GuLoader | Threat Level: medium | Type: Loader

Cryptographic Identifiers

SHA2566d9e723e9f1eb4d046a7aa5c468841052b1cf8a0284d0993cb88d155bda810c0
MD5e2db85ecbab6e5240bb9d5d76b0c25f4
File Typejs
Size782.6 KB
First Seen2025-10-01
File Name2025'in son çeyreği.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: 6d9e723e9f1eb4d046a7aa5c468841052b1cf8a0284d0993cb88d155bda810c0
  • MD5: e2db85ecbab6e5240bb9d5d76b0c25f4

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: 6d9e723e9f1eb4d0"
        threat_level = "medium"
        first_seen = "2025-10-01"
    condition:
        hash.sha256(0, filesize) == "6d9e723e9f1eb4d046a7aa5c468841052b1cf8a0284d0993cb88d155bda810c0"
}

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 6d9e723e9f1eb4d046a7aa5c468841052b1cf8a0284d0993cb88d155bda810c0 # MD5 e2db85ecbab6e5240bb9d5d76b0c25f4
TypeValueNote
sha256 6d9e723e9f1eb4d046a7aa5c468841052b1cf8a0284d0993cb88d155bda810c0 Sample:GuLoader
md5 e2db85ecbab6e5240bb9d5d76b0c25f4 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