MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b845f07952a9e0ba15c8e3e3098c9a0f5bc28cf9449e31040289cc5e63f58595. 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: 13

Intelligence 13 IOCs YARA 26 File information Comments

SHA256 hash:	b845f07952a9e0ba15c8e3e3098c9a0f5bc28cf9449e31040289cc5e63f58595
SHA3-384 hash:	de336d3de804658cf879848b1e2b558246b6e0ae8dbc1aea3a5abb7ebf86726a63e5ffc3673bc29e2e0b0151de3fbfcb
SHA1 hash:	a32dfcaac7f528c8d2eb6834d4d6f6dd9098bef2
MD5 hash:	4f2f0f4f95f4e1db480248082c47a6db
humanhash:	stream-sodium-alaska-november
File name:	andre.vbs
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	3'445'154 bytes
First seen:	2025-09-15 08:26:22 UTC
Last seen:	Never
File type:	vbs
MIME type:	text/plain
ssdeep	384:afWfGfWfGfWfXfWfGfWfGfWfGfWfGfWfGfWfGfWfGfWfGfWfGfWfGfWfGfWfGfW0:catqVTc7Ay6mmmmmmmmmmmmmmY
Threatray	1'513 similar samples on MalwareBazaar
TLSH	T135F541A125F4145CB7FB3F1A68BA12116F3B7C869E3D826E014541069FEAED4CDB1B32
TrID	66.6% (.TXT) Text - UTF-16 (LE) encoded (2000/1) 33.3% (.MP3) MP3 audio (1000/1)
Magika	vba
Reporter	abuse_ch
Tags:	RAT RemcosRAT vbs

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

Vendor Threat Intelligence

Detection:

n/a

Link:

https://www.capesandbox.com/analysis/27490/

Verdict:

Malicious

Score:

96.5%

Link:

https://cyber-fortress.com/docs/result/index.php?id=68c7cdb9e579c633a4b55530

Tags:

xtreme virus shell

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

base64 evasive obfuscated powershell

Link:

https://www.filescan.io/uploads/68c7cdf473287948292a33ce/reports/6b9786d8-ecd0-47bf-90af-9d18d0149e82/overview

Verdict:

Unknown

Link:

https://www.hybrid-analysis.com/sample/b845f07952a9e0ba15c8e3e3098c9a0f5bc28cf9449e31040289cc5e63f58595

Verdict:

Malicious

File Type:

text

First seen:

2025-09-13T10:08:00Z UTC

Last seen:

2025-09-13T10:08:00Z UTC

Hits:

~10

Link:

https://opentip.kaspersky.com/b845f07952a9e0ba15c8e3e3098c9a0f5bc28cf9449e31040289cc5e63f58595/results?tab=lookup

Result

Threat name:

Remcos

Detection:

malicious

Classification:

rans.troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1777584

Signature

.NET source code contains potential unpacker

Antivirus detection for URL or domain

Bypasses PowerShell execution policy

C2 URLs / IPs found in malware configuration

Connects to a pastebin service (likely for C&C)

Contains functionality to register a low level keyboard hook

Contains functionalty to change the wallpaper

Detected Remcos RAT

Encrypted powershell cmdline option found

Found malware configuration

Found suspicious powershell code related to unpacking or dynamic code loading

Injects a PE file into a foreign processes

Installs a global keyboard hook

Joe Sandbox ML detected suspicious sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Sigma detected: Base64 Encoded PowerShell Command Detected

Sigma detected: Potential PowerShell Command Line Obfuscation

Sigma detected: Potential PowerShell Obfuscation Via Reversed Commands

Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet

Sigma detected: Remcos

Sigma detected: Script Interpreter Execution From Suspicious Folder

Sigma detected: Silenttrinity Stager Msbuild Activity

Sigma detected: Suspicious Script Execution From Temp Folder

Sigma detected: WScript or CScript Dropper

Suricata IDS alerts for network traffic

Suspicious execution chain found

Suspicious powershell command line found

Uses dynamic DNS services

Windows Scripting host queries suspicious COM object (likely to drop second stage)

Writes to foreign memory regions

Wscript starts Powershell (via cmd or directly)

Yara detected Generic Downloader

Yara detected Powershell download and execute

Yara detected Remcos RAT

Yara detected UAC Bypass using CMSTP

Behaviour

Behavior Graph:

Download SVG

Score:

58%

Verdict:

Susipicious

File Type:

SCRIPT

Link:

https://malprob.io/report/b845f07952a9e0ba15c8e3e3098c9a0f5bc28cf9449e31040289cc5e63f58595

Verdict:

Malware

YARA:

2 match(es)

Tags:

DeObfuscated Obfuscated PowerShell T1059.005 VBS Execute Sub-Script VBScript WScript.Shell

Link:

https://app.malva.re/file/4f2f0f4f95f4e1db480248082c47a6db

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/b845f07952a9e0ba15c8e3e3098c9a0f5bc28cf9449e31040289cc5e63f58595/

Threat name:

Win32.Trojan.Honolulu

Status:

Malicious

First seen:

2025-09-13 07:01:22 UTC

File Type:

Text (VBS)

AV detection:

4 of 38 (10.53%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=xbc7a6ksvhqlufoi4prqtde2b5n4fdhzispdcbacrhgf4y7vqwkq._file

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos discovery execution rat

Link:

https://tria.ge/reports/250915-kb93eagm3s/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Suspicious use of SetThreadContext

Command and Scripting Interpreter: PowerShell

Legitimate hosting services abused for malware hosting/C2

Checks computer location settings

Badlisted process makes network request

Remcos

Remcos family

Malware Config

C2 Extraction:

rem0925.duckdns.org:3585

Dropper Extraction:

https://textbin.net/raw/xsi2eulwpw

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/b845f07952a9e0ba15c8e3e3098c9a0f5bc28cf9449e31040289cc5e63f58595

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:	CP_AllMal_Detector Create hunting rule
Author:	DiegoAnalytics
Description:	CrossPlatform All Malwares Detector: Detect PE, ELF, Mach-O, scripts, archives; overlay, obfuscation, encryption, spoofing, hiding, high entropy, network communication

Rule name:	CP_Script_Inject_Detector Create hunting rule
Author:	DiegoAnalytics
Description:	Detects attempts to inject code into another process across PE, ELF, Mach-O binaries

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

Rule name:	DetectEncryptedVariants Create hunting rule
Author:	Zinyth
Description:	Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded

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:	FreddyBearDropper Create hunting rule
Author:	Dwarozh Hoshiar
Description:	Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.

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:	NET Create hunting rule
Author:	malware-lu

Rule name:	pe_detect_tls_callbacks Create hunting rule

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

Rule name:	remcos_ Create hunting rule
Author:	Michelle Khalil
Description:	This rule detects unpacked remcos malware samples.

Rule name:	REMCOS_RAT_variants Create hunting rule

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

Rule name:	Sus_CMD_Powershell_Usage Create hunting rule
Author:	XiAnzheng
Description:	May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)

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

vbs b845f07952a9e0ba15c8e3e3098c9a0f5bc28cf9449e31040289cc5e63f58595

(this sample)

URLhaus

https://urlhaus.abuse.ch/url/3620016/

Delivery method

Distributed via web download

URLhaus

https://urlhaus.abuse.ch/url/3620017/

URLhaus

https://urlhaus.abuse.ch/url/3619992/

URLhaus

https://urlhaus.abuse.ch/url/3619988/

Cape

https://www.capesandbox.com/analysis/27490/

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