Summary

Shash consists of a downloader and a data stealing trojan. The downloader was spread in multiple e-mail messages on 7th of November 2003. When activated, it downloads and runs the executable file that is a data stealing trojan.

Additional Details

The downloader was distributed in multiple e-mails on 7th of November, 2003. The file name of the downloader is:

 photo0001.asp.scr

When the downloader is run by a user, it downloads and activates an executable file from an account on phpwebhosting.com server.

The downloaded file is a data stealing trojan based on the code that can be found in Mimail.C worm. When activated, the trojan copies itself as NETSPACE32.EXE file to Windows folder and creates a startup key for its file in the Registry:

 [HKLM\Software\Microsoft\Windows\CurrentVersion\Run]
 "NetSpace32" = "%windir%\netspace32.exe"

where %windir% is a Windows folder.

The trojan stays in Windows memory and monitors open application windows. When a certain window is found, the trojan gets certain information from it, saves it to C:\TMP2993.TMP file and then sends this file to 2 e-mail addresses that are hardcoded in the trojan's body.



Detection

Detection in F-Secure Anti-Virus was published on November 10th, 2003 in update:

[FSAV_Database_Version]
Version=2003-11-10_03

Technical Details: Alexey Podrezov, November 7th, 2003;