MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5b8258f1483c13d399f91fe6b71b364f8d941b0030aa5e4b6f5c4aa29fa74667. 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 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 5b8258f1483c13d399f91fe6b71b364f8d941b0030aa5e4b6f5c4aa29fa74667
SHA3-384 hash: 7c7664bfcfef62a55517ab88d294ac83757a841f767fd0fe38316cc5a09da7a042aea7ff7c4c102566e4e861e153205d
SHA1 hash: 2b502cadbdfe41445ad72a7ed00648a2f79eb731
MD5 hash: e595a6b09dbca80388b1de23dce20b6c
humanhash: shade-four-mississippi-seven
File name:CopilotDrivers.js
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:4'693'696 bytes
First seen:2025-10-23 06:02:52 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 49152:ekOkFE10Gz/+qI7hXZ3uthclYDH1Krqo3:j
TLSH T16E2612A0292E88A4936DC2C52F99BD927F8E80DF490D7794745816CC577BC7A40BCF3A
Magika javascript
Reporter abuse_ch
Tags:js RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
111
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=68f9c54d3edd081eba40fb74
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/68f9c5e0acdc0d13837e9f58/reports/d1640531-c00d-4160-9493-b283aea3f181/overview
Verdict:
Malicious
Labled as:
Trojan.Cryxos.JS
Link:
https://www.hybrid-analysis.com/sample/5b8258f1483c13d399f91fe6b71b364f8d941b0030aa5e4b6f5c4aa29fa74667
Verdict:
Malicious
File Type:
js
First seen:
2025-10-22T16:19:00Z UTC
Last seen:
2025-10-22T16:39:00Z UTC
Hits:
~10
Detections:
Trojan.JS.SAgent.sb HEUR:Trojan.Script.Generic
Link:
https://opentip.kaspersky.com/5b8258f1483c13d399f91fe6b71b364f8d941b0030aa5e4b6f5c4aa29fa74667/results?tab=lookup
Result
Threat name:
n/a
Detection:
malicious
Classification:
expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1800330
Signature
Creates processes via WMI
Found suspicious powershell code related to unpacking or dynamic code loading
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
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
Score:
13%
Verdict:
Benign
File Type:
SCRIPT
Link:
https://malprob.io/report/5b8258f1483c13d399f91fe6b71b364f8d941b0030aa5e4b6f5c4aa29fa74667
Verdict:
inconclusive
YARA:
2 match(es)
Tags:
PowerShell
Link:
https://app.malva.re/file/e595a6b09dbca80388b1de23dce20b6c
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/5b8258f1483c13d399f91fe6b71b364f8d941b0030aa5e4b6f5c4aa29fa74667/
Verdict:
Malicious
Threat:
Trojan.JS.SAgent
Link:
https://tip.neiki.dev/file/5b8258f1483c13d399f91fe6b71b364f8d941b0030aa5e4b6f5c4aa29fa74667
Threat name:
Script-JS.Trojan.Cryxos
Create hunting rule
Status:
Malicious
First seen:
2025-10-23 06:07:43 UTC
File Type:
Binary
AV detection:
5 of 24 (20.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=lobfr4kihqj5hgpzd7tlogzwj6gzigyagcvf4s3plrfkfh5hiztq._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos discovery execution rat
Link:
https://tria.ge/reports/251023-gtzslsfx8d/
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:
http://archive.org/download/optimized_msi_20251021_2144/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/5b8258f1483c13d399f91fe6b71b364f8d941b0030aa5e4b6f5c4aa29fa74667

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 5b8258f1483c13d399f91fe6b71b364f8d941b0030aa5e4b6f5c4aa29fa74667

(this sample)

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

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