MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4e703723a6acb20642af180b6a912a49653eae4bff2008f56b35e79a4e45a269. 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: 16

Intelligence 16 IOCs YARA 30 File information Comments

SHA256 hash:	4e703723a6acb20642af180b6a912a49653eae4bff2008f56b35e79a4e45a269
SHA3-384 hash:	8b3609f490a7f9aa26dccf295c2921196bb53314a7a2416b8e2d69127873c63c7922ff3092f2861ca32e960aad16b5f0
SHA1 hash:	c04565dbee882b7aa9b5f9fb1ff7cb6d211e4778
MD5 hash:	7910bff79818720386ddbf4fa2d00b3c
humanhash:	mountain-iowa-nineteen-twenty
File name:	bQK0.exe
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	239'104 bytes
First seen:	2023-10-19 11:07:22 UTC
Last seen:	2023-11-02 10:00:27 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	bc4f8e98d1041d53dd63bfb91ed10d0a (52 x RemcosRAT)
ssdeep	3072:YOSI2I7txG68nYrugMZJMfsciIpuKNtrUQlAK3qSjYPS+IAXb3Ixi5eFrgurIlNb:hvG68YrvM80ypnjAedo3qiGUY2ChzI
TLSH	T1BE3412641721E956F0E090BCCA44E9F25AA97C202DCB6B1E43E8FF07F917446A7CF166
TrID	54.9% (.EXE) UPX compressed Win32 Executable (27066/9/6) 13.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 10.2% (.EXE) Win16 NE executable (generic) (5038/12/1) 9.1% (.EXE) Win32 Executable (generic) (4505/5/1) 4.1% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):
dhash icon	c4d48eaa8ad4d4f8 (1'214 x RemcosRAT, 1 x Worm.Ramnit, 1 x Vjw0rm)
Reporter	pmelson
Tags:	exe remcos RemcosRAT

Intelligence

File Origin

# of uploads :

# of downloads :

414

Origin country :

Vendor Threat Intelligence

Malware family:

remcos

ID:

File name:

bQK0.exe

Verdict:

Malicious activity

Analysis date:

2023-10-19 11:10:58 UTC

Tags:

rat remcos remote keylogger

Link:

https://app.any.run/tasks/4461aa01-ecdd-405c-b1c7-00e9456902bf

Note:

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

Detection(s):

Win.Trojan.Remcos-9841897-0

Win.Trojan.Remcos-10002580-0

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

Сreating synchronization primitives

Setting a keyboard event handler

DNS request

Sending an HTTP GET request

Creating a file

Unauthorized injection to a recently created process

Restart of the analyzed sample

Reading critical registry keys

Creating a file in the %temp% directory

Query of malicious DNS domain

Sending a TCP request to an infection source

Stealing user critical data

Gathering data

Verdict:

Likely Malicious

Threat level:

5/10

Confidence:

100%

Tags:

greyware lolbin packed packed packed shell32 upx

Link:

https://www.filescan.io/uploads/65310e145995667255c0fd71/reports/7d7b25d0-e32f-4516-bdaa-1925a40b264b/overview

Verdict:

Malicious

Labled as:

Dacic.A9349469.A.Generic

Link:

https://www.hybrid-analysis.com/sample/4e703723a6acb20642af180b6a912a49653eae4bff2008f56b35e79a4e45a269

Malware family:

REMCOS

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/d9974d7e-46ea-4d5d-8473-1724a13bca98

Result

Threat name:

Remcos

Detection:

malicious

Classification:

phis.troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1328643

Signature

Antivirus / Scanner detection for submitted sample

Antivirus detection for URL or domain

Contains functionality to modify clipboard data

Deletes itself after installation

Installs a global keyboard hook

Machine Learning detection for sample

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

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

Yara detected Remcos RAT

Yara detected WebBrowserPassView password recovery tool

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/4e703723a6acb20642af180b6a912a49653eae4bff2008f56b35e79a4e45a269

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/4e703723a6acb20642af180b6a912a49653eae4bff2008f56b35e79a4e45a269/

Threat name:

Win32.Trojan.Remcos

Status:

Malicious

First seen:

2023-10-19 11:08:06 UTC

File Type:

PE (Exe)

Extracted files:

AV detection:

31 of 36 (86.11%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=jzydoi5gvszamqvpdafwvejkjfst5lsl74qar5llgxtzutsfujuq._file

Verdict:

malicious

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos botnet:tt copy collection rat spyware stealer upx

Link:

https://tria.ge/reports/231019-m8jmtsgh64/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Suspicious use of SetThreadContext

Accesses Microsoft Outlook accounts

Reads user/profile data of web browsers

UPX packed file

NirSoft MailPassView

NirSoft WebBrowserPassView

Nirsoft

Remcos

Malware Config

C2 Extraction:

salwanazeeze.duckdns.org:9595
salwanazeeze.ddns.net:9595

Unpacked files

SH256 hash:

68b9ac344f3e50cc6349e25316ffd85083df3565c45c6b41e9718f4b32105255

MD5 hash:

3d8ded8ff3b727c1c56ded4f6f766446

SHA1 hash:

7dca24374b0796a5119cff07ca9b8d8c9348ab96

Detections:

Remcos

win_remcos_w0

win_remcos_auto

Link:

https://www.unpac.me/results/cc2b2137-032f-4fb4-a5c4-ee0186622683/

SH256 hash:

4e703723a6acb20642af180b6a912a49653eae4bff2008f56b35e79a4e45a269

MD5 hash:

7910bff79818720386ddbf4fa2d00b3c

SHA1 hash:

c04565dbee882b7aa9b5f9fb1ff7cb6d211e4778

Link:

https://www.unpac.me/results/cc2b2137-032f-4fb4-a5c4-ee0186622683/

Malware family:

Remcos

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/4e703723a6ac/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:	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:	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:	TeslaCryptPackedMalware Create hunting rule

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

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:	Windows_Trojan_Remcos_b296e965 Create hunting rule
Author:	Elastic Security

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

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 4e703723a6acb20642af180b6a912a49653eae4bff2008f56b35e79a4e45a269

(this sample)

Link

https://www.virustotal.com/gui/file/4e703723a6acb20642af180b6a912a49653eae4bff2008f56b35e79a4e45a269/detection

Delivery method

Distributed via web download

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