HackBlue

Labs / Identity and access

MFA fatigue triage queue

A night of MFA push events for five users. Compare each burst with the user’s usual address and decide who gets escalated and what happens next.

  • Interactive lab
  • Beginner
  • 5 steps
  • 0 of 5 solved

Goal

You are on the morning shift. The identity provider exported every MFA push notification since midnight: 27 events across five users.

Filter the queue by user, compare each burst with that user’s usual address and device, and mark every user as benign or escalate. A push is only sent after the correct password is entered.

Users

  • ana1 pushes · 0 denied · 0 timed out · 1 approvedUsual: Lisbon, PT, 198.51.100.14
  • ben14 pushes · 13 denied · 0 timed out · 1 approvedUsual: Leeds, GB, 198.51.100.40
  • chen6 pushes · 4 denied · 2 timed out · 0 approvedUsual: Toronto, CA, 198.51.100.71
  • dana4 pushes · 0 denied · 3 timed out · 1 approvedUsual: Denver, US, 198.51.100.92
  • eli2 pushes · 1 denied · 0 timed out · 1 approvedUsual: Oslo, NO, 198.51.100.120

0 of 5 users marked.

Push events
Time (UTC)UserIP and locationAppResult
02:31:05ben203.0.113.77 Lagos, NGOutlook Webdenied
02:31:43ben203.0.113.77 Lagos, NGOutlook Webdenied
02:32:21ben203.0.113.77 Lagos, NGOutlook Webdenied
02:32:59ben203.0.113.77 Lagos, NGOutlook Webdenied
02:33:37ben203.0.113.77 Lagos, NGOutlook Webdenied
02:34:15ben203.0.113.77 Lagos, NGOutlook Webdenied
02:34:53ben203.0.113.77 Lagos, NGOutlook Webdenied
02:35:31ben203.0.113.77 Lagos, NGOutlook Webdenied
02:36:09ben203.0.113.77 Lagos, NGOutlook Webdenied
02:36:47ben203.0.113.77 Lagos, NGOutlook Webdenied
02:37:25ben203.0.113.77 Lagos, NGOutlook Webdenied
02:38:03ben203.0.113.77 Lagos, NGOutlook Webdenied
02:38:41ben203.0.113.77 Lagos, NGOutlook Webdenied
02:39:19ben203.0.113.77 Lagos, NGOutlook Webapproved
03:12:40chen192.0.2.188 Bucharest, ROOutlook Webdenied
03:13:35chen192.0.2.188 Bucharest, ROOutlook Webtimeout
03:14:30chen192.0.2.188 Bucharest, ROOutlook Webdenied
03:15:25chen192.0.2.188 Bucharest, ROOutlook Webdenied
03:16:20chen192.0.2.188 Bucharest, ROOutlook Webtimeout
03:17:15chen192.0.2.188 Bucharest, ROOutlook Webdenied
06:20:11eli198.51.100.120 Oslo, NOVPNdenied
06:20:49eli198.51.100.120 Oslo, NOVPNapproved
07:45:02ana198.51.100.14 Lisbon, PTTeamsapproved
08:58:10dana198.51.100.92 Denver, USOutlook Webtimeout
08:59:20dana198.51.100.92 Denver, USOutlook Webtimeout
09:00:30dana198.51.100.92 Denver, USOutlook Webtimeout
09:04:33dana198.51.100.92 Denver, USOutlook Webapproved

Steps

  1. 01Mark each of the five users as benign or escalate.

    Do this in the workbench above. This step completes itself when the condition is met.

  2. 02At what time did ben approve a push from the new address?

  3. 03chen denied every prompt. Why escalate anyway?

  4. 04What is the first response for ben?

  5. 05Which control stops this attack pattern from working at all?