Classification

Category: Malware

Type: -

Aliases: Stash, Trojan.PSW.Small.e, TrojanDownloader.Win32.Small.bt

Summary


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

Removal


Automatic action

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Technical Details


The downloader was distributed in multiple emails 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 email addresses that are hardcoded in the trojan's body.