ISC StormCast for Monday, April 8th 2019

Fake Office 365 Invoices Spread Ransomware
https://isc.sans.edu/forums/diary/Fake+Office+365+Payment+Information+Update/24818/
Malware Hiding in .well-known directory
https://www.zscaler.com/blogs/research/abuse-hidden-well-known-directory-https-sites
Altering CT Images to Manipulate Diagnosis
https://arxiv.org/pdf/1901.03597.pdf
QT Framework RCE Vulnerability
https://www.zerodayinitiative.com/blog/2019/4/3/loading-up-a-pair-of-qt-bugs-detailing-cve-2019-1636-and-cve-2019-6739