sigma-rules/rules/linux/credential_access_gdb_process_hooking.toml

[metadata]
creation_date = "2023/08/30"
integration = ["endpoint", "auditd_manager", "crowdstrike", "sentinel_one_cloud_funnel"]
maturity = "production"
min_stack_version = "8.13.0"
min_stack_comments = "Breaking change at 8.13.0 for SentinelOne Integration."
updated_date = "2025/01/07"

[rule]
author = ["Elastic"]
description = """
This rule monitors for potential memory dumping through gdb. Attackers may leverage memory dumping techniques to attempt
secret extraction from privileged processes. Tools that display this behavior include "truffleproc" and
"bash-memory-dump". This behavior should not happen by default, and should be investigated thoroughly.
"""
from = "now-9m"
index = ["logs-endpoint.events.*", "endgame-*", "auditbeat-*", "logs-auditd_manager.auditd-*", "logs-crowdstrike.fdr*", "logs-sentinel_one_cloud_funnel.*"]
language = "eql"
license = "Elastic License v2"
name = "Linux Process Hooking via GDB"
references = ["https://github.com/controlplaneio/truffleproc", "https://github.com/hajzer/bash-memory-dump"]
risk_score = 21
rule_id = "66c058f3-99f4-4d18-952b-43348f2577a0"
severity = "low"
tags = [
    "Domain: Endpoint",
    "OS: Linux",
    "Use Case: Threat Detection",
    "Tactic: Credential Access",
    "Data Source: Elastic Defend",
    "Data Source: Elastic Endgame",
    "Data Source: Auditd Manager",
    "Data Source: Crowdstrike",
    "Data Source: SentinelOne",
]
timestamp_override = "event.ingested"
type = "eql"

query = '''
process where host.os.type == "linux" and event.type == "start" and event.action in ("exec", "exec_event", "start", "ProcessRollup2", "executed", "process_started")
 and process.name == "gdb" and process.args in ("--pid", "-p") and 
/* Covered by d4ff2f53-c802-4d2e-9fb9-9ecc08356c3f */
process.args != "1"
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1003"
name = "OS Credential Dumping"
reference = "https://attack.mitre.org/techniques/T1003/"
[[rule.threat.technique.subtechnique]]
id = "T1003.007"
name = "Proc Filesystem"
reference = "https://attack.mitre.org/techniques/T1003/007/"



[rule.threat.tactic]
id = "TA0006"
name = "Credential Access"
reference = "https://attack.mitre.org/tactics/TA0006/"