MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3543cabb8f07c2ca336999986b1889540db647c250dcf26db025f5d1139ec5e4. 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 32 File information Comments

SHA256 hash:	3543cabb8f07c2ca336999986b1889540db647c250dcf26db025f5d1139ec5e4
SHA3-384 hash:	2e3c420c4dffee27a8af05d33bcfa0ff711b789643a5aa55c72b71c5669e1d2ebcd4853205f07ecdf97a515e81659379
SHA1 hash:	9fcfcdd49bbf36165e8ad9382ba48648717ca435
MD5 hash:	18a48ac8f1801cd4bf74c5d6004bc67b
humanhash:	may-william-crazy-butter
File name:	Purchase Order.exe
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	1'092'608 bytes
First seen:	2025-09-17 12:04:20 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep	24576:oXavAD3vheji1GGqsqBGy0GB5y6ymqZd:PWvhF1rqofGn8m
Threatray	2'827 similar samples on MalwareBazaar
TLSH	T19535E1AC3251B99FC8538E724964DE70AA206C7A9707C20395F31CAFB91D697DE142F3
TrID	69.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 10.0% (.EXE) Win64 Executable (generic) (10522/11/4) 6.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.2% (.EXE) Win32 Executable (generic) (4504/4/1) 1.9% (.EXE) Win16/32 Executable Delphi generic (2072/23)
Magika	pebin
Reporter	abuse_ch
Tags:	exe RAT RemcosRAT

Intelligence

File Origin

# of uploads :

# of downloads :

126

Origin country :

Vendor Threat Intelligence

Malware family:

remcos

ID:

File name:

Purchase Order.exe

Verdict:

Malicious activity

Analysis date:

2025-09-17 12:07:46 UTC

Tags:

remcos rat remote

Link:

https://app.any.run/tasks/7bf3c55a-61b2-43d7-9746-7fada738cb46

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/27905/

Detection(s):

Win.Dropper.Formbook-9994358-0

Verdict:

Clean

Score:

89.3%

Link:

https://cyber-fortress.com/docs/result/index.php?id=68caa3e52432032546472266

Tags:

n/a

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

Connection attempt

Sending a custom TCP request

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

masquerade obfuscated obfuscated obfuscated packed packed packer_detected vbnet

Link:

https://www.filescan.io/uploads/68caa3db73287948292d420b/reports/e07650fc-d6a3-4044-976b-5af9656ee888/overview

Verdict:

Malicious

Labled as:

Win/malicious_confidence_100%

Link:

https://www.hybrid-analysis.com/sample/3543cabb8f07c2ca336999986b1889540db647c250dcf26db025f5d1139ec5e4

Verdict:

Malicious

File Type:

exe x32

First seen:

2025-09-16T16:27:00Z UTC

Last seen:

2025-09-16T16:27:00Z UTC

Hits:

~100

Link:

https://opentip.kaspersky.com/3543cabb8f07c2ca336999986b1889540db647c250dcf26db025f5d1139ec5e4/results?tab=lookup

Verdict:

Suspicious

Link:

https://analyze.intezer.com/analyses/ecd90de7-2eaa-4000-b6d6-5cd9292d3289

Result

Threat name:

Remcos

Detection:

malicious

Classification:

rans.troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1779197

Signature

.NET source code contains method to dynamically call methods (often used by packers)

.NET source code contains potential unpacker

Antivirus / Scanner detection for submitted sample

C2 URLs / IPs found in malware configuration

Contains functionality to bypass UAC (CMSTPLUA)

Contains functionality to determine the online IP of the system

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

Detected Remcos RAT

Found malware configuration

Icon mismatch, binary includes an icon from a different legit application in order to fool users

Initial sample is a PE file and has a suspicious name

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/3543cabb8f07c2ca336999986b1889540db647c250dcf26db025f5d1139ec5e4

Verdict:

inconclusive

YARA:

12 match(es)

Tags:

