Trojan-PSW:W32/Sinowal.CP

Classification

Category:Malware

Type:Trojan-PSW

Platform:W32

Aliases:

Trojan-PSW:W32/Sinowal.CP

Summary

A trojan that steals passwords and other sensitive information. It may also secretly install other malicious programs.

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-PSW:W32/Sinowal.CP drops and loads a password stealing component on the infected system and tries to steal account information from it. It also tries to steal information that is required to access certain online banks' and online payment systems' websites.

Execution

Upon execution, it drops the following files:

%programfiles%\common files\microsoft shared\web folders\ibm[5-digit randrom number].dll - Trojan-PSW.Win32.Sinowal.co
%programfiles%\common files\microsoft shared\web folders\ibm[5-digit randrom number].dll - Trojan-PSW.Win32.Sinowal.co
%windir%\temp\$_2341233.tmp
%windir%\temp\$_2341234.tmp
%windir%\temp\$_2341235.tmp
%windir%\temp\$b17a2e8.tmp

It installs itself as a service and adds this Registry key launch point:

Key:HKLM\System\ControlSet001\Services\gb File:%programfiles%\common files\microsoft shared\web folders\ibm[5-digit randrom number] .dll

The executable file injects the first DLL to the explorer.exe process. It also injects the other DLL to svchost.exe and other running processes.

Activity

This trojan attempts to steal different system and account information from the infected machine. Stolen information may be the following:

IMAP/POP3/SMTP username, passwords, server information from mail clients such as AK-Mail,Thunderbird,TheBat
Bookmarks
email addresses from the Windows Address Book
Passwords and other data stored from FTP clients such as Trellian FTP, WS_FTP, Total Commander, Crystal FTP Pro and GlobalSCAPE

It also monitors web browsers such as Internet Explorer, Firefox, and Mozilla for online banking information upon access to the following banking sites:

banking.raiffeisen.at
bankingportal.naspa.de
cib.ibanking-services.com
ykb.teleweb.com.tr

This trojan may also collect certificates from system certificate storage and export certificate stores found. This is done through the PFXExportCertStore function of CRYPT32.DLL, which exports certificates and associated private keys if available.It may also steal system information, such as IP, port number, operating system and send it along with the other stolen information through a POST command on the following sites: