Elastic Security Detection Rules

Root Network Connection via GDB CAP_SYS_PTRACE

Last updated 4 months ago on 2025-02-04
Created a year ago on 2024-01-09

About

Identifies instances where GDB (granted the CAP_SYS_PTRACE capability) is executed, after which an outbound network connection is initiated by UID/GID 0 (root). In Linux, the CAP_SYS_PTRACE capability grants a process the ability to use the ptrace system call, which is typically used for debugging and allows the process to trace and control other processes. Attackers may leverage this capability to hook and inject into a process that is running with root permissions in order to execute shell code and gain a reverse shell with root privileges.
Tags
Domain: EndpointOS: LinuxUse Case: Threat DetectionTactic: Privilege EscalationTactic: ExecutionTactic: Command and ControlData Source: Elastic DefendLanguage: eql
Severity
medium
Risk Score
47
MITRE ATT&CK™

Privilege Escalation (TA0004)(opens in a new tab or window)

↳ Process Injection (T1055)(opens in a new tab or window)

↳ Exploitation for Privilege Escalation (T1068)(opens in a new tab or window)

Execution (TA0002)(opens in a new tab or window)

↳ Command and Scripting Interpreter (T1059)(opens in a new tab or window)

Command and Control (TA0011)(opens in a new tab or window)

↳ Application Layer Protocol (T1071)(opens in a new tab or window)

License
Elastic License v2(opens in a new tab or window)

Definition

Rule Type
Event Correlation Rule
Integration Pack
Prebuilt Security Detection Rules
Index Patterns
logs-endpoint.events.network*logs-endpoint.events.process*
Related Integrations

endpoint(opens in a new tab or window)

Query
sequence by host.id, process.entry_leader.entity_id with maxspan=30s
  [process where host.os.type == "linux" and event.type == "start" and event.action == "exec" and process.name == "gdb" and
   (process.thread.capabilities.effective : "CAP_SYS_PTRACE" or process.thread.capabilities.permitted : "CAP_SYS_PTRACE") and
   user.id != "0"]
  [network where host.os.type == "linux" and event.action == "connection_attempted" and event.type == "start" and
   process.name != null and user.id == "0"]

Install detection rules in Elastic Security

Detect Root Network Connection via GDB CAP_SYS_PTRACE in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(opens in a new tab or window).