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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 644da583d8d3f206e89c64dd5373610cc0c474251982dfd952bb79ba7f3fd954. 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: 9


Intelligence 9 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 644da583d8d3f206e89c64dd5373610cc0c474251982dfd952bb79ba7f3fd954
SHA3-384 hash: 7cef9fafe07157734e2d8ec971a9a67034b90ec75db94b361f899e7a39a06695dba49e1b515ad8b24caf106d22e45040
SHA1 hash: 987c794242e06cdeda7cb43a01e7414e150df436
MD5 hash: e79380c54dbdd6a388b74e70d3f0547c
humanhash: virginia-magnesium-six-uniform
File name:JUSTIFICANTEXPAGOX-768322378909.rar
Download: download sample
Signature GuLoader
Create hunting rule
File size:619'599 bytes
First seen:2026-05-20 17:45:22 UTC
Last seen:Never
File type: rar
MIME type:application/x-rar
ssdeep 12288:D7tCdlbjVHcMSQic99qxK9GHBK3HUwrPgGlL7uip/LQfMs385JeXo9nN2:OlbZHcMSBK9OBU0alLiUDQ385NO
TLSH T100D423BA4DF9038BDD1F2AE7DE74AD1AE0E12E414CEF2E1D4A7950650236278E7E54C0
TrID 61.5% (.RAR) RAR compressed archive (v5.0) (8000/1)
38.4% (.RAR) RAR compressed archive (gen) (5000/1)
Magika rar
Reporter TomU
Tags:GuLoader rar

Intelligence

File Origin
# of uploads :
1
# of downloads :
25
Origin country :
CH CH
File Archive Information

This file archive contains 1 file(s), sorted by their relevance:

File name:JUSTIFICANTE PAGO -768322378909.exe
File size:778'848 bytes
SHA256 hash: f2a14ab6b9d45255710fe9541e761de772ba40370628d6608914e6d47cffba9f
MD5 hash: 79780fb926998227f45e12ae6f50718a
MIME type:application/x-dosexec
Signature GuLoader
Vendor Threat Intelligence
Details
Link:
https://research.acce.ciphertechsolutions.com/results/ba6f0515-8c1c-4203-8132-02fe8049ddc5/
Detection(s):
SecuriteInfo.com.Win32.Malware-gen.34143975.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a0e04274f2b29ce0402055f
Tags:
injection obfusc virus
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug evasive expired-cert installer installer installer-heuristic microsoft_visual_cc nsis reconnaissance signed
Link:
https://www.filescan.io/uploads/6a0df885efbd399b39c020d8/reports/856caee1-7adb-4ee3-84be-754c4e1bd9f7/overview
Verdict:
Suspicious
Labled as:
Mal/DrodRar
Link:
https://www.hybrid-analysis.com/sample/644da583d8d3f206e89c64dd5373610cc0c474251982dfd952bb79ba7f3fd954
Verdict:
Malicious
File Type:
rar
First seen:
2025-04-09T07:07:00Z UTC
Last seen:
2026-05-19T09:46:00Z UTC
Hits:
~1000
Link:
https://opentip.kaspersky.com/644da583d8d3f206e89c64dd5373610cc0c474251982dfd952bb79ba7f3fd954/results?tab=lookup
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/644da583d8d3f206e89c64dd5373610cc0c474251982dfd952bb79ba7f3fd954/
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2025-04-09 11:03:46 UTC
AV detection:
16 of 24 (66.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=mrg2la6y2pzan2e4mtovg43bbtami5bfdgbn7wksxn43u7z73fka._file
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/644da583d8d3f206e89c64dd5373610cc0c474251982dfd952bb79ba7f3fd954

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
Rule name:VECT_Ransomware
Create hunting rule
Author:Mustafa Bakhit
Description:Detects activity associated with VECT ransomware. This includes registry modifications and deletions, execution of system and defense-evasion commands, suspicious API usage, mutex creation, file and memory manipulation, ransomware note generation, anti-debugging and anti-analysis techniques, and embedded cryptographic constants (SHA256) characteristic of this malware family. Designed for threat intelligence and malware detection environments.

File information

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

Malspam

GuLoader

rar 644da583d8d3f206e89c64dd5373610cc0c474251982dfd952bb79ba7f3fd954

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments