mirror of
https://github.com/splunk/security_content
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divious1
88 lines
3.2 KiB
JSON
88 lines
3.2 KiB
JSON
{
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"asset_type": "Endpoint",
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"channel": "ESCU",
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"confidence": "medium",
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"correlation_rule": {
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"notable": {
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"nes_fields": "dest, process, parent_process_name",
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"rule_description": "Mshta.exe is seen to be executing scripts via the command-line arguments",
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"rule_title": "Mshta.exe is executing scripts 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": 50
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},
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"suppress": {
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"suppress_fields": "dest, process, parent_process_name",
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"suppress_period": "86400s"
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}
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},
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"creation_date": "2018-08-07",
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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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"Tanium",
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"Ziften"
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]
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},
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"eli5": "Mshta.exe is a built-in Windows utility that can launch HTML files with .hta extensions (HTML applications), javascript, or VBScript. The search detects this behavior by looking for events where the process mshta.exe is executed with command-line arguments that indicate that a script is invoked",
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"how_to_implement": "To successfully implement this search, you need to be ingesting logs with the process name, parent process, and command-line executions from your endpoints. If you are using Sysmon, you must have at least version 6.0.4 of the Sysmon TA.",
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"known_false_positives": "Although unlikely, some legitimate applications may exhibit this behavior, triggering a false positive.",
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"maintainers": [
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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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"Exploitation"
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],
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"mitre_attack": [
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"Execution",
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"Command-Line Interface",
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"Persistence"
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],
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"nist": [
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"PR.PT",
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"DE.CM"
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]
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},
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"modification_date": "2018-12-03",
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"original_authors": [
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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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"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(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=mshta.exe by Processes.user Processes.process_name Processes.parent_process_name Processes.dest | `drop_dm_object_name(Processes)` | `ctime(firstTime)`| `ctime(lastTime)`| search (process=*vbscript* OR process=*javascript*)",
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"search_description": "This search looks for the execution of \"mshta.exe\" with command-line arguments that launch a script. The search will return the first time and last time these command-line arguments were used for these executions, as well as the target system, the user, process \"mshta.exe\" and its parent process.",
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"search_id": "b89919ed-fe5f-492c-b139-95dqb161039e",
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"search_name": "Detect mshta.exe running scripts in command-line arguments",
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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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