What is it about? Simple, the poison ivy trojan wrapped in a password protected ZIP file so it can get past filtering. Symantec has an excellent analysis of these attacks in a paper titled: The Nitro Attacks: Stealing Secrets from the Chemical Industry by Eric Chien and Gavin O’Gorman. You can read the entire paper here.
“The most recent attacks focusing on the chemical industry are using password-protected 7zip files which, when extracted, contain a self-extracting executable. The password to extract the 7zip file is included in the email. This extra stage is used to prevent automated systems from extracting the self-extracting archive.”
Packing malicious code into ZIP file and including the password in the body of the email is fairly common spear phishing technique that has been going on for quite some time. In fact, we have specific training about this tactic available at PhishMe. Here is a small snip from our training about password protected ZIP files:
Future customers: You could be using our award winning solution right now to train people about this exact tactic.