MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 731ae18f35cdcefa9d8ad03ceb602a3655085cc343a6e5bc3ad0ba8108d00837. 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 21 File information Comments
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SHA256 hash: 731ae18f35cdcefa9d8ad03ceb602a3655085cc343a6e5bc3ad0ba8108d00837
SHA3-384 hash: 15a03fb513ad0da730d40f902110201607fcd1c27362384a04c837c2df385447eacfb75558e07091bd2db1c5afc321ac
SHA1 hash: 01e3ace3d12adcd0aafb08313bbd962897735d65
MD5 hash: fe868e87888e7e76f8a4eb916308cdba
humanhash: snake-juliet-low-early
File name:CopilotDriver.js
Download: download sample
Signature RemcosRAT
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File size:4'427'935 bytes
First seen:2026-02-27 16:16:33 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 192:mmhC3+ldTNuTGB3cFSlPOM8HZyc63/Y2eyExruXPa2zvc6Kdk32Df6dWV02kWj/X:O+AaWj9xiXii2LJsFwbPBkY5owEy
Threatray 2'169 similar samples on MalwareBazaar
TLSH T18626125404672EE40FC9C35DF725E878EB62B41629631DECE243F18B4CCAB8A749B4E5
Magika javascript
Reporter abuse_ch
Tags:js RAT RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
167
Origin country :
SE SE
Vendor Threat Intelligence
No detections
Detection(s):
SecuriteInfo.com.JS.Packed.164.18362.27771.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
90.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=69a1c38ec950ab5d9ab223ec
Tags:
obfuscate xtreme shell
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm base64 base64 fingerprint obfuscated obfuscated overlay powershell repaired
Link:
https://www.filescan.io/uploads/69a1c38bcd25bfe1dfdc077a/reports/0f1b5821-e255-4bb4-8817-e7172837f061/overview
Verdict:
Malicious
Labled as:
GT:JS.ObfPadding.1
Link:
https://www.hybrid-analysis.com/sample/731ae18f35cdcefa9d8ad03ceb602a3655085cc343a6e5bc3ad0ba8108d00837
Verdict:
Malicious
File Type:
js
Detections:
Trojan.JS.SAgent.sb HEUR:Trojan.Script.Generic
Link:
https://opentip.kaspersky.com/731ae18f35cdcefa9d8ad03ceb602a3655085cc343a6e5bc3ad0ba8108d00837/results?tab=lookup
Result
Threat name:
Remcos
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Detection:
malicious
Classification:
rans.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1876049
Signature
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
Creates processes via WMI
Detected Remcos RAT
Found malware configuration
Found Tor onion address
Injects a PE file into a foreign processes
Installs a global keyboard hook
JavaScript source code contains functionality to generate code involving a shell, file or stream
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: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: Remcos
Sigma detected: WScript or CScript Dropper
Suricata IDS alerts for network traffic
Suspicious execution chain found
Suspicious powershell command line found
Unusual module load detection (module proxying)
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 Powershell decode and execute
Yara detected Powershell download and execute
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1876049 Sample: CopilotDriver.js Startdate: 27/02/2026 Architecture: WINDOWS Score: 100 23 msidownloads.duckdns.org 2->23 25 systemcopilotdrivers.ydns.eu 2->25 27 7 other IPs or domains 2->27 43 Suricata IDS alerts for network traffic 2->43 45 Found malware configuration 2->45 47 Malicious sample detected (through community Yara rule) 2->47 51 13 other signatures 2->51 8 wscript.exe 1 2->8         started        signatures3 49 Uses dynamic DNS services 23->49 process4 signatures5 53 Suspicious powershell command line found 8->53 55 Wscript starts Powershell (via cmd or directly) 8->55 57 Windows Scripting host queries suspicious