Detection rules › Elastic
Execution from a Password Protected Self Extracting Archive
Identifies the execution of a file from a password protected self-extracting archive. Adversaries may encapsulate malicious code in a protected archive to potentially bypass security controls.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution |
Rule body
[rule]
description = """
Identifies the execution of a file from a password protected self-extracting archive. Adversaries may encapsulate
malicious code in a protected archive to potentially bypass security controls.
"""
id = "559bb183-f343-4ad6-926f-144db38018d6"
license = "Elastic License v2"
name = "Execution from a Password Protected Self Extracting Archive"
os_list = ["windows"]
reference = [
"https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/archive-sidestepping-self-unlocking-password-protected-rar/",
]
version = "1.0.22"
query = '''
sequence with maxspan=1m
[file where event.action : "creation" and file.name : "*_sfx_access_check*"] by process.entity_id
[process where event.action : "start" and
process.parent.args : "-p*" and process.parent.args : "-d*"] by process.parent.entity_id
'''
min_endpoint_version = "7.15.0"
optional_actions = []
[[actions]]
action = "kill_process"
field = "process.entity_id"
state = 1
[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1204"
name = "User Execution"
reference = "https://attack.mitre.org/techniques/T1204/"
[[threat.technique.subtechnique]]
id = "T1204.002"
name = "Malicious File"
reference = "https://attack.mitre.org/techniques/T1204/002/"
[threat.tactic]
id = "TA0002"
name = "Execution"
reference = "https://attack.mitre.org/tactics/TA0002/"
[internal]
min_endpoint_version = "7.15.0"
Stages and Predicates
Ordered sequence: each step below must occur in order within 1m, correlated by process.entity_id, process.parent.entity_id.
Stage 1: file
[file where event.action : "creation" and file.name : "*_sfx_access_check*"] by process.entity_id
Stage 2: process
[process where event.action : "start" and
process.parent.args : "-p*" and process.parent.args : "-d*"] by process.parent.entity_id
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
event.action | wildcard |
| field:"EventType" kind:wildcard |
file.name | wildcard |
| field:"file.name" kind:wildcard value:"*_sfx_access_check*" |
process.parent.args | wildcard |
| field:"process.parent.args" kind:wildcard |