Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This query was originally published on Twitter, by @MsftSecIntel.
The query helps detect emails associated with a campaign that has used open redirector URLs. The campaign's URLs begin with the distinct pattern, hxxps://t. Attackers use URL redirection to manipulate users into visiting a malicious website or to evade detection.
Reference - https://twitter.com/MsftSecIntel
The query helps detect emails associated with a campaign that has used open redirector URLs. The campaign's URLs begin with the distinct pattern, hxxps://t. Attackers use URL redirection to manipulate users into visiting a malicious website or to evade detection.
Reference - https://twitter.com/MsftSecIntel
Detects executable names or flags used by Htran or Htran-like tools (e.g. NATBypass)
Detects the use of Fast Reverse Proxy. frp is a fast reverse proxy to help you expose a local server behind a NAT or firewall to the Internet.
Detects an executable initiating a network connection to "LocaltoNet" tunneling sub-domains.
LocaltoNet is a reverse proxy that enables localhost services to be exposed to the Internet.
Attackers have been seen to use this service for command-and-control activities to bypass MFA and perimeter controls.
LocaltoNet is a reverse proxy that enables localhost services to be exposed to the Internet.
Attackers have been seen to use this service for command-and-control activities to bypass MFA and perimeter controls.
Detects the use of NPS, a port forwarding and intranet penetration proxy server
Detects the use of Fast Reverse Proxy. frp is a fast reverse proxy to help you expose a local server behind a NAT or firewall to the Internet.
Detects execution of the "cloudflared" tool with the tunnel "cleanup" flag in order to cleanup tunnel connections.
'This hunting query will identify instances where a single user account has seen a high incidence of failed attempts from highly volatile IP addresses
Changing IP address for every password attempt is becoming a more common technique amongst sophisticated threat groups. Often threat groups will randomise
the user agent they are using as well as IP address. This technique has been enabled by the emergence of services providing huge numbers of residential IP
addresses. These services are often enabled through malicious browser plugins. This query is best executed over longer timeframes.
Reduce the timeRange if you have too much data. Results with the highest "IPs", "Failures" and "DaysWithAttempts" are good candidates for further
investigation. This query intentionally does not cluster on UserAgent, IP etc. This query is clustering on the highly volatile IP behaviour.'
Changing IP address for every password attempt is becoming a more common technique amongst sophisticated threat groups. Often threat groups will randomise
the user agent they are using as well as IP address. This technique has been enabled by the emergence of services providing huge numbers of residential IP
addresses. These services are often enabled through malicious browser plugins. This query is best executed over longer timeframes.
Reduce the timeRange if you have too much data. Results with the highest "IPs", "Failures" and "DaysWithAttempts" are good candidates for further
investigation. This query intentionally does not cluster on UserAgent, IP etc. This query is clustering on the highly volatile IP behaviour.'
'Detects request to potentially harmful file types (.ps1, .bat, .vbs, etc.).'
This query identifies when a user clicks a link that opens a browser to navigate to a URL
which uses redirection. It then filters out any redirections to URLs in the same DNS namespace
as the originating URL. Redirection identification is done based on URL query parameters
outlined in the following article: https://www.bleepingcomputer.com/news/security/snapchat-amex-sites-abused-in-microsoft-365-phishing-attacks/
which uses redirection. It then filters out any redirections to URLs in the same DNS namespace
as the originating URL. Redirection identification is done based on URL query parameters
outlined in the following article: https://www.bleepingcomputer.com/news/security/snapchat-amex-sites-abused-in-microsoft-365-phishing-attacks/
Detects the execution of netsh commands that configure a new port forwarding (PortProxy) rule
Detects the use of NPS, a port forwarding and intranet penetration proxy server
Detects the execution of netsh to configure a port forwarding of port 3389 (RDP) rule
Detects powershell scripts that creates sockets/listeners which could be indicative of tunneling activity
Detects the execution of netsh commands that configure a new port forwarding (PortProxy) rule
Detects potentially suspicious execution of the Qemu utility in a Windows environment.
Threat actors have leveraged this utility and this technique for achieving network access as reported by Kaspersky.
Threat actors have leveraged this utility and this technique for achieving network access as reported by Kaspersky.
Detects the execution of netsh to configure a port forwarding of port 3389 (RDP) rule
Description:.
The query looks for several different MITRE techniques, grouped by risk level.
A weighting is applied to each risk level and a total score calculated per machine.
Techniques can be added/removed as required.
The query looks for several different MITRE techniques, grouped by risk level.
A weighting is applied to each risk level and a total score calculated per machine.
Techniques can be added/removed as required.
'Query finds accounts recorded as disabled by AD in previous time period but still using proxy in current time period. Presumes default squid log format is used. http://www.squid-cache.org/Doc/config/access_log/'
'Rule helps to detect Powershell user-agent activity by an unusual process other than a web browser.'
'Detects first connection to an unpopular website (possible malicious payload delivery).'
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