Samirbous
440a7fbdee
* [New Rule] SSH Authorized Keys File Modification * excluded some noisy procs * Update rules/cross-platform/persistence_ssh_authorized_keys_modification.toml Co-authored-by: David French <56409778+threat-punter@users.noreply.github.com> * Update rules/cross-platform/persistence_ssh_authorized_keys_modification.toml Co-authored-by: David French <56409778+threat-punter@users.noreply.github.com> * Update persistence_ssh_authorized_keys_modification.toml * Update rules/cross-platform/persistence_ssh_authorized_keys_modification.toml Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com> Co-authored-by: David French <56409778+threat-punter@users.noreply.github.com> Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com>
57 lines
1.7 KiB
TOML
57 lines
1.7 KiB
TOML
[metadata]
|
|
creation_date = "2020/12/22"
|
|
maturity = "production"
|
|
updated_date = "2020/12/22"
|
|
|
|
[rule]
|
|
author = ["Elastic"]
|
|
description = """
|
|
The Secure Shell (SSH) authorized_keys file specifies which users are allowed to log into a server using public key authentication.
|
|
Adversaries may modify it to maintain persistence on a victim host by adding their own public key(s).
|
|
"""
|
|
from = "now-9m"
|
|
index = ["auditbeat-*", "logs-endpoint.events.*"]
|
|
language = "kuery"
|
|
license = "Elastic License"
|
|
name = "SSH Authorized Keys File Modification"
|
|
risk_score = 47
|
|
rule_id = "2215b8bd-1759-4ffa-8ab8-55c8e6b32e7f"
|
|
severity = "medium"
|
|
tags = ["Elastic", "Host", "Linux", "macOS", "Threat Detection", "Persistence"]
|
|
type = "query"
|
|
|
|
query = '''
|
|
event.category:file and event.type:(change or creation) and
|
|
file.name:("authorized_keys" or "authorized_keys2") and
|
|
not process.executable:
|
|
(/Library/Developer/CommandLineTools/usr/bin/git or
|
|
/usr/local/Cellar/maven/*/libexec/bin/mvn or
|
|
/Library/Java/JavaVirtualMachines/jdk*.jdk/Contents/Home/bin/java or
|
|
/usr/bin/vim or
|
|
/usr/local/Cellar/coreutils/*/bin/gcat or
|
|
/usr/bin/bsdtar or
|
|
/usr/bin/nautilus or
|
|
/usr/bin/scp or
|
|
/usr/bin/touch or
|
|
/var/lib/docker/*)
|
|
'''
|
|
|
|
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
[[rule.threat.technique]]
|
|
id = "T1098"
|
|
name = "Account Manipulation"
|
|
reference = "https://attack.mitre.org/techniques/T1098/"
|
|
[[rule.threat.technique.subtechnique]]
|
|
id = "T1098.004"
|
|
name = "SSH Authorized Keys"
|
|
reference = "https://attack.mitre.org/techniques/T1098/004/"
|
|
|
|
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0003"
|
|
name = "Persistence"
|
|
reference = "https://attack.mitre.org/tactics/TA0003/"
|