-
Notifications
You must be signed in to change notification settings - Fork 59
/
google_workspace_malicious_file_downloaded.yaral
57 lines (51 loc) · 2.16 KB
/
google_workspace_malicious_file_downloaded.yaral
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
/*
* Copyright 2023 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
rule google_workspace_malicious_file_downloaded {
meta:
author = "Google Cloud Security"
description = "Identifies when a user downloads a potentially malicious file from Google Drive."
mitre_attack_tactic = "Execution"
mitre_attack_technique = "User Execution: Malicious File"
mitre_attack_url = "https://attack.mitre.org/techniques/T1204/002/"
mitre_attack_version = "v13.1"
type = "Alert"
data_source = "Workspace Activity"
severity = "Medium"
priority = "Medium"
events:
$ws.metadata.vendor_name = "Google Workspace"
$ws.metadata.product_name = "drive"
($ws.metadata.product_event_type = "download" or
$ws.metadata.product_event_type = "view" or
$ws.metadata.product_event_type = "copy")
($ws.target.resource.attribute.labels["visibility"] = "people_with_link" or
$ws.target.resource.attribute.labels["visibility"] = "public_on_the_web")
$ws.target.resource.name = /.*dll|.*exe|.*scr|.*jar|.*pif|.*app|.*dmg|.*pkg|.*elf|.*so|.*bin|.*deb|.*rpm|.*sh|.*hta|.*lnk/
outcome:
$risk_score = max(35)
$mitre_attack_tactic = "Execution"
$mitre_attack_technique = "User Execution: Malicious File"
$mitre_attack_technique_id = "T1204.002"
$event_count = count_distinct($ws.metadata.id)
$product_event_type = $ws.metadata.product_event_type
$userid = $ws.principal.user.userid
$doc_type = $ws.src.resource.attribute.labels["doc_type"]
$owner = $ws.target.resource.attribute.labels["owner"]
$doc_name = $ws.target.resource.name
//$doc_id = $ws.target.resource.product_object_id
condition:
$ws
}