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391 points kinj28 | 1 comments | | HN request time: 0s | source

Could there be any link between the two events?

Here is what happened:

Some 600 instances were spawned within 3 hours before AWS flagged it off and sent us a health event. There were numerous domains verified and we could see SES quota increase request was made.

We are still investigating the vulnerability at our end. our initial suspect list has 2 suspects. api key or console access where MFA wasn’t enabled.

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timdev2 ◴[] No.45658257[source]
I would normally say that "That must be a coincidence", but I had a client account compromise as well. And it was very strange:

Client was a small org, and two very old IAM accounts had suddenly had recent (yesterday) console log ins and password changes.

I'm investigating the extent of the compromise, but so far it seems all they did was open a ticket to turn on SES production access and increase the daily email limit to 50k.

These were basically dormant IAM users from more than 5 years ago, and it's certainly odd timing that they'd suddenly pop on this particular day.

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tcdent ◴[] No.45659427[source]
Smells like a phishing attack to me.

Receive an email that says AWS is experiencing an outage. Log into your console to view the status, authenticate through a malicious wrapper, and compromise your account security.

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SoftTalker ◴[] No.45659478[source]
Good point. Phishers would certainly take advantage of a widely reported outage to send emails related to "recovering your services."

Even cautious people are more vulnerable to phishing when the message aligns with their expectations and they are under pressure because services are down.

Always, always log in through bookmarked links or typing them manually. Never use a link in an email unless it's in direct response to something you initiated and even then examine it carefully.

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roblabla ◴[] No.45662463[source]
You can also use phishing-resistant login/2FA like passkeys/FIDO keys, where it is available (and I'm pretty sure amazon supports it), to minimize the risk of accidentally login into a phishing website while under pressure.
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1. SoftTalker ◴[] No.45662936[source]
They probably support it but how many accounts have not configured it? I'd bet it's a lot.