MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4c28b6d5329d067a5887a65dd287ddd2bbdfe3e30cfea5cd023ff3971938e9ef. 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: 17

Intelligence 17 IOCs YARA 13 File information Comments

SHA256 hash:	4c28b6d5329d067a5887a65dd287ddd2bbdfe3e30cfea5cd023ff3971938e9ef
SHA3-384 hash:	91b538b9d51c9b8dd7c51d1becfe69dd305045de05abcd6d1b06a3c2dc0e217506358cae090f70d1bc3fa471b1840d5a
SHA1 hash:	1de4480ac0229ae8f9d57f234462fdb5fd64efcb
MD5 hash:	aa56f6c65f085f53c851c0ba89692bab
humanhash:	steak-low-zebra-low
File name:	xQAP5P41U8DI.exe
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	494'592 bytes
First seen:	2024-04-28 16:49:25 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	8d5087ff5de35c3fbb9f212b47d63cad (172 x RemcosRAT)
ssdeep	6144:8XIktXfM8Lv86r9uVWAa2je4Z5zl4hgDHQQs4NTQjoHFsAOZZsAX4cNS5Gv:8X7tPMK8ctGe4Dzl4h2QnuPs/Zszcv
Threatray	3'950 similar samples on MalwareBazaar
TLSH	T194B49E01BAD1C072D57524300D3AF776EAB8BD2028364A7B73D61D5BFE31190B62A6B7
TrID	32.2% (.EXE) Win64 Executable (generic) (10523/12/4) 20.1% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 15.4% (.EXE) Win16 NE executable (generic) (5038/12/1) 13.7% (.EXE) Win32 Executable (generic) (4504/4/1) 6.2% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):
dhash icon	c4d48eaa8ad4d4f8 (1'211 x RemcosRAT, 1 x Worm.Ramnit, 1 x Vjw0rm)
Reporter	pmelson
Tags:	exe remcos RemcosRAT

Intelligence

File Origin

# of uploads :

# of downloads :

386

Origin country :

Vendor Threat Intelligence

Malware family:

remcos

ID:

File name:

4c28b6d5329d067a5887a65dd287ddd2bbdfe3e30cfea5cd023ff3971938e9ef.exe

Verdict:

Malicious activity

Analysis date:

2024-04-28 16:53:46 UTC

Tags:

rat remcos keylogger

Link:

https://app.any.run/tasks/8b67fa9b-5467-4cf8-8eb7-b749ee5200bc

Note:

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

Result

Verdict:

Malware

Maliciousness:

Behaviour

Сreating synchronization primitives

Setting a keyboard event handler

DNS request

Connection attempt

Creating a file

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

crypto evasive exploit explorer fingerprint fingerprint keylogger lolbin shell32

Link:

https://www.filescan.io/uploads/662e7e3b54bafb7d21e42061/reports/ea6103b4-0e94-4030-af8e-450763ee4dff/overview

Verdict:

Malicious

Labled as:

Remcos.Generic

Link:

https://www.hybrid-analysis.com/sample/4c28b6d5329d067a5887a65dd287ddd2bbdfe3e30cfea5cd023ff3971938e9ef

Malware family:

REMCOS

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/9df65930-616a-4d1e-ae7f-0d7f3ffbafea

Result

Threat name:

Remcos

Detection:

malicious

Classification:

rans.troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1432977

Signature

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

Found malware configuration

Installs a global keyboard hook

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Sigma detected: Remcos

Yara detected Remcos RAT

Yara detected UAC Bypass using CMSTP

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/4c28b6d5329d067a5887a65dd287ddd2bbdfe3e30cfea5cd023ff3971938e9ef

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/4c28b6d5329d067a5887a65dd287ddd2bbdfe3e30cfea5cd023ff3971938e9ef/

Threat name:

Win32.Backdoor.Remcos

Status:

Malicious

First seen:

2024-04-28 16:50:06 UTC

File Type:

PE (Exe)

Extracted files:

AV detection:

22 of 23 (95.65%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=jqulnvjstudhuwehuzo5fb652k557y7dbt7kltich7zzogjy5hxq._file

Verdict:

malicious

Label(s):

remcos

RemcosRAT

7c81d05dd82233e0278c83ca0b1a3b3ad9f0fa4b8b56bef98bba964752369754

RemcosRAT

a0c4a547b08cd4669362420f9c50b04f084e0174f13911f4e8b95cec7ba12cd8

RemcosRAT

ab4c9b244a1604655032a8f69acc4273265fa35337906e05a1dc2b274b3b13a6

RemcosRAT

b6eedb3e8a594bc26e68d34f345e0cb276a247458e326bf71276fa93cab52357

RemcosRAT

fcc20fe90b357bafc8ac88a33981885be904b1ce430a4ec8b8aed5caa357df92

RemcosRAT

+ 3'940 additional samples on MalwareBazaar

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos botnet:lux-tihago

Link:

https://tria.ge/reports/240428-vb858acb94/

Behaviour

Suspicious use of SetWindowsHookEx

Malware Config

C2 Extraction:

sendfiletiahforem.ducdns.org:8889

Unpacked files

SH256 hash:

