{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/actors/observed-in-multiple-ransomware-families/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":["Observed in multiple ransomware families","xmrig"],"_cs_cpes":[],"_cs_cves":[],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["Windows"],"_cs_severities":["medium"],"_cs_tags":["endpoint","sc.exe","service_control","privilege_escalation","defense_evasion","ransomware"],"_cs_type":"advisory","_cs_vendors":["Microsoft"],"content_html":"\u003cp\u003eThis detection identifies potentially malicious activity related to the excessive use of \u003ccode\u003esc.exe\u003c/code\u003e, the Windows Service Control Manager command-line utility. Observed in various ransomware campaigns and malware such as XMRig, adversaries leverage \u003ccode\u003esc.exe\u003c/code\u003e to create, modify, delete, or disable system services. These actions may target security applications to weaken defenses or be used for privilege escalation to gain elevated access. The detection logic analyzes process creation events for \u003ccode\u003esc.exe\u003c/code\u003e, identifies outliers in its execution frequency, and highlights potentially malicious instances that deviate significantly from established baselines. This activity warrants investigation as it often precedes or accompanies more severe malicious actions.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eInitial Access: Adversary gains access to the target system through unspecified means (e.g., exploitation, compromised credentials).\u003c/li\u003e\n\u003cli\u003ePersistence: The adversary uses sc.exe to create a new service configured to execute a malicious payload upon system restart.\u003c/li\u003e\n\u003cli\u003eDefense Evasion: sc.exe is used to disable or delete existing services, potentially including security software or logging mechanisms.\u003c/li\u003e\n\u003cli\u003ePrivilege Escalation: A vulnerable service is identified or created, and sc.exe is used to modify its configuration, allowing the adversary to execute code with elevated privileges.\u003c/li\u003e\n\u003cli\u003eExecution: sc.exe is used to start the modified or newly created service, triggering the execution of the malicious payload.\u003c/li\u003e\n\u003cli\u003eLateral Movement: The adversary uses sc.exe combined with other tools (e.g., PsExec, WMI) to manage services on other systems in the network, facilitating lateral movement.\u003c/li\u003e\n\u003cli\u003eImpact: Depending on the adversary's objective, the final impact could range from data exfiltration to system encryption (ransomware), achieved through services manipulated with sc.exe.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eCompromise via excessive \u003ccode\u003esc.exe\u003c/code\u003e usage can lead to significant disruption, including disabling critical security controls, escalating privileges, and enabling lateral movement across a network. Successful exploitation often results in malware deployment, data theft, or ransomware encryption. While specific victim numbers are not detailed in the source, the targeted sectors typically include organizations vulnerable to ransomware attacks. The impact of a successful attack includes data loss, financial damage, and reputational harm.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eEnable Sysmon process creation logging (EventCode 1) to capture \u003ccode\u003esc.exe\u003c/code\u003e executions for detection using the provided Sigma rules.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule \u0026quot;Excessive SC.exe Usage Detection\u0026quot; to your SIEM to detect anomalous \u003ccode\u003esc.exe\u003c/code\u003e activity and tune thresholds based on your environment.\u003c/li\u003e\n\u003cli\u003eInvestigate any alerts generated by the Sigma rule \u0026quot;SC.exe Service Manipulation\u0026quot; to identify potential malicious service modifications.\u003c/li\u003e\n\u003cli\u003eFilter benign usage of \u003ccode\u003esc.exe\u003c/code\u003e using the \u0026quot;\u003ccode\u003eexcessive_usage_of_sc_service_utility_filter\u003c/code\u003e\u0026quot; macro, customizing it with known-good software that legitimately uses the utility.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2024-01-03T12:00:00Z","date_published":"2024-01-03T12:00:00Z","id":"https://feed.craftedsignal.io/briefs/2024-01-excessive-sc-usage/","summary":"Detection of anomalous usage of sc.exe, often abused by ransomware and malware to manipulate services for privilege escalation or disabling security measures.","title":"Excessive Usage of SC Service Utility","url":"https://feed.craftedsignal.io/briefs/2024-01-excessive-sc-usage/"}],"language":"en","title":"CraftedSignal Threat Feed - Observed in Multiple Ransomware Families","version":"https://jsonfeed.org/version/1.1"}