Hayabusa high test sigma
Sysmon Configuration Error
Detects when an adversary is trying to hide it's action from Sysmon logging based on error messages
Detection Logic
{
"sysmon_error": {
"EventID": 255,
"Channel": "Microsoft-Windows-Sysmon/Operational"
},
"selection_error": {
"Description
| contains": [
"Failed to open service configuration with error",
"Failed to connect to the driver to update configuration"
]
},
"filter_generic_english": {
"Description
| contains
| all": [
"Failed to open service configuration with error",
"Last error: The media is write protected."
]
},
"filter_generic_french": {
"Description
| contains
| all": [
"Failed to open service configuration with error",
"Last error: Média protégé en écriture."
]
},
"filter_by_errorcode": {
"Description
| contains": [
"Failed to open service configuration with error 19",
"Failed to open service configuration with error 93"
]
},
"condition": "sysmon_error and (selection_error and not 1 of filter*)"
} False Positives
- ⚠ Legitimate administrative action
Field Validations
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