discovery_suspicious_memory_grep_activity.toml

[metadata]
bypass_bbr_timing = true
creation_date = "2024/02/05"
integration = ["endpoint"]
maturity = "production"
updated_date = "2024/05/21"

[rule]
author = ["Elastic"]
building_block_type = "default"
description = """
Monitors for grep activity related to memory mapping. The /proc/*/maps file in Linux provides a memory map for a
specific process, detailing the memory segments, permissions, and what files are mapped to these segments. Attackers may
read a process's memory map to identify memory addresses for code injection or process hijacking.
"""
from = "now-9m"
index = ["logs-endpoint.events.*", "endgame-*"]
language = "eql"
license = "Elastic License v2"
name = "Suspicious Memory grep Activity"
references = ["https://github.com/arget13/DDexec"]
risk_score = 21
rule_id = "d74d6506-427a-4790-b170-0c2a6ddac799"
severity = "low"
tags = [
    "Domain: Endpoint",
    "OS: Linux",
    "Use Case: Threat Detection",
    "Tactic: Discovery",
    "Rule Type: BBR",
    "Data Source: Elastic Defend",
    "Data Source: Elastic Endgame",
]
timestamp_override = "event.ingested"
type = "eql"

query = '''
process where host.os.type == "linux" and event.type == "start" and event.action in ("exec", "exec_event") and
process.name in ("grep", "egrep", "fgrep", "rgrep") and process.args in ("[stack]", "[vdso]", "[heap]")
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1057"
name = "Process Discovery"
reference = "https://attack.mitre.org/techniques/T1057/"


[rule.threat.tactic]
id = "TA0007"
name = "Discovery"
reference = "https://attack.mitre.org/tactics/TA0007/"