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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 37bce5f200cd3432416d3abecfa403003388efd8b89c8e431d7207e7a8fdd520. 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: 12


Intelligence 12 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 37bce5f200cd3432416d3abecfa403003388efd8b89c8e431d7207e7a8fdd520
SHA3-384 hash: 6b48c6c242fff594ffb51c6c8bdff985017c880ca327bf447c7d4ec4bc8818bb411522ba673dc7d10c53645971f2e0d0
SHA1 hash: 6e6adf392d57a2caa2f364f03a26d575d9499988
MD5 hash: a73ad05c7a904a243569177017cefdc8
humanhash: grey-saturn-ink-dakota
File name:Justificante_4649.js
Download: download sample
Signature GuLoader
Create hunting rule
File size:137'843 bytes
First seen:2026-11-04 10:51:13 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 3072:p3ymTrlmXj+4pSFEAkvyURwDkJQw+j4hcBYkn:p3ym9my4YSA/naQrj4hVkn
TLSH T1B1D35C60CE25127A0F47676CBCA90A61CABDC2098127C4B1F5DD870D62469ECF3FD66E
Magika javascript
Reporter abuse_ch
Tags:GuLoader js

Intelligence

File Origin
# of uploads :
1
# of downloads :
170
Origin country :
SE SE
Vendor Threat Intelligence
No detections
Detection(s):
SecuriteInfo.com.Script.SNH-gen.36128595.UNOFFICIAL
Create hunting rule

Verdict:
Clean
Score:
89.3%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6aeb0e3f3970fcef1e4b0211
Tags:
n/a
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Connection attempt
Using the Windows Management Instrumentation requests
Sending a custom TCP request
Running batch commands
Creating a process with a hidden window
Launching cmd.exe command interpreter
Launching a process
Deleting a recently created file
DNS request
Possible injection to a system process
Creating a file in the Windows directory
Forced shutdown of a system process
Unauthorized injection to a system process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated repaired
Link:
https://www.filescan.io/uploads/6aeb0e2f296a8b3f09b6f174/reports/f64283d5-d4f9-4784-b3d4-a54fca7af568/overview
Verdict:
Malicious
Labled as:
JS/Agent.FIP
Link:
https://www.hybrid-analysis.com/sample/37bce5f200cd3432416d3abecfa403003388efd8b89c8e431d7207e7a8fdd520
Verdict:
Malicious
File Type:
js
First seen:
2026-11-04T05:54:00Z UTC
Last seen:
2026-11-05T06:26:00Z UTC
Hits:
~1000
Link:
https://opentip.kaspersky.com/37bce5f200cd3432416d3abecfa403003388efd8b89c8e431d7207e7a8fdd520/results?tab=lookup
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1998127
Signature
Creates processes via WMI
Found suspicious powershell code related to unpacking or dynamic code loading
Hides threads from debuggers
JavaScript source code contains functionality to generate code involving a shell, file or stream
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Obfuscated command line found
Powershell connects to network
Sigma detected: WScript or CScript Dropper
Suspicious execution chain found
Switches to a custom stack to bypass stack traces
Tries to detect Any.run
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Unusual module load detection (module proxying)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1998127 Sample: Justificante_4649.js Startdate: 04/11/2026 Architecture: WINDOWS Score: 100 27 drive.usercontent.google.com 2->27 29 drive.google.com 2->29 43 Malicious sample detected (through community Yara rule) 2->43 45 Multi AV Scanner detection for submitted file 2->45 47 Yara detected GuLoader 2->47 49 2 other signatures 2->49 9 wscript.exe 1 2->9         started        signatures3 process4 signatures5 51 Wscript starts Powershell (via cmd or directly) 9->51 53 Obfuscated command line found 9->53 55 Windows Scripting host queries suspicious COM object (likely to drop second stage) 9->55 57 2 other signatures 9->57 12 cmd.exe 1 9->12         started        process6 signatures7 59 Wscript starts Powershell (via cmd or directly) 12->59 15 powershell.exe 1 234 12->15         started        19 conhost.exe 12->19         started        21 cmd.exe 1 12->21         started        process8 dnsIp9 31 drive.google.com 142.251.186.113, 443, 49710 GOOGLE-GoogleLLCUS United States 15->31 33 drive.usercontent.google.com 172.253.156.132, 443, 49711 GOOGLE-GoogleLLCUS United States 15->33 35 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 15->35 37 Writes to foreign memory regions 15->37 39 Tries to detect Any.run 15->39 41 5 other signatures 15->41 23 backgroundTaskHost.exe 15->23         started        25 backgroundTaskHost.exe 15->25         started        signatures10 process11
Score:
98%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/37bce5f200cd3432416d3abecfa403003388efd8b89c8e431d7207e7a8fdd520
Verdict:
inconclusive
YARA:
2 match(es)
Tags:
Javascript T1059.007
Link:
https://app.malva.re/file/a73ad05c7a904a243569177017cefdc8
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/37bce5f200cd3432416d3abecfa403003388efd8b89c8e431d7207e7a8fdd520/
Threat name:
Script.Trojan.Multiverze
Create hunting rule
Status:
Malicious
First seen:
2026-11-04 10:52:25 UTC
File Type:
Text (JavaScript)
AV detection:
10 of 24 (41.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=g66ol4qazu2deqlnhk7m7jadaazyr36yxcoi4qy5oid6pkh52uqa._file
Result
Malware family:
n/a
Score:
  10/10
Tags:
defense_evasion discovery execution
Link:
https://tria.ge/reports/261104-mx1f7sby2k/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
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 NtSetInformationThreadHideFromDebugger
Contacts third-party web service commonly abused for C2
Checks QEMU agent file
Badlisted process makes network request
Process spawned unexpected child process
Malware Family:
sagent
Create hunting rule
Malicious:
True
Tags:
javascript
Link:
https://intel.virussign.com/intelligence/file/37bce5f200cd3432416d3abecfa403003388efd8b89c8e431d7207e7a8fdd520
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/37bce5f200cd3432416d3abecfa403003388efd8b89c8e431d7207e7a8fdd520

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:dependsonpythonailib
Create hunting rule
Author:Tim Brown
Description:Hunts for dependencies on Python AI libraries
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.

Comments