Sigma medium test sigma
Uncommon New Firewall Rule Added In Windows Firewall Exception List
Detects when a rule has been added to the Windows Firewall exception list
Detection Logic
{
"selection": {
"EventID": [
2004,
2071,
2097
]
},
"filter_main_block": {
"Action": 2
},
"filter_main_generic": {
"ApplicationPath
| startswith": [
"C:\\Program Files (x86)\\",
"C:\\Program Files\\",
"C:\\Windows\\System32\\",
"C:\\Windows\\SysWOW64\\",
"C:\\Windows\\WinSxS\\"
]
},
"filter_main_covered_paths": {
"ApplicationPath
| contains": [
"C:\\PerfLogs\\",
"C:\\Temp\\",
"C:\\Tmp\\",
"C:\\Users\\Public\\",
"C:\\Windows\\Tasks\\",
"C:\\Windows\\Temp\\",
"\\AppData\\Local\\Temp\\"
]
},
"filter_main_system": {
"ApplicationPath": "SYSTEM",
"ModifyingApplication": [
"C:\\Windows\\System32\\dllhost.exe",
"C:\\Windows\\System32\\oobe\\Setup.exe",
"C:\\Windows\\System32\\svchost.exe"
]
},
"filter_main_ehome": {
"ApplicationPath
| startswith": "C:\\Windows\\ehome\\",
"ModifyingApplication": "C:\\Windows\\System32\\oobe\\Setup.exe"
},
"filter_main_tiworker": {
"ModifyingApplication
| startswith": "C:\\Windows\\WinSxS\\",
"ModifyingApplication
| endswith": "\\TiWorker.exe"
},
"filter_main_null": {
"ApplicationPath": null
},
"filter_optional_no_path": {
"ModifyingApplication": [
"C:\\Windows\\System32\\svchost.exe",
"C:\\Windows\\System32\\dllhost.exe"
],
"ApplicationPath": ""
},
"filter_optional_msmpeng": [
{
"ModifyingApplication
| startswith": [
"C:\\ProgramData\\Microsoft\\Windows Defender\\Platform\\",
"C:\\Program Files\\Windows Defender\\"
],
"ModifyingApplication
| endswith": "\\MsMpEng.exe"
},
{
"ApplicationPath
| startswith": [
"C:\\ProgramData\\Microsoft\\Windows Defender\\Platform\\",
"C:\\Program Files\\Windows Defender\\"
],
"ApplicationPath
| endswith": "\\MsMpEng.exe"
}
],
"filter_optional_systemApps": {
"ApplicationPath
| startswith": "C:\\Windows\\SystemApps\\",
"ModifyingApplication": "C:\\Windows\\System32\\svchost.exe"
},
"condition": "selection and not 1 of filter_main_* and not 1 of filter_optional_*"
} Field Validations
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