seanthegeek.net – InfoSec, Sci-fi, and other geekery

Emotet malspam campaign exploits reliance on magic for file type detection

January 26, 2019
Sean Whalen

Emotet is a Trojan designed to steal banking information. It is frequently spread by sending phishing emails to governments, banks, healthcare organizations, and schools. The phishing emails will often claim to be an invoice, with a malicious Microsoft Word document attached. The email may often appear to be from a…

How to inspect the certificate of a mail server over a CLI

If you ever need to inspect the certificate of a remote SMTP server, you can use the openssl CLI tool.…

November 29, 2018

Demystifying DMARC: A guide to preventing email spoofing

DMARC can stop spoofed spam and phishing from reaching you and your customers, protecting your information security and your brand.…

June 15, 2018

How to compile and install FFmpeg 4.0 on Debian/Ubuntu

Here's how to build and install FFmpeg 4.0 from source with all the bells and whistles (i.e codec support).  We'll…

June 5, 2018

Stop the ADA Education and Reform Act

The Americans with Disabilities Act (ADA) of 1990 (amended in 2008) is a bipartisan law that sets accessibility standards that…

February 10, 2018

Lessons Learned from the US Federal Government’s Ongoing Deployment of SPF and DMARC

SPF and DMARC are standards that describe how the origins of email messages should be verified, to prevent email spoofing.…

January 1, 2018

How to install YARA and write basic YARA rules to identify malware

YARA is described as "The pattern matching Swiss knife for malware researchers (and everyone else)". Think of it as like…

June 15, 2017

WannaCry ransomware analysis: Samples date back to at least early February 2017

The WannaCry ransomware worm has spread panic and destruction as it infects hundreds of thousands of systems around the world;…

May 18, 2017

Google Pixel phones can be unlocked with a recording of a trusted voice by default

The headline feature of the new Google Pixel phones is deep integration between the operating system and the Google Assistant…

October 23, 2016

Android 7.1 adds native android visual voicemail support for Verizon

After upgrading my Nexus 6P on Verizon to the Android 7.1.1 beta, I discovered that Visual Voicemail in the native…

October 20, 2016