MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fa55210612a721c8b74a140e3e7423074c40c27c1ce468e0202f6a4d2abdb467. 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 27 File information Comments

SHA256 hash:	fa55210612a721c8b74a140e3e7423074c40c27c1ce468e0202f6a4d2abdb467
SHA3-384 hash:	1243b822b02c66a7d406121f65325e6c1bd833776e6ab7624ee295c845623280d9fe514e93c17b8f1ffbf41a80e8b09f
SHA1 hash:	53a35588158374c2b785902beba7b1e15015d8af
MD5 hash:	3ff1f7ad040a5a78cdc9489a4905192a
humanhash:	steak-michigan-seven-juliet
File name:	DND3243676432.exe
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	882'095 bytes
First seen:	2024-06-04 12:54:21 UTC
Last seen:	2024-06-04 13:30:03 UTC
File type:	exe
MIME type:	application/x-dosexec
ssdeep	12288:36Zhu9XvDdhdJ1Gyrz9Xkf7rawndy1E3hc8U/haeXroZW6yOn3sWRp60qx:34Y9X7dxQZjra4dy1E3hcZaUMWwL60O
Threatray	4'153 similar samples on MalwareBazaar
TLSH	T1ED1523884ADEB40BDB195E7972B421C23690C348B3634FAA881035AE1D573C5BB75FF9
TrID	44.4% (.EXE) Win64 Executable (generic) (10523/12/4) 21.3% (.EXE) Win16 NE executable (generic) (5038/12/1) 8.7% (.ICL) Windows Icons Library (generic) (2059/9) 8.5% (.EXE) OS/2 Executable (generic) (2029/13) 8.4% (.EXE) Generic Win/DOS Executable (2002/3)
Reporter	threatcat_ch
Tags:	exe RemcosRAT

Intelligence

File Origin

# of uploads :

# of downloads :

343

Origin country :

Vendor Threat Intelligence

Malware family:

remcos

ID:

File name:

fa55210612a721c8b74a140e3e7423074c40c27c1ce468e0202f6a4d2abdb467.exe

Verdict:

Malicious activity

Analysis date:

2024-06-04 12:55:59 UTC

Tags:

rat remcos remote evasion

Link:

https://app.any.run/tasks/cd013004-05ce-4fa1-8cfb-8bef8c2087bd

Note:

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

Detection(s):

SecuriteInfo.com.Win64.PWSX-gen.7102.13736.UNOFFICIAL

Verdict:

Malicious

Score:

95.7%

Link:

https://cyber-fortress.com/docs/result/index.php?id=665f2583ab69e84d6a2f6025win7simulatehigh_evasion

Tags:

Encryption Generic Static Stealth Remcos

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Launching a process

Searching for synchronization primitives

Сreating synchronization primitives

Connection attempt

Sending a custom TCP request

Launching the default Windows debugger (dwwin.exe)

DNS request

Sending an HTTP GET request

Unauthorized injection to a recently created process

Unauthorized injection to a system process

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

overlay packed remcos

Link:

https://www.filescan.io/uploads/665f0ea76b8dba248b3bf2a5/reports/8f798d2e-6edb-44b7-a5f6-1b5a0378095d/overview

Verdict:

Malicious

Labled as:

Win/malicious_confidence_90%

Link:

https://www.hybrid-analysis.com/sample/fa55210612a721c8b74a140e3e7423074c40c27c1ce468e0202f6a4d2abdb467

Result

Verdict:

MALICIOUS

Details

Windows PE Executable

Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.

Malware family:

REMCOS

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/bc268099-4ef2-415a-a464-7380002504db

Result

Threat name:

Remcos

Detection:

malicious

Classification:

rans.troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1451731

Signature

AI detected suspicious sample

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 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

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for domain / URL

Multi AV Scanner detection for submitted file

Sigma detected: Remcos

Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)

Writes to foreign memory regions

Yara detected AntiVM3

Yara detected Remcos RAT

Yara detected UAC Bypass using CMSTP

Behaviour

Behavior Graph:

Download SVG

Score:

99%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/fa55210612a721c8b74a140e3e7423074c40c27c1ce468e0202f6a4d2abdb467

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/fa55210612a721c8b74a140e3e7423074c40c27c1ce468e0202f6a4d2abdb467/

Threat name:

Win64.Backdoor.Remcos

Status:

Malicious

First seen:

2024-06-04 02:16:26 UTC

File Type:

PE+ (.Net Exe)

Extracted files:

AV detection:

27 of 38 (71.05%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=7jkscbqsu4q4rn2kcqhd45bda5gebqt4dtsgrybaf5ve2kv5wrtq._file

Verdict:

malicious

Label(s):

remcos

RemcosRAT

7c81d05dd82233e0278c83ca0b1a3b3ad9f0fa4b8b56bef98bba964752369754

RemcosRAT

a0c4a547b08cd4669362420f9c50b04f084e0174f13911f4e8b95cec7ba12cd8

RemcosRAT

ab4c9b244a1604655032a8f69acc4273265fa35337906e05a1dc2b274b3b13a6

RemcosRAT

b6eedb3e8a594bc26e68d34f345e0cb276a247458e326bf71276fa93cab52357

RemcosRAT

fcc20fe90b357bafc8ac88a33981885be904b1ce430a4ec8b8aed5caa357df92

RemcosRAT

+ 4'143 additional samples on MalwareBazaar

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos botnet:remotehost rat

Link:

https://tria.ge/reports/240604-p5r6xage3t/

Behaviour

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious use of SetThreadContext

Remcos

Malware Config

C2 Extraction:

45.141.215.89:2404

Unpacked files

SH256 hash:

fa55210612a721c8b74a140e3e7423074c40c27c1ce468e0202f6a4d2abdb467

MD5 hash:

3ff1f7ad040a5a78cdc9489a4905192a

SHA1 hash:

53a35588158374c2b785902beba7b1e15015d8af

Link:

https://www.unpac.me/results/28405e24-6079-4280-948b-9d3cfdc3aa61/

Malware family:

Remcos

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/fa55210612a7/report/overview.html

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

Threat name:

Suspicious File

Score:

0.66

Link:

https://yomi.yoroi.company/submissions/fa55210612a721c8b74a140e3e7423074c40c27c1ce468e0202f6a4d2abdb467

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_no_import_table Create hunting rule
Description:	Detect pe file that no import table

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:	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.

Malspam

RemcosRAT

exe fa55210612a721c8b74a140e3e7423074c40c27c1ce468e0202f6a4d2abdb467

(this sample)

Delivery method

Distributed via e-mail attachment

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 (GUARD_CF)	high

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