MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b3c254d8249b079be915664ed97ac1423aeb9c2845a8521a2d1a31ff0fd66476. 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: b3c254d8249b079be915664ed97ac1423aeb9c2845a8521a2d1a31ff0fd66476
SHA3-384 hash: fbcd326a5cb41121ae2ee00a99e61e2006a3a7b7f2c00610384d9dc75bafd882ab0b065edc13c5df088e2a81b6ec1493
SHA1 hash: 723a566c99d7e380253af6f6e1b4bcbf435484c3
MD5 hash: 7677a05a856094fbe5a107921b8919b3
humanhash: thirteen-white-saturn-delta
File name:Update.vbs
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'970'436 bytes
First seen:2025-08-22 14:58:00 UTC
Last seen:Never
File type:Visual Basic Script (vbs) vbs
MIME type:text/plain
ssdeep 24576:uY54P3Ow7tY54P3Ow7tY54P3Ow79Y54P3Ow7tY54P3Ow74:uFW4FW4FWEFW4FW5
Threatray 1'346 similar samples on MalwareBazaar
TLSH T11F95E1CB794D9684888271F96538C622F1DD83E07316D7B2EE78C614B3838B8D57BB91
Magika vba
Reporter abuse_ch
Tags:MSI-STEGO RemcosRAT vbs

Intelligence

File Origin
# of uploads :
1
# of downloads :
54
Origin country :
SE SE
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/22980/
Verdict:
Malicious
Score:
91.7%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68a885ed6eed937d746d1632
Tags:
obfuscate xtreme spawn
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Link:
https://www.filescan.io/uploads/68a886047137d68458380799/reports/60ffc6dc-cae5-4d41-85e5-261a28bb1c6e/overview
Verdict:
Malicious
Labled as:
GT:VB.Honolulu.1
Link:
https://www.hybrid-analysis.com/sample/b3c254d8249b079be915664ed97ac1423aeb9c2845a8521a2d1a31ff0fd66476
Verdict:
Malicious
File Type:
vbs
First seen:
2025-08-22T15:25:00Z UTC
Last seen:
2025-08-22T15:25:00Z UTC
Hits:
~100
Link:
https://opentip.kaspersky.com/b3c254d8249b079be915664ed97ac1423aeb9c2845a8521a2d1a31ff0fd66476/results?tab=lookup
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1763053
Signature
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
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: Remcos
Sigma detected: Script Interpreter Execution From Suspicious Folder
Sigma detected: Suspicious Script Execution From Temp Folder
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
Uses known network protocols on non-standard ports
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 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: 1763053 Sample: Update.vbs Startdate: 22/08/2025 Architecture: WINDOWS Score: 100 31 pasar09enero.duckdns.org 2->31 33 ssot.duckdns.org 2->33 35 3 other IPs or domains 2->35 59 Suricata IDS alerts for network traffic 2->59 61 Found malware configuration 2->61 63 Malicious sample detected (through community Yara rule) 2->63 67 13 other signatures 2->67 9 wscript.exe 2->9         started        signatures3 65 Uses dynamic DNS services 33->65 process4 signatures5 69 Suspicious powershell command line found 9->69 71 Wscript starts Powershell (via cmd or directly) 9->71 73 Windows Scripting host queries suspicious COM object (likely to drop second stage) 9->73 75 2 other signatures 9->75 12 powershell.exe 14 15 9->12         started        process6 dnsIp7 41 ssot.duckdns.org 188.126.90.15, 49723, 8011 PORTLANEwwwportlanecomSE Sweden 12->41 43 archive.org 207.241.224.2, 443, 49718 INTERNET-ARCHIVEUS United States 12->43 45 ia801009.us.archive.org 207.241.228.89, 443, 49719 INTERNET-ARCHIVEUS United States 12->45 77 Found Tor onion address 12->77 79 Writes to foreign memory regions 12->79 81 Suspicious execution chain found 12->81 83 Injects a PE file into a foreign processes 12->83 16 RegAsm.exe 12->16         started        19 RegAsm.exe 7 18 12->19         started        23 conhost.exe 12->23         started        signatures8 process9 dnsIp10 47 Contains functionality to bypass UAC (CMSTPLUA) 16->47 49 Contains functionalty to change the wallpaper 16->49 51 Contains functionality to steal Chrome passwords or cookies 16->51 57 2 other signatures 16->57 37 pasar09enero.duckdns.org 181.206.158.190, 3000, 49724, 49726 ColombiaMovilCO Colombia 19->37 39 geoplugin.net 178.237.33.50, 49725, 80 ATOM86-ASATOM86NL Netherlands 19->39 27 C:\Users\user\AppData\...\hyharibtxouvz.vbs, data 19->27 dropped 29 C:\ProgramData\remcos\registros.dat, data 19->29 dropped 53 Detected Remcos RAT 19->53 55 Installs a global keyboard hook 19->55 25 wscript.exe 19->25         started        file11 signatures12 process13
Score:
95%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/b3c254d8249b079be915664ed97ac1423aeb9c2845a8521a2d1a31ff0fd66476
Verdict:
Malware
YARA:
1 match(es)
Tags:
Batch Command DeObfuscated PowerShell PowerShell Call Scripting.FileSystemObject SMTPControl.SMTP VBScript
Link:
https://app.malva.re/file/7677a05a856094fbe5a107921b8919b3
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b3c254d8249b079be915664ed97ac1423aeb9c2845a8521a2d1a31ff0fd66476/
Threat name:
Script-WScript.Trojan.Honolulu
Create hunting rule
Status:
Malicious
First seen:
2025-08-22 13:01:52 UTC
File Type:
Text (VBS)
AV detection:
8 of 24 (33.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wpbfjwbetmdzx2ivmzhns6wbii5oxhbiiwufegrndiy76d6wmr3a._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
023c2ffe7b6418affcafe78df6d190107a882de63f55c63a266247c22b11e244
RemcosRAT
0780b511b4413c846adda72e7ede6afb0398a084112bf0399d2d4041f952cfa4
RemcosRAT
36f0e0b31d5b901268c65a2d5dd8b48a0e9c9b00a329c10be9a7be625fe5d84d
RemcosRAT
5728fe1fbdd76d4b0ddb5e3cacb1aab8ccdaa03e6b53d497255eb24926f0ea67
RemcosRAT
6bc677ac4c36cb99e3170edb2b29b8e8b47399a2896f8f0c6fa998b4337bcf35
RemcosRAT
c208d8d0493c60f14172acb4549dcb394d2b92d30bcae4880e66df3c3a7100e4
RemcosRAT
d58ef7f6352296a5f9052e5bb522a0556037f373b27dd1bf4c53a521f0f7a0a8
RemcosRAT
e119c6c5485307075a1e5d0950a77f978f7f17e23c315ed8c38cc1259b8af26f
RemcosRAT
error
RemcosRAT
+ 1'336 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos defense_evasion discovery execution rat
Link:
https://tria.ge/reports/250822-sddqzsvwdw/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
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
Malware Config
C2 Extraction:
pasar09enero.duckdns.org:3000
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.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/b3c254d8249b079be915664ed97ac1423aeb9c2845a8521a2d1a31ff0fd66476

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

Visual Basic Script (vbs) vbs b3c254d8249b079be915664ed97ac1423aeb9c2845a8521a2d1a31ff0fd66476

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3560099/
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3420607/
Cape
Cape
https://www.capesandbox.com/analysis/22980/

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