MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 402fb31162f2581de23d4f3cec47dcfd9f4cb56b116050158254ba3d65dca873. 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: 14

Intelligence 14 IOCs YARA 34 File information Comments 1

SHA256 hash:	402fb31162f2581de23d4f3cec47dcfd9f4cb56b116050158254ba3d65dca873
SHA3-384 hash:	b4a44e08b692d950abdd30181648218a7bd60df74122a01af0f0394cef19839f76ef7a951f7f63303a4273963566f1ca
SHA1 hash:	6c94d7323a69f3dcd85d0f83894376f892def6ac
MD5 hash:	de5fb4cb77c429a6169efedcb8900930
humanhash:	blue-chicken-echo-diet
File name:	de5fb4cb77c429a6169efedcb8900930
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	258'560 bytes
First seen:	2024-05-10 05:36:30 UTC
Last seen:	2024-05-10 06:20:02 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'738 x AgentTesla, 19'597 x Formbook, 12'241 x SnakeKeylogger)
ssdeep	3072:Jgy2IKiETZ44Gr4ahNoGKrsSUNGuDKmJd1JLhVoiC8Ed4ADrr7HP8DeR5kJ03/zs:Cy29TDGrPNoGf0gfirXQYuL7
Threatray	757 similar samples on MalwareBazaar
TLSH	T11F445C026BECC613E6FF17B5907262204BB4E997F1CAEBDA59C064FA1C123546D113AF
TrID	63.0% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 11.2% (.SCR) Windows screen saver (13097/50/3) 9.0% (.EXE) Win64 Executable (generic) (10523/12/4) 5.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 3.8% (.EXE) Win32 Executable (generic) (4504/4/1)
Reporter	zbetcheckin
Tags:	32 exe RemcosRAT

Intelligence

File Origin

# of uploads :

# of downloads :

516

Origin country :

Vendor Threat Intelligence

Malware family:

remcos

ID:

File name:

402fb31162f2581de23d4f3cec47dcfd9f4cb56b116050158254ba3d65dca873.exe

Verdict:

Malicious activity

Analysis date:

2024-05-10 05:39:17 UTC

Tags:

rat remcos evasion keylogger stealer

Link:

https://app.any.run/tasks/377feeec-77a0-43cb-b5cb-cc4ea95d23fd

Note:

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

Detection(s):

SecuriteInfo.com.Win32.PWSX-gen.6227.4214.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Сreating synchronization primitives

DNS request

Connection attempt

Sending a custom TCP request

Launching a process

Searching for synchronization primitives

Launching the default Windows debugger (dwwin.exe)

Creating a file

Creating a window

Sending an HTTP GET request

Reading critical registry keys

Creating a file in the %temp% directory

Searching for the window

Stealing user critical data

Unauthorized injection to a system process

Verdict:

Suspicious

Threat level:

5/10

Confidence:

100%

Tags:

lolbin remote

Link:

https://www.filescan.io/uploads/663db27fa2d36d9500f449e1/reports/f05e5355-1d51-4afb-a2e3-3f1a1bc09561/overview

Verdict:

Malicious

Labled as:

Zusy.Generic

Link:

https://www.hybrid-analysis.com/sample/402fb31162f2581de23d4f3cec47dcfd9f4cb56b116050158254ba3d65dca873

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/176d3254-8287-4c01-bfe9-04d2db447474

Result

Threat name:

Remcos, PrivateLoader

Detection:

malicious

Classification:

rans.phis.troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1439319

Signature

.NET source code contains potential unpacker

Allocates memory in foreign processes

Antivirus detection for URL or domain

C2 URLs / IPs found in malware configuration

Contains functionality to bypass UAC (CMSTPLUA)

Contains functionality to inject code into remote processes

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

Delayed program exit found

Detected Remcos RAT

Found malware configuration

Injects a PE file into a foreign processes

Installs a global keyboard hook

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Maps a DLL or memory area into another process

Multi AV Scanner detection for domain / URL

Multi AV Scanner detection for submitted file

Sigma detected: Remcos

Snort IDS alert for network traffic

Tries to harvest and steal browser information (history, passwords, etc)

Tries to steal Instant Messenger accounts or passwords

Tries to steal Mail credentials (via file / registry access)

Tries to steal Mail credentials (via file registry)

