MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f90e79ce4d5d11db542e5b30fdc7fe992f9e38fe400a67dbd7845d493107e1d4. 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: 15

Intelligence 15 IOCs YARA 17 File information Comments

SHA256 hash:	f90e79ce4d5d11db542e5b30fdc7fe992f9e38fe400a67dbd7845d493107e1d4
SHA3-384 hash:	e3b144265baef94ecacdcac74d5b1127906cf386dba1e7f8d50f998f8a6a8c6ba72949e00f5f1c98d53b2b1f0417bba3
SHA1 hash:	d6a318bcbcf66741c149cf8400e871e88a25c480
MD5 hash:	f63122fc4b0c96f8b0b973eca4b964c7
humanhash:	nevada-four-maine-fillet
File name:	QUOTATION#06232024.exe
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	3'513'441 bytes
First seen:	2024-06-24 06:32:58 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
ssdeep	24576:7l/RL9ZVoj/NAPgUbuci4IKZuXRfpcE/07:5pL9ZVojlAPxbuciYAhfpp/A
TLSH	T17DF5FF067D236D43BC498562E8EA72FD15FE5E5FBDF1A20FCF49AC64A2222BC1115831
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)
File icon (PE):
dhash icon	4c33d8d4d4d8324c (40 x AgentTesla, 23 x RedLineStealer, 15 x RemcosRAT)
Reporter	lowmal3
Tags:	exe RemcosRAT

Intelligence

File Origin

# of uploads :

# of downloads :

357

Origin country :

Vendor Threat Intelligence

Malware family:

remcos

ID:

File name:

f90e79ce4d5d11db542e5b30fdc7fe992f9e38fe400a67dbd7845d493107e1d4.exe

Verdict:

Malicious activity

Analysis date:

2024-06-24 06:36:33 UTC

Tags:

rat remcos keylogger stealer evasion mpress

Link:

https://app.any.run/tasks/0086c9b4-2341-4659-97c5-a10a57995339

Note:

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

Detection(s):

SecuriteInfo.com.Win64.PWSX-gen.22522.18190.UNOFFICIAL

Verdict:

Malicious

Score:

94.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=667913218bee61523c5d13f4win7simulatehigh_evasion

Tags:

Encryption Execution Generic Network 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

Creating a file

Reading critical registry keys

Creating a file in the %temp% directory

Unauthorized injection to a recently created process

Unauthorized injection to a recently created process by context flags manipulation

Stealing user critical data

Unauthorized injection to a system process

Verdict:

Suspicious

Threat level:

5/10

Confidence:

100%

Tags:

overlay remcos

Link:

https://www.filescan.io/uploads/66791320ef9fdf64aa6e689d/reports/90c17228-571b-4ec5-aa7f-932c2d1f80fe/overview

Verdict:

Malicious

Labled as:

MSILHeracles.Generic

Link:

https://www.hybrid-analysis.com/sample/f90e79ce4d5d11db542e5b30fdc7fe992f9e38fe400a67dbd7845d493107e1d4

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.

Verdict:

Suspicious

Link:

https://analyze.intezer.com/analyses/273577a4-76e6-49cb-9829-b704dd2018c0

Result

Threat name:

Remcos

Detection:

malicious

Classification:

rans.phis.troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1461473

Signature

.NET source code references suspicious native API functions

AI detected suspicious sample

Allocates memory in foreign processes

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

Initial sample is a PE file and has a suspicious name

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

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 regedit.exe to modify the Windows registry

Writes to foreign memory regions

Yara detected AntiVM3

Yara detected Remcos RAT

Yara detected UAC Bypass using CMSTP

Yara detected WebBrowserPassView password recovery tool

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/f90e79ce4d5d11db542e5b30fdc7fe992f9e38fe400a67dbd7845d493107e1d4

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/f90e79ce4d5d11db542e5b30fdc7fe992f9e38fe400a67dbd7845d493107e1d4/

Threat name:

Win64.Backdoor.Remcos

Status:

Malicious

First seen:

2024-06-24 05:10:29 UTC

File Type:

PE+ (.Net Exe)

Extracted files:

AV detection:

20 of 24 (83.33%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=7ehhttsnlui5wvbolmyp3r76texz4oh6iafgpw6xqrousmih4hka._file

Verdict:

unknown

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos botnet:remotehost collection rat

Link:

https://tria.ge/reports/240624-ha7jsazalc/

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

Uses the VBS compiler for execution

NirSoft MailPassView

NirSoft WebBrowserPassView

Nirsoft

Remcos

Malware Config

C2 Extraction:

23.95.60.82:4445

Unpacked files

SH256 hash:

f90e79ce4d5d11db542e5b30fdc7fe992f9e38fe400a67dbd7845d493107e1d4

MD5 hash:

f63122fc4b0c96f8b0b973eca4b964c7

SHA1 hash:

d6a318bcbcf66741c149cf8400e871e88a25c480

Link:

https://www.unpac.me/results/f58542a6-32d1-41e6-b6fa-18c6f54c1ec0/

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/f90e79ce4d5d11db542e5b30fdc7fe992f9e38fe400a67dbd7845d493107e1d4

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

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

Rule name:	REMCOS_RAT_variants 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

File information

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

Malspam

RemcosRAT

exe f90e79ce4d5d11db542e5b30fdc7fe992f9e38fe400a67dbd7845d493107e1d4

(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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