4c28b6d5329d067a5887a65dd287ddd2bbdfe3e30cfea5cd023ff3971938e9ef

MD5 hash:

aa56f6c65f085f53c851c0ba89692bab

SHA1 hash:

1de4480ac0229ae8f9d57f234462fdb5fd64efcb

Detections:

Remcos

win_remcos_w0

win_remcos_auto

malware_windows_remcos_rat

INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM

Link:

https://www.unpac.me/results/4d547217-1710-4634-9ddb-811adf7d14bd/

Malware family:

Remcos

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/4c28b6d5329d/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/4c28b6d5329d067a5887a65dd287ddd2bbdfe3e30cfea5cd023ff3971938e9ef

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:	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_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

File information

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

Web download

RemcosRAT

exe 4c28b6d5329d067a5887a65dd287ddd2bbdfe3e30cfea5cd023ff3971938e9ef

(this sample)

Link

https://www.virustotal.com/gui/file/4c28b6d5329d067a5887a65dd287ddd2bbdfe3e30cfea5cd023ff3971938e9ef/detection

Delivery method

Distributed via web download

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
CHECK_NX	Missing Non-Executable Memory Protection	critical
CHECK_PIE	Missing Position-Independent Executable (PIE) Protection	high

Reviews

ID	Capabilities	Evidence
GDI_PLUS_API	Interfaces with Graphics	gdiplus.dll::GdiplusStartup gdiplus.dll::GdipGetImageEncodersSize gdiplus.dll::GdipGetImageEncoders gdiplus.dll::GdipAlloc
MULTIMEDIA_API	Can Play Multimedia	WINMM.dll::mciSendStringA WINMM.dll::mciSendStringW WINMM.dll::PlaySoundW WINMM.dll::waveInAddBuffer WINMM.dll::waveInClose WINMM.dll::waveInOpen
SECURITY_BASE_API	Uses Security Base API	ADVAPI32.dll::AdjustTokenPrivileges
SHELL_API	Manipulates System Shell	SHELL32.dll::ShellExecuteExA SHELL32.dll::ShellExecuteW
URL_MONIKERS_API	Can Download & Execute components	urlmon.dll::URLDownloadToFileW urlmon.dll::URLOpenBlockingStreamW
WIN32_PROCESS_API	Can Create Process and Threads	KERNEL32.dll::CreateProcessW KERNEL32.dll::CreateProcessA KERNEL32.dll::OpenProcess ADVAPI32.dll::OpenProcessToken KERNEL32.dll::WriteProcessMemory KERNEL32.dll::CloseHandle WININET.dll::InternetCloseHandle
WIN_BASE_API	Uses Win Base API	KERNEL32.dll::TerminateProcess KERNEL32.dll::FindFirstVolumeW KERNEL32.dll::FindNextVolumeW KERNEL32.dll::LoadLibraryExW KERNEL32.dll::LoadLibraryA KERNEL32.dll::GetDriveTypeA
WIN_BASE_EXEC_API	Can Execute other programs	KERNEL32.dll::AllocConsole KERNEL32.dll::WriteConsoleW KERNEL32.dll::ReadConsoleW KERNEL32.dll::SetConsoleOutputCP KERNEL32.dll::SetConsoleTextAttribute KERNEL32.dll::SetStdHandle
WIN_BASE_IO_API	Can Create Files	KERNEL32.dll::CopyFileW KERNEL32.dll::CreateDirectoryW KERNEL32.dll::CreateFileMappingW KERNEL32.dll::CreateFileW KERNEL32.dll::DeleteFileW KERNEL32.dll::DeleteFileA
WIN_BASE_USER_API	Retrieves Account Information	ADVAPI32.dll::GetUserNameW ADVAPI32.dll::LookupPrivilegeValueA KERNEL32.dll::QueryDosDeviceW
WIN_CRYPT_API	Uses Windows Crypt API	ADVAPI32.dll::CryptAcquireContextA ADVAPI32.dll::CryptGenRandom
WIN_REG_API	Can Manipulate Windows Registry	ADVAPI32.dll::RegCreateKeyA ADVAPI32.dll::RegCreateKeyExW ADVAPI32.dll::RegCreateKeyW ADVAPI32.dll::RegDeleteKeyA ADVAPI32.dll::RegOpenKeyExA ADVAPI32.dll::RegOpenKeyExW
WIN_SVC_API	Can Manipulate Windows Services	ADVAPI32.dll::ChangeServiceConfigW ADVAPI32.dll::ControlService ADVAPI32.dll::OpenSCManagerW ADVAPI32.dll::OpenSCManagerA ADVAPI32.dll::OpenServiceW ADVAPI32.dll::QueryServiceConfigW
WIN_USER_API	Performs GUI Actions	USER32.dll::AppendMenuA USER32.dll::EmptyClipboard USER32.dll::OpenClipboard USER32.dll::CreateWindowExA

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