MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3a71b1093e376997406e974deda12cfec19e4e77dfbd6a54c08be56d1a729d6c. 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: 15

Intelligence 15 IOCs YARA 33 File information Comments

SHA256 hash:	3a71b1093e376997406e974deda12cfec19e4e77dfbd6a54c08be56d1a729d6c
SHA3-384 hash:	70a78c1a6b576a7797722cc1322f2404acd44c5ffc226b446f9d2640600198caafba2749d79d6fc6b0562b1bc8c638b4
SHA1 hash:	4ec9f60177213d8ce63cabf8aa44a394babd52e2
MD5 hash:	df75bbc3e686b7b380260949f64948cb
humanhash:	alpha-jig-edward-harry
File name:	AWB.js
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	4'084'428 bytes
First seen:	2026-11-10 17:28:29 UTC
Last seen:	Never
File type:	js
MIME type:	text/plain
ssdeep	98304:DQworKiNDzfdG2BcfDdc65G/qeMacUZZmuqUftERSEaHROIH0zkjNm4FaIGVizV1:DQXKiNDRF9VfjHRlUzeFaFQrdfDvGK3l
TLSH	T19C16C51FEBA04E5E30DD3EDD5E52C1E49ECFB6A6C049DEC37261915EA3D449108A23B2
Magika	css
Reporter	abuse_ch
Tags:	js RAT RemcosRAT

Intelligence

File Origin

# of uploads :

# of downloads :

180

Origin country :

Vendor Threat Intelligence

No detections

Verdict:

Malicious

Score:

92.5%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6af3546cbeffd05f052ac482

Tags:

vmdetect autoit proxy java

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Creating a file

Sending a custom TCP request

Creating synchronization primitives

Deleting a recently created file

Creating a process with a hidden window

Connection attempt

Reading critical registry keys

Launching a service

Creating a process from a recently created file

Stealing user critical data

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-debug autoit dropper evasive expired-cert fingerprint keylogger obfuscated obfuscated packed reconnaissance repaired

Link:

https://www.filescan.io/uploads/6af3546a0257ea0e387a32ee/reports/24061e8f-079d-4b45-ae12-c6012d2a329e/overview

Verdict:

Unknown

Link:

https://www.hybrid-analysis.com/sample/3a71b1093e376997406e974deda12cfec19e4e77dfbd6a54c08be56d1a729d6c

Verdict:

Malicious

File Type:

Link:

https://opentip.kaspersky.com/3a71b1093e376997406e974deda12cfec19e4e77dfbd6a54c08be56d1a729d6c/results?tab=lookup

Result

Threat name:

Remcos, DonutLoader

Detection:

malicious

Classification:

evad.troj.spyw.expl

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/2003524

Signature

Benign windows process drops PE files

C2 URLs / IPs found in malware configuration

Contains functionality to steal Internet Explorer form passwords

Detected Remcos RAT

Found malware configuration

JavaScript file contains suspicious strings

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Sigma detected: Remcos

Sigma detected: WScript or CScript Dropper

Tries to harvest and steal browser information (history, passwords, etc)

Unusual module load detection (module proxying)

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

WScript reads language and country specific registry keys (likely country aware script)

Yara detected DonutLoader

Yara detected Remcos RAT

Yara detected UAC Bypass using CMSTP

Behaviour

Behavior Graph:

Download SVG

Score:

97%

Verdict:

Malware

File Type:

SCRIPT

Link:

https://malprob.io/report/3a71b1093e376997406e974deda12cfec19e4e77dfbd6a54c08be56d1a729d6c

Verdict:

Malware

YARA:

1 match(es)

Tags:

ADODB.Stream Javascript JS Emulation Trace MSXML2.DOMDocument.3.0 Scripting.FileSystemObject Shell.Application T1059.007 T1105 WScript.Shell

Link:

https://app.malva.re/file/df75bbc3e686b7b380260949f64948cb

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/3a71b1093e376997406e974deda12cfec19e4e77dfbd6a54c08be56d1a729d6c/

