mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
divious1
88 lines
3.4 KiB
JSON
88 lines
3.4 KiB
JSON
{
|
|
"asset_type": "Endpoint",
|
|
"channel": "ESCU",
|
|
"confidence": "medium",
|
|
"correlation_rule": {
|
|
"notable": {
|
|
"nes_fields": "dest, user, process_name",
|
|
"rule_description": "Using $process_name$ to delete shadow copies is common behavior by ransomware. This activity was observed on $dest$",
|
|
"rule_title": "Deleting Shadow Copies on $dest$ with $process_name$"
|
|
},
|
|
"risk": {
|
|
"risk_object": "dest",
|
|
"risk_object_type": [
|
|
"system"
|
|
],
|
|
"risk_score": 75
|
|
},
|
|
"suppress": {
|
|
"suppress_fields": "dest, user",
|
|
"suppress_period": "14400s"
|
|
}
|
|
},
|
|
"creation_date": "2017-02-17",
|
|
"data_metadata": {
|
|
"data_models": [
|
|
"Endpoint"
|
|
],
|
|
"data_source": [
|
|
"Endpoint Intel"
|
|
],
|
|
"providing_technologies": [
|
|
"Carbon Black Response",
|
|
"CrowdStrike Falcon",
|
|
"Sysmon",
|
|
"Tanium",
|
|
"Ziften"
|
|
]
|
|
},
|
|
"eli5": "This search looks for execution of vssadmin or wmic with both the \"delete\" and \"shadows\" parameters passed on the command-line. The two arguments are searched for separately because we can't predict the number of spaces between the words on the command-line. The search will return the number of times this activity was observed, and the times of the first and last event.",
|
|
"how_to_implement": "You must be ingesting endpoint data that tracks process activity, including parent-child relationships from your endpoints to populate the Endpoint data model in the Processes node. The command-line arguments are mapped to the \"process\" field in the Endpoint data model.",
|
|
"known_false_positives": "vssadmin.exe and wmic.exe are standard applications shipped with modern versions of windows. They may be used by administrators to legitimately delete old backup copies, although this is typically rare.",
|
|
"maintainers": [
|
|
{
|
|
"company": "Splunk",
|
|
"email": "bpatel@splunk.com",
|
|
"name": "Bhavin Patel"
|
|
}
|
|
],
|
|
"mappings": {
|
|
"cis20": [
|
|
"CIS 8",
|
|
"CIS 10"
|
|
],
|
|
"kill_chain_phases": [
|
|
"Actions on Objectives"
|
|
],
|
|
"mitre_attack": [
|
|
"Execution"
|
|
],
|
|
"nist": [
|
|
"PR.PT",
|
|
"DE.CM",
|
|
"PR.IP"
|
|
]
|
|
},
|
|
"modification_date": "2018-12-03",
|
|
"original_authors": [
|
|
{
|
|
"company": "Splunk",
|
|
"email": "davidd@splunk.com",
|
|
"name": "David Dorsey"
|
|
}
|
|
],
|
|
"scheduling": {
|
|
"cron_schedule": "0 * * * *",
|
|
"earliest_time": "-70m@m",
|
|
"latest_time": "-10m@m"
|
|
},
|
|
"search": "| tstats `summariesonly` count values(Processes.process) as process values(Processes.parent_process) as parent_process min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where (Processes.process_name=vssadmin.exe OR Processes.process_name=wmic.exe) by Processes.user Processes.process_name Processes.parent_process_name Processes.dest | `drop_dm_object_name(Processes)` | `ctime(firstTime)`| `ctime(lastTime)` | search process=*delete* AND process=*shadow*",
|
|
"search_description": "The vssadmin.exe utility is used to interact with the Volume Shadow Copy Service. Wmic is an interface to the Windows Management Instrumentation. This search looks for either of these tools being used to delete shadow copies.",
|
|
"search_id": "b89919ed-ee5f-492c-b139-95dbb162039e",
|
|
"search_name": "Deleting Shadow Copies",
|
|
"search_type": "detection",
|
|
"security_domain": "endpoint",
|
|
"spec_version": 1,
|
|
"version": "2.0"
|
|
}
|