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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a36b8ba545b0ebe6f3abed5c8edccfdec59d8b889112810f0a46fb0d26a79fb8. 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: 10


Intelligence 10 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a36b8ba545b0ebe6f3abed5c8edccfdec59d8b889112810f0a46fb0d26a79fb8
SHA3-384 hash: 05e0f04e355f21039c02a51dcf3fbd8b8fcdda63b52e3199a8542241d240e40441eebc860274abb57942a8976bcda559
SHA1 hash: 712e562c115782964ec63d38db6e5498fce28f5b
MD5 hash: ab8d8866309aab0801698d430a080202
humanhash: california-oxygen-green-burger
File name:SWIFT_Message.js
Download: download sample
Signature GuLoader
Create hunting rule
File size:91'946 bytes
First seen:2026-10-20 06:55:06 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 1536:osfijGU9nliXvvRXlLIXtDbGWIdp7fFyXNluPL3tmZ0n/E7AQlDELJ4ii:1fy9n4XnX8nGNjfF4luz3t20n/IAQlDx
TLSH T1E7935B70CA65157B4F87BB98BCA80662C67DC314852644F1F6DAC70CA109EECE73929F
Magika javascript
Reporter threatcat_ch
Tags:GuLoader js

Intelligence

File Origin
# of uploads :
1
# of downloads :
198
Origin country :
CH CH
Vendor Threat Intelligence
No detections
Detection(s):
Sanesecurity.Malware.26444.JsHeur.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
70%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6ad7105b5a22ac805bd80f58
Tags:
backdoor shell sage
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
repaired
Link:
https://www.filescan.io/uploads/6ad71058ae05643d129e4848/reports/636f5733-1356-487c-a0a1-ca89505223f5/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/a36b8ba545b0ebe6f3abed5c8edccfdec59d8b889112810f0a46fb0d26a79fb8
Verdict:
Malicious
File Type:
js
First seen:
2026-10-20T01:28:00Z UTC
Last seen:
2026-10-22T05:28:00Z UTC
Hits:
~1000
Link:
https://opentip.kaspersky.com/a36b8ba545b0ebe6f3abed5c8edccfdec59d8b889112810f0a46fb0d26a79fb8/results?tab=lookup
Result
Threat name:
n/a
Detection:
malicious
Classification:
expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1989221
Signature
Antivirus detection for URL or domain
Creates processes via WMI
Found suspicious powershell code related to unpacking or dynamic code loading
Joe Sandbox ML detected suspicious sample
JScript performs obfuscated calls to suspicious functions
Malicious sample detected (through community Yara rule)
Obfuscated command line found
Powershell connects to network
Sigma detected: WScript or CScript Dropper
Suspicious execution chain found
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Wscript starts Powershell (via cmd or directly)
Behaviour
Behavior Graph:
Download SVG
Score:
95%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/a36b8ba545b0ebe6f3abed5c8edccfdec59d8b889112810f0a46fb0d26a79fb8
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a36b8ba545b0ebe6f3abed5c8edccfdec59d8b889112810f0a46fb0d26a79fb8/
Threat name:
Text.Malware.Guloader
Create hunting rule
Status:
Malicious
First seen:
2026-10-20 05:16:05 UTC
AV detection:
2 of 38 (5.26%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=unvyxjkfwdv6n45l5voi5xgp33cz3c4isejicdyki35q2jvht64a._file
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla family:guloader collection defense_evasion discovery downloader execution keylogger privilege_escalation spyware stealer trojan
Link:
https://tria.ge/reports/261020-hpx9naet3z/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
outlook_office_path
Command and Scripting Interpreter: JavaScript
Executes a command shell one-liner
Reads the TCP/IP host and domain name from the registry
System Location Discovery: System Language Discovery
Drops file in Windows directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Accesses Microsoft Outlook profiles
Looks up external IP address via web service
Badlisted process makes network request
Family: AgentTesla
Family: Guloader,Cloudeye
Process spawned unexpected child process
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/a36b8ba545b0ebe6f3abed5c8edccfdec59d8b889112810f0a46fb0d26a79fb8

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:Sus_CMD_Powershell_Usage
Create hunting rule
Author:XiAnzheng
Description:May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)
Rule name:telebot_framework
Create hunting rule
Author:vietdx.mb

File information

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

Malspam

GuLoader

Java Script (JS) js a36b8ba545b0ebe6f3abed5c8edccfdec59d8b889112810f0a46fb0d26a79fb8

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments