This Trojan turned out to be the latest example for the malware which focused on stealing useful information rather than demanding ransom from victims. The campaign primarily focuses on corporate and public administration emails.
DanaBot Banking Trojan Gets into Email Spam
In September 2018, ESET researchers noticed that the trojan used web injections against users of an unnamed Italian mail service.
First, DanaBot collects email addresses from the victim’s existing mailboxes and sends all the collected information to the C&C server.
The mail attachment includes ZIP file which contains a decoy PDF document and a malicious VBS file, Once the VBS file executes, it downloads more malware using PowerShell cmd.
This trojan includes a significant amount of junk code including instructions, conditional statements, and loops.
To prevent researchers and automated tools from easily understanding the code’s purpose, the trojan uses Windows API function hashing and encrypted strings.
Researchers said DanaBot uses exactly the same scripts that used in BackSwap trojan including the namings and locations of scripts in the server.
Check out the details about targeted webmail services, list of active C&C servers, targeted domains, IoCs which were shared by ESET.