CSS-Exchange
exchange_webshell_detection
CSS-Exchange | exchange_webshell_detection | |
---|---|---|
98 | 8 | |
1,195 | 83 | |
0.3% | - | |
0.0 | 4.4 | |
2 days ago | about 3 years ago | |
PowerShell | PowerShell | |
MIT License | - |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
CSS-Exchange
- Has anyone ran the CVE-2023-23397 script against a large environment?
-
CVE-2023-23397
The MaxServicePointIdleTime property I changed because of what I saw suggested here: https://github.com/microsoft/CSS-Exchange/issues/1581.
-
CVE-2023-23397 - Critical Elevation of Privilege zero-day in Microsoft Outlook, severity 9.8
This is actively exploited, patch immediately. Microsoft also provided a script that checks Exchange items for malicious messaging items: https://github.com/microsoft/CSS-Exchange/blob/a4c096e8b6e6eddeba2f42910f165681ed64adf7/docs/Security/CVE-2023-23397.md
-
// SITUATIONAL AWARENESS // Hunting Microsoft Word NTLM Relay Vulnerability CVE-2023-23397
Microsoft has released a PowerShell script that can be run on Exchange infrastructure to scan email files for malicious UNC paths, however, patching is the preferred mitigation strategy.
-
Exchange 0day exploit in wild
I would expect that installing the URL Rewrite 2 module shouldn't cause any problems -- E2013 as such doesn't care about it. In fact, Microsoft's own EOMT script for the Hafnium mitigations suggests installing it. It'll likely require a reboot, though, or at the very least an IIS restart.
-
Health checker reports unsigned IIS modules (Exchange 2013 CU23)
Yep, the August security update and OS updates were installed on all four nodes. But the order in which they were installed may have been different... I don't recall. Someone just posted above that this is a known problem with Windows 2012/R2: https://github.com/microsoft/CSS-Exchange/pull/1166
- Critical privileged elevation patch incoming next week.
- Exchange Admin?
-
May 2022 Security Update - detection
Which is the latest I can find on Github. This server is running Exchange 2019 CU 11. It has the March updates (KB5012698), but not the May one (KB5014261). You can also verify from the build number it's not up to date. There are no vulnerabilities reported and the only thing in "red" is that TCP keepalive warning.
-
Exchange 2019 still requires obsolete UCM4 installation
https://github.com/microsoft/CSS-Exchange/issues/535 Even the maintainer David Paulson of the ExchangeHealtcheck script opened an issue on this matter, only waiting on feedback of the Exchange Team.
exchange_webshell_detection
- CERT Latvia False Positive on their Detect Webshells Script
- CERT Latvia False Positiver on their Detect Webshells Script
- Windows defender quarantined Microsoft Exchange exploit attempt immediately & reset virtual oab directory. Am i still compromised?
- cert-lv/exchange_webshell_detection - Detect webshells dropped on Microsoft Exchange servers exploited through "proxylogon" group of vulnerabilites (CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, CVE-2021-27065)
-
HAFNIUM - Edited Files and File Left behind and other inquiries
Here's a script I found on bleepingcomputer that searches for several files. https://github.com/cert-lv/exchange_webshell_detection
- Detect webshells dropped on Microsoft Exchange servers exploited through "proxylogon" group of vulnerabilites (CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, CVE-2021-27065)
-
At Least 30k U.S. Organizations Newly Hacked via Holes in MS’s Email Software
There's a powershell script to check your server here: https://github.com/cert-lv/exchange_webshell_detection
What are some alternatives?
HealthChecker - Exchange Server Performance Health Checker Script
PowerZure - PowerShell framework to assess Azure security
New-KrbtgtKeys.ps1 - This script will enable you to reset the krbtgt account password and related keys while minimizing the likelihood of Kerberos authentication issues being caused by the operation.
Cyber-Defence - Information released publicly by NCC Group's Cyber Incident Response Team
GadgetToJScript - A tool for generating .NET serialized gadgets that can trigger .NET assembly load/execution when deserialized using BinaryFormatter from JS/VBS/VBA based scripts.
Get-ExchangeEnvironmentReport - This script creates an HTML report showing the following information about an Exchange 2019, 2016, 2013, 2010, and, to a lesser extent, 2007 and 2003 environment.
Metasploit - Metasploit Framework
Encrypt-Delete-Test - Really can protect from ransomware encryption?
badExchangePews
scanning
IISBackdoorDetect - Detects IIS modules such as IIS-RAID