Threat Description

Stash

Details

Aliases: Stash, Trojan.PSW.Small.e, TrojanDownloader.Win32.Small.bt
Category: Malware
Type:
Platform: W32

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.



Removal



Automatic Disinfection

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.



Technical 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:
Detection Type: PC
Database:



Description Created: Alexey Podrezov, November 7th, 2003


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