Outlook.exe categorized as trojan due to its connection outbound and modification on registry keys.

Question

Outlook.exe performed all these actions, and due to it, it is shown as Trojan. And As far as it seems all the outbound connection has been to Microsoft. And I would like to know if this action is normal or should I be concered and if so what action should I take. 
 Here is the hash of the root cause [ outlook.exe ]. 
 SHA256:

ee343bf28cb3269dc154ce0acde4ecbf46f415c48b6dc9a344c5c9c930bd09e5

Actions performed by this artifact:

200 DNS lookups 
 200 File deletions 
 200 File reads 
 200 File writes 
 200 IP connections 
 200 Registry creations 
 200 Registry deletions 
 200 Registry value sets 
 200 URL accesses 
 92 Registry value deletions

FormerMember · Accepted Answer

So, you really don't need to worry about Outlook. The malicious element was the email. Has that been removed? As for the other elements - the endpoint detected the action and stopped it - that is the only way you get a Threat Case. So, what you want to do now is go take a look at the items touched before the actions were stopped. Were there any network calls to other machines in your environment - if yes, are those machines protected by Sophos? Where there any calls to external resources that could be CnC servers? If yes, what happened at your firewall? Were any critical system or data files touched? If yes, verify the contents and signatures.

I would also suggest you do a full system scan with the Sophos Endpoint on the reporting machine - just to make sure there isn't any lingering bits sitting around.

FormerMember · Answer

As QC says, we need to clarify if this is a Threat Case in Sophos Central. If it is, and you are seeing Outlook as the root node in the case - then your infection vector was an email and someone clicked on it and it did the malicious actions.

If this isn't a Threat Case in your Central Dashboard - please post a screenshot of what you are referencing.

Outlook.exe categorized as trojan due to its connection outbound and modification on registry keys.

Outlook.exe performed all these actions, and due to it, it is shown as Trojan. And As far as it seems all the outbound connection has been to Microsoft. And I would like to know if this action is normal or should I be concered and if so what action should I take.

Here is the hash of the root cause [ outlook.exe ].

SHA256:

Actions performed by this artifact:

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