diff --git a/rules/windows/command_and_control_iexplore_via_com.toml b/rules/windows/command_and_control_iexplore_via_com.toml index 55067b482..c6af56a51 100644 --- a/rules/windows/command_and_control_iexplore_via_com.toml +++ b/rules/windows/command_and_control_iexplore_via_com.toml @@ -1,7 +1,7 @@ [metadata] creation_date = "2020/11/28" maturity = "production" -updated_date = "2021/09/23" +updated_date = "2022/02/14" [rule] author = ["Elastic"] @@ -23,7 +23,7 @@ tags = ["Elastic", "Host", "Windows", "Threat Detection", "Command and Control"] type = "eql" query = ''' -sequence by host.id, user.id with maxspan = 5s +sequence by host.id, user.name with maxspan = 5s [library where dll.name : "IEProxy.dll" and process.name : ("rundll32.exe", "regsvr32.exe")] [process where event.type == "start" and process.parent.name : "iexplore.exe" and process.parent.args : "-Embedding"] /* IE started via COM in normal conditions makes few connections, mainly to Microsoft and OCSP related domains, add FPs here */ @@ -40,7 +40,7 @@ sequence by host.id, user.id with maxspan = 5s "*.office365.com", "*.office.com" ) - ] + ] /* with runs=5 */ '''