MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 87fcbd1f67359062e18c02f3a27bc8e192cf771819fd929cc8a96d884cf35f5f. 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: 12

Intelligence 12 IOCs YARA 22 File information Comments

SHA256 hash:	87fcbd1f67359062e18c02f3a27bc8e192cf771819fd929cc8a96d884cf35f5f
SHA3-384 hash:	682ee929fd8cf9103de0e399a64c8bdf580c2ed45d4942ba4aef58e2adddb03407118127cc75d67110be83427ea47ca8
SHA1 hash:	983875a189258db83cac369a026ad14f86dac370
MD5 hash:	e1fa5b37c873712158ed372b353c98b1
humanhash:	lima-juliet-table-eight
File name:	task.js
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	40'100 bytes
First seen:	2025-08-26 05:40:19 UTC
Last seen:	Never
File type:	js
MIME type:	text/plain
ssdeep	192:fFKC8Zt8C8bLy/9T3pZWO1tyVRSWVfNL+RoS2WOWVXgfd7oZOvXZsC81f8RaIV7y:9P86/V0jjTEHIRwulTYOc7NkNX
Threatray	1'396 similar samples on MalwareBazaar
TLSH	T16803B6C10B6EABD419EAAF0FBD29F5F35CA4139B387D456295651EDCA900BCC08C24DB
Magika	javascript
Reporter	abuse_ch
Tags:	js RAT RemcosRAT

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

Vendor Threat Intelligence

Verdict:

Malicious

Score:

94.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=68ad48ddeb163e0ec182b79b

Tags:

obfuscate xtreme spawn

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-vm powershell

Link:

https://www.filescan.io/uploads/68ad49887137d684583d1709/reports/a431eed8-0bd5-499e-804c-c0670c006e47/overview

Verdict:

Suspicious

Labled as:

HEUR_Trojan_Script_Generic

Link:

https://www.hybrid-analysis.com/sample/87fcbd1f67359062e18c02f3a27bc8e192cf771819fd929cc8a96d884cf35f5f

Verdict:

Malicious

File Type:

First seen:

2025-08-26T00:30:00Z UTC

Last seen:

2025-08-26T00:30:00Z UTC

Hits:

~10

Link:

https://opentip.kaspersky.com/87fcbd1f67359062e18c02f3a27bc8e192cf771819fd929cc8a96d884cf35f5f/results?tab=lookup

Result

Threat name:

Remcos, PureLog Stealer

Detection:

malicious

Classification:

rans.troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1765106

Signature

.NET source code contains potential unpacker

C2 URLs / IPs found in malware configuration

Contains functionality to bypass UAC (CMSTPLUA)

Contains functionality to register a low level keyboard hook

Contains functionality to steal Chrome passwords or cookies

Contains functionality to steal Firefox passwords or cookies

Contains functionalty to change the wallpaper

Creates processes via WMI

Detected Remcos RAT

Found malware configuration

Injects a PE file into a foreign processes

Installs a global keyboard hook

JavaScript source code contains functionality to generate code involving a shell, file or stream

Joe Sandbox ML detected suspicious sample

Malicious sample detected (through community Yara rule)

Sigma detected: Base64 Encoded PowerShell Command Detected

Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet

Sigma detected: Remcos

Sigma detected: Silenttrinity Stager Msbuild Activity

Sigma detected: WScript or CScript Dropper

Suricata IDS alerts for network traffic

Suspicious execution chain found

Suspicious powershell command line found

Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)

Uses dynamic DNS services

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 AntiVM3

Yara detected Costura Assembly Loader

Yara detected Powershell download and execute

Yara detected PureLog Stealer

Yara detected Remcos RAT

Yara detected UAC Bypass using CMSTP

Behaviour

Behavior Graph:

Download SVG

Score:

91%

Verdict:

Malware

File Type:

SCRIPT

Link:

https://malprob.io/report/87fcbd1f67359062e18c02f3a27bc8e192cf771819fd929cc8a96d884cf35f5f

Gathering data

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/87fcbd1f67359062e18c02f3a27bc8e192cf771819fd929cc8a96d884cf35f5f/

Threat name:

Script-JS.Backdoor.Remcos

Status:

Malicious

First seen:

2025-08-26 01:00:07 UTC

File Type:

Binary

AV detection:

11 of 38 (28.95%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=q76l2h3hgwigfymmalz2e66i4gjm65yydh6zfhgivfwyqthtl5pq._file

Verdict:

malicious

Label(s):

remcos

RemcosRAT

1bac3ca72f25881a8e0a8ba5a9708a69f100c08c07f050a9922751183c481918

RemcosRAT

3021e7589fef17cce2d2dac8424ecc68a61d84cf25762c4caad209aa0a51e68a

RemcosRAT

7300bb9b7e8f35cc510011449846f4afb36fda088d661f4cd755ce470638c488

RemcosRAT

9f146cf7dbef2543742cf970ce79bf792211b2ffec0426600bab4e556874125b

RemcosRAT

a3a0b78d605313910e3ec9ba9c0c90bc454977f08354185973c0475afb88c842

RemcosRAT

de2924e0b41f3ead65900156974f3048ad41886489c95e01064b5b0885781ecd

RemcosRAT

ff6ba4489c2fe94e5ed49e2bbb411abbb6677f73b56df746ffb36c6c0ea6b81f

RemcosRAT

+ 1'386 additional samples on MalwareBazaar

Result

Malware family:

n/a

Score:

10/10

Tags:

defense_evasion discovery execution

Link:

https://tria.ge/reports/250826-ge1rcsvxgz/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Command and Scripting Interpreter: JavaScript

System Location Discovery: System Language Discovery

Suspicious use of SetThreadContext

Badlisted process makes network request

Command and Scripting Interpreter: PowerShell

Modifies trusted root certificate store through registry

Process spawned unexpected child process

Malware Config

Dropper Extraction:

http://gestionycobranzas.com/1/ws.png

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/87fcbd1f67359062e18c02f3a27bc8e192cf771819fd929cc8a96d884cf35f5f

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_AllMal_Detector Create hunting rule
Author:	DiegoAnalytics
Description:	CrossPlatform All Malwares Detector: Detect PE, ELF, Mach-O, scripts, archives; overlay, obfuscation, encryption, spoofing, hiding, high entropy, network communication

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:	FreddyBearDropper Create hunting rule
Author:	Dwarozh Hoshiar
Description:	Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.

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

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:	NET Create hunting rule
Author:	malware-lu

Rule name:	pe_detect_tls_callbacks Create hunting rule

Rule name:	Remcos Create hunting rule
Author:	kevoreilly
Description:	Remcos Payload

Rule name:	remcos_ Create hunting rule
Author:	Michelle Khalil
Description:	This rule detects unpacked remcos malware samples.

Rule name:	REMCOS_RAT_variants Create hunting rule

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

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:	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_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 87fcbd1f67359062e18c02f3a27bc8e192cf771819fd929cc8a96d884cf35f5f

(this sample)

URLhaus

https://urlhaus.abuse.ch/url/3609409/

Delivery method

Distributed via web download

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