Uses dynamic DNS services

Writes to foreign memory regions

Yara detected PrivateLoader

Yara detected Remcos RAT

Yara detected UAC Bypass using CMSTP

Yara detected WebBrowserPassView password recovery tool

Behaviour

Behavior Graph:

Download SVG

Score:

75%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/402fb31162f2581de23d4f3cec47dcfd9f4cb56b116050158254ba3d65dca873

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/402fb31162f2581de23d4f3cec47dcfd9f4cb56b116050158254ba3d65dca873/

Threat name:

ByteCode-MSIL.Backdoor.Remcos

Status:

Malicious

First seen:

2024-05-09 05:46:47 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

18 of 24 (75.00%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=iax3gelc6jmb3yr5j46oyr647wpuznllcfqfafmcks5d2zo4vbzq._file

Verdict:

malicious

Label(s):

remcos

RemcosRAT

4c92e0337b78ef707dd9a448bdb2c52b803af673a5628154ea7bc6492e182342

RemcosRAT

5e4ac8eb80f59f5d1b0952665962a8d357ae28d1b62ae6825520864b90b53142

RemcosRAT

7038b1250cc9380861d92e721d364cb844459f87ecc3fe002b59e97d35926dfa

RemcosRAT

786bdc138493ae90d9a94a75e3c8900684f6854219d7698a22bf81cc2c32ef7c

RemcosRAT

91e4bb8408db1e54d407d1859cbdde5c9df1a70c755474b5c7542ad661e30d00

RemcosRAT

d1836e6e0661938656d0d8883daa624f59b4a0885cd663be712bfa88a5ccea19

RemcosRAT

+ 747 additional samples on MalwareBazaar

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos botnet:remotehost collection rat spyware stealer

Link:

https://tria.ge/reports/240510-ga5vhsdh6v/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Suspicious use of SetThreadContext

Accesses Microsoft Outlook accounts

Reads user/profile data of web browsers

NirSoft MailPassView

NirSoft WebBrowserPassView

Nirsoft

Remcos

Malware Config

C2 Extraction:

trutru.duckdns.org:1199

Unpacked files

SH256 hash:

402fb31162f2581de23d4f3cec47dcfd9f4cb56b116050158254ba3d65dca873

MD5 hash:

de5fb4cb77c429a6169efedcb8900930

SHA1 hash:

6c94d7323a69f3dcd85d0f83894376f892def6ac

Link:

https://www.unpac.me/results/748a359a-e345-479e-aa74-338fc119dd00/

Malware family:

Remcos

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/402fb31162f2/report/overview.html

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

Threat name:

Remcos

Score:

0.90

Link:

https://yomi.yoroi.company/submissions/402fb31162f2581de23d4f3cec47dcfd9f4cb56b116050158254ba3d65dca873

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:	BLOWFISH_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for Blowfish constants

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:	iexplorer_remcos Create hunting rule
Author:	iam-py-test
Description:	Detect iexplorer being taken over by Remcos

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_References_Confidential_Data_Store Create hunting rule
Author:	ditekSHen
Description:	Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers

Rule name:	INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients Create hunting rule
Author:	ditekSHen
Description:	Detects executables referencing many email and collaboration clients. 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:	maldoc_find_kernel32_base_method_1 Create hunting rule
Author:	Didier Stevens (https://DidierStevens.com)

Rule name:	maldoc_getEIP_method_1 Create hunting rule
Author:	Didier Stevens (https://DidierStevens.com)

Rule name:	MD5_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for MD5 constants

Rule name:	meth_get_eip Create hunting rule
Author:	Willi Ballenthin

Rule name:	meth_stackstrings Create hunting rule
Author:	Willi Ballenthin

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

Rule name:	pe_imphash Create hunting rule

Rule name:	QbotStuff Create hunting rule
Author:	anonymous

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

Rule name:	REMCOS_RAT_variants Create hunting rule

Rule name:	RIPEMD160_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for RIPEMD-160 constants

Rule name:	SHA1_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for SHA1 constants

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

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_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

Rule name:	yara_template Create hunting rule

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

RemcosRAT

exe 402fb31162f2581de23d4f3cec47dcfd9f4cb56b116050158254ba3d65dca873

(this sample)

Delivery method

Distributed via web download

URLhaus

https://urlhaus.abuse.ch/url/2845047/

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

Comments

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zbet commented on 2024-05-10 05:36:31 UTC

url : hxxp://103.186.116.171/3505/htm.exe