MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b2b7969521f4513a7a34965cbacac4cd7fa3a1ac58b832676af3f6dcab73da47. 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: 10


Intelligence 10 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b2b7969521f4513a7a34965cbacac4cd7fa3a1ac58b832676af3f6dcab73da47
SHA3-384 hash: 846963a42202b78be3b6d7ae3afd5cd9d7554cdeebc19fd45adfbd74317a188abde9afe9e36cff5b58fe4ffdae6ef57d
SHA1 hash: b044a353b1e627d242966eb4f4f309bde1340a8f
MD5 hash: bc21aa1917e086be1c85aaba443922df
humanhash: red-yellow-indigo-winner
File name:CopilotDrivers.js
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:4'510'143 bytes
First seen:2025-10-22 12:55:27 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 768:kpNXa/tGIkb4drfAjjMdbpVn8RV+U9rv7IAqMAG89mPfTWpeFnI7LIbpuE24nbr1:ItaIb0Lq+UVvkErWpeBbpuEdki
TLSH T1C72621414ABFDE1805104D98BE8554E8FB3A784F0B1B506E7844F8E8D793E17EA98B7C
Magika javascript
Reporter abuse_ch
Tags:js RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
99
Origin country :
SE SE
Vendor Threat Intelligence
Detection(s):
Sanesecurity.Malware.27200.JsHeur.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.JS.Downloader-24.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.JS.Downloader-23.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
94.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68f8d494ad6ce0f5ad40a7a1
Tags:
obfuscate xtreme spawn
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm base64 evasive fingerprint obfuscated obfuscated overlay powershell
Link:
https://www.filescan.io/uploads/68f8d4a611ff3db29f663939/reports/64d32e4d-ac8c-416d-96c7-da059e16d161/overview
Verdict:
Malicious
Labled as:
Trojan.Cryxos.JS
Link:
https://www.hybrid-analysis.com/sample/b2b7969521f4513a7a34965cbacac4cd7fa3a1ac58b832676af3f6dcab73da47
Verdict:
Malicious
File Type:
js
First seen:
2025-10-21T15:32:00Z UTC
Last seen:
2025-10-23T10:08:00Z UTC
Hits:
~10
Detections:
Trojan.JS.SAgent.sb HEUR:Trojan.Script.Generic
Link:
https://opentip.kaspersky.com/b2b7969521f4513a7a34965cbacac4cd7fa3a1ac58b832676af3f6dcab73da47/results?tab=lookup
Result
Threat name:
n/a
Detection:
malicious
Classification:
expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1799809
Signature
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Creates processes via WMI
Found Tor onion address
JavaScript file contains suspicious strings
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
Verdict:
inconclusive
YARA:
2 match(es)
Tags:
PowerShell
Link:
https://app.malva.re/file/bc21aa1917e086be1c85aaba443922df
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b2b7969521f4513a7a34965cbacac4cd7fa3a1ac58b832676af3f6dcab73da47/
Verdict:
Malicious
Threat:
Trojan.JS.SAgent
Link:
https://tip.neiki.dev/file/b2b7969521f4513a7a34965cbacac4cd7fa3a1ac58b832676af3f6dcab73da47
Threat name:
Script-JS.Trojan.Cryxos
Create hunting rule
Status:
Malicious
First seen:
2025-10-22 10:13:48 UTC
File Type:
Binary
AV detection:
6 of 24 (25.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wk3znfjb6ritu6ruszolvswezv72hinmlc4dez3k6p3nzk3t3jdq._file
Result
Malware family:
n/a
Score:
  10/10
Tags:
execution
Link:
https://tria.ge/reports/251022-p6wkqady6d/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Command and Scripting Interpreter: JavaScript
Badlisted process makes network request
Command and Scripting Interpreter: PowerShell
Process spawned unexpected child process
Malware Config
Dropper Extraction:
http://archive.org/download/optimized_msi_20251021_1350/optimized_MSI.png
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/b2b7969521f4513a7a34965cbacac4cd7fa3a1ac58b832676af3f6dcab73da47

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 b2b7969521f4513a7a34965cbacac4cd7fa3a1ac58b832676af3f6dcab73da47

(this sample)

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

Comments