PE_PATNOTE.A

This malware was discovered on January 2014 as a file infector that not only infects all executable files on an affected system, but also drops a ZBOT variant. Users affected by this malware may find their personal information stolen and their online banking accoutns compromised.

To get a one-glance comprehensive view of the behavior of this File infector, refer to the Threat Diagram shown below.

This File infector appends its codes to target files.

It executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.

File Infection

This File infector infects the following file types:

• EXE

It appends its codes to target files.

Propagation

This File infector infects files of the following file type(s) in network shares, ensuring its propagation across the network:

• EXE

Dropping Routine

This File infector drops the following files:

• %User Temp%\notepat.exe - Detected as TSPY_ZBOT.PNR

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, and 8.)

It executes the dropped file. As a result, malicious routines of the dropped file are exhibited on the affected system.

NOTES:

This malware searches for .EXE files in removable drives to infect which also serves as its propagation technique.