Category: SANS Full Feed

I’ve been doing Unix/Linux IR and Forensics for a long time. I logged into a Unix system for the first time in 1983. That’s one of the reasons I love teaching FOR577[1], because I have stories that go back to before some of my students were even born that are still relevant today. In recent…

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While reviewing malicious messages that were delivered to our handler inbox over the past few days, I noticed that the “subject” of one phishing e-mail looked quite strange when displayed in the Outlook message list… As you can see, once the message was open, the subject was displayed as a normal, readable text. This suggested…

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I was intrigued when Johannes talked about malware that uses BASE64 over DNS to communicate. Take a DNS request like this: label1.label2.tld. Labels in a request like this can only be composed with letters (not case-sensitive), digits and a hyphen character (-). While BASE64 is encoded with letters (uppercase and lowercase), digits and special characters +…

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When I have a binary file to analyze, I often use tools like 010 Editor or format-bytes.py (a tool I develop). Sometimes I also use Kaitai Struct. What I did not know, is that Kaitai Struct also has a WebIDE, that allows you to parse all kinds of binary file formats in your browser. I…

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Over the past two months, my outlook account has been receiving phishing email regarding cloud storage payments, mostly in French and some English with the usual warning such as the account is about to be locked, space is full, loss of data, refused payment, expired payment method, etc. Some of the emails have some typical…

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