Imminent Ransomware

Requête originale, sans modification.

_ASim_ProcessEvent 
// Pivot on specific commands 
| where CommandLine has_any("-ExclusionPath", "Set-MpPreference", "advfirewall", "-ExclusionExtension", 
"-EnableControlledFolderAccess", "windefend", "onstart", "bcdedit", "Startup") 
// Making list of found commands 
| summarize CommandLine = make_set(CommandLine, 10000) by DvcId, Dvc, bin(TimeGenerated, 6h) 
// Extending columns for later aggregration, based on TTP
| extend StartUpExclusionPath = iff(CommandLine has_all("-ExclusionPath", "Startup"), 1, 0) 
| extend DefenderTamp = iff(CommandLine has "Set-MpPreference" 
and CommandLine has_any( 
"-SevereThreatDefaultAction 6" 
"-HighThreatDefaultAction 6", 
"-ModerateThreatDefaultAction 6", 
"-LowThreatDefaultAction 6" 
"-ScanScheduleDay 8"), 1, 0) 
| extend NetshFirewallTampering = iff(CommandLine has_all( "netsh", "advfirewall", "allprofiles state off"), 1, 0) 
| extend BatExclusion = iff(CommandLine has_all("-ExclusionExtension", ".bat"), 1, 0) 
| extend ExeExclusion = iff(CommandLine has_all("-ExclusionExtension", ".exe"), 1, 0) 
| extend DisableControlledFolderAccess = iff(CommandLine has_all("-EnableControlledFolderAccess", "Disabled"), 1, 0) 
| extend ScDeleteDefend = iff(CommandLine has_all("sc", "delete", "windefend"), 1, 0) 
| extend BootTampering = iff(CommandLine has_all("bcdedit", "default") and CommandLine has_any ("recoveryenabled No", "bootstatuspolicy ignoreallfailures"), 1, 0) 
| extend SchTasks = iff(CommandLine has_all("/sc", "onstart", "system", "/create", "/delay"), 1, 0) 
// Summarizing found commands 
| summarize by NetshFirewallTampering ,BatExclusion, ExeExclusion, DisableControlledFolderAccess, ScDeleteDefend, SchTasks, BootTampering, DefenderTamp, StartUpExclusionPath, DvcId, Dvc, TimeGenerated 
// Adding up each piece of evidence 
| extend EvidenceCount = NetshFirewallTampering + BatExclusion + ExeExclusion + DisableControlledFolderAccess + ScDeleteDefend + SchTasks + BootTampering + DefenderTamp + StartUpExclusionPath 
| where EvidenceCount > 4
| extend HostName = iff(Dvc has '.', substring(Dvc, 0, indexof(Dvc, '.')), Dvc)
| extend DnsDomain = iff(Dvc has '.', substring(Dvc, indexof(Dvc, '.') + 1), "")