MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 301f159cf144cbe704b265c941b6761c80ea79b8d10aa9697a0c069c5b887521. 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: 9


Intelligence 9 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 301f159cf144cbe704b265c941b6761c80ea79b8d10aa9697a0c069c5b887521
SHA3-384 hash: a278d2c5fe14ba894c7b36d2ed5a38ec43d3cb425320a699b831cc48258d934d6a0fcf37297cc84ddab36df21ea24bd7
SHA1 hash: c6d56bde19c7d36910c1c2a1d146724a23a558e5
MD5 hash: 5e7eeb8aa9374bea9df5046133c62278
humanhash: enemy-may-pizza-johnny
File name:CopilotDrivers.js
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'150'781 bytes
First seen:2025-09-01 16:18:50 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 1536:4pNl8qtGMje+jEzD5yJBPlSuFD5wUCag6fVEWSEVsqbP1kLwQ224Gxn8EJhX0gby:4pztypz6
Threatray 109 similar samples on MalwareBazaar
TLSH T1B635D6C5374B07A8A5E88DE60158150779E6909F38772AE7DDF2FB47242BF943B24238
Magika scss
Reporter abuse_ch
Tags:js RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
79
Origin country :
SE SE
Vendor Threat Intelligence
Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68b5c7a0eb163e0ec1841939
Tags:
obfuscate xtreme spawn
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/301f159cf144cbe704b265c941b6761c80ea79b8d10aa9697a0c069c5b887521
Verdict:
Malicious
File Type:
js
First seen:
2025-09-01T15:01:00Z UTC
Last seen:
2025-09-01T15:01:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/301f159cf144cbe704b265c941b6761c80ea79b8d10aa9697a0c069c5b887521/results?tab=lookup
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1769085
Signature
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
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Malicious sample detected (through community Yara rule)
Sigma detected: Base64 Encoded PowerShell Command Detected
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
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
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1769085 Sample: CopilotDrivers.js Startdate: 01/09/2025 Architecture: WINDOWS Score: 100 41 systemcopilotdriver.ydns.eu 2->41 43 ia601009.us.archive.org 2->43 45 3 other IPs or domains 2->45 61 Suricata IDS alerts for network traffic 2->61 63 Found malware configuration 2->63 65 Malicious sample detected (through community Yara rule) 2->65 67 14 other signatures 2->67 10 powershell.exe 14 15 2->10         started        14 wscript.exe 1 2->14         started        signatures3 process4 dnsIp5 47 archive.org 207.241.224.2, 443, 49721 INTERNET-ARCHIVEUS United States 10->47 49 ia601009.us.archive.org 207.241.227.39, 443, 49722 INTERNET-ARCHIVEUS United States 10->49 51 cdn.discordapp.com 162.159.134.233, 443, 49723 CLOUDFLARENETUS United States 10->51 79 Found Tor onion address 10->79 81 Writes to foreign memory regions 10->81 83 Injects a PE file into a foreign processes 10->83 16 MSBuild.exe 7 10 10->16         started        21 conhost.exe 10->21         started        85 Windows Scripting host queries suspicious COM object (likely to drop second stage) 14->85 87 Creates processes via WMI 14->87 signatures6 process7 dnsIp8 37 systemcopilotdriver.ydns.eu 181.206.158.190, 3001, 49724, 49727 ColombiaMovilCO Colombia 16->37 39 geoplugin.net 178.237.33.50, 49725, 80 ATOM86-ASATOM86NL Netherlands 16->39 33 Optimizador Ligero...jecuci n Oculta.vbs, ASCII 16->33 dropped 35 C:\ProgramData\remcos\registros.dat, data 16->35 dropped 53 Contains functionality to bypass UAC (CMSTPLUA) 16->53 55 Detected Remcos RAT 16->55 57 Contains functionalty to change the wallpaper 16->57 59 4 other signatures 16->59 23 wscript.exe 1 16->23         started        file9 signatures10 process11 signatures12 69 Suspicious powershell command line found 23->69 71 Wscript starts Powershell (via cmd or directly) 23->71 73 Windows Scripting host queries suspicious COM object (likely to drop second stage) 23->73 75 Suspicious execution chain found 23->75 26 powershell.exe 36 23->26         started        process13 signatures14 77 Loading BitLocker PowerShell Module 26->77 29 conhost.exe 26->29         started        31 WmiPrvSE.exe 26->31         started        process15
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/301f159cf144cbe704b265c941b6761c80ea79b8d10aa9697a0c069c5b887521/
Threat name:
Script-JS.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2025-09-01 16:20:49 UTC
File Type:
Binary
AV detection:
9 of 38 (23.68%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=gaprlhhritf6obfsmxeudntwdsaou6ny2efks2l2bqdjyw4iouqq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
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RemcosRAT
error
RemcosRAT
+ 99 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos defense_evasion discovery execution rat trojan
Link:
https://tria.ge/reports/250901-ttbf8symz6/
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:
systemcopilotdriver.ydns.eu:3001
Dropper Extraction:
https://archive.org/download/optimized_msi_20250821/optimized_MSI.png
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/301f159cf144cbe704b265c941b6761c80ea79b8d10aa9697a0c069c5b887521

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: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)

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 301f159cf144cbe704b265c941b6761c80ea79b8d10aa9697a0c069c5b887521

(this sample)

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

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