Tag: sysinfo syscall

Detect Linux Reconnaissance in Microsoft Sentinel with Sigma-to-KQL Conversion

June 13, 2025

Tags: Sigma translation, sysinfo syscall, Uncoder AI

How It Works The showcased feature translates a Linux-based Sigma rule — specifically targeting the sysinfo system call — into Microsoft Sentinel KQL. This system call provides an attacker with system metadata like uptime, memory usage, and load averages — commonly abused during reconnaissance. Left Panel – Sigma Rule: Targets Linux auditd telemetry for syscall […]

Name	Descripiton
PHPSESSID	Preserves user session state across page requests. Cookie generated by applications based on the PHP language. This is a general purpose identifier used to maintain user session variables. It is normally a random generated number, how it is used can be specific to the site, but a good example is maintaining a logged-in status for a user between pages.
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sp_r	Used to store information about authenticated User.
sp_a	Used to store information about authenticated User.

Name	Descripiton
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Name	Descripiton
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demdex	Via a unique ID that is used for semantic content analysis, the user's navigation on the website is registered and linked to offline data from surveys and similar registrations to display targeted ads.
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Name	Descripiton
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khaos	Registers anonymised user data, such as IP address, geographical location, visited websites, and what ads the user has clicked, with the purpose of optimising ad display based on the user's movement on websites that use the same ad network.
put_#	Registers anonymised user data, such as IP address, geographical location, visited websites, and what ads the user has clicked, with the purpose of optimising ad display based on the user's movement on websites that use the same ad network.
rpb	Registers anonymised user data, such as IP address, geographical location, visited websites, and what ads the user has clicked, with the purpose of optimising ad display based on the user's movement on websites that use the same ad network.
rpx	Registers anonymised user data, such as IP address, geographical location, visited websites, and what ads the user has clicked, with the purpose of optimising ad display based on the user's movement on websites that use the same ad network.
tap.php	Registers anonymised user data, such as IP address, geographical location, visited websites, and what ads the user has clicked, with the purpose of optimising ad display based on the user's movement on websites that use the same ad network.

Tag: sysinfo syscall

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