MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 e3a290ca9a4ad9f42f70f16e6fbb74ad9c2699c308ff78bb78b85333c86996e8. 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: 11


Intelligence 11 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: e3a290ca9a4ad9f42f70f16e6fbb74ad9c2699c308ff78bb78b85333c86996e8
SHA3-384 hash: 7c5a567669aa6fb2d1a28f91f682b1698064832f0a28286326e968a2c23b293984ff0d6b4794aad63f85fabd63151f93
SHA1 hash: 35524f050db003bbd84d949677e6ece01f1c665f
MD5 hash: 670f1db7fbb05f0af36ed8bf492305e8
humanhash: undress-sodium-steak-magazine
File name:CopilotDrivers.js
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:396'470 bytes
First seen:2025-10-15 11:28:07 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 3072:d8JphIUdsJxBifciFbQdb+wZtgh2XH8JphIUdsJxBifciFbQdb+wZtgh2XS8JphU:OIUwBiUmL2YIUwBiUmL2jIUwBiUmL2N
TLSH T119842E50F0EE3155E952E557DF58EBFCF03A407A75862131D8B86BA8D2300EB8F62963
Magika txt
Reporter abuse_ch
Tags:js RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
86
Origin country :
SE SE
Vendor Threat Intelligence
Detection(s):
no reply from clamd
Create hunting rule

Verdict:
Malicious
Score:
91.7%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68ef856897a16d00a8da2fd9
Tags:
obfuscate xtreme spawn
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm base64 evasive fingerprint obfuscated powershell
Link:
https://www.filescan.io/uploads/68ef864d057c46a471cd22f9/reports/3d2dbf13-b9ff-4c15-8ea4-adbacfce31bb/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/e3a290ca9a4ad9f42f70f16e6fbb74ad9c2699c308ff78bb78b85333c86996e8
Verdict:
Malicious
File Type:
js
First seen:
2025-10-14T14:23:00Z UTC
Last seen:
2025-10-14T14:54:00Z UTC
Hits:
~10
Detections:
Trojan.JS.SAgent.sb HEUR:Trojan.Script.Generic
Link:
https://opentip.kaspersky.com/e3a290ca9a4ad9f42f70f16e6fbb74ad9c2699c308ff78bb78b85333c86996e8/results?tab=lookup
Result
Threat name:
n/a
Detection:
malicious
Classification:
expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1795677
Signature
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Creates processes via WMI
Found Tor onion address
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
Queries sensitive disk information (via WMI, Win32_DiskDrive, often done to detect virtual machines)
Queries sensitive Plug and Play Device Information (via WMI, Win32_PnPEntity, often done to detect virtual machines)
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: WScript or CScript Dropper
Suspicious execution chain found
Suspicious powershell command line found
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Wscript starts Powershell (via cmd or directly)
Yara detected Powershell download and execute
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1795677 Sample: CopilotDrivers.js Startdate: 15/10/2025 Architecture: WINDOWS Score: 100 20 dn721604.ca.archive.org 2->20 22 archive.org 2->22 30 Malicious sample detected (through community Yara rule) 2->30 32 Multi AV Scanner detection for submitted file 2->32 34 Yara detected Powershell download and execute 2->34 36 5 other signatures 2->36 8 wscript.exe 1 2->8         started        11 svchost.exe 1 1 2->11         started        signatures3 process4 dnsIp5 38 Suspicious powershell command line found 8->38 40 Wscript starts Powershell (via cmd or directly) 8->40 42 Windows Scripting host queries suspicious COM object (likely to drop second stage) 8->42 44 2 other signatures 8->44 14 powershell.exe 14 15 8->14         started        24 127.0.0.1 unknown unknown 11->24 signatures6 process7 dnsIp8 26 archive.org 207.241.224.2, 443, 49681 INTERNET-ARCHIVEUS United States 14->26 28 dn721604.ca.archive.org 204.62.247.23, 443, 49682 COGENT-174US United States 14->28 46 Queries sensitive disk information (via WMI, Win32_DiskDrive, often done to detect virtual machines) 14->46 48 Found Tor onion address 14->48 50 Queries sensitive Plug and Play Device Information (via WMI, Win32_PnPEntity, often done to detect virtual machines) 14->50 52 Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent) 14->52 18 conhost.exe 14->18         started        signatures9 process10
Score:
29%
Verdict:
Benign
File Type:
SCRIPT
Link:
https://malprob.io/report/e3a290ca9a4ad9f42f70f16e6fbb74ad9c2699c308ff78bb78b85333c86996e8
Verdict:
inconclusive
YARA:
2 match(es)
Tags:
PowerShell
Link:
https://app.malva.re/file/670f1db7fbb05f0af36ed8bf492305e8
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/e3a290ca9a4ad9f42f70f16e6fbb74ad9c2699c308ff78bb78b85333c86996e8/
Verdict:
Malicious
Threat:
Trojan.JS.SAgent
Link:
https://tip.neiki.dev/file/e3a290ca9a4ad9f42f70f16e6fbb74ad9c2699c308ff78bb78b85333c86996e8
Threat name:
Script-JS.Backdoor.Remcos
Create hunting rule
Status:
Suspicious
First seen:
2025-10-15 10:45:22 UTC
File Type:
Text (JavaScript)
AV detection:
12 of 38 (31.58%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=4orjbsu2jlm7il3q6fxg7o3uvwocngodbd7xro3yxbjthsdjs3ua._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos discovery execution rat
Link:
https://tria.ge/reports/251015-nm4ljsbp41/
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://archive.org/download/optimized_msi_20251013_1235/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/e3a290ca9a4ad9f42f70f16e6fbb74ad9c2699c308ff78bb78b85333c86996e8

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 e3a290ca9a4ad9f42f70f16e6fbb74ad9c2699c308ff78bb78b85333c86996e8

(this sample)

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

Comments