Threat Dismissed vs threat cleaned up vs threat Cleaned up failed.

Hi,

Can someone tell me the difference between threat dismissed and threat cleaned up? we do have a siem tool in which sophos logs are integrated. Looking on the sophos logs i could see various action performed by the sophos on malware. Below are the list:

Event::Endpoint::Threat::Detected

Event::Endpoint::Threat::CleanedUp

Event::Endpoint::Threat::Dismissed

Event::Endpoint::Threat::CleanupFailed

Here is the sample log of the threat dismissed:

What does it actually mean? Does it mean that the malware was present on the host and it successfully cleaned or is it that sophos does not have the access to the file and dismissed.

2017-10-18T04:49:15.538Z rt="2017-10-18T04:49:15.538Z"; endpoint_id="XXX3-f3e0-348b-f8fe-XXXXX"; end="2017-10-18T04:49:14.000Z"; severity="low"; duid="5XXXXXX the threat?5b"; whitelist_properties="{}"; dhost="XXXXX"; endpoint_type="computer"; threat="JS/FakeAle-SG"; suser="XXXX"; group="MALWARE"; customer_id="e2d5ae87-30a1-94fc-c9af-abf897302372"; type="Event::Endpoint::Threat::Dismissed"; id="cXXX-686c-XXX-5XXc-aa51b2a7b9fe"; name="Malware locally cleared: 'JS/FakeAle-SG' at 'C:\XXXXXXta\Local\GooglXXX\User Data\Default\Cache\f_001d18'";

In certain scenarios i would get threat dismissed logs directly  for certain signature on host even without getting the detected logs. Can someone shed light on this scenario

Summing up my understanding here

If the malware has initiated  on host and sophos detects it it would come under the  category threat detected

If the malware was cleaned up it would come under the  category Threat::CleanedUp

If the malware was not  cleaned up it would come under the  category Threat::CleanedUp failed

If the malware not initiated and sophos able to clear it  will it come under the Threat::Dismissed . is this assumption right?

Please help