MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 bc31d564f5bdc70e314cac621b14195ebf53aa8b74f1de6350e60de691f2c728. 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: 19

Intelligence 19 IOCs YARA 15 File information Comments

SHA256 hash:	bc31d564f5bdc70e314cac621b14195ebf53aa8b74f1de6350e60de691f2c728
SHA3-384 hash:	17704aad9c69a2373856c62eea92ac64a4760f3b20334abc66d70b256242273e103bfa9f4c46feacbfcbb2902b4c82ca
SHA1 hash:	110e498dab1d844f3fe230c4d703332faca6d38f
MD5 hash:	10a55a8b8f7c517b126b149a2721cf7b
humanhash:	rugby-xray-william-speaker
File name:	1744182663d3408b7a85c2d02827688d9b28594d2c4bf4884d6b66d21c5c45411256ce913f254.dat-decoded
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	498'688 bytes
First seen:	2025-04-09 07:11:04 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	41e05d591d7d93bdd5bc6d5da04da74b (52 x RemcosRAT, 1 x Expiro)
ssdeep	6144:CIlSCa0RPvRz+n8Qr1D0ZGESuHabmvHOE4mCp6qtydBnP+Y4+3sAORZ/FXvXc6CJ:C200OFp+G0imvHn3Cp6qyBP+YdsvZ/c
Threatray	759 similar samples on MalwareBazaar
TLSH	T13CB4BF01B9E2C172D57654300D2AE776DEBCBD2028358D7BB3D60D57FE30190AA39AB6
TrID	32.2% (.EXE) Win64 Executable (generic) (10522/11/4) 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)
Magika	pebin
dhash icon	c4d48eaa8ad4d4f8 (1'000 x RemcosRAT, 1 x Worm.Ramnit, 1 x Vjw0rm)
Reporter	abuse_ch
Tags:	base64-decoded exe RemcosRAT

abuse_ch

Malware dropped as base64 encoded payload

Intelligence

File Origin

# of uploads :

# of downloads :

541

Origin country :

Vendor Threat Intelligence

Malware family:

remcos

ID:

File name:

1744182663d3408b7a85c2d02827688d9b28594d2c4bf4884d6b66d21c5c45411256ce913f254.dat-decoded.exe

Verdict:

Malicious activity

Analysis date:

2025-04-09 07:16:32 UTC

Tags:

rat remcos remote

Link:

https://app.any.run/tasks/dac7d1be-be6e-45bb-bebe-ab73496f13b4

Note:

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

Verdict:

Malicious

Score:

99.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=67f61ecff9ba909217cd963d

Tags:

ransomware dropper remcos keylog

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

Сreating synchronization primitives

Setting a keyboard event handler

DNS request

Connection attempt

Sending a custom TCP request

Sending an HTTP GET request

Creating a file

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

cmd config-extracted crypto evasive exploit explorer fingerprint fingerprint keylogger lolbin microsoft_visual_cc packed rat remcos remcos windows

Link:

https://www.filescan.io/uploads/67f61d8deb7eb0aee042c21f/reports/9119fe13-70ed-43ad-970f-38bcc8cbe1d3/overview

Verdict:

Malicious

Labled as:

Trojan.Remcos

Link:

https://www.hybrid-analysis.com/sample/bc31d564f5bdc70e314cac621b14195ebf53aa8b74f1de6350e60de691f2c728

Malware family:

REMCOS

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/7b7f8165-c511-4358-8ce3-50dde62850ae

Result

Threat name:

Remcos

Detection:

malicious

Classification:

troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1660450

Signature

Antivirus / Scanner detection for submitted sample

Antivirus detection for URL or domain

C2 URLs / IPs found in malware configuration

Deletes itself after installation

Disable UAC(promptonsecuredesktop)

Found malware configuration

Installs a global keyboard hook

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Sigma detected: Remcos

Sigma detected: Script Interpreter Execution From Suspicious Folder

Sigma detected: Suspicious Script Execution From Temp Folder

Sigma detected: WScript or CScript Dropper

Suricata IDS alerts for network traffic

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/bc31d564f5bdc70e314cac621b14195ebf53aa8b74f1de6350e60de691f2c728

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/bc31d564f5bdc70e314cac621b14195ebf53aa8b74f1de6350e60de691f2c728/

Threat name:

Win32.Backdoor.Remcos

Status:

Malicious

First seen:

2025-04-08 19:06:49 UTC

File Type:

PE (Exe)

Extracted files:

AV detection:

