[New Rule] Potential SSH Password Grabbing via strace (#5294)

Author: Aegrah

rules/linux/credential_access_ssh_password_grabbing_via_strace.toml

@@ -0,0 +1,67 @@
+[metadata]
+creation_date = "2025/11/10"
+integration = ["endpoint"]
+maturity = "production"
+updated_date = "2025/11/10"
+
+[rule]
+author = ["Elastic"]
+description = """
+Detects potential SSH password grabbing via the use of strace on sshd processes. Attackers may use strace to capture
+sensitive information, such as passwords, by tracing system calls made by the sshd process. This rule looks for a sequence
+of events where an sshd process ends followed closely by the start of a strace process. This may be indicative of an attacker
+attempting to capture SSH credentials.
+"""
+from = "now-9m"
+index = ["logs-endpoint.events.process-*"]
+language = "eql"
+license = "Elastic License v2"
+name = "Potential SSH Password Grabbing via strace"
+references = [
+    "https://github.com/braindead-sec/ssh-grabber",
+    "https://dfir.ch/posts/strace/",
+]
+risk_score = 47
+rule_id = "9eaa3fb1-3f70-48ed-bb0e-d7ae4d3c8f28"
+severity = "medium"
+tags = [
+    "Domain: Endpoint",
+    "OS: Linux",
+    "Use Case: Threat Detection",
+    "Tactic: Persistence",
+    "Tactic: Credential Access",
+    "Data Source: Elastic Defend",
+]
+timestamp_override = "event.ingested"
+type = "eql"
+query = '''
+sequence by host.id with maxspan=3s
+  [process where host.os.type == "linux" and event.type == "end" and process.name == "sshd"]
+  [process where host.os.type == "linux" and event.type == "start" and event.action == "exec" and process.name == "strace"]
+'''
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+
+[[rule.threat.technique]]
+id = "T1556"
+name = "Modify Authentication Process"
+reference = "https://attack.mitre.org/techniques/T1556/"
+
+[rule.threat.tactic]
+id = "TA0006"
+name = "Credential Access"
+reference = "https://attack.mitre.org/tactics/TA0006/"
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+
+[[rule.threat.technique]]
+id = "T1554"
+name = "Compromise Host Software Binary"
+reference = "https://attack.mitre.org/techniques/T1554/"
+
+[rule.threat.tactic]
+id = "TA0003"
+name = "Persistence"
+reference = "https://attack.mitre.org/tactics/TA0003/"