Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
2,132 detections
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Monitor for creation of suspicious files in the /spools/driver/ folder. This is a broad-based search that will surface any creation or modification of files in the folder targeted by this exploit. False Positives for legitimate driver activity (when that activity should be present) in this folder are possible
'This query looks for errors that may indicate that an attacker is attempting to exploit a vulnerability in the service.
Reference: https://www.microsoft.com/security/blog/2021/03/02/hafnium-targeting-exchange-servers/'
Reference: https://www.microsoft.com/security/blog/2021/03/02/hafnium-targeting-exchange-servers/'
The following queries pivot from an IP address assigned to a machine to the relevant machine or logged-on users.
To read more about it, check out this post: https://techcommunity.microsoft.com/t5/What-s-New/Advanced-hunting-now-includes-network-adapters-information/m-p/224402#M74.
Query #1: get machines that have used a given local IP address at a given time - as configured on their network adapters.
To read more about it, check out this post: https://techcommunity.microsoft.com/t5/What-s-New/Advanced-hunting-now-includes-network-adapters-information/m-p/224402#M74.
Query #1: get machines that have used a given local IP address at a given time - as configured on their network adapters.
This query was originally published in the threat analytics report, "Exchange Server zero-days exploited in the wild".
In early March 2021, Microsoft released patches for four different zero-day vulnerabilities affecting Microsoft Exchange Server. The vulnerabilities were being used in a coordinated attack. For more information on the vulnerabilities, visit the following links:
1. CVE-2021-26855
2. CVE-2021-26857
3. CVE-2021-26858
4. CVE-2021-27065
The following query finds evidence of an Exchange PowerShell snap-in being loaded. This can indicate an attempt to exfiltrate data.
More queries related to this threat can be found under the See also section of this page.
Reference - https://msrc-blog.microsoft.com/2021/03/02/multiple-security-updates-released-for-exchange-server/
In early March 2021, Microsoft released patches for four different zero-day vulnerabilities affecting Microsoft Exchange Server. The vulnerabilities were being used in a coordinated attack. For more information on the vulnerabilities, visit the following links:
1. CVE-2021-26855
2. CVE-2021-26857
3. CVE-2021-26858
4. CVE-2021-27065
The following query finds evidence of an Exchange PowerShell snap-in being loaded. This can indicate an attempt to exfiltrate data.
More queries related to this threat can be found under the See also section of this page.
Reference - https://msrc-blog.microsoft.com/2021/03/02/multiple-security-updates-released-for-exchange-server/
This query was originally published in the threat analytics report, "Exchange Server zero-days exploited in the wild".
In early March 2021, Microsoft released patches for four different zero-day vulnerabilities affecting Microsoft Exchange Server. The vulnerabilities were being used in a coordinated attack. For more information on the vulnerabilities, visit the following links:
1. CVE-2021-26855
2. CVE-2021-26857
3. CVE-2021-26858
4. CVE-2021-27065
The following query surfaces when unusual subprocesses were launched by MWorkerProcess, the Exchange Unified Messaging service. This might indicate exploitation of CVE-2021-26857 to run arbitrary code.
More queries related to this threat can be found under the See also section of this page.
Reference - https://msrc-blog.microsoft.com/2021/03/02/multiple-security-updates-released-for-exchange-server/
In early March 2021, Microsoft released patches for four different zero-day vulnerabilities affecting Microsoft Exchange Server. The vulnerabilities were being used in a coordinated attack. For more information on the vulnerabilities, visit the following links:
1. CVE-2021-26855
2. CVE-2021-26857
3. CVE-2021-26858
4. CVE-2021-27065
The following query surfaces when unusual subprocesses were launched by MWorkerProcess, the Exchange Unified Messaging service. This might indicate exploitation of CVE-2021-26857 to run arbitrary code.
More queries related to this threat can be found under the See also section of this page.
Reference - https://msrc-blog.microsoft.com/2021/03/02/multiple-security-updates-released-for-exchange-server/
'This query looks for new processes being spawned by the Exchange UM service where that process has not previously been observed before.
Reference: https://www.microsoft.com/security/blog/2021/03/02/hafnium-targeting-exchange-servers/'
Reference: https://www.microsoft.com/security/blog/2021/03/02/hafnium-targeting-exchange-servers/'
Detects potential command execution via webshell in SAP NetViewer through JSP files with 'cmd' or similar parameters. This rule is designed to identify exploitation of vulnerabilities like CVE-2025-31324, which allows remote code execution via a webshell by looking for specific URI patterns and query parameters indicative of command execution attempts, including common Linux commands and base64 encoded commands.
