{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/tags/kprobes/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["Linux Kernel"],"_cs_severities":["low"],"_cs_tags":["kernel","discovery","linux","tracefs","kprobes"],"_cs_type":"advisory","_cs_vendors":["Linux"],"content_html":"\u003cp\u003eThis brief addresses the potential discovery of kernel instrumentation tools, specifically Kprobes and Tracefs, on Linux systems. While the provided source material does not describe active exploitation or campaigns, it highlights a potential reconnaissance activity. Understanding the presence and configuration of kernel instrumentation frameworks is crucial for adversaries aiming to evade detection or manipulate kernel-level operations. Kprobes and Tracefs are powerful tools used for dynamic kernel tracing and debugging, and their presence can provide insights into existing monitoring or security solutions. Defenders should monitor for attempts to enumerate or interact with these kernel features by unauthorized users or processes.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003e\u003cstrong\u003eInitial Access:\u003c/strong\u003e The attacker gains initial access to the system through a vulnerability or compromised credentials (not specified in source).\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003ePrivilege Escalation (Optional):\u003c/strong\u003e If initial access is limited, the attacker attempts to escalate privileges to gain root or elevated access, necessary for kernel-level interaction (not specified in source).\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eFile System Enumeration:\u003c/strong\u003e The attacker lists the contents of \u003ccode\u003e/sys/kernel/debug/tracing\u003c/code\u003e to check for the presence of Tracefs.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eKprobes Discovery:\u003c/strong\u003e The attacker attempts to list available kprobes by reading files in \u003ccode\u003e/sys/kernel/debug/kprobes/\u003c/code\u003e.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eProcess Enumeration:\u003c/strong\u003e The attacker uses \u003ccode\u003eps\u003c/code\u003e or similar tools to identify processes that might be using Kprobes or Tracefs, such as tracing daemons.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eModule Discovery:\u003c/strong\u003e The attacker lists loaded kernel modules (\u003ccode\u003elsmod\u003c/code\u003e) to identify any tracing-related modules.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eConfiguration Inspection:\u003c/strong\u003e The attacker reads configuration files related to tracing (if found) to understand how the tools are being used.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eInformation Gathering:\u003c/strong\u003e The gathered information is used to tailor further attacks, evade detection, or manipulate kernel behavior.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful discovery of kernel instrumentation tools can allow an attacker to understand the existing security controls and monitoring mechanisms in place. This knowledge can be leveraged to craft more sophisticated attacks that evade detection, potentially leading to data breaches, system compromise, or other malicious activities. While direct impact is dependent on subsequent actions, the reconnaissance phase significantly increases the attacker's chances of success.\u003c/p\u003e\n","date_modified":"2024-01-04T12:00:00Z","date_published":"2024-01-04T12:00:00Z","id":"https://feed.craftedsignal.io/briefs/2024-01-04-kernel-instrumentation-discovery/","summary":"Adversaries may attempt to discover kernel instrumentation tools like Kprobes and Tracefs on Linux systems to understand the security landscape and potential detection mechanisms.","title":"Linux Kernel Instrumentation Discovery via Kprobes and Tracefs","url":"https://feed.craftedsignal.io/briefs/2024-01-04-kernel-instrumentation-discovery/"}],"language":"en","title":"CraftedSignal Threat Feed - Kprobes","version":"https://jsonfeed.org/version/1.1"}