Lennaert Oudshoorn

Researcher and CSIRT handler at DIVD. He studies Digital Forensics at the University of Applied Sciences in Leiden.

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Articles / cases / cves

Blog posts

• 29 March 2021 - DIVD publishes it’s first annual report (in Dutch).

CSIRT Cases

• DIVD-2021-00012 - Warehouse Botnet
• DIVD-2021-00011 - Kaseya VSA Limited Disclosure
• DIVD-2021-00004 - Gelekte phishing gegevens / Leaked phishing credentials
• DIVD-2021-00002 - Kaseya VSA
• DIVD-2021-00001 - Microsoft on-prem Exchange Servers
• DIVD-2020-00014 - SolarWinds Orion
• DIVD-2020-00012 - 49 000 vulnerable Fortinet VPN devices
• DIVD-2020-00009 - Pulse Secure VPN enterprise Leak
• DIVD-2020-00008 - 313 000 Wordpress sites scanned
• DIVD-2020-00007 - Citrix ShareFile

CSIRT blog posts

• 06 July 2021 - Kaseya Case Update 3
• 03 July 2021 - Kaseya Case Update
• 02 July 2021 - Kaseya VSA Advisory
• 09 May 2021 - Phishing slachtoffer notificatie / Victim notification phishing
• 08 March 2021 - Exchange Zero-day IoC detectie script / Exchange Zero-day detection script
• 30 December 2020 - SolarWinds Orion API authentication bypass
• 17 December 2020 - Het Security Meldpunt wordt DIVD CSIRT / This site will become DIVD CSIRT
• 27 November 2020 - Wordpress binnen het .nl domein geïndexeerd / Wordpress in .nl space indexed
• 15 November 2020 - Lijst met 49 000 kwetsbare Fortinet VPNs / List of 49 000 vulnerable Fortinet VPNs