MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 661c2b90b64e45ecf8e54c8a796ddb172bc7b64d614efd099a323647efbfe793. 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: 18

Intelligence 18 IOCs YARA 20 File information Comments

SHA256 hash:	661c2b90b64e45ecf8e54c8a796ddb172bc7b64d614efd099a323647efbfe793
SHA3-384 hash:	a4e09c92ac459b1549880722202b27b9f57d332b54e76c9a69e46861d409a1202c4b2f272110ea13cb6f5d39e2c0002f
SHA1 hash:	ce48f68e72ac4703b42274cf4d79eee8df1602fa
MD5 hash:	8b28cca83d900ffdc5add10364e39cad
humanhash:	mockingbird-alaska-social-yellow
File name:	SecuriteInfo.com.Win32.MalwareX-gen.13346.31691
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	956'928 bytes
First seen:	2025-05-05 06:20:29 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep	24576:zs8teE5qrtyK+nFsPfb/xFt/RriCWxnL:zqpyK+KPTntJMtL
TLSH	T14F151269AF98D902DC930B790A62F3792764DE8EE022D275CFEC6CE77825F145708346
TrID	71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 10.2% (.EXE) Win64 Executable (generic) (10522/11/4) 6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.3% (.EXE) Win32 Executable (generic) (4504/4/1) 2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Magika	pebin
dhash icon	70e8e09e9ad8d0e1 (9 x Formbook, 3 x RemcosRAT, 3 x SnakeKeylogger)
Reporter	SecuriteInfoCom
Tags:	exe RemcosRAT

Intelligence

File Origin

# of uploads :

# of downloads :

536

Origin country :

Vendor Threat Intelligence

Malware family:

remcos

ID:

File name:

SecuriteInfo.com.Win32.MalwareX-gen.13346.31691

Verdict:

Malicious activity

Analysis date:

2025-05-05 06:24:27 UTC

Tags:

remcos rat remote

Link:

https://app.any.run/tasks/2c5fe506-6087-438d-b1f7-676195baaea7

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

Detection(s):

SecuriteInfo.com.Win32.MalwareX-gen.13346.31691.UNOFFICIAL

Verdict:

Malicious

Score:

81.4%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6818595e8474cc94a4e41473

Tags:

ransomware dropper micro

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Unauthorized injection to a recently created process

Restart of the analyzed sample

Creating a file

Сreating synchronization primitives

Setting a keyboard event handler

DNS request

Connection attempt

Sending a custom TCP request

Sending an HTTP GET request

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

obfuscated packed packed packer_detected remcos

Link:

https://www.filescan.io/uploads/681858e0d95f3e34e9606381/reports/1abc43a1-4301-4c37-a417-c0d7bde3f047/overview

Verdict:

Malicious

Labled as:

Win/malicious_confidence_90%

Link:

https://www.hybrid-analysis.com/sample/661c2b90b64e45ecf8e54c8a796ddb172bc7b64d614efd099a323647efbfe793

Malware family:

REMCOS

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/d6d3fbbc-f83c-4348-b004-cc284351aca6

Result

Threat name:

Remcos

Detection:

malicious

Classification:

rans.troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1681091

Signature

.NET source code contains potential unpacker

Antivirus detection for URL or domain

C2 URLs / IPs found in malware configuration

Contains functionality to register a low level keyboard hook

Contains functionalty to change the wallpaper

Found malware configuration

Injects a PE file into a foreign processes

Installs a global keyboard hook

Joe Sandbox ML detected suspicious sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Sigma detected: Remcos

Suricata IDS alerts for network traffic

Yara detected AntiVM3

Yara detected Remcos RAT

Yara detected UAC Bypass using CMSTP

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/661c2b90b64e45ecf8e54c8a796ddb172bc7b64d614efd099a323647efbfe793

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/661c2b90b64e45ecf8e54c8a796ddb172bc7b64d614efd099a323647efbfe793/

Threat name:

ByteCode-MSIL.Spyware.AsyncRAT

Status:

Malicious

First seen:

2025-05-05 05:33:12 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

20 of 24 (83.33%)

Threat level:

2/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=myocxefwjzc6z6hfjsfhs3o3c4v4pnsnmfhp2cm2gi3ep35746jq._file

Verdict:

malicious

Label(s):

remcos

unc_loader_037

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos botnet:remotehost discovery rat

Link:

https://tria.ge/reports/250505-g4fsgstlt4/

Behaviour

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

System Location Discovery: System Language Discovery

Suspicious use of SetThreadContext

Remcos

Remcos family

Malware Config

C2 Extraction:

obinwannedimna.ydns.eu:2668

Verdict:

Suspicious

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/13150d3c-6bcb-4602-83dc-b9e6da3c9ab6

Unpacked files

SH256 hash:

661c2b90b64e45ecf8e54c8a796ddb172bc7b64d614efd099a323647efbfe793

MD5 hash:

8b28cca83d900ffdc5add10364e39cad

SHA1 hash:

ce48f68e72ac4703b42274cf4d79eee8df1602fa

Link:

https://www.unpac.me/results/eb47d465-595e-4d64-b70a-9526d3604791/

SH256 hash:

4de9bf45ddd86d0e8a9d918a9788e1ac1e876096cafdc8528a79917e9b7d8d12

MD5 hash:

c93f19a59c6c80c911773431853528aa

SHA1 hash:

2c870fee3dc1c6b2113f63ccf3c76853a5a44441

Detections:

win_remcos_w0

win_remcos_auto

Remcos

malware_windows_remcos_rat

win_remcos_rat_unpacked

INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM

Link:

https://www.unpac.me/results/eb47d465-595e-4d64-b70a-9526d3604791/

SH256 hash:

1f1f345bf543222e80868b1b1cd44b1865c918614f1abe76e089b619081660da

MD5 hash:

c493151e05957eaf46f5f51b366e7d07

SHA1 hash:

343d8c8e2f5f59863a4c80b3cea768ea7b433ae2

Detections:

SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24

SUSP_OBF_NET_Reactor_Indicators_Jan24

Link:

https://www.unpac.me/results/eb47d465-595e-4d64-b70a-9526d3604791/

SH256 hash:

667083d1cb2823e28c43e3086ffd3ffe60f4c57b7b79daa313fd838b09942498

MD5 hash:

6da2a800ef156900f359b3fddc96c61d

SHA1 hash:

3ca283137915cfd65d053c02d6e71bed099dfc74

Link:

https://www.unpac.me/results/eb47d465-595e-4d64-b70a-9526d3604791/

Malware family:

Remcos

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/661c2b90b64e/report/overview.html

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

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

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_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:	NETexecutableMicrosoft Create hunting rule
Author:	malware-lu

Rule name:	pe_detect_tls_callbacks Create hunting rule

Rule name:	pe_imphash Create hunting rule

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:	Skystars_Malware_Imphash Create hunting rule
Author:	Skystars LightDefender
Description:	imphash

Rule name:	Sus_Obf_Enc_Spoof_Hide_PE Create hunting rule
Author:	XiAnzheng
Description:	Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(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.

No further information available

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings

ID	Title	Severity
CHECK_AUTHENTICODE	Missing Authenticode	high
CHECK_DLL_CHARACTERISTICS	Missing dll Security Characteristics (HIGH_ENTROPY_VA)	high

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