MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3a1cc2ad702cc9c16b1ecb0ddca2f00f8fd041bb246e36e7af4920a0ee025f4e. 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: 12


Intelligence 12 IOCs YARA File information Comments

SHA256 hash: 3a1cc2ad702cc9c16b1ecb0ddca2f00f8fd041bb246e36e7af4920a0ee025f4e
SHA3-384 hash: 8d120383dd03139cff7e01f1e07843831ef6ed28a4da062c1945ae4d513750fec69d695b080c1c613c60ead6686b6228
SHA1 hash: 718cd17f89d4b06ef504aa80186d81e8c8b84d75
MD5 hash: 1751633064c9cc1151c0d50bec8ebc17
humanhash: butter-delta-emma-nine
File name:CopilotDrivers.js
Download: download sample
Signature RemcosRAT
File size:6'927'343 bytes
First seen:2025-11-16 17:03:57 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 1536:DF26HqN1ZfjkMp5XLrfY5HTXy4oawa9Fr4I+4prnCpE:V
Threatray 1'785 similar samples on MalwareBazaar
TLSH T1916614A0624F8451D433A0096FF1B3DDB26971D1D646FA8FF10A8ADDDB739BE8480B94
Magika javascript
Reporter abuse_ch
Tags:js RemcosRAT

Intelligence


File Origin
# of uploads :
1
# of downloads :
103
Origin country :
SE SE
Vendor Threat Intelligence
Verdict:
Malicious
Score:
92.5%
Tags:
obfuscate xtreme spawn
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm base64 base64 fingerprint obfuscated obfuscated opendir overlay powershell repaired
Verdict:
Malicious
File Type:
js
First seen:
2025-11-15T00:16:00Z UTC
Last seen:
2025-11-17T10:20:00Z UTC
Hits:
~100
Detections:
Trojan.JS.SAgent.sb HEUR:Trojan.Script.Generic
Result
Threat name:
Detection:
malicious
Classification:
rans.troj.spyw.expl.evad
Score:
100 / 100
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to bypass UAC (CMSTPLUA)
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
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
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)
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 download and execute
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1814940 Sample: CopilotDrivers.js Startdate: 16/11/2025 Architecture: WINDOWS Score: 100 23 hostphpwindowsdriversappssapo.duckdns.org 2->23 25 systemcopilotdriver.ydns.eu 2->25 27 6 other IPs or domains 2->27 41 Suricata IDS alerts for network traffic 2->41 43 Found malware configuration 2->43 45 Malicious sample detected (through community Yara rule) 2->45 49 11 other signatures 2->49 8 wscript.exe 1 2->8         started        signatures3 47 Uses dynamic DNS services 23->47 process4 signatures5 51 Suspicious powershell command line found 8->51 53 Wscript starts Powershell (via cmd or directly) 8->53 55 Windows Scripting host queries suspicious COM object (likely to drop second stage) 8->55 57 2 other signatures 8->57 11 powershell.exe 14 15 8->11         started        process6 dnsIp7 29 ia601709.us.archive.org 207.241.227.99, 443, 49690 INTERNET-ARCHIVEUS United States 11->29 31 systemcopilotdriver.ydns.eu 181.206.158.190, 3001, 49692, 49696 ColombiaMovilCO Colombia 11->31 59 Writes to foreign memory regions 11->59 61 Injects a PE file into a foreign processes 11->61 63 Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent) 11->63 15 MSBuild.exe 4 2 11->15         started        19 conhost.exe 11->19         started        signatures8 process9 file10 21 C:\ProgramData\remcos\registros.dat, data 15->21 dropped 33 Contains functionality to bypass UAC (CMSTPLUA) 15->33 35 Detected Remcos RAT 15->35 37 Contains functionalty to change the wallpaper 15->37 39 5 other signatures 15->39 signatures11
Verdict:
inconclusive
YARA:
1 match(es)
Threat name:
Script-JS.Backdoor.Remcos
Status:
Suspicious
First seen:
2025-11-15 09:10:19 UTC
File Type:
Binary
AV detection:
9 of 24 (37.50%)
Threat level:
  5/5
Result
Malware family:
Score:
  10/10
Tags:
family:remcos discovery execution rat
Behaviour
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
Suspicious use of SetThreadContext
Badlisted process makes network request
Command and Scripting Interpreter: PowerShell
Process spawned unexpected child process
Remcos
Remcos family
Malware Config
C2 Extraction:
systemcopilotdriver.ydns.eu:3001
Dropper Extraction:
https://ia601709.us.archive.org/28/items/optimized_msi_20251112_1649/optimized_MSI.png
Please note that we are no longer able to provide a coverage score for Virus Total.

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 3a1cc2ad702cc9c16b1ecb0ddca2f00f8fd041bb246e36e7af4920a0ee025f4e

(this sample)

  
Delivery method
Distributed via web download

Comments