24 of 24 (100.00%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=xqy5kzhvxxdq4mkmvrrbwfazl27vhkuloty54y2q4yg6nepsy4ua._file

Verdict:

malicious

Label(s):

remcos

RemcosRAT

23efc4aa5ee5d99b8f693df2f9864c08c4d65acc359d54aaf97acbc30a871c02

RemcosRAT

3412190c457713b0bbaab663590654aac3d8ef9f30af78f45dd9a0d581f49e59

RemcosRAT

75fed14fd61067a1c0c2a10d0eefcc349308e1f4a1993a075a9f0c768affab13

RemcosRAT

78cc96452121dc657a87c79561272f3669f781d24265a7a2ab853a5670fff80d

RemcosRAT

bc31d564f5bdc70e314cac621b14195ebf53aa8b74f1de6350e60de691f2c728

RemcosRAT

error

RemcosRAT

fa1c16a3024d35ebc4f6996d1791ead89a08dae2ebd87e39c9997c04613c4645

RemcosRAT

fa61518375428781260a99edf971bcc98b70df3e7c5d2887367393f4e206f30d

RemcosRAT

+ 749 additional samples on MalwareBazaar

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos botnet:new discovery

Link:

https://tria.ge/reports/250409-hzz61aszaz/

Behaviour

Suspicious use of SetWindowsHookEx

System Location Discovery: System Language Discovery

Malware Config

C2 Extraction:

remsw.ydns.eu:23101
001remsw.ydns.eu:23101
rem002sw.ydns.eu:23101
dip.realmensw.com:23101
sw004rem.ydns.eu:23101
rem001sw.ydns.eu:23101

Verdict:

Malicious

Tags:

rat remcos Win.Trojan.Remcos-9841897-0

YARA:

malware_windows_remcos_rat REMCOS_RAT_variants Remcos_Payload win_remcos_rat_unpacked Windows_Trojan_Remcos_b296e965 MAL_EXE_Remcos_RAT_Jul_22 Remcos

Link:

https://app.threat.zone/submission/fb835500-99d7-4ab9-90d8-bfee2e1ce4cc

Unpacked files

SH256 hash:

bc31d564f5bdc70e314cac621b14195ebf53aa8b74f1de6350e60de691f2c728

MD5 hash:

10a55a8b8f7c517b126b149a2721cf7b

SHA1 hash:

110e498dab1d844f3fe230c4d703332faca6d38f

Detections:

win_remcos_w0

win_remcos_auto

Remcos

Link:

https://www.unpac.me/results/ac355bee-13ca-447a-bc15-36163157eb39/

Malware family:

Remcos

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/bc31d564f5bd/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/bc31d564f5bdc70e314cac621b14195ebf53aa8b74f1de6350e60de691f2c728

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:	cobalt_strike_tmp01925d3f Create hunting rule
Author:	The DFIR Report
Description:	files - file ~tmp01925d3f.exe
Reference:	https://thedfirreport.com

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

Rule name:	Disable_Defender Create hunting rule
Author:	iam-py-test
Description:	Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen

Rule name:	golang_bin_JCorn_CSC846 Create hunting rule
Author:	Justin Cornwell
Description:	CSC-846 Golang detection ruleset

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:	pe_detect_tls_callbacks Create hunting rule

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

Rule name:	REMCOS_RAT_variants Create hunting rule

Rule name:	Remcos_unpacked_PulseIntel Create hunting rule
Author:	PulseIntel
Description:	Remcos Payload

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.

d3408b7a85c2d02827688d9b28594d2c4bf4884d6b66d21c5c45411256ce913f

RemcosRAT

exe bc31d564f5bdc70e314cac621b14195ebf53aa8b74f1de6350e60de691f2c728

(this sample)

Dropped by

SHA256 d3408b7a85c2d02827688d9b28594d2c4bf4884d6b66d21c5c45411256ce913f

Dropped by

MD5 d7c73679da7f474db7bdfe5e1d631497

URLhaus

https://urlhaus.abuse.ch/url/3505204/

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 ADVAPI32.dll::GetTokenInformation
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::LoadLibraryA KERNEL32.dll::LoadLibraryW KERNEL32.dll::LoadLibraryExW
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::CreateFileW KERNEL32.dll::DeleteFileW KERNEL32.dll::DeleteFileA KERNEL32.dll::MoveFileExW KERNEL32.dll::MoveFileW
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::RegCreateKeyExW ADVAPI32.dll::RegCreateKeyW ADVAPI32.dll::RegCreateKeyA 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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