How the SolarWinds Hackers Bypassed Duo’s Multi-Factor Authentication

This is interesting: Toward the end of the second incident that Volexity worked involving Dark Halo, the actor was observed accessing the e-mail account of a user via OWA. This was unexpected for a few reasons, not least of which was the targeted mailbox was protected by MFA. Logs from the Exchan...

Ghost in the shell: Investigating web shell attacks

Recently, an organization in the public sector discovered that one of their internet-facing servers was misconfigured and allowed attackers to upload a web shell, which let the adversaries gain a foothold for further compromise. The organization enlisted the services of Microsoft’s Detection and...

Outlook Web Access Targeted Attack

Attackers aiming for lateral movement inside an enterprise network have done well in the past to target domain controller credentials. Researchers at Cybereason, however, have uncovered a targeted attack in which hackers were able to burrow onto the corporate network and steal thousands of...

Outlook Web anonymous access

It is possible to browse the information of the OWA server by accessing as an anonymous user with the following URL: http://www.example.com/exchange/root.asp?acs=anon After this access, the anonymous user can search for valid users in the OWA server and can enumerate all users by accessing the...