TSPY_PAPRAS.KIT

 Analysis by: jasperm

 PLATFORM:

Windows 2000, XP, Server 2003

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW


This spyware may be dropped by other malware. It may be unknowingly downloaded by a user while visiting malicious websites.

It opens a random port to allow a remote user to connect to the affected system. Once a successful connection is established, the remote user executes commands on the affected system.

  TECHNICAL DETAILS

Ports:

Random

File Size:

66,048 bytes

File Type:

PE

Memory Resident:

Yes

Initial Samples Received Date:

15 Sep 2010

Payload:

Compromises system security

Arrival Details

This spyware may be dropped by other malware.

It may be unknowingly downloaded by a user while visiting malicious websites.

Installation

This spyware drops the following copies of itself into the affected system:

  • %Windows%\essledv.exe

(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)

Autostart Technique

This spyware adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER
ttool = %Windows%\\essledv.exe

Other System Modifications

This spyware adds the following registry entries as part of its installation routine:

HKEY_CURRENT_USER
k1 = {DWORD value}

HKEY_CURRENT_USER
k2 = {DWORD value}

HKEY_CURRENT_USER
version = 20

HKEY_CURRENT_USER
RF = 1

It modifies the following registry key(s)/entry(ies) as part of its installation routine:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess
Start = 4

(Note: The default value data of the said registry entry is 2.)

It adds the following registry keys as part of its installation routine:

HKEY_CURRENT_USER

Backdoor Routine

This spyware opens a random port to allow a remote user to connect to the affected system. Once a successful connection is established, the remote user executes commands on the affected system.

Drop Points

Stolen information is uploaded to the following websites:

  • http://{BLOCKED}.{BLOCKED}.94.131

Other Details

This spyware does the following:

  • Hooks the following APIs to steal user information:
    • CreateProcessW
    • CreateProcessA
    • InternetCloseHandle
    • HttpSendRequestA
    • InternetReadFile
    • InternetQueryDataAvailable
    • InternetReadFileExA
    • InternetReadFileExW
    • HttpSendRequestW
  • Sniffs for the following information:
    • FTP credentials
    • POP3 credentials
    • IMAP credentials
    • ICQ credentials
    • Information entered in forms
  • Performs the following commands received from a remote malicious user:
    • Get cookies
    • Download and execute other files
    • Reboot system
    • Take screenshots
    • Check running processes

  SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

7.467.80

FIRST VSAPI PATTERN DATE:

16 Sep 2010

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Identify and terminate files detected as TSPY_PAPRAS.KIT

[ Learn More ]
  1. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  2. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 3

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • ttool = %Windows%\essledv.exe
  • In HKEY_CURRENT_USER\Software\Microsoft\InetData
    • k1 = {DWORD value}
  • In HKEY_CURRENT_USER\Software\Microsoft\InetData
    • k2 = {DWORD value}
  • In HKEY_CURRENT_USER\Software\Microsoft\InetData
    • version = 20
  • In HKEY_CURRENT_USER\Software\Microsoft\InetData
    • RF = 1

Step 4

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry. Before you could do this, you must restart in Safe Mode. For instructions on how to do this, you may refer to this page If the preceding step requires you to restart in safe mode, you may proceed to edit the system registry.

  • In HKEY_CURRENT_USER\Software\Microsoft
    • InetData

Step 5

Restore this modified registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess
    • From: Start = 4
      To: Start = 2

Step 6

Scan your computer with your Trend Micro product to delete files detected as TSPY_PAPRAS.KIT. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.


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