Single Letter Process On Endpoint

The following analytic detects processes with names consisting of a single letter, which is often indicative of malware or an attacker attempting to evade detection. This detection leverages data from Endpoint Detection and Response (EDR) agents, focusing on process names and command-line executions. This activity is significant because attackers use such techniques to obscure their presence and carry out malicious activities like data theft or ransomware attacks. If confirmed malicious, this behavior could lead to unauthorized access, data exfiltration, or system compromise. Immediate investigation is required to determine the legitimacy of the process.

ATT&CK coverage

Execution

T1204User Execution
- T1204.002Malicious File 101 detections cover this technique

Detection requirements

Log source category: crowdstrike_processrollup2 sysmon_eventid_1 windows_event_log_security_4688

Detection logic

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Detection catalogue

ATT&CK coverage

Detection requirements

Detection logic