MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 7b37e8bb233c33fbcf93a2edbe88653be60651ff55a965c694d990015e693399. 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: 8


Intelligence 8 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 7b37e8bb233c33fbcf93a2edbe88653be60651ff55a965c694d990015e693399
SHA3-384 hash: c86186933cd256339ad76bffd71c4c6b79225a518d705fcf3a2519e95b10125960b1f9e034d5654af2cc3f4ce01c56f6
SHA1 hash: 778b49fc0bde53db6896b4780537d16337c72b92
MD5 hash: 682a537698a99c18935286ac1aa8f1a3
humanhash: six-lithium-bakerloo-failed
File name:CopilotDrivers.js
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:425'636 bytes
First seen:2025-08-22 15:00:38 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 6144:Ha8CDtalBizq6AO+CVaa8CDtalBizq6AO+CVJla8CDtalBizq6AO+CVc:6Yl8G1OB1Yl8G1OB0Yl8G1OBa
TLSH T12694BF6E3551043664C334B82209A113F269C7D1CB5EF3A2F89CC51867A5C6AD2FBFA7
Magika txt
Reporter abuse_ch
Tags:js RemcosRAT systemcopilotdriver-ydns-eu

Intelligence

File Origin
# of uploads :
1
# of downloads :
85
Origin country :
SE SE
Vendor Threat Intelligence
Verdict:
Malicious
Score:
97.4%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68a886cee9d9dbcfd96d1807
Tags:
obfuscate xtreme spawn
Verdict:
Unknown
Threat level:
  10/10
Confidence:
100%
Link:
https://www.filescan.io/uploads/68a886a87137d684583808b0/reports/a43c082c-2ef1-4ee9-bae4-cd643b7908d4/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/7b37e8bb233c33fbcf93a2edbe88653be60651ff55a965c694d990015e693399
Verdict:
Malicious
File Type:
js
First seen:
2025-08-22T13:30:00Z UTC
Last seen:
2025-08-22T13:30:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/7b37e8bb233c33fbcf93a2edbe88653be60651ff55a965c694d990015e693399/results?tab=lookup
Result
Threat name:
n/a
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1763042
Signature
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
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
Uses dynamic DNS services
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
Score:
98%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/7b37e8bb233c33fbcf93a2edbe88653be60651ff55a965c694d990015e693399
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/7b37e8bb233c33fbcf93a2edbe88653be60651ff55a965c694d990015e693399/
Threat name:
Script-JS.Trojan.PureLogsStealer
Create hunting rule
Status:
Malicious
First seen:
2025-08-22 11:20:42 UTC
File Type:
Text
AV detection:
9 of 24 (37.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=pm36rozdhqz7xt4tulw35cdfhptamup7kwuwlruu3giacxtjgomq._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos defense_evasion discovery execution rat trojan
Link:
https://tria.ge/reports/250822-sez1lsvwe1/
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
Blocklisted process makes network request
Command and Scripting Interpreter: PowerShell
Modifies trusted root certificate store through registry
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.

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 7b37e8bb233c33fbcf93a2edbe88653be60651ff55a965c694d990015e693399

(this sample)

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

Comments