{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/winrm/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[],"_cs_exploited":false,"_cs_products":["Elastic Defend","SentinelOne Cloud Funnel"],"_cs_severities":["medium"],"_cs_tags":["lateral-movement","windows","winrm","remote-execution"],"_cs_type":"advisory","_cs_vendors":["Microsoft","Elastic","SentinelOne"],"content_html":"\u003cp\u003eWindows Remote Management (WinRM) is a protocol that allows for remote management and execution of commands on Windows machines. While beneficial for legitimate administrative tasks, adversaries can exploit WinRM for lateral movement by executing commands remotely. This detection rule identifies suspicious activity by monitoring network traffic on specific ports and processes initiated by WinRM (winrshost.exe), flagging potential unauthorized remote executions. The rule is designed for data generated by Elastic Defend, but also supports SentinelOne Cloud Funnel and Sysmon event logs. This detection can help identify attackers moving laterally within a Windows environment.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker gains initial access to a machine within the network (e.g., via phishing or exploiting a vulnerability).\u003c/li\u003e\n\u003cli\u003eThe attacker uses this compromised machine to scan the network for potential targets with WinRM enabled.\u003c/li\u003e\n\u003cli\u003eThe attacker attempts to authenticate to a target machine using stolen credentials or by exploiting a vulnerability in WinRM.\u003c/li\u003e\n\u003cli\u003eUpon successful authentication, the attacker establishes a WinRM session to the target machine over ports 5985 (HTTP) or 5986 (HTTPS).\u003c/li\u003e\n\u003cli\u003eThe attacker executes malicious commands on the target machine using the WinRM remote shell, often leveraging \u003ccode\u003ewinrshost.exe\u003c/code\u003e.\u003c/li\u003e\n\u003cli\u003eThe executed commands may include reconnaissance activities (e.g., \u003ccode\u003ewhoami\u003c/code\u003e, \u003ccode\u003enet user\u003c/code\u003e), privilege escalation attempts, or malware deployment.\u003c/li\u003e\n\u003cli\u003eThe attacker may use the compromised target to pivot to other systems, repeating the process and expanding their foothold.\u003c/li\u003e\n\u003cli\u003eThe final objective is typically data exfiltration, system compromise, or deployment of ransomware.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation via WinRM can lead to unauthorized access to sensitive data, system compromise, and lateral movement within the network. Attackers can leverage WinRM to execute arbitrary commands, deploy malware, and ultimately achieve their objectives, such as data theft or ransomware deployment. The impact can range from individual system compromise to widespread network breaches, depending on the attacker\u0026rsquo;s goals and the organization\u0026rsquo;s security posture.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eEnable Sysmon process creation (Event ID 1) and network connection (Event ID 3) logging to provide the necessary data for the Sigma rules.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule \u003ccode\u003eDetect Incoming WinRM Remote Shell Execution via Network Connection\u003c/code\u003e to identify suspicious network connections on ports 5985 and 5986.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule \u003ccode\u003eDetect Suspicious WinRM Processes\u003c/code\u003e to detect suspicious processes spawned by \u003ccode\u003ewinrshost.exe\u003c/code\u003e.\u003c/li\u003e\n\u003cli\u003eReview and whitelist known administrative IP addresses or users to reduce false positives as noted in the rule documentation.\u003c/li\u003e\n\u003cli\u003eImplement network segmentation to limit the ability of threats to move laterally across the network as described in the remediation steps.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2024-01-03T12:00:00Z","date_published":"2024-01-03T12:00:00Z","id":"/briefs/2024-01-winrm-lateral-movement/","summary":"This rule detects incoming execution via Windows Remote Management (WinRM) remote shell on a target host, which could be an indication of lateral movement by monitoring network traffic on ports 5985 or 5986 and processes initiated by WinRM.","title":"Incoming Execution via WinRM Remote Shell","url":"https://feed.craftedsignal.io/briefs/2024-01-winrm-lateral-movement/"}],"language":"en","title":"CraftedSignal Threat Feed — Winrm","version":"https://jsonfeed.org/version/1.1"}