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=hjy3ccj6g5uzoqdos5g63ijm73az4ttx366wuvgarpsw2gtstvwa._file

Verdict:

malicious

Label(s):

DonutLoader

Link:

https://reports.threatray.com/3cdd0b36-b348-4735-bac6-b6f84610561f

Result

Malware family:

remcos

Score:

10/10

Tags:

family:donutloader family:remcos botnet:remote collection discovery execution loader persistence ransomware rat spyware stealer

Link:

https://tria.ge/reports/261110-v2lgvab17y/

Behaviour

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Uses Volume Shadow Copy WMI provider

Uses Volume Shadow Copy service COM API

outlook_office_path

Command and Scripting Interpreter: JavaScript

Enumerates physical storage devices

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

System Location Discovery: System Language Discovery

Accesses Microsoft Outlook profiles

Checks installed software on the system

Checks computer location settings

Executes dropped EXE

Loads dropped DLL

Reads user/profile data of web browsers

Detects DonutLoader

Family: DonutLoader

Family: Remcos

Malware Config

C2 Extraction:

196.251.102.59:8080

Malware Family:

modiloader

Malicious:

True

Tags:

Link:

https://intel.virussign.com/intelligence/file/3a71b1093e376997406e974deda12cfec19e4e77dfbd6a54c08be56d1a729d6c

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/3a71b1093e376997406e974deda12cfec19e4e77dfbd6a54c08be56d1a729d6c

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:	exploit_any_poppopret Create hunting rule
Author:	Jeff White [karttoon@gmail.com] @noottrak
Description:	Identify POP -> POP -> RET opcodes for quick ROP Gadget creation in target binaries.

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:	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 Create hunting rule
Author:	kevoreilly
Description:	Remcos Payload

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:	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:	VIGIA_RemcosRAT_12bf67c7 Create hunting rule
Author:	VIG-IA - Cognitive Threat Intelligence System for Smart Territories and Tourism Sector
Description:	4ecda9dd-c048-413e-8ff4-2532f2e4d6eb - RemcosRAT family and corroborated behavioral indicators
Reference:	https://vigia.bisite.es/

Rule name:	VIGIA_RemcosRAT_3ca3d51f Create hunting rule
Author:	VIG-IA - Cognitive Threat Intelligence System for Smart Territories and Tourism Sector
Description:	b36f2418-9ab3-419b-8c15-e3b00eacabeb - RemcosRAT indicators and original NSIS-packaged sample
Reference:	https://vigia.bisite.es/

Rule name:	VIGIA_RemcosRAT_614e3ab4 Create hunting rule
Author:	VIG-IA - Cognitive Threat Intelligence System for Smart Territories and Tourism Sector
Description:	RemcosRAT configuration and corroborated diagnostic indicators
Reference:	https://vigia.bisite.es/

Rule name:	VIGIA_RemcosRAT_8ac92158 Create hunting rule
Author:	VIG-IA - Cognitive Threat Intelligence System for Smart Territories and Tourism Sector
Description:	RemcosRAT indicators with corroborated keylogging, credential-access, and scripted execution behavior
Reference:	https://vigia.bisite.es/

Rule name:	VIGIA_RemcosRAT_be11e16d Create hunting rule
Author:	VIG-IA - Cognitive Threat Intelligence System for Smart Territories and Tourism Sector
Description:	c0de03d4-e1e8-4c08-a5f7-4c330428829f - RemcosRAT activity messages and correlated behaviors
Reference:	https://vigia.bisite.es/

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_auto Create hunting rule
Author:	Felix Bilstein - yara-signator at cocacoding dot com
Description:	Detects win.remcos.

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.

Web download

RemcosRAT

js 3a71b1093e376997406e974deda12cfec19e4e77dfbd6a54c08be56d1a729d6c

(this sample)

URLhaus

https://urlhaus.abuse.ch/url/4062517/

Delivery method

Distributed via web download

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