Hot on the heels of the previous CyberDefenders Challenge Solution comes this noisy installment which solves their Acoustic challenge. You can find the source Rmd on GitHub, but I’m also testing the limits of WP’s markdown rendering and putting it in-stream as well. No longer book expository this time since much of the setup/explanatory bits… Continue reading
Post Category → Cybersecurity
Packet Maze: Solving a CyberDefenders PCAP Puzzle with R, Zeek, and tshark
It was a rainy weekend in southern Maine and I really didn’t feel like doing chores, so I was skimming through RSS feeds and noticed a link to a PacketMaze challenge in the latest This Week In 4n6. Since it’s also been a while since I’ve done any serious content delivery (on the personal side,… Continue reading
Feedly Mini Extension Removed From Chrome Store Due To “Malware”
On or about Friday evening (May 7, 2021) Edge notified me that the Feedly Mini extension (one of the only extensions I use as extensions are dangerous things) was remove from the store due to “malware”. Feedly is used by many newshounds, and with 2021 being a very bad year when it comes to supply-chain… Continue reading
Help Your Mac Stand Between The Darkness And The Light with GreyWatch
Greynoise helps security teams focus on potential threats by reducing the noise from logs, alerts, and SIEMs. They constantly watch for badly behaving internet hosts, keep track of the benign ones, and use this research to classify IP addresses. Teams can use these classifications to only focus on things that (potentially) matter. They also have… Continue reading
Brimming With Possibilities: Query zqd & Mine Logs with zq from R
Brim Security maintains a free, Electron-based desktop GUI for exploration of PCAPs and select cybersecurity logs: along with a broad ecosystem of tools which can be used independently of the GUI. The standalone or embedded zqd server, as well as the zq command line utility let analysts run ZQL (a domain-specific query language) queries on… Continue reading
A Look at PAN-OS Versions with a Bit of R
The incredibly talented folks over at Bishop Fox were quite generous this week, providing a scanner for figuring out PAN-OS GlobalProtect versions. I’ve been using their decoding technique and date-based fingerprint table to keep an eye on patch status (over at $DAYJOB we help customers, organizations, and national cybersecurity centers get ahead of issues as… Continue reading
BIMI Up, Scotty! A look at Brand Indicators for Message Identification (BIMI) Adoption with R and the Alexa Top 1m
It seems that the need for MX, DKIM, SPF, and DMARC records for modern email setups were just not enough acronyms (and setup tasks) for some folks, resulting in the creation of yet-another-acronym — BIMI, or, Brand Indicators for Message Identification. The goal of BIMI is to “provide a mechanism for mail senders to publish… Continue reading
Davos 2020 World Economic Forum 2020 Global Risk Report Cyber Cliffs Notes
Each year the World Economic Forum releases their Global Risk Report around the time of the annual Davos conference. This year’s report is out and below are notes on the “cyber” content to help others speed-read through those sections (in the event you don’t read the whole thing). Their expert panel is far from infallible,… Continue reading