MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d1a983df0b264704e5c79e46dab5a17c1379a010e93bd610afcce23cd72c05bd. 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: 11

Intelligence 11 IOCs YARA 1 File information Comments

SHA256 hash:	d1a983df0b264704e5c79e46dab5a17c1379a010e93bd610afcce23cd72c05bd
SHA3-384 hash:	04b4e993abd7d88ca16f84cf2bc6dcdabea545f3d032f344c2c91777ddf3469c157dbad48300ced67a45caf19425eb8f
SHA1 hash:	674dc207b3a69619cc09847341421df0c68545fa
MD5 hash:	a99607f9f10448b7f2a89461475cdbb1
humanhash:	florida-fix-solar-zebra
File name:	Payment_Confirmation 900811865 Remittance_Copy_2025-12-11_pdf.js
Download:	download sample
Signature	GuLoader Create hunting rule
File size:	598'327 bytes
First seen:	2025-12-12 23:37:38 UTC
Last seen:	2026-05-20 18:16:16 UTC
File type:	js
MIME type:	text/plain
ssdeep	12288:sKCKLKlJmrKlJSKlJg+IVKlJg+rKlJg+I6KlJg+IUKVKlJg+IBKlJGKlJg+IOKlz:sKCKLKl0rKl8KlxIVKlxrKlxI6KlxIUo
TLSH	T1F5D44A20DD2416B94F071BA9FC541E61CAFC960A552A90F1F6DE070E61069FCE3FE6AC
Magika	javascript
Reporter	cocaman
Tags:	GuLoader js payment

Intelligence

File Origin

# of uploads :

# of downloads :

151

Origin country :

Vendor Threat Intelligence

No detections

Detection(s):

Sanesecurity.Malware.26863.JsHeur.UNOFFICIAL

Verdict:

Malicious

Score:

90.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=693ca770bde6a3e59710e6dc

Tags:

infosteal

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

cloudeye fingerprint masquerade powershell repaired

Link:

https://www.filescan.io/uploads/693ca76e1eac7b9b76a86081/reports/40b8dae4-e6c3-4206-b151-488c12948c3d/overview

Verdict:

Malicious

Labled as:

TrojanDownloader/JS.Netloader

Link:

https://www.hybrid-analysis.com/sample/d1a983df0b264704e5c79e46dab5a17c1379a010e93bd610afcce23cd72c05bd

Verdict:

Malicious

File Type:

text

First seen:

2025-12-12T08:42:00Z UTC

Last seen:

2025-12-14T21:33:00Z UTC

Hits:

~1000

Detections:

Trojan.PowerShell.Strion.sb PDM:Trojan.Win32.Generic Trojan.JS.SAgent.sb HEUR:Trojan.Script.Generic HEUR:Trojan.Script.SAgent.gen

Link:

https://opentip.kaspersky.com/d1a983df0b264704e5c79e46dab5a17c1379a010e93bd610afcce23cd72c05bd/results?tab=lookup

Result

Threat name:

GuLoader

Detection:

malicious

Classification:

troj.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1831923

Signature

Early bird code injection technique detected

Found suspicious powershell code related to unpacking or dynamic code loading

Hides threads from debuggers

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)

Queries sensitive service information (via WMI, Win32_LogicalDisk, often done to detect sandboxes)

Queues an APC in another process (thread injection)

Sigma detected: WScript or CScript Dropper

Switches to a custom stack to bypass stack traces

Unusual module load detection (module proxying)

Windows Scripting host queries suspicious COM object (likely to drop second stage)

Writes to foreign memory regions

Yara detected GuLoader

Yara detected Powershell decode and execute

Behaviour

Behavior Graph:

Download SVG

Score:

90%

Verdict:

Malware

File Type:

SCRIPT

Link:

https://malprob.io/report/d1a983df0b264704e5c79e46dab5a17c1379a010e93bd610afcce23cd72c05bd

Verdict:

inconclusive

YARA:

1 match(es)

Link:

https://app.malva.re/file/a99607f9f10448b7f2a89461475cdbb1

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/d1a983df0b264704e5c79e46dab5a17c1379a010e93bd610afcce23cd72c05bd/

Threat name:

Win32.Trojan.Guloader

Status:

Malicious

First seen:

2025-12-12 12:12:27 UTC

File Type:

Text

AV detection:

12 of 38 (31.58%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=2guyhxylezdqjzohtzdnvnnbpqjxtiaq5e55mefpztrdzvzmaw6q._file

Result

Malware family:

phantom_stealer

Score:

10/10

Tags:

family:phantom_stealer adware collection discovery execution persistence spyware stealer

Link:

https://tria.ge/reports/251212-3mxkkawmb1/

Behaviour

Checks processor information in registry

Enumerates system info in registry

Modifies Internet Explorer settings

Modifies data under HKEY_USERS

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

Uses Task Scheduler COM API

outlook_office_path

outlook_win_path

Command and Scripting Interpreter: JavaScript

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Drops file in Windows directory

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of NtSetInformationThreadHideFromDebugger

Accesses Microsoft Outlook profiles

Legitimate hosting services abused for malware hosting/C2

Looks up external IP address via web service

Checks computer location settings

Badlisted process makes network request

Detects PhantomStealer payload

PhantomStealer

Phantom_stealer family

Malware Config

C2 Extraction:

https://api.telegram.org/bot8585513809:AAEFYenHHus0dFqrslU1Z9hYtRSqY_2rsXY/sendMessage?chat_id=5894397778

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/d1a983df0b264704e5c79e46dab5a17c1379a010e93bd610afcce23cd72c05bd

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)