Identify Mango Sandstorm powershell commands

Requête originale, sans modification.

(union isfuzzy=true
(SecurityEvent
| where EventID == 4688
| where Process has_any ("powershell.exe","powershell_ise.exe","pwsh.exe") and CommandLine has_cs "-exec bypass -w 1 -enc"
| where CommandLine  contains_cs "UwB0AGEAcgB0AC0ASgBvAGIAIAAtAFMAYwByAGkAcAB0AEIAbABvAGMAawAgAHsAKABzAGEAcABzACAAKAAiAHAA"
| extend DvcHostname = Computer, ProcessId = tostring(ProcessId), ActorUsername = Account
),
(DeviceProcessEvents
| where FileName =~ "powershell.exe" and ProcessCommandLine has_cs "-exec bypass -w 1 -enc"
| where ProcessCommandLine contains_cs "UwB0AGEAcgB0AC0ASgBvAGIAIAAtAFMAYwByAGkAcAB0AEIAbABvAGMAawAgAHsAKABzAGEAcABzACAAKAAiAHAA"
| extend DvcHostname = DeviceName, ProcessId = tostring(InitiatingProcessId), ActorUsername = strcat(AccountDomain, @"\", AccountName)
),
(imProcessCreate
| where Process has_any ("powershell.exe","powershell_ise.exe","pwsh.exe") and CommandLine has_cs "-exec bypass -w 1 -enc"
| where CommandLine  contains_cs "UwB0AGEAcgB0AC0ASgBvAGIAIAAtAFMAYwByAGkAcAB0AEIAbABvAGMAawAgAHsAKABzAGEAcABzACAAKAAiAHAA"
| extend ProcessId = tostring(TargetProcessId)
)
)
| extend AccountName = tostring(split(ActorUsername, "\\")[0]), AccountNTDomain = tostring(split(ActorUsername, "\\")[1])
| extend HostName = tostring(split(DvcHostname, ".")[0]), DomainIndex = toint(indexof(DvcHostname, '.'))
| extend HostNameDomain = iff(DomainIndex != -1, substring(DvcHostname, DomainIndex + 1), DvcHostname)