MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b856704dcb7b2f172d96f5a804628bc5ce615c7750a952b88eff541f16d5afe1. 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: 19

Intelligence 19 IOCs YARA 29 File information Comments

SHA256 hash:	b856704dcb7b2f172d96f5a804628bc5ce615c7750a952b88eff541f16d5afe1
SHA3-384 hash:	909441e1b614b5feec579bd6fa533bd3f55b67355bde3cf812ad5f60d912b367a1ba7711838553f0714fb299cffa11f3
SHA1 hash:	3ac43b83c9563d31be2a71e945eb9c1fdf362d74
MD5 hash:	f71681e3d2ab2b351dcafd96d1ebc9b3
humanhash:	hawaii-solar-nebraska-quiet
File name:	b856704dcb7b2f172d96f5a804628bc5ce615c7750a952b88eff541f16d5afe1
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	1'017'856 bytes
First seen:	2026-09-10 10:55:30 UTC
Last seen:	2026-10-19 07:06:01 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (49'364 x AgentTesla, 20'869 x Formbook, 12'418 x SnakeKeylogger)
ssdeep	24576:cJZ8cHObaV05PWu6lCVIrLhLL8WlI5XcGgQ:5cp8eu6wqrR3lI5XcG
TLSH	T13B2512156B8BDC13C4761BB928D2D23013350DCAA463D06B5FDA3EDB3A36BA59AC4743
TrID	72.4% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 6.5% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 6.4% (.EXE) Win64 Executable (generic) (6522/11/2) 4.4% (.EXE) Win32 Executable (generic) (4504/4/1) 2.0% (.EXE) Win16/32 Executable Delphi generic (2072/23)
Magika	pebin
dhash icon	6f6c486c6d000000 (2 x RemcosRAT)
Reporter	adrian__luca
Tags:	exe RemcosRAT

Intelligence

File Origin

# of uploads :

# of downloads :

110

Origin country :

Vendor Threat Intelligence

Malware configuration found for:

NETReactor RoboSki

Details

Link:

https://research.acce.ciphertechsolutions.com/results/e6112efa-62fc-4b6e-ab82-f656c370c0eb/

Malware family:

remcos

ID:

File name:

exe

Verdict:

Malicious activity

Analysis date:

2026-09-10 12:31:26 UTC

Tags:

netreactor auto-reg remcos rat upx

Link:

https://app.any.run/tasks/a7dd2dcc-2b79-4664-bf99-a5b0df996bba

Note:

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

Detection:

Remcos

Link:

https://www.capesandbox.com/analysis/84859/

Verdict:

Malicious

Score:

94.1%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6ac95ed47dee0dd63c37ffa9

Tags:

virus spawn

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Creating a file in the %AppData% directory

Enabling the 'hidden' option for recently created files

Adding an access-denied ACE

Unauthorized injection to a recently created process

Restart of the analyzed sample

Creating a file

Сreating synchronization primitives

Deleting a recently created file

Reading critical registry keys

Blocking the Windows Defender launch

Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch

Connection attempt to an infection source

Sending a TCP request to an infection source

Stealing user critical data

Verdict:

Malicious

Labled as:

Trojan.Generic

Link:

https://www.hybrid-analysis.com/sample/b856704dcb7b2f172d96f5a804628bc5ce615c7750a952b88eff541f16d5afe1

Verdict:

Malicious

File Type:

exe x32

First seen:

2026-08-21T11:21:00Z UTC

Last seen:

2026-09-09T10:34:00Z UTC

Hits:

~100

Link:

https://opentip.kaspersky.com/b856704dcb7b2f172d96f5a804628bc5ce615c7750a952b88eff541f16d5afe1/results?tab=lookup

Malware family:

REMCOS

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/72460403-3cda-47f8-bf75-021352fa1c84

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/b856704dcb7b2f172d96f5a804628bc5ce615c7750a952b88eff541f16d5afe1

Verdict:

Malware

YARA:

12 match(es)

Tags:

.Net .Net Obfuscator .Net Reactor Executable Managed .NET PE (Portable Executable) PE File Layout SOS: 0.65 Win 32 Exe x86

