A suspicious document has attention due to its recent creation date (06-01-2020) and its title “How Swuleimani’s death will affect India and Pakistan.doc” which is directly related to recent political events between Iran and the USA.
The document is in RTF format, and has an OLE object related with the Equation Editor. During the last years, this OLE objects have been a good indicator that a document may aim to exploit the CVE-2018-0798 vulnerability in order to infect with some kind of malware. This particular document turns out to be one of these examples, and does it by dropping a binary called 8.t. in the “% TEMP%” folder of the user.
After this infection chain, what we get is a DLL executable file with extension “.wll” used for “Word.addin.8” files, that is installed in the path “%APPDATA%\Microsoft\Word\STARTUP” which causes that MSWord at the next application startup to load this “.wll” executable file. This DLL consists in a packed version of a PoisonIvy RAT sample, that after a few seconds makes traffic to the C2 server “126.96.36.199”, through port 443, and in case of error, through port 8080 using HTTP traffic.
Exposure of sensitive information