COM object (likely to drop second stage) 8->57 59 2 other signatures 8->59 11 powershell.exe 14 16 8->11         started        process6 dnsIp7 29 archive.org 207.241.224.2, 49718, 80 INTERNET-ARCHIVEUS United States 11->29 31 systemcopilotdrivers.ydns.eu 181.206.158.190, 3001, 49724, 49726 ColombiaMovilCO Colombia 11->31 33 dn721500.ca.archive.org 204.62.246.254, 443, 49719, 49721 COGENT-174US United States 11->33 61 Found Tor onion address 11->61 63 Writes to foreign memory regions 11->63 65 Injects a PE file into a foreign processes 11->65 15 MSBuild.exe 4 2 11->15         started        19 conhost.exe 11->19         started        signatures8 process9 file10 21 C:\ProgramData\Copilotdrivers\logs.dat, data 15->21 dropped 35 Contains functionality to bypass UAC (CMSTPLUA) 15->35 37 Detected Remcos RAT 15->37 39 Contains functionalty to change the wallpaper 15->39 41 5 other signatures 15->41 signatures11
Gathering data
Detection:
remcos
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Link:
https://mwdb.cert.pl/sample/731ae18f35cdcefa9d8ad03ceb602a3655085cc343a6e5bc3ad0ba8108d00837/
Verdict:
Malicious
Threat:
Family.REVERSELOADER
Link:
https://tip.neiki.dev/file/731ae18f35cdcefa9d8ad03ceb602a3655085cc343a6e5bc3ad0ba8108d00837
Threat name:
Script-JS.Trojan.ObfPadding
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Status:
Malicious
First seen:
2026-02-27 16:17:26 UTC
File Type:
Binary
AV detection:
6 of 24 (25.00%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=omnoddzvzxhpvhmk2a6owybkgzkqqxgdiotolpb22c5iccgqba3q._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
2516cc29b6eebbe044641f7772e61549278d0d1e164c8a75f98b884fcce2ff40
RemcosRAT
5af513338418844a6202140f439662cc703e801e8195c2c632161b63594fe93c
RemcosRAT
5e28547345b1ded1040b2fefc75d0b633a4c8ef0dce4f9e76d9d22238832063e
RemcosRAT
8848e239974fd64817049eb47c0fe8075b14a54e02cd5c83362589648c9b2c09
RemcosRAT
91baa6693a7101a106695f9eac9ecbbf6d6da66fd9a64f619ef3b18b268140a6
RemcosRAT
b72ad9f5170c18afe5788fff799541fa6e034702ebde25f35279ea39e5385a67
RemcosRAT
c86ebb0e9a245fbe86a024641eb2a7dc236351c98ef98392ea366539b509827d
RemcosRAT
d981c2a5f48e1c8d771a96fdded17e488ae1f5f5e0d182f9a40e7b25c8a7f501
RemcosRAT
e7562cf6a40504db3c0a6fecef27cf39901be33c9d3031cbc6056fe848ae9714
RemcosRAT
error
RemcosRAT
fe955f2d186ba5e8077fc25ddee450bf0b8bcc998df7adf67038a776b93569cb
RemcosRAT
+ 2'159 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:tar1 defense_evasion discovery execution rat trojan
Link:
https://tria.ge/reports/260227-trgkgae15c/
Behaviour
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: JavaScript
System Location Discovery: System Language Discovery
Drops file in Windows directory
Suspicious use of SetThreadContext
Badlisted process makes network request
Command and Scripting Interpreter: PowerShell
Process spawned unexpected child process
Remcos
Remcos family
UAC bypass
Malware Config
C2 Extraction:
systemcopilotdrivers.ydns.eu:3001
Dropper Extraction:
http://archive.org/download/optimized_msi_20260227_1420/optimized_MSI.png%20
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.55
Link:
https://yomi.yoroi.company/submissions/731ae18f35cdcefa9d8ad03ceb602a3655085cc343a6e5bc3ad0ba8108d00837

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_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_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_921ef449
Create hunting rule
Author:Elastic Security
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

Java Script (JS) js 731ae18f35cdcefa9d8ad03ceb602a3655085cc343a6e5bc3ad0ba8108d00837

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3597687/
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3597686/

Comments