GuLoader | Threat Level: medium | Type: Loader

Cryptographic Identifiers

SHA2563b28354d6c2acf81ff156d06417b729a389ff3aec711bb21f6735f8900867014
MD5a23aa170e907a10108fb73a6ce46f1b7
File Typeexe
Size822.0 KB
First Seen2025-10-09
File Name3b28354d6c2acf81ff156d06417b729a389ff3aec711bb21f6735f8900867014
Tagsexe, GuLoader, signed

Malware Family: GuLoader

GuLoader, bulut downloader'dır.

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

Threat Indicators (IOC)

  • SHA256: 3b28354d6c2acf81ff156d06417b729a389ff3aec711bb21f6735f8900867014
  • MD5: a23aa170e907a10108fb73a6ce46f1b7

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: 3b28354d6c2acf81"
        threat_level = "medium"
        first_seen = "2025-10-09"
    condition:
        hash.sha256(0, filesize) == "3b28354d6c2acf81ff156d06417b729a389ff3aec711bb21f6735f8900867014"
}

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 3b28354d6c2acf81ff156d06417b729a389ff3aec711bb21f6735f8900867014 # MD5 a23aa170e907a10108fb73a6ce46f1b7
TypeValueNote
sha256 3b28354d6c2acf81ff156d06417b729a389ff3aec711bb21f6735f8900867014 Sample:GuLoader
md5 a23aa170e907a10108fb73a6ce46f1b7 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