MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ef41e4af8abb91a0c77f60005bd985ff554fe368593bb0b60d09a5fc9a54bd98. 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 25 File information Comments

SHA256 hash:	ef41e4af8abb91a0c77f60005bd985ff554fe368593bb0b60d09a5fc9a54bd98
SHA3-384 hash:	388dfbca33415a124a534faa7dadb0f2238e19d26e6223fd1df85d558200f75b0f170f586efeaf237b808ac9ee64e0ea
SHA1 hash:	0a8c1c0632b383564e056ac6ce279de9381bfe26
MD5 hash:	9e848a4af00c33c6b7f6dbe7dc06ed35
humanhash:	uncle-cardinal-william-queen
File name:	file.exe
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	636'180 bytes
First seen:	2026-10-08 18:59:22 UTC
Last seen:	Never
File type:	exe
MIME type:	application/vnd.microsoft.portable-executable
ssdeep	12288:YhsbQr1LJV01LpxxfLV6TmSo95PhBwC0c:YeErFJGnDV6qSQ5r0
TLSH	T1BFD4AE55A2910CFDC063C2B0C3C34539DDB2BC622675567F12D72A1BAE13792AF2DB29
TrID	37.0% (.EXE) Win64 Executable (generic) (6522/11/2) 28.6% (.EXE) Win16 NE executable (generic) (5038/12/1) 11.5% (.EXE) OS/2 Executable (generic) (2029/13) 11.3% (.EXE) Generic Win/DOS Executable (2002/3) 11.3% (.EXE) DOS Executable (generic) (2000/1)
Magika	pebin
Reporter	abuse_ch
Tags:	exe RAT RemcosRAT

Intelligence

File Origin

# of uploads :

# of downloads :

194

Origin country :

Vendor Threat Intelligence

No detections

Detection:

n/a

Link:

https://www.capesandbox.com/analysis/91155/

Detection(s):

Win.Trojan.Remcos-10002580-0

Win.Trojan.Remcos-9841897-0

YARA.EMBEERESEARCH_Win_Remcos_Rat_Unpacked.UNOFFICIAL

Result

Verdict:

Clean

Maliciousness:

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

crypto evasive exploit explorer lolbin microsoft_visual_cc overlay packed packed rat rat remcos remcos rundll32 windows

Link:

https://www.filescan.io/uploads/6ac7e84de63668293bac5b6b/reports/a1676040-e676-434b-9a40-7814acc7ecef/overview

Verdict:

Malicious

Labled as:

Trojan/RemcosRAT

Link:

https://www.hybrid-analysis.com/sample/ef41e4af8abb91a0c77f60005bd985ff554fe368593bb0b60d09a5fc9a54bd98

Verdict:

Clean

File Type:

exe x64

First seen:

2026-10-09T17:51:00Z UTC

Last seen:

2026-10-10T11:33:00Z UTC

Hits:

~10

Link:

https://opentip.kaspersky.com/ef41e4af8abb91a0c77f60005bd985ff554fe368593bb0b60d09a5fc9a54bd98/results?tab=lookup

Verdict:

Suspicious

Link:

https://analyze.intezer.com/analyses/10dbd16d-76c1-411d-8ea4-b2320d1abfea

Result

Threat name:

Remcos

Detection:

malicious

Classification:

troj.expl

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1984437

Signature

Antivirus / Scanner detection for submitted sample

Antivirus detection for URL or domain

C2 URLs / IPs found in malware configuration

Found malware configuration

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Yara detected Remcos RAT

Yara detected UAC Bypass using CMSTP

Behaviour

Behavior Graph:

Download SVG

Score:

93%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/ef41e4af8abb91a0c77f60005bd985ff554fe368593bb0b60d09a5fc9a54bd98

Verdict:

inconclusive

YARA:

5 match(es)

Tags:

Executable PE (Portable Executable) PE Memory-Mapped (Dump)

Link:

https://app.malva.re/file/9e848a4af00c33c6b7f6dbe7dc06ed35

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/ef41e4af8abb91a0c77f60005bd985ff554fe368593bb0b60d09a5fc9a54bd98/

Threat name:

Win64.Backdoor.Remcos

Status:

Malicious

First seen:

2026-10-07 22:28:24 UTC

File Type:

PE+ (Exe)

AV detection:

26 of 38 (68.42%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=55a6jl4kxoi2br37maafxwmf75ku7y3ile53bnqnbgs7zgsuxwma._file

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos rat

Link:

https://tria.ge/reports/261008-xnvvgat17q/

Unpacked files

SH256 hash:

ef41e4af8abb91a0c77f60005bd985ff554fe368593bb0b60d09a5fc9a54bd98

MD5 hash:

9e848a4af00c33c6b7f6dbe7dc06ed35

SHA1 hash:

0a8c1c0632b383564e056ac6ce279de9381bfe26

Detections:

Remcos

win_remcos_w0

INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM

malware_windows_remcos_rat

win_remcos_rat_unpacked

Link:

https://www.unpac.me/results/d3b8f6f9-2a13-4835-b8d6-2b94e183c22d/

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/ef41e4af8abb91a0c77f60005bd985ff554fe368593bb0b60d09a5fc9a54bd98

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:	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:	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_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_All_Windows_PE_Malware Create hunting rule
Author:	DiegoAnalytics
Description:	Detects Windows PE malware of all types, avoids non-executables like .html

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:	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.

Cape

https://www.capesandbox.com/analysis/91155/

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