SANS ISC

[SANS ISC] Investigating Security Incidents with Passive DNS

I published the following diary on isc.sans.org: “Investigating Security Incidents with Passive DNS“. Sometimes when you need to investigate a security incident or to check for suspicious activity, you become frustrated because the online resource that you’re trying to reach has already been cleaned. We cannot blame system administrators and

SANS ISC

[SANS ISC] Malicious AutoIT script delivered in a self-extracting RAR file

I published the following diary on isc.sans.org: “Malicious AutoIT script delivered in a self-extracting RAR file“. Here is another sample that hit my curiosity. As usual, the infection vector was an email which delivered some HTML code in an attached file called “PO_5634_780.docx.html” (SHA1:d2158494e1b9e0bd85e56e431cbbbba465064f5a). It has a very low VT

SANS ISC

[SANS ISC] Malicious script dropping an executable signed by Avast?

I published the following diary on isc.sans.org: “Malicious script dropping an executable signed by Avast?“. Yesterday, I found an interesting sample that I started to analyze… It reached my spam trap attached to an email in Portuguese with the subject: “Venho por meio desta solicitar orçamento dos produtos” (“I hereby

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