MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d62df4ba5f0d91a4380436b05302e0b89388f058825a91f5ff756b96a9acdd5f. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry



GuLoader


Vendor detections: 15


Intelligence 15 IOCs YARA 4 File information Comments

SHA256 hash: d62df4ba5f0d91a4380436b05302e0b89388f058825a91f5ff756b96a9acdd5f
SHA3-384 hash: 87004fe59aef3f843237dd0a757c5652140584cf8c8dfe9f8240e1a01335c8f12a46b1cb25384fdc86d60df79f337a31
SHA1 hash: be65f7fd0293b311c85de6896b32785a9e37c544
MD5 hash: 158003b5e5802fa7d96449a8c76b4b3d
humanhash: spring-princess-avocado-virginia
File name:r09485766-202509240011173645.exe
Download: download sample
Signature GuLoader
File size:991'080 bytes
First seen:2025-09-24 11:00:11 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 9a16e282eba7cc710070c0586c947693 (26 x GuLoader, 11 x VIPKeylogger, 7 x RemcosRAT)
ssdeep 24576:HTzSQXAdMOz1QkWf4lhLeB+k/V4KRUMfzKXlxJRrhLH:zzrAGOC+DqB+kaKRUMLKVXRNb
Threatray 1'411 similar samples on MalwareBazaar
TLSH T14D25232016F1BC62C51DA8B0D05E170BAEB6CE2254A4BF62FB44F5D6F1F48A7D92D603
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10522/11/4)
9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.8% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika pebin
Reporter FXOLabs
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:Reagans
Issuer:Reagans
Algorithm:sha256WithRSAEncryption
Valid from:2025-07-29T02:19:03Z
Valid to:2026-07-29T02:19:03Z
Serial number: 3d6ab93a06fca1ec59e2a10eb63b6981124a7ceb
Thumbprint Algorithm:SHA256
Thumbprint: 54c7ce1812ed1a1ea9b6a61cc74c324a1a162d8bda0bd56435068488f9dda44e
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence


File Origin
# of uploads :
1
# of downloads :
116
Origin country :
BR BR
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
r09485766-202509240011173645.exe
Verdict:
Malicious activity
Analysis date:
2025-09-24 11:02:03 UTC
Tags:
evasion stealer ultravnc rmm-tool exfiltration smtp

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
99.1%
Tags:
obfuscate xtreme virus nsis
Result
Verdict:
Suspicious
Maliciousness:

Behaviour
Creating a window
Searching for the window
Creating a file
Creating a file in the %temp% directory
Launching a process
Creating a process with a hidden window
Using the Windows Management Instrumentation requests
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug blackhole installer microsoft_visual_cc nsis overlay signed
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-09-24T05:18:00Z UTC
Last seen:
2025-09-24T05:18:00Z UTC
Hits:
~10
Detections:
HEUR:Trojan.NSIS.Kryptik.gen Trojan.NSIS.Makoob.sbe Trojan.NSIS.Makoob.sba
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
Executable NSIS Installer PE (Portable Executable) PE File Layout Win 32 Exe x86
Threat name:
Win32.Trojan.GuLoader
Status:
Malicious
First seen:
2025-09-24 11:00:59 UTC
File Type:
PE (Exe)
Extracted files:
11
AV detection:
18 of 24 (75.00%)
Threat level:
  5/5
Result
Malware family:
agenttesla
Score:
  10/10
Tags:
family:agenttesla discovery installer keylogger spyware stealer trojan
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Windows directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Badlisted process makes network request
Looks up external IP address via web service
Checks computer location settings
AgentTesla
Agenttesla family
Verdict:
Malicious
Tags:
loader guloader
YARA:
NSIS_GuLoader_July_2024
Unpacked files
SH256 hash:
d62df4ba5f0d91a4380436b05302e0b89388f058825a91f5ff756b96a9acdd5f
MD5 hash:
158003b5e5802fa7d96449a8c76b4b3d
SHA1 hash:
be65f7fd0293b311c85de6896b32785a9e37c544
Please note that we are no longer able to provide a coverage score for Virus Total.

YARA Signatures


MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:CP_AllMal_Detector
Author:DiegoAnalytics
Description:CrossPlatform All Malwares Detector: Detect PE, ELF, Mach-O, scripts, archives; overlay, obfuscation, encryption, spoofing, hiding, high entropy, network communication
Rule name:Ins_NSIS_Buer_Nov_2020_1
Author:Arkbird_SOLG
Description:Detect NSIS installer used for Buer loader
Rule name:PE_Digital_Certificate
Author:albertzsigovits
Rule name:shellcode
Author:nex
Description:Matched shellcode byte patterns

File information


The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

GuLoader

Executable exe d62df4ba5f0d91a4380436b05302e0b89388f058825a91f5ff756b96a9acdd5f

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments