MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 dd3a09ed97f62ddcb37392273e052fe0aa33bb3b67033e9d90e7be85cb4062a5. 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 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: dd3a09ed97f62ddcb37392273e052fe0aa33bb3b67033e9d90e7be85cb4062a5
SHA3-384 hash: 1208434b19280552be94a1a5a87aed4495438177acef2e7379a9bd16c0538853be12198ef32f8d8e95ba074d56d0a4e0
SHA1 hash: c48be1e85875993e63836251dc0b033c9149c632
MD5 hash: 1b68cd92ebcaa0483256026cbd0bcb01
humanhash: moon-maine-thirteen-ack
File name:UTCB 8578·pdf.js
Download: download sample
Signature GuLoader
Create hunting rule
File size:26'533 bytes
First seen:2026-07-11 07:04:15 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 384:iXMQenTa2e4uJxde0Q4jzVZe5uABIIcZfPZt21mSeIQ+5akjifh6D2RrmXdx6ywW:HT3eEkrWkb31fwgHGDSMialLW5Y0O
TLSH T19FC22E68C71A23392B07138D9C77C53844FBED0985A7A9F063B9726B61235ACE177368
Magika javascript
Reporter abuse_ch
Tags:GuLoader js

Intelligence

File Origin
# of uploads :
1
# of downloads :
140
Origin country :
SE SE
Vendor Threat Intelligence
No detections
Detection(s):
SecuriteInfo.com.VBS.DownLoader.4580.26723.30653.UNOFFICIAL
Create hunting rule

Verdict:
Clean
Score:
89.3%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a51eb6ea900f0e9eb6bfbd2
Tags:
n/a
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
cloudeye fingerprint repaired
Link:
https://www.filescan.io/uploads/6a51eb8c386045fc08ce99e8/reports/423b0117-6681-46a4-8865-8f4b0bd559a6/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/dd3a09ed97f62ddcb37392273e052fe0aa33bb3b67033e9d90e7be85cb4062a5
Verdict:
Malicious
File Type:
js
First seen:
2026-07-10T03:49:00Z UTC
Last seen:
2026-07-13T05:14:00Z UTC
Hits:
~1000
Detections:
HEUR:Trojan.Script.Generic Trojan.JS.SAgent.sb HEUR:Trojan.Script.SAgent.gen
Link:
https://opentip.kaspersky.com/dd3a09ed97f62ddcb37392273e052fe0aa33bb3b67033e9d90e7be85cb4062a5/results?tab=lookup
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1940921
Signature
Found suspicious powershell code related to unpacking or dynamic code loading
Injects code into the Windows Explorer (explorer.exe)
JavaScript source code contains functionality to generate code involving a shell, file or stream
Joe Sandbox ML detected suspicious sample
JScript performs obfuscated calls to suspicious functions
Loading BitLocker PowerShell Module
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Obfuscated command line found
Queries sensitive disk information (via WMI, Win32_DiskDrive, often done to detect virtual machines)
Queries sensitive service information (via WMI, Win32_LogicalDisk, often done to detect sandboxes)
Sigma detected: WScript or CScript Dropper
Switches to a custom stack to bypass stack traces
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
WScript reads language and country specific registry keys (likely country aware script)
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1940921 Sample: UTCB 8578#U00b7pdf.js Startdate: 11/07/2026 Architecture: WINDOWS Score: 100 36 drive.usercontent.google.com 2->36 38 drive.google.com 2->38 54 Malicious sample detected (through community Yara rule) 2->54 56 Multi AV Scanner detection for submitted file 2->56 58 Yara detected GuLoader 2->58 60 4 other signatures 2->60 8 wscript.exe 1 2 2->8         started        12 powershell.exe 15 2->12         started        14 explorer.exe 4 7 2->14         started        16 3 other processes 2->16 signatures3 process4 file5 34 C:\Users\user\AppData\Local\Clit, ASCII 8->34 dropped 62 JScript performs obfuscated calls to suspicious functions 8->62 64 Injects code into the Windows Explorer (explorer.exe) 8->64 66 Windows Scripting host queries suspicious COM object (likely to drop second stage) 8->66 68 WScript reads language and country specific registry keys (likely country aware script) 8->68 18 explorer.exe 8->18         started        70 Writes to foreign memory regions 12->70 72 Found suspicious powershell code related to unpacking or dynamic code loading 12->72 74 Switches to a custom stack to bypass stack traces 12->74 21 dxdiag.exe 12->21         started        23 conhost.exe 12->23         started        25 backgroundTaskHost.exe 12->25         started        30 11 other processes 12->30 76 Obfuscated command line found 14->76 27 powershell.exe 49 14->27         started        signatures6 process7 dnsIp8 44 Obfuscated command line found 18->44 46 Queries sensitive disk information (via WMI, Win32_DiskDrive, often done to detect virtual machines) 21->46 48 Queries sensitive service information (via WMI, Win32_LogicalDisk, often done to detect sandboxes) 21->48 40 drive.usercontent.google.com 142.251.211.225, 443, 49702 GOOGLE-GoogleLLCUS United States 27->40 42 drive.google.com 142.251.211.238, 443, 49701 GOOGLE-GoogleLLCUS United States 27->42 50 Found suspicious powershell code related to unpacking or dynamic code loading 27->50 52 Loading BitLocker PowerShell Module 27->52 32 conhost.exe 27->32         started        signatures9 process10
Score:
99%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/dd3a09ed97f62ddcb37392273e052fe0aa33bb3b67033e9d90e7be85cb4062a5
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/dd3a09ed97f62ddcb37392273e052fe0aa33bb3b67033e9d90e7be85cb4062a5/
Threat name:
Win32.Trojan.CloudEye
Create hunting rule
Status:
Malicious
First seen:
2026-07-10 11:14:21 UTC
File Type:
Text (JavaScript)
AV detection:
8 of 38 (21.05%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=3u5at3mx6yw5zm3tsitt4bjp4cvdhoz3m4bt5hmq467ils2amksq._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
adware discovery execution spyware
Link:
https://tria.ge/reports/260711-hxeghsfw6v/
Behaviour
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: JavaScript
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Contacts third-party web service commonly abused for C2
Drops desktop.ini file(s)
Checks computer location settings
Badlisted process makes network request
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.75
Link:
https://yomi.yoroi.company/submissions/dd3a09ed97f62ddcb37392273e052fe0aa33bb3b67033e9d90e7be85cb4062a5

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