Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.

xpd



Chief Trash Bandit
9055 posts

Uber Geek
+1 received by user: 1406

Mod Emeritus
Trusted
Lifetime subscriber

Topic # 239298 11-Jul-2018 10:02
Send private message

User on Office 365 for email, gets spammed with 7000+ emails – the usual porn, drugs stuff.  Most went into the Junk folder. User deletes them all, then after approx. 4+ days we get requested to investigate what happened. When checking the Office 365 admin control panel and the incoming email stats, theres no sign of those 7000 emails ever hitting Office 365.  User does not have multiple accounts or anything setup, just the single O365 email account.

 

I tried a recover deleted items, and only found a single spammy email.

 

So where the hell did these emails come from, and/or why did O365 not see them in its stats as incoming email ? Any ideas or things to check ? Users systems have been checked over and virus/malware free.

 

 





XPD / Gavin / DemiseNZ

 

For Free Games, Geekiness and Reviews, visit :

 

Home Of The Overrated Raccoons

 

Battlenet : XPD#11535    Origin/Steam/Epic/Uplay : xpdnz


Create new topic
2456 posts

Uber Geek
+1 received by user: 728

Trusted
Lifetime subscriber

  Reply # 2054278 11-Jul-2018 12:32
Send private message

Wow...  that's an odd one.  SOmone could have dragged and dropped the messages into his folders (unlikely) but that doesn't explain why they aren't in the dumpster.  It's possible that Mickeysoft had a failure and then cleaned it up but that's not necessarily likely either.

 

365 Audit logs are off by default from memory and only kept for 7 days, but maybe have a look in case I'm wrong.  I think these are in the Security & Compliance area.





"4 wheels move the body.  2 wheels move the soul."

“Don't believe anything you read on the net. Except this. Well, including this, I suppose.” Douglas Adams

358 posts

Ultimate Geek
+1 received by user: 18


  Reply # 2054330 11-Jul-2018 13:39
Send private message

Dynamic:

 

Wow...  that's an odd one.  SOmone could have dragged and dropped the messages into his folders (unlikely) but that doesn't explain why they aren't in the dumpster.  It's possible that Mickeysoft had a failure and then cleaned it up but that's not necessarily likely either.

 

365 Audit logs are off by default from memory and only kept for 7 days, but maybe have a look in case I'm wrong.  I think these are in the Security & Compliance area.

 

 

 

 

Pretty sure they are off by default, but they are kept longer than 7 days. Looking at mine they go back several months until the day we enabled auditing.

 

 

 

If they have retention policy enabled Security & Compliance you can use eDiscovery to dump the email box out as a csv, then look for the folder "\Recoverable Items\DiscoveryHolds". Depending on the policy config you can find a copy of hard deleted emails in here.


721 posts

Ultimate Geek
+1 received by user: 298

Subscriber

  Reply # 2054333 11-Jul-2018 13:47
Send private message

If the messages were shift-deleted directly in the Junk container they wont be recoverable using recover deleted items on the deleted items container. Use MFC-Mapi (or 'dumpsteralwayson' registry key if it still works) to try and recover the deleted items in Junk. Consider a retention policy or litigation hold for more control in future. Are you using the exchange message trace function to search for them?








Go Hawks!
889 posts

Ultimate Geek
+1 received by user: 53

Trusted
Subscriber

  Reply # 2054491 11-Jul-2018 18:21
Send private message

Just for confirmation, what was the mail client in use?  Was it Outlook on the Web, or the Outlook client?

 

I'll do a couple of checks in the next couple of hours, but I'm just wondering if the emails were "bcc'd" and thus not showing in the audits?

 

 


Create new topic

Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.