GuLoader | Threat Level: medium | Type: Loader

Cryptographic Identifiers

SHA256ef359edd8f7e64c1582b3072a92cf1cc6e1302ec21454b42133ba3a63692e92f
MD5a640f31c4702d7c9dde803304f1c6703
File Typezip
Size1255.4 KB
First Seen2025-09-12
File Namescan.gz
TagsGuLoader, gz, payment, zip

Malware Family: GuLoader

GuLoader, bulut downloader'dır.

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

Threat Indicators (IOC)

  • SHA256: ef359edd8f7e64c1582b3072a92cf1cc6e1302ec21454b42133ba3a63692e92f
  • MD5: a640f31c4702d7c9dde803304f1c6703

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: ef359edd8f7e64c1"
        threat_level = "medium"
        first_seen = "2025-09-12"
    condition:
        hash.sha256(0, filesize) == "ef359edd8f7e64c1582b3072a92cf1cc6e1302ec21454b42133ba3a63692e92f"
}

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 ef359edd8f7e64c1582b3072a92cf1cc6e1302ec21454b42133ba3a63692e92f # MD5 a640f31c4702d7c9dde803304f1c6703
TypeValueNote
sha256 ef359edd8f7e64c1582b3072a92cf1cc6e1302ec21454b42133ba3a63692e92f Sample:GuLoader
md5 a640f31c4702d7c9dde803304f1c6703 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