Link:

https://app.malva.re/file/f71681e3d2ab2b351dcafd96d1ebc9b3

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/b856704dcb7b2f172d96f5a804628bc5ce615c7750a952b88eff541f16d5afe1/

Threat name:

Win32.Backdoor.Remcos

Status:

Malicious

First seen:

2026-08-21 14:59:45 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

27 of 36 (75.00%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=xblhatolpmxrolmw6wuaiyulyxhgcxdxkcuvfoeo75kb6fwvv7qq._file

Verdict:

malicious

Label(s):

Remcos

Link:

https://reports.threatray.com/89b0394c-7e00-490d-af4d-e1049a9611cc

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos botnet:don32upx collection discovery evasion execution persistence rat spyware stealer trojan upx

Link:

https://tria.ge/reports/260910-m1t4lagf29/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

outlook_office_path

System Location Discovery: System Language Discovery

Suspicious use of SetThreadContext

UPX packed file

Accesses Microsoft Outlook profiles

Adds Run key to start application

Checks installed software on the system

Executes dropped EXE

Reads user/profile data of web browsers

Command and Scripting Interpreter: PowerShell

Family: Remcos

Modifies Windows Defender DisableAntiSpyware settings

Malware Config

C2 Extraction:

217.60.195.33:17541

Unpacked files

SH256 hash:

b856704dcb7b2f172d96f5a804628bc5ce615c7750a952b88eff541f16d5afe1

MD5 hash:

f71681e3d2ab2b351dcafd96d1ebc9b3

SHA1 hash:

3ac43b83c9563d31be2a71e945eb9c1fdf362d74

Link:

https://www.unpac.me/results/167a5b34-f92e-423b-b727-e197ba1335c9/

SH256 hash:

8d0d5cca253ae27db341dc761edec9857969bdf7eb393222c71340028a388bc3

MD5 hash:

2af60e550388575429c7bc46368e9bd2

SHA1 hash:

90ece2b9a47b0be4aea9817d6ff24542fda7c9de

Link:

https://www.unpac.me/results/167a5b34-f92e-423b-b727-e197ba1335c9/

SH256 hash:

0e0236131d651a5730a6b65d001218d1c60895f52d4dbdb5aa703122b8d49879

MD5 hash:

a1fe7df081cde2e7767e42d651648682

SHA1 hash:

ab4621d1b0ded5118d1db9ab8d6edf4c29f03530

Detections:

SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24

Link:

https://www.unpac.me/results/167a5b34-f92e-423b-b727-e197ba1335c9/

SH256 hash:

a3605f0c79c8823db57889941605fa8c4b55f2471eee7776ca5bf2207a130fb7

MD5 hash:

de80b3909e995867fdfbfbcc4eca874e

SHA1 hash:

0b4cdbe6e1dbe76f7bc8c37dcdf6db6f02fbc7fa

Detections:

Remcos

win_remcos_auto

win_remcos_w0

INDICATOR_SUSPICIOUS_Binary_References_Browsers

INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM

win_remcos_rat_unpacked

Link:

https://www.unpac.me/results/167a5b34-f92e-423b-b727-e197ba1335c9/

Parent samples :

10e00b5609e2579472202fa80d3f7cb27d3d5f6e975c5497107dde55237b4ae0
60f99991b72a6f5271b814981068b5dbac7fe7ea114ef5f3295657a460ad42cb
b856704dcb7b2f172d96f5a804628bc5ce615c7750a952b88eff541f16d5afe1

Malware family:

Remcos

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/b856704dcb7b/report/overview.html

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/b856704dcb7b2f172d96f5a804628bc5ce615c7750a952b88eff541f16d5afe1

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:	NET 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_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:	UPX Create hunting rule
Author:	kevoreilly
Description:	UPX Unpacker: dump on OEP (original entry point)

Rule name:	UPXV200V290MarkusOberhumerLaszloMolnarJohnReiser Create hunting rule
Author:	malware-lu

Rule name:	UPXv20MarkusLaszloReiser Create hunting rule
Author:	malware-lu

Rule name:	upx_3 Create hunting rule
Author:	Kevin Falcoz
Description:	UPX 3.X

Rule name:	upx_largefile Create hunting rule
Author:	k3nr9

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_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.

Cape

https://www.capesandbox.com/analysis/84859/

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