Samirbous
def2a9ef09
* [New] ROT encoded Python Script Execution * Update defense_evasion_encoding_rot13_python_script.toml * ++ * Update defense_evasion_encoding_rot13_python_script.toml --------- Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
64 lines
1.9 KiB
TOML
64 lines
1.9 KiB
TOML
[metadata]
|
|
creation_date = "2024/09/17"
|
|
integration = ["endpoint"]
|
|
maturity = "production"
|
|
updated_date = "2024/09/17"
|
|
|
|
[rule]
|
|
author = ["Elastic"]
|
|
description = """
|
|
Identifies the execution of a Python script that uses the ROT cipher for letters substitution. Adversaries may
|
|
use this method to encode and obfuscate part of their malicious code in legit python packages.
|
|
"""
|
|
from = "now-9m"
|
|
index = ["logs-endpoint.events.process-*", "logs-endpoint.events.file-*"]
|
|
language = "eql"
|
|
license = "Elastic License v2"
|
|
name = "ROT Encoded Python Script Execution"
|
|
references = [
|
|
"https://www.elastic.co/security-labs/dprk-code-of-conduct",
|
|
"https://www.reversinglabs.com/blog/fake-recruiter-coding-tests-target-devs-with-malicious-python-packages"
|
|
]
|
|
risk_score = 47
|
|
rule_id = "5ab49127-b1b3-46e6-8a38-9e8512a2a363"
|
|
severity = "medium"
|
|
tags = [
|
|
"Domain: Endpoint",
|
|
"OS: Windows",
|
|
"OS: macOS",
|
|
"Use Case: Threat Detection",
|
|
"Tactic: Defense Evasion",
|
|
"Data Source: Elastic Defend",
|
|
]
|
|
type = "eql"
|
|
|
|
query = '''
|
|
sequence by process.entity_id with maxspan=1m
|
|
[process where host.os.type in ("windows", "macos") and event.type == "start" and process.name : "python*"]
|
|
[file where host.os.type in ("windows", "macos") and
|
|
event.action != "deletion" and process.name : "python*" and file.name : "rot_??.cpython-*.pyc*"]
|
|
'''
|
|
|
|
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
[[rule.threat.technique]]
|
|
id = "T1140"
|
|
name = "Deobfuscate/Decode Files or Information"
|
|
reference = "https://attack.mitre.org/techniques/T1140/"
|
|
[[rule.threat.technique]]
|
|
id = "T1027"
|
|
name = "Obfuscated Files or Information"
|
|
reference = "https://attack.mitre.org/techniques/T1027/"
|
|
[[rule.threat.technique.subtechnique]]
|
|
id = "T1027.013"
|
|
name = "Encrypted/Encoded File"
|
|
reference = "https://attack.mitre.org/techniques/T1027/013/"
|
|
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0005"
|
|
name = "Defense Evasion"
|
|
reference = "https://attack.mitre.org/tactics/TA0005/"
|
|
|