Hayabusa low test sigma
WMI Module Loaded By Uncommon Process
Detects WMI modules being loaded by an uncommon process
Detection Logic
{
"image_load": {
"EventID": 7,
"Channel": "Microsoft-Windows-Sysmon/Operational"
},
"selection": {
"ImageLoaded
| endswith": [
"\\fastprox.dll",
"\\wbemcomn.dll",
"\\wbemprox.dll",
"\\wbemsvc.dll",
"\\WmiApRpl.dll",
"\\wmiclnt.dll",
"\\WMINet_Utils.dll",
"\\wmiprov.dll",
"\\wmiutils.dll"
]
},
"filter_main_generic": {
"Image
| contains": [
":\\Program Files (x86)\\",
":\\Program Files\\",
":\\Windows\\explorer.exe",
":\\Windows\\Microsoft.NET\\Framework\\",
":\\Windows\\Microsoft.NET\\FrameworkArm\\",
":\\Windows\\Microsoft.NET\\FrameworkArm64\\",
":\\Windows\\Microsoft.NET\\Framework64\\",
":\\Windows\\System32\\",
":\\Windows\\SysWOW64\\"
]
},
"filter_optional_other": {
"Image
| endswith": [
"\\WindowsAzureGuestAgent.exe",
"\\WaAppAgent.exe"
]
},
"filter_optional_thor": {
"Image
| endswith": [
"\\thor.exe",
"\\thor64.exe"
]
},
"filter_optional_defender": {
"Image
| endswith": "\\MsMpEng.exe"
},
"filter_optional_teams": {
"Image
| contains": [
"\\Microsoft\\Teams\\current\\Teams.exe",
"\\Microsoft\\Teams\\Update.exe"
]
},
"filter_optional_sysmon": {
"Image
| endswith": [
":\\Windows\\Sysmon.exe",
":\\Windows\\Sysmon64.exe",
":\\Windows\\Sysmon64a.exe"
]
},
"condition": "image_load and (selection and not 1 of filter_main_* and not 1 of filter_optional_*)"
} False Positives
- ⚠ Unknown
Field Validations
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