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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d5b3e78df5fa7fc664c6a518eaa5cc1c85d554f0eac5b4df36e8b253153ebd8f. 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: 8


Intelligence 8 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: d5b3e78df5fa7fc664c6a518eaa5cc1c85d554f0eac5b4df36e8b253153ebd8f
SHA3-384 hash: 0cb6a007cbd1cd697fc680ebac29a294ce0de1770e8d0bffb229ffcf434f1d4d8c658a19ed657a81c5ecb5ed5a5e1b30
SHA1 hash: bf29ee2422c4a9602275f33160ea5106fb38277c
MD5 hash: 79201e7d2530d50cfb7eff7bdf44ec78
humanhash: robert-magnesium-pizza-chicken
File name:Factura n.º 202606.js
Download: download sample
Signature GuLoader
Create hunting rule
File size:105'568 bytes
First seen:2026-11-10 10:25:21 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 1536:AVTw8aLtK1RZSCd5/G/1wWsHDVUHBYkGC0h5UpAJ7TV1My:6YJKfZSCd5CHsHpUZGC0h5U+JV1D
TLSH T1BAA36B30DA26057B4F47BB4CBCA90621CA7C93118527C5B0F69E870D92099ECF77C6AB
Magika javascript
Reporter abuse_ch
Tags:GuLoader js

Intelligence

File Origin
# of uploads :
1
# of downloads :
148
Origin country :
SE SE
Vendor Threat Intelligence
No detections
Verdict:
Malicious
Score:
90.2%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6af2f146463538821bc38eef
Tags:
stration shell sage
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Using the Windows Management Instrumentation requests
Running batch commands
Creating a process with a hidden window
Launching cmd.exe command interpreter
Launching a process
Deleting a recently created file
Sending a custom TCP request
DNS request
Connection attempt
Creating a file in the Windows directory
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/d5b3e78df5fa7fc664c6a518eaa5cc1c85d554f0eac5b4df36e8b253153ebd8f
Verdict:
Malicious
File Type:
js
Link:
https://opentip.kaspersky.com/d5b3e78df5fa7fc664c6a518eaa5cc1c85d554f0eac5b4df36e8b253153ebd8f/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/2003098
Signature
Creates processes via WMI
Found suspicious powershell code related to unpacking or dynamic code loading
JavaScript source code contains functionality to generate code involving a shell, file or stream
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
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: 2003098 Sample: Factura n.#U00ba 202606.js Startdate: 10/11/2026 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 Yara detected GuLoader 2->45 47 JavaScript source code contains functionality to generate code involving a shell, file or stream 2->47 49 Sigma detected: WScript or CScript Dropper 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 1 248 12->15         started        19 conhost.exe 12->19         started        21 cmd.exe 1 12->21         started        process8 dnsIp9 31 drive.usercontent.google.com 142.251.215.225, 443, 49744 GOOGLE-GoogleLLCUS United States 15->31 33 drive.google.com 142.251.215.238, 443, 49743 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 4 other signatures 15->41 23 backgroundTaskHost.exe 15->23         started        25 backgroundTaskHost.exe 15->25         started        signatures10 process11
Verdict:
inconclusive
YARA:
2 match(es)
Tags:
Javascript T1059.007
Link:
https://app.malva.re/file/79201e7d2530d50cfb7eff7bdf44ec78
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/d5b3e78df5fa7fc664c6a518eaa5cc1c85d554f0eac5b4df36e8b253153ebd8f/
Gathering data
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=2wz6pdpv7j74mzgguumovjomdsc5kvhq5lc3jxzw5czfgfj6xwhq._file
Result
Malware family:
n/a
Score:
  10/10
Tags:
defense_evasion discovery execution
Link:
https://tria.ge/reports/261110-mgm6yaef34/
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:
gen3
Create hunting rule
Malicious:
True
Tags:
javascript
Link:
https://intel.virussign.com/intelligence/file/d5b3e78df5fa7fc664c6a518eaa5cc1c85d554f0eac5b4df36e8b253153ebd8f
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: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)

File information

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

Comments