Set Thread Context Remote Api Call Query

# Rule : Detection of SetThreadContext Remote API Call ## Description This detection rule identifies suspicious usage of the `SetThreadContext` function for remote API calls. The `SetThreadContext` function is used to modify the context of a specified thread, which can be leveraged by malicious actors to inject code into another process's address space. This technique allows attackers to execute arbitrary code within the context of another process, potentially leading to unauthorized actions or evasion of security controls. According to the MITRE ATT&CK framework, this technique falls under "Process Injection: Thread Execution Hijacking" (T1055.003). This rule helps detect and audit suspicious usage of `SetThreadContext`, providing an early warning for potential malicious activities involving process injection. - [MITRE ATT&CK: Thread Execution Hijacking](https://attack.mitre.org/techniques/T1055/003/) ## Detection Logic - Monitors `DeviceEvents` for events where: - The `ActionType` is "SetThreadContextRemoteApiCall". ## Tags - Process Injection - SetThreadContext - Remote API Call - MITRE ATT&CK T1055.003 - Suspicious Activity ## Search Query ```kql DeviceEvents | where ActionType == "SetThreadContextRemoteApiCall" ```

Explanation

Summary of the Query

Purpose: The query is designed to detect suspicious activities involving the SetThreadContext function, which can be used by attackers to inject code into another process's address space.

Description:

Function Monitored: SetThreadContext
Suspicious Activity: Modifying the context of a thread in another process, which can be used for malicious code injection.
Potential Impact: Unauthorized actions or evasion of security controls.
MITRE ATT&CK Technique: Process Injection: Thread Execution Hijacking (T1055.003).

Detection Logic:

Data Source: DeviceEvents
Condition: The event's ActionType is "SetThreadContextRemoteApiCall".

Tags:

Process Injection
SetThreadContext
Remote API Call
MITRE ATT&CK T1055.003
Suspicious Activity

KQL Query:

DeviceEvents
| where ActionType == "SetThreadContextRemoteApiCall"

This query helps in identifying and auditing potential malicious activities involving the SetThreadContext function, providing an early warning for process injection attempts.

KQL Search