MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a4d3c4ce266f43e27fb7e52162b1f1f1e68ef944fa30afcd12af191298322eb8. 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

RemcosRAT

Vendor detections: 10

Intelligence 10 IOCs YARA 27 File information Comments

SHA256 hash:	a4d3c4ce266f43e27fb7e52162b1f1f1e68ef944fa30afcd12af191298322eb8
SHA3-384 hash:	4c6ff31fd4e31529413b905929e6f736f845ed8b57ff5447eda63a9efbc679a63845866c556a8548b83f2bb026a4680b
SHA1 hash:	c425e7606d2a32082eb1f7bc597af729c28a4ed3
MD5 hash:	1ff3fa94811ebea121aac27779f0963d
humanhash:	muppet-three-louisiana-mike
File name:	Shipping_Doc_9920_99899_99900w999.PDF.JS
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	5'309'455 bytes
First seen:	2026-10-14 15:12:44 UTC
Last seen:	2026-10-14 15:14:22 UTC
File type:	js
MIME type:	text/plain
ssdeep	98304:avBOF+MLhUPMHPygVJJwuk1H9MUPYi+lW923SffE+xLOtevSuEGP2kriAVtemcXe:yBOF+MLhUkKgVfwh1dMbLlcmSk+xSteP
TLSH	T11B3692511741BD32B620575C4A36AAE0B58AA21F40C9CFE631ACF11E7F9CC27D359AF2
Magika	javascript
Reporter	TomU
Tags:	js RemcosRAT

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

Vendor Threat Intelligence

No detections

Detection(s):

Sanesecurity.Rogue.0hr.20260930-1535.UNOFFICIAL

SecuriteInfo.com.JS.DownLoader.10909.11374.23383.UNOFFICIAL

Verdict:

Malicious

Score:

99.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6ad1469d6f551121ba165796

Tags:

virus rogue blic

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-debug downloader dropper evasive masquerade obfuscated packed repaired

Link:

https://www.filescan.io/uploads/6acf9c1c0ddf906851a8ee37/reports/1ffb5c68-0253-400c-9ac0-74a1a5e91aa8/overview

Verdict:

Unknown

Link:

https://www.hybrid-analysis.com/sample/a4d3c4ce266f43e27fb7e52162b1f1f1e68ef944fa30afcd12af191298322eb8

Verdict:

Malicious

File Type:

text.utf8

First seen:

2026-09-02T21:45:00Z UTC

Last seen:

2026-10-16T11:58:00Z UTC

Hits:

~1000

Link:

https://opentip.kaspersky.com/a4d3c4ce266f43e27fb7e52162b1f1f1e68ef944fa30afcd12af191298322eb8/results?tab=lookup

Gathering data

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/a4d3c4ce266f43e27fb7e52162b1f1f1e68ef944fa30afcd12af191298322eb8/

Threat name:

Script-JS.Trojan.AgentTesla

Status:

Malicious

First seen:

2026-09-04 00:58:00 UTC

File Type:

Text (JavaScript)

AV detection:

12 of 36 (33.33%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=utj4jtrgn5b6e75x4uqwfmpr6hti56ke7iyk7tisv4mrfgbsf24a._file

Verdict:

malicious

Label(s):

DonutLoader

Remcos

Link:

https://reports.threatray.com/6ba2d5de-c14a-4a76-bbf8-a3ff45507166

Result

Malware family:

donutloader

Score:

10/10

Tags:

family:donutloader discovery execution loader

Link:

https://tria.ge/reports/261014-slvdpsw1at/

Behaviour

Modifies registry class

Suspicious use of WriteProcessMemory

Command and Scripting Interpreter: JavaScript

Enumerates physical storage devices

Reads the TCP/IP host and domain name from the registry

System Network Configuration Discovery: Internet Connection Discovery

Checks computer location settings

Executes dropped EXE

Detects DonutLoader

Family: DonutLoader

Malware family:

DonutLoader

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/a4d3c4ce266f/report/overview.html

Please note that we are no longer able to provide a coverage score for Virus Total.

