mirror of
https://github.com/splunk/security_content
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divious1
89 lines
3.3 KiB
JSON
89 lines
3.3 KiB
JSON
{
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"asset_type": "Endpoint",
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"channel": "ESCU",
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"confidence": "high",
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"correlation_rule": {
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"notable": {
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"nes_fields": "dest, file_name",
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"rule_description": "A file, $file_name$, was created in the default shim database directory on $dest.",
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"rule_title": "Shim database file created on $dest$"
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},
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"risk": {
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"risk_object": "dest",
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"risk_object_type": [
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"system"
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],
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"risk_score": 20
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},
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"suppress": {
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"suppress_fields": "dest",
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"suppress_period": "14400s"
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}
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},
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"creation_date": "2017-10-03",
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"data_metadata": {
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"data_models": [
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"Endpoint"
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],
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"data_source": [
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"Endpoint Intel"
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],
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"providing_technologies": [
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"Carbon Black Response",
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"CrowdStrike Falcon",
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"Sysmon"
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]
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},
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"eli5": "This search looks for files being created in <code>Windows\\AppPatch\\Custom and Windows\\AppPatch\\Custom64</code>, the location where shim databases are installed. It will return all the files created, as well as the time of creation for the first and last file for each endpoint.",
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"how_to_implement": "You must be ingesting data that records the filesystem activity from your hosts to populate the Endpoint file-system data model node. If you are using Sysmon, you will need a Splunk Universal Forwarder on each endpoint from which you want to collect data.",
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"known_false_positives": "Because legitimate shim files are created and used all the time, this event, in itself, is not suspicious. However, if there are other correlating events, it may warrant further investigation.",
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"maintainers": [
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{
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"company": "Splunk",
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"email": "davidd@splunk.com",
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"name": "David Dorsey"
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},
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{
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"company": "Splunk",
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"email": "bpatel@splunk.com",
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"name": "Bhavin Patel"
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}
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],
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"mappings": {
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"cis20": [
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"CIS 8"
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],
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"kill_chain_phases": [
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"Actions on Objectives"
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],
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"mitre_attack": [
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"Persistence",
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"Application Shimming"
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],
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"nist": [
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"DE.CM"
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]
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},
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"modification_date": "2018-11-02",
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"original_authors": [
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{
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"company": "Splunk",
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"email": "davidd@splunk.com",
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"name": "David Dorsey"
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}
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],
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"scheduling": {
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"cron_schedule": "0 * * * *",
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"earliest_time": "-70m@m",
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"latest_time": "-10m@m"
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},
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"search": "| tstats `summariesonly` count values(Filesystem.action) values(Filesystem.file_hash) as file_hash values(Filesystem.file_path) as file_path min(_time) as firstTime max(_time) as lastTime FROM datamodel=Endpoint.Filesystem where Filesystem.file_path=*Windows\\AppPatch\\Custom* by Filesystem.file_name Filesystem.dest | `ctime(lastTime)` | `ctime(firstTime)` |`drop_dm_object_name(Filesystem)`",
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"search_description": "This search looks for shim database files being written to default directories. The sdbinst.exe application is used to install shim database files (.sdb). According to Microsoft, a shim is a small library that transparently intercepts an API, changes the parameters passed, handles the operation itself, or redirects the operation elsewhere.",
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"search_id": "6e4c4588-ba2f-42fa-97e6-9f6f548eaa33",
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"search_name": "Shim Database File Creation",
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"search_type": "detection",
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"security_domain": "endpoint",
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"spec_version": 1,
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"version": "2.0"
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}
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