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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 59dcfbf61ced41a5f09385cd4a795312a35b5d454064bcf97bb887bbffef8b04. 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 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 59dcfbf61ced41a5f09385cd4a795312a35b5d454064bcf97bb887bbffef8b04
SHA3-384 hash: 733e0c20e13dc08741a69f78cbd84db36d770a67c1284f14f2095e371f6e4c871ca494ec6ff09548bfce5f7aaf535dd5
SHA1 hash: a6240319d5aed0193e51c69d953fb2107c81e69e
MD5 hash: 4bb17c379038b3eb5c12861132e8819a
humanhash: nitrogen-happy-maine-hydrogen
File name:59dcfbf61ced41a5f09385cd4a795312a35b5d454064bcf97bb887bbffef8b04
Download: download sample
Signature GuLoader
Create hunting rule
File size:1'228'600 bytes
First seen:2026-01-09 15:25:13 UTC
Last seen:2026-05-20 17:42:30 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 6e7f9a29f2c85394521a08b9f31f6275 (326 x GuLoader, 65 x AgentTesla, 63 x RemcosRAT)
ssdeep 24576:yTMn6rH75Z2EGuyURQhzRACxeEzpVessMBFa8QRQt5bgw/msswwYz1pWq:yTMn6rHNZ2nuGXsmpV7sMXPQRQt5h3sm
TLSH T173452357792C90C7DD6C0833187B55AF4A327D3EC9982EA723C4B76CA8B11119A1F1FA
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
dhash icon 746c6c6c6c6c6c60 (5 x RemcosRAT, 3 x GuLoader, 1 x NanoCore)
Reporter adrian__luca
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:Separerende
Issuer:Separerende
Algorithm:sha256WithRSAEncryption
Valid from:2025-12-01T04:30:37Z
Valid to:2026-12-01T04:30:37Z
Serial number: 0f91e18d8b890d3926dc84963331a01881ec4f3d
Thumbprint Algorithm:SHA256
Thumbprint: 6575d731c95e6f38cf193f198bdd6802f84ccc5d6a283cb3f8b324034a6120dc
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
3
# of downloads :
129
Origin country :
HU HU
Vendor Threat Intelligence
Malware configuration found for:
GuLoader NSIS
Details
GuLoader
a c2 URL, a useragent string, and a string XOR key
GuLoader
an XOR decryption key and an extracted component
NSIS
extracted archive contents
Link:
https://research.acce.ciphertechsolutions.com/results/2b08ee1d-4df3-4cee-bb91-778070d91cd2/
Malware family:
remcos
Create hunting rule
ID:
1
File name:
Docscan120825.gz
Verdict:
Malicious activity
Analysis date:
2025-12-08 06:33:33 UTC
Tags:
arch-exec remcos rat remote stealer mpress
Link:
https://app.any.run/tasks/adf580dc-e9d9-4fbc-96ce-f83e7ae76a8e

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/48321/
Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=69611e2ff50945831dff4eb1
Tags:
virus agent nsis blic
Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Searching for the window
Creating a file in the %temp% subdirectories
Creating a file
Delayed reading of the file
Unauthorized injection to a recently created process
Restart of the analyzed sample
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug blackhole guloader installer installer installer-heuristic microsoft_visual_cc nsis overlay signed
Link:
https://www.filescan.io/uploads/69611dfe30368802bb7df24b/reports/11423df2-6a4f-480e-a8ad-5282ef7f44e4/overview
Verdict:
Malicious
Labled as:
Trojan/GuLoader
Link:
https://www.hybrid-analysis.com/sample/59dcfbf61ced41a5f09385cd4a795312a35b5d454064bcf97bb887bbffef8b04
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-12-07T23:26:00Z UTC
Last seen:
2026-01-09T16:14:00Z UTC
Hits:
~10000
Detections:
Trojan.Win32.GuLoader.sb Trojan.Win32.Agent.sb HEUR:Trojan-Downloader.Win32.Minix.gen Trojan-Downloader.Win32.Minix.sb Trojan.NSIS.Makoob.sbe Trojan.NSIS.Makoob.sbb Trojan.NSIS.Makoob.sba HEUR:Trojan.Win32.Convagent.gen
Link:
https://opentip.kaspersky.com/59dcfbf61ced41a5f09385cd4a795312a35b5d454064bcf97bb887bbffef8b04/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/79afc6a2-3d52-4026-8d5f-01e1ca2ce29e
Score:
93%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/59dcfbf61ced41a5f09385cd4a795312a35b5d454064bcf97bb887bbffef8b04
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
Executable NSIS Installer PE (Portable Executable) PE File Layout Win 32 Exe x86
Link:
https://app.malva.re/file/4bb17c379038b3eb5c12861132e8819a
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/59dcfbf61ced41a5f09385cd4a795312a35b5d454064bcf97bb887bbffef8b04/
Verdict:
Malicious
Threat:
Family.GULOADER
Link:
https://tip.neiki.dev/file/59dcfbf61ced41a5f09385cd4a795312a35b5d454064bcf97bb887bbffef8b04
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2025-12-08 03:20:20 UTC
File Type:
PE (Exe)
Extracted files:
45
AV detection:
22 of 36 (61.11%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=lhopx5q45va2l4etqxguu6ktckrvwxkfibslz6l3xcd3x77prmca._file
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader discovery downloader
Link:
https://tria.ge/reports/260109-st4mcagv4e/
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Program Files directory
Drops file in Windows directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Contacts third-party web service commonly abused for C2
Loads dropped DLL
Guloader family
Guloader,Cloudeye
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/aee52822-fd8b-48fe-9080-2280bbb1ef40
Unpacked files
SH256 hash:
59dcfbf61ced41a5f09385cd4a795312a35b5d454064bcf97bb887bbffef8b04
MD5 hash:
4bb17c379038b3eb5c12861132e8819a
SHA1 hash:
a6240319d5aed0193e51c69d953fb2107c81e69e
Link:
https://www.unpac.me/results/dfe9f2db-4a94-4f88-bcdd-b82a7f99c631/
SH256 hash:
6bf9cccd8a600f4d442efe201e8c07b49605ba35f49a4b3ab22fa2641748e156
MD5 hash:
48f3e7860e1de2b4e63ec744a5e9582a
SHA1 hash:
420c64d802a637c75a53efc8f748e1aede3d6dc6
Link:
https://www.unpac.me/results/dfe9f2db-4a94-4f88-bcdd-b82a7f99c631/
SH256 hash:
7a9ddee34562cd3703f1502b5c70e99cd5bba15de2b6845a3555033d7f6cb2a5
MD5 hash:
564bb0373067e1785cba7e4c24aab4bf
SHA1 hash:
7c9416a01d821b10b2eef97b80899d24014d6fc1
Link:
https://www.unpac.me/results/dfe9f2db-4a94-4f88-bcdd-b82a7f99c631/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.72
Link:
https://yomi.yoroi.company/submissions/59dcfbf61ced41a5f09385cd4a795312a35b5d454064bcf97bb887bbffef8b04

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:Detect_NSIS_Nullsoft_Installer
Create hunting rule
Author:Obscurity Labs LLC
Description:Detects NSIS installers by .ndata section + NSIS header string
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/48321/

Comments