Threat name:

Suspicious File

Score:

0.55

Link:

https://yomi.yoroi.company/submissions/a4d3c4ce266f43e27fb7e52162b1f1f1e68ef944fa30afcd12af191298322eb8

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:	cobalt_strike_tmp01925d3f Create hunting rule
Author:	The DFIR Report
Description:	files - file ~tmp01925d3f.exe
Reference:	https://thedfirreport.com

Rule name:	CP_Script_Inject_Detector Create hunting rule
Author:	DiegoAnalytics
Description:	Detects attempts to inject code into another process across PE, ELF, Mach-O binaries

Rule name:	DebuggerCheck__API Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	DetectEncryptedVariants Create hunting rule
Author:	Zinyth
Description:	Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded

Rule name:	Disable_Defender Create hunting rule
Author:	iam-py-test
Description:	Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen

Rule name:	golang_bin_JCorn_CSC846 Create hunting rule
Author:	Justin Cornwell
Description:	CSC-846 Golang detection ruleset

Rule name:	INDICATOR_SUSPICIOUS_Binary_References_Browsers Create hunting rule
Author:	ditekSHen
Description:	Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

Rule name:	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM Create hunting rule
Author:	ditekSHen
Description:	Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)

Rule name:	MULTI_Malware_AgentTesla_ForgeAuto_ed343f78_Extrait Create hunting rule
Author:	Marjoriefort
Description:	Detects AgentTesla (inconnu, etat extrait)

Rule name:	pe_detect_tls_callbacks Create hunting rule

Rule name:	pe_no_import_table Create hunting rule
Description:	Detect pe file that no import table

Rule name:	REMCOS_RAT_variants Create hunting rule

Rule name:	Remcos_unpacked_PulseIntel Create hunting rule
Author:	PulseIntel
Description:	Remcos Payload

Rule name:	SUSP_Script_PowerShell_Hidden_Launcher Create hunting rule
Author:	Marjoriefort
Description:	Script (JS/VBS) lancant PowerShell en mode furtif - dropper frais MalwareBazaar
Reference:	Veille fraicheur 2026-09-14 / cluster misses web

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:	ThreadControl__Context Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	TigerRAT_pe_yaraify Create hunting rule
Author:	hunts-yara-code
Description:	YARAify-tightened byte rule from 9 sample(s) -- VERIFY hits

Rule name:	VECT_Ransomware Create hunting rule
Author:	Mustafa Bakhit
Description:	Detects activity associated with VECT ransomware. This includes registry modifications and deletions, execution of system and defense-evasion commands, suspicious API usage, mutex creation, file and memory manipulation, ransomware note generation, anti-debugging and anti-analysis techniques, and embedded cryptographic constants (SHA256) characteristic of this malware family. Designed for threat intelligence and malware detection environments.

Rule name:	Windows_Trojan_Remcos_921ef449 Create hunting rule
Author:	Elastic Security

Rule name:	Windows_Trojan_Remcos_b296e965 Create hunting rule
Author:	Elastic Security
Reference:	https://www.elastic.co/security-labs/exploring-the-ref2731-intrusion-set

Rule name:	Win_Clipboard_Clipper_Thengavar Create hunting rule
Author:	Thengavar
Description:	Detects malware manipulating the Windows clipboard for clipping or crypto stealing attacks

Rule name:	WIN_Malware_Unknown_ForgeAuto_2ffc3572 Create hunting rule
Author:	Marjoriefort
Description:	Detects Unknown (pe, etat binaire)

Rule name:	WIN_Malware_Unknown_ForgeAuto_74566f98 Create hunting rule
Author:	Marjoriefort
Description:	Detects Unknown (pe, etat binaire)

Rule name:	WIN_Malware_Unknown_ForgeAuto_79234c04 Create hunting rule
Author:	Marjoriefort
Description:	Detects Unknown (pe, etat binaire)

Rule name:	win_remcos_rat_unpacked Create hunting rule
Author:	Matthew @ Embee_Research
Description:	Detects strings present in remcos rat Samples.

Rule name:	win_remcos_w0 Create hunting rule
Author:	Matthew @ Embee_Research
Description:	Detects strings present in remcos rat Samples.

Rule name:	yarahub_win_remcos_rat_unpacked_aug_2023 Create hunting rule
Author:	Matthew @ Embee_Research

File information

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

Malspam

RemcosRAT

js a4d3c4ce266f43e27fb7e52162b1f1f1e68ef944fa30afcd12af191298322eb8

(this sample)

Delivery method

Distributed via e-mail attachment

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