DeviceNetworkEvents| where Timestamp > ago(30d)| where ActionType == "ListeningConnectionCreated"| where LocalPort == "1801"| where InitiatingProcessVersionInfoOriginalFileName has "MQSVC"| summarize by DeviceName

DeviceNetworkEvents| where TimeGenerated > ago(30d)| where ActionType == "ListeningConnectionCreated"| where LocalPort == "1801"| where InitiatingProcessVersionInfoOriginalFileName has "MQSVC"| summarize by DeviceName

//possible exploitation of CVE-2023-21554//if successful look for a a follow-up outbound connection to the same external IP or to a possible secondary C2 connection. This would likely result in a child process being spawned from mqsvc.exe that should also be investigated. On the external facing infra this will likely materialise in a webshell or similar.DeviceNetworkEvents| where InitiatingProcessFileName =~ "mqsvc.exe" and LocalPort == 1801 and ActionType == 'InboundConnectionAccepted'

DeviceProcessEvents| where ( InitiatingProcessFileName has "mqsvc.exe" and isnotempty(FileName) ) or (InitiatingProcessParentFileName has "mqsvc.exe" and isnotempty(InitiatingProcessFileName) )