Indicators (IOC)

  • SHA256: 7fc90eb85088cc5b5d2e1046bec4c53e1bb07c746c2e32582feabd595884f38e
  • MD5: 72c19d456bd76db580a2b654cef74d5d

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 GuLoader_SHA256 {
    meta:
        description = "GuLoader sample: 7fc90eb85088cc5b"
        threat_level = "medium"
        first_seen = "2025-09-18"
    condition:
        hash.sha256(0, filesize) == "7fc90eb85088cc5b5d2e1046bec4c53e1bb07c746c2e32582feabd595884f38e"
}

GuLoader — Malware Profile

GuLoader/CloudEyE NSIS/VB dropper. recibo Ispanyolca makbuz. Çift locale tespiti. Registry silme.

Malware Type
Loader
Programming Language
C
C2 Protocol
HTTPS
Target Systems
Windows
Also Known As (AKA)
CloudEyE

Technical Details

Varyanta gore C/C#/VBS/PS1, anti-analysis (VM/debugger check), persistence (Registry/Task Scheduler/Startup folder), payload decryption ve injection (shellcode/PE), fileless execution 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 — GuLoader
# SHA256 7fc90eb85088cc5b5d2e1046bec4c53e1bb07c746c2e32582feabd595884f38e # MD5 72c19d456bd76db580a2b654cef74d5d
TypeValueNote
sha256 7fc90eb85088cc5b5d2e1046bec4c53e1bb07c746c2e32582feabd595884f38e Sample:GuLoader
md5 72c19d456bd76db580a2b654cef74d5d Sample:GuLoader

C2 Servers (4 recorded servers for this family)

Address Type Port Protocol Status Country
45.155.37.29 ip 443 HTTPS inactive RU
onedrive-cloud-storage.com domain 443 HTTPS inactive US
179.60.150.11 ip 80 HTTP inactive SE
185.250.151.13 ip 443 HTTPS inactive DE

C2 addresses are provided only from malware samples manually verified by the KEYDAL team. Commercial use is prohibited.

Tags
guloaderloadermalwaremediumsha256hash-analizi