MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f7c88eb25216b886d7f675ae5c763670ce40fecdc07b6dbeab4d4749995389e8. 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 20 File information Comments
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SHA256 hash: f7c88eb25216b886d7f675ae5c763670ce40fecdc07b6dbeab4d4749995389e8
SHA3-384 hash: 1256fcb1dc3ae1a2d9cfb4eb4806414a831e2ba6e96c5f040e00a6c23239aac07e55aacd22f321e49edfc877a8b79db2
SHA1 hash: 97382550d9d88ffd433789b4b9b89fdb16bd689a
MD5 hash: 2bb16ef0192d98ab08d5cdb2d4a2d04f
humanhash: lima-music-stream-fifteen
File name:CopilotDrivers.js
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:6'356'224 bytes
First seen:2025-11-08 07:46:11 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 3072:GpDqCdk+h5ZjegTkTIj/UzGohnyGGGM5N:G
TLSH T10A56128B721C85DC5BAB62026AA44178FD10303F9B93103E3419E5C7EBFD57EC1E65AA
Magika javascript
Reporter abuse_ch
Tags:js RAT RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
105
Origin country :
SE SE
Vendor Threat Intelligence
Verdict:
Malicious
Score:
97.4%
Link:
https://cyber-fortress.com/docs/result/index.php?id=690ef54a3afb53888cc99ec8
Tags:
ransomware obfuscate xtreme
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm base64 base64 fingerprint obfuscated obfuscated overlay powershell repaired
Link:
https://www.filescan.io/uploads/690ef548ab766f7a98a5e2ac/reports/c14efff2-4727-4beb-a0ea-384352ceb14f/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/f7c88eb25216b886d7f675ae5c763670ce40fecdc07b6dbeab4d4749995389e8
Verdict:
Malicious
File Type:
js
First seen:
2025-11-08T00:13:00Z UTC
Last seen:
2025-11-09T06:45:00Z UTC
Hits:
~10
Detections:
Trojan.JS.SAgent.sb HEUR:Trojan.Script.SAgent.gen
Link:
https://opentip.kaspersky.com/f7c88eb25216b886d7f675ae5c763670ce40fecdc07b6dbeab4d4749995389e8/results?tab=lookup
Result
Threat name:
Remcos, Caminho Loader
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1810385
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to bypass UAC (CMSTPLUA)
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
Found Tor onion address
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
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 Caminho Loader
Yara detected Powershell download and execute
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1810385 Sample: CopilotDrivers.js Startdate: 08/11/2025 Architecture: WINDOWS Score: 100 30 sitioseguroswpersonasapp.duckdns.org 2->30 32 systemcopilotdriver.ydns.eu 2->32 34 3 other IPs or domains 2->34 56 Suricata IDS alerts for network traffic 2->56 58 Found malware configuration 2->58 60 Malicious sample detected (through community Yara rule) 2->60 64 14 other signatures 2->64 8 wscript.exe 1 2->8         started        11 svchost.exe 1 1 2->11         started        signatures3 62 Uses dynamic DNS services 30->62 process4 dnsIp5 66 Suspicious powershell command line found 8->66 68 Wscript starts Powershell (via cmd or directly) 8->68 70 Windows Scripting host queries suspicious COM object (likely to drop second stage) 8->70 72 2 other signatures 8->72 14 powershell.exe 14 15 8->14         started        36 127.0.0.1 unknown unknown 11->36 signatures6 process7 dnsIp8 38 systemcopilotdriver.ydns.eu 181.206.158.190, 3001, 49684, 49687 ColombiaMovilCO Colombia 14->38 40 archive.org 207.241.224.2, 49681, 80 INTERNET-ARCHIVEUS United States 14->40 42 ia600202.us.archive.org 207.241.227.222, 49682, 80 INTERNET-ARCHIVEUS United States 14->42 74 Found Tor onion address 14->74 76 Writes to foreign memory regions 14->76 78 Injects a PE file into a foreign processes 14->78 18 MSBuild.exe 14->18         started        21 MSBuild.exe 4 2 14->21         started        24 conhost.exe 14->24         started        26 MSBuild.exe 14->26         started        signatures9 process10 file11 44 Contains functionality to bypass UAC (CMSTPLUA) 18->44 46 Contains functionalty to change the wallpaper 18->46 48 Contains functionality to steal Chrome passwords or cookies 18->48 54 2 other signatures 18->54 28 C:\ProgramData\remcos\registros.dat, data 21->28 dropped 50 Detected Remcos RAT 21->50 52 Installs a global keyboard hook 21->52 signatures12
Gathering data
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/f7c88eb25216b886d7f675ae5c763670ce40fecdc07b6dbeab4d4749995389e8/
Verdict:
Malicious
Threat:
Family.REMCOS
Link:
https://tip.neiki.dev/file/f7c88eb25216b886d7f675ae5c763670ce40fecdc07b6dbeab4d4749995389e8
Threat name:
Script-JS.Backdoor.Remcos
Create hunting rule
Status:
Suspicious
First seen:
2025-11-08 04:44:30 UTC
File Type:
Binary
AV detection:
7 of 24 (29.17%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=67ei5mssc24inv7wowxfy5rwodheb7wnyb5w3pvljvdutgktrhua._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:phantomvai family:remcos discovery execution loader rat
Link:
https://tria.ge/reports/251108-jl3weawkaj/
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
Detects PhantomVAI loader aka VMDetectLoader, CaminhoLoader
PhantomVAI, VMDetectLoader, CaminhoLoader
Phantomvai family
Process spawned unexpected child process
Remcos
Remcos family
Malware Config
C2 Extraction:
systemcopilotdriver.ydns.eu:3001
Dropper Extraction:
http://archive.org/download/optimized_msi_20251104/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/f7c88eb25216b886d7f675ae5c763670ce40fecdc07b6dbeab4d4749995389e8

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:cobalt_strike_tmp01925d3f
Create hunting rule
Author:The DFIR Report
Description:files - file ~tmp01925d3f.exe
Reference:https://thedfirreport.com
Rule name:CP_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:Disable_Defender
Create hunting rule
Author:iam-py-test
Description:Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen
Rule name:FreddyBearDropper
Create hunting rule
Author:Dwarozh Hoshiar
Description:Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
Create hunting rule
Author:ditekSHen
Description:Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:Remcos_unpacked_PulseIntel
Create hunting rule
Author:PulseIntel
Description:Remcos Payload
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)
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Windows_Trojan_Remcos_b296e965
Create hunting rule
Author:Elastic Security
Reference:https://www.elastic.co/security-labs/exploring-the-ref2731-intrusion-set
Rule name:win_remcos_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.remcos.
Rule name:win_remcos_rat_unpacked
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:win_remcos_w0
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:yarahub_win_remcos_rat_unpacked_aug_2023
Create hunting rule
Author:Matthew @ Embee_Research

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 f7c88eb25216b886d7f675ae5c763670ce40fecdc07b6dbeab4d4749995389e8

(this sample)

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

Comments