.Net Executable Managed .NET PE (Portable Executable) PE File Layout SOS: 0.80 Win 32 Exe x86

Link:

https://app.malva.re/file/18a48ac8f1801cd4bf74c5d6004bc67b

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/3543cabb8f07c2ca336999986b1889540db647c250dcf26db025f5d1139ec5e4/

Threat name:

ByteCode-MSIL.Backdoor.FormBook

Status:

Malicious

First seen:

2025-09-17 12:05:57 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

21 of 24 (87.50%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=gvb4vo4pa7bmum3jtgmgwgejkqg3mr6ckdope3nqex25ce46yxsa._file

Verdict:

malicious

Label(s):

unc_loader_037

remcos

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos discovery rat

Link:

https://tria.ge/reports/250917-n8yx7axjv9/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

System Location Discovery: System Language Discovery

Suspicious use of SetThreadContext

Remcos

Remcos family

Malware Config

C2 Extraction:

160.250.133.60:3310

Verdict:

Malicious

Tags:

Win.Dropper.Formbook-9994358-0

YARA:

n/a

Link:

https://app.threat.zone/submission/0abe4213-60ef-4e55-9997-00e60858e0c9

Unpacked files

SH256 hash:

3543cabb8f07c2ca336999986b1889540db647c250dcf26db025f5d1139ec5e4

MD5 hash:

18a48ac8f1801cd4bf74c5d6004bc67b

SHA1 hash:

9fcfcdd49bbf36165e8ad9382ba48648717ca435

Link:

https://www.unpac.me/results/6fbdccf2-10e6-499e-b63c-16e2bf24b004/

SH256 hash:

1041b538ccbc7d66e59247ef7551cde9b6c282843541585e9190a8e2e3943b12

MD5 hash:

e870d1e8f3791ccc141f85f40fd2972b

SHA1 hash:

150919ee289cffa6feb40ab8261f620dd7e26aac

Link:

https://www.unpac.me/results/6fbdccf2-10e6-499e-b63c-16e2bf24b004/

SH256 hash:

7dc0d33b29fb95c7b537d514ad1e1a36e2538c41c949604539d652bd854b60e3

MD5 hash:

85445632d0e7e6044daeebd83b763e99

SHA1 hash:

77dff8bfba1cf8014d253f5abd5398e3dfeaf190

Detections:

SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24

SUSP_OBF_NET_Reactor_Indicators_Jan24

Link:

https://www.unpac.me/results/6fbdccf2-10e6-499e-b63c-16e2bf24b004/

SH256 hash:

1271dad1a874fda606073b99a8d058ba466a400dfa66812369ca06575ac47c8d

MD5 hash:

d9de0e991abc24c8f583a921dabe0f18

SHA1 hash:

d1f00d7865d8a5a997363d460fee6c106f2de37e

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/6fbdccf2-10e6-499e-b63c-16e2bf24b004/

Malware family:

Remcos

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/3543cabb8f07/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/3543cabb8f07c2ca336999986b1889540db647c250dcf26db025f5d1139ec5e4

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:	Check_OutputDebugStringA_iat Create hunting rule

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:	DebuggerCheck__QueryInfo 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_EXE_Packed_MPress Create hunting rule
Author:	ditekSHen
Description:	Detects executables built or packed with MPress PE compressor

Rule name:	INDICATOR_SUSPICIOUS_EXE_SQLQuery_ConfidentialDataStore Create hunting rule
Author:	ditekSHen
Description:	Detects executables containing SQL queries to confidential data stores. Observed in infostealers

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:	RANSOMWARE Create hunting rule
Author:	ToroGuitar

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:	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:	TeslaCryptPackedMalware Create hunting rule

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:	WIN_WebSocket_Base64_C2_20250726 Create hunting rule
Author:	dogsafetyforeverone
Description:	Detects configuration strings used by malware to specify WebSocket command-and-control endpoints inside Base64-encoded data. It looks for prefixes such as '#ws://' or '#wss://' that were found in QuasarRAT configuration data.

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/27905/

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