The analytic identifies potential exploitation attempts on a PaperCut NG server by analyzing its debug log data. It detects unauthorized or suspicious access attempts from public IP addresses and searches for specific URIs associated with known exploits. The detection leverages regex to parse unstructured log data, focusing on admin login activities. This activity is significant as it can indicate an active exploitation attempt on the server. If confirmed malicious, attackers could gain unauthorized access, potentially leading to data breaches or further compromise of the server.
Detects POST requests to the F5 BIG-IP iControl Rest API "bash" endpoint, which allows the execution of commands on the BIG-IP. This activity can indicate an attacker exploiting a public-facing application to gain initial access and execute arbitrary commands.
This analytic identifies outbound LDAP traffic to external IP addresses. It leverages network traffic data to detect connections on ports 389 (LDAP) or 636 (LDAPS) that are not directed to private IP ranges (RFC1918). This activity is significant because outbound LDAP traffic can indicate potential data exfiltration or unauthorized access attempts. If confirmed malicious, attackers could exploit this to access sensitive directory information, leading to data breaches or further network compromise. The rule specifically excludes traffic between internal source and destination IPs.
Detects potentially suspicious processes being spawned by a web server process which could be the result of a successfully placed web shell or exploitation. This rule specifically looks for common web server processes (Caddy, Apache HTTPD, Nginx, PHP, Tomcat, IIS, Exchange UMWorkerProcess) or Java processes identified as Tomcat, spawning anomaly children processes like command-line interpreters (cmd.exe, powershell.exe, bash.exe), network utilities (net.exe, netsh.exe), or other system utilities often used in post-exploitation.
Detects instances where an FTP service on an OpenCanary honeypot has had a login attempt. This indicates an adversary is attempting to access or interact with the honeypot's services, which could be part of reconnaissance, initial access, or lateral movement activities.
Detects exploitation attempts targeting Arcadyan routers, specifically looking for path traversal (CVE-2021-20090) and configuration file injection (CVE-2021-20091) vulnerabilities. The rule identifies requests containing '..%2f' (URL-encoded path traversal) and, for the configuration file injection, also 'apply_abstract.cgi', combined with requests to unauthenticated paths.
Detects potential exploitation of CVE-2021-26084, a Confluence RCE using OGNL injection. The rule looks for specific POST requests to Confluence endpoints, either '/pages/createpage-entervariables.action' with a 'SpaceKey=x' parameter or '/doenterpagevariables.action' with a 'u0027' string in the POST body's 'queryString' parameter. It specifically targets requests from 'anonymous' users that result in a 200 HTTP status code.
Detects instances where an FTP service on an OpenCanary node has had a login attempt.
This analytic detects exploitation activity of CVE-2023-27532 using Cisco Secure Firewall Intrusion Events. It leverages Cisco Secure Firewall Threat Defense IntrusionEvent logs to identify cases where Snort signature 61514 (Veeam Backup and Replication credential dump attempt) is followed within a 5-minute window by 64795 (Veeam Backup and Replication xp_cmdshell invocation attempt), which detects the use of `xp_cmdshell`, a common post-exploitation technique. If confirmed malicious, this behavior is highly indicative of a successful exploitation of CVE-2023-27532, followed by remote command execution or credential dumping.
Detects suspicious SQL query keywords that are often used during reconnaissance, data exfiltration, or destructive activities. This includes keywords like 'drop', 'truncate', 'dump', and 'select *', which can indicate attempts to manipulate database structures, extract sensitive information, or perform denial-of-service attacks.
Detects POST requests to the F5 BIG-IP iControl Rest API "bash" endpoint, which allows the execution of commands on the BIG-IP
Detects potentially suspicious processes being spawned by a web server process which could be the result of a successfully placed web shell or exploitation
Detects potential exploitation of a chained vulnerability attack targeting Ivanti EPMM 12.5.0.0. CVE-2025-4427 allows unauthenticated access to protected API endpoints via an authentication bypass, which can then be leveraged to trigger CVE-2025-4428 — a remote code execution vulnerability through template injection. This sequence enables unauthenticated remote code execution, significantly increasing the impact of exploitation.
Detects potential exploitation attempt of CVE-2023-1389, an Unauthenticated Command Injection vulnerability in TP-Link Archer AX21 routers. The rule looks for specific URI patterns and keywords indicative of an attempt to inject commands via the 'country' parameter.
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