GuLoader | Threat Level: medium | Type: Loader

Cryptographic Identifiers

SHA25654d1b412c756fa7c8ea26801ec08823a94603078a46b701b7ef5e4484d472fe0
MD5a90838a59c74be0f3f13fc4d1578b01d
File Typeexe
Size501.2 KB
First Seen2025-08-27
File Namescan_0827.exe
Tagsexe, GuLoader

Malware Family: GuLoader

GuLoader, bulut downloader'dır.

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

Threat Indicators (IOC)

  • SHA256: 54d1b412c756fa7c8ea26801ec08823a94603078a46b701b7ef5e4484d472fe0
  • MD5: a90838a59c74be0f3f13fc4d1578b01d

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: 54d1b412c756fa7c"
        threat_level = "medium"
        first_seen = "2025-08-27"
    condition:
        hash.sha256(0, filesize) == "54d1b412c756fa7c8ea26801ec08823a94603078a46b701b7ef5e4484d472fe0"
}

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 54d1b412c756fa7c8ea26801ec08823a94603078a46b701b7ef5e4484d472fe0 # MD5 a90838a59c74be0f3f13fc4d1578b01d
TypeValueNote
sha256 54d1b412c756fa7c8ea26801ec08823a94603078a46b701b7ef5e4484d472fe0 Sample:GuLoader
md5 a90838a59c74be0f3f13fc4d1578b01d 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