Trojan:W32/Agent.DSJS

Classification

Category:Malware

Type:Trojan

Platform:W32

Aliases:

Trojan:W32/Agent.DSJS

Summary

Trojan:W32/Agent.DSJS installs malicious files onto the infected machine.

Removal

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

Check for the latest database updates
First check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.

Technical Details

Trojan:W32/Agent.DSJS is an installer file that serves as a wrapper for two EXE files:

installer.data.exe
installer.crc32.exe

The installer drops these executables, and deletes them after they have finished execution.

Separately, the installer's main responsibility on execution is to capture a screenshot of the machine and stored the screenshot as "error.jpg".

The purpose is to steal information visible onscreen at the time the screenshot is taken. The stolen details may include the following:

FF stored credentials
IE stored credentials
HTTP authentication passwords
MSN messenger passwords
PC name
Current login username
the local/public IP addresses

These details stolen are not stored in a physical file but may be captured from standard output (i.e., it can retrieve the stolen information when 'installer.XXX.exe' prints the output via the console window).

These details will be sent to "wgewurztraminer@gmail.com" on port 587 with the "error.jpg" as an attachment if the screenshot file is exist on the machine.

Dropped Malware

The file 'installer.crc32.exe' is responsible for retrieving the login/password information stored by Firefox.

The file 'installer.data.exe' steals Internet Explorer (IE) credentials, such as the IE AutoComplete password, HTTP authentication passwords and .Net passport account.

When stealing the IE AutoComplete password, it looks for the following targeted websites: