MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 230d403e4d6b1f4e3a7c2e1a7fc33d0f9d34984d782cb3ffee1a3621d260609f. 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 14 File information Comments 1

SHA256 hash:	230d403e4d6b1f4e3a7c2e1a7fc33d0f9d34984d782cb3ffee1a3621d260609f
SHA3-384 hash:	538398b71f699f0eeb3ad9df5d0adbf57211093806ff26ccb8a8178f405af26c65c8c82a4bd1add46e8a34705c19357d
SHA1 hash:	3a13ff10d314c01d9a5ecb766274757dcc508c2b
MD5 hash:	a8e4c5bfdec6d09b86b1a522c2348367
humanhash:	coffee-yankee-indigo-pennsylvania
File name:	a8e4c5bfdec6d09b86b1a522c2348367
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	1'381'799 bytes
First seen:	2024-05-16 05:12:12 UTC
Last seen:	2024-05-16 06:20:43 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	c33cf958e4babaa5af9289de09f91f82 (2 x AgentTesla, 1 x RemcosRAT)
ssdeep	24576:TxB9gs/l97fTp+hmFVrWHGc6H+pvxoOXk81pRNHBoKkoR:/L7bwwBH+1xFXkwpRJZ9R
TLSH	T11F55F119A35C13F4CEBA9034D0565166E7723C19475CAB9F46E80AAFAF232E06E3F714
TrID	48.7% (.EXE) Win64 Executable (generic) (10523/12/4) 23.3% (.EXE) Win16 NE executable (generic) (5038/12/1) 9.3% (.EXE) OS/2 Executable (generic) (2029/13) 9.2% (.EXE) Generic Win/DOS Executable (2002/3) 9.2% (.EXE) DOS Executable Generic (2000/1)
Reporter	zbetcheckin
Tags:	64 exe RemcosRAT

Intelligence

File Origin

# of uploads :

# of downloads :

445

Origin country :

Vendor Threat Intelligence

Malware family:

remcos

ID:

File name:

230d403e4d6b1f4e3a7c2e1a7fc33d0f9d34984d782cb3ffee1a3621d260609f.exe

Verdict:

Malicious activity

Analysis date:

2024-05-16 05:14:16 UTC

Tags:

rat remcos remote

Link:

https://app.any.run/tasks/bf8954fa-07e0-4228-96a4-cf307e3884da

Note:

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

Detection(s):

SecuriteInfo.com.Win64.Evo-gen.16801.23011.UNOFFICIAL

Gathering data

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a file in the %temp% directory

Launching a process

Creating a process with a hidden window

Using the Windows Management Instrumentation requests

Сreating synchronization primitives

Searching for synchronization primitives

Connection attempt

Sending a custom TCP request

Launching the default Windows debugger (dwwin.exe)

Creating a file

Enabling the 'hidden' option for recently created files

Blocking the User Account Control

Unauthorized injection to a recently created process

Unauthorized injection to a recently created process by context flags manipulation

Adding an exclusion to Microsoft Defender

Unauthorized injection to a system process

Verdict:

Suspicious

Threat level:

5/10

Confidence:

100%

Tags:

fingerprint overlay packed remcos

Link:

https://www.filescan.io/uploads/664595e081ea6b1eef423709/reports/d7366db3-dec3-4f0e-9402-89e26775166a/overview

Verdict:

Malicious

Labled as:

Ser.Lazy.Generic

Link:

https://www.hybrid-analysis.com/sample/230d403e4d6b1f4e3a7c2e1a7fc33d0f9d34984d782cb3ffee1a3621d260609f

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:

Cobalt Strike

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/f9b68e01-b427-450e-96a3-14c12b788407

Result

Threat name:

Remcos

Detection:

malicious

Classification:

rans.troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1442396

Signature

Adds a directory exclusion to Windows Defender

Antivirus / Scanner detection for submitted sample

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

Disables UAC (registry)

Encrypted powershell cmdline option found

Found malware configuration

Injects a PE file into a foreign processes

Installs a global keyboard hook

Loading BitLocker PowerShell Module

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for domain / URL

Multi AV Scanner detection for submitted file

Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet

Sigma detected: Remcos

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

Very long command line found

Writes to foreign memory regions

Yara detected AntiVM3

Yara detected Remcos RAT

Yara detected UAC Bypass using CMSTP

Behaviour

Behavior Graph:

Download SVG

Score:

96%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/230d403e4d6b1f4e3a7c2e1a7fc33d0f9d34984d782cb3ffee1a3621d260609f

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/230d403e4d6b1f4e3a7c2e1a7fc33d0f9d34984d782cb3ffee1a3621d260609f/

Threat name:

Win64.Backdoor.Remcos

Status:

Malicious

First seen:

2024-05-15 12:07:54 UTC

File Type:

PE+ (Exe)

AV detection:

19 of 24 (79.17%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=emguapsnnmpu4ot4fynh7qz5b6otjgcnpawlh77odi3cdutamcpq._file

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos botnet:remotehost evasion execution rat trojan

Link:

https://tria.ge/reports/240516-fwed1sdd41/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Suspicious use of SetThreadContext

Uses the VBS compiler for execution

Command and Scripting Interpreter: PowerShell

Remcos

UAC bypass

Windows security bypass

Malware Config

C2 Extraction:

107.173.4.16:2560

Unpacked files

SH256 hash:

230d403e4d6b1f4e3a7c2e1a7fc33d0f9d34984d782cb3ffee1a3621d260609f

MD5 hash:

a8e4c5bfdec6d09b86b1a522c2348367

SHA1 hash:

3a13ff10d314c01d9a5ecb766274757dcc508c2b

Link:

https://www.unpac.me/results/643d26dc-100b-43c1-9bba-5fe923f5f0fd/

Malware family:

Remcos

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/230d403e4d6b/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/230d403e4d6b1f4e3a7c2e1a7fc33d0f9d34984d782cb3ffee1a3621d260609f

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:	meth_stackstrings Create hunting rule
Author:	Willi Ballenthin

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.

Web download

RemcosRAT

exe 230d403e4d6b1f4e3a7c2e1a7fc33d0f9d34984d782cb3ffee1a3621d260609f

(this sample)

Delivery method

Distributed via web download

URLhaus

https://urlhaus.abuse.ch/url/2851544/

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

Reviews

ID	Capabilities	Evidence
WIN32_PROCESS_API	Can Create Process and Threads	KERNEL32.dll::CreateProcessA KERNEL32.dll::CloseHandle
WIN_BASE_API	Uses Win Base API	KERNEL32.dll::TerminateProcess KERNEL32.dll::LoadLibraryExW KERNEL32.dll::GetStartupInfoW KERNEL32.dll::GetCommandLineA KERNEL32.dll::GetCommandLineW
WIN_BASE_EXEC_API	Can Execute other programs	KERNEL32.dll::AllocConsole KERNEL32.dll::WriteConsoleW KERNEL32.dll::FreeConsole KERNEL32.dll::ReadConsoleW KERNEL32.dll::SetStdHandle KERNEL32.dll::GetConsoleOutputCP KERNEL32.dll::GetConsoleMode
WIN_BASE_IO_API	Can Create Files	KERNEL32.dll::CreateFileW

Comments

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zbet commented on 2024-05-16 05:12:12 UTC

url : hxxp://23.94.36.162/4505/vnc.exe