➔
search
✕

TSPY_BANKER.CNG

September 03, 2012
 Analysis by: Mark Joseph Manahan
 ALIASES:

VirTool:Win32/CeeInject.gen!HG (Microsoft), Trojan.Gen (Symantec), Generic PWS.zv (McAfee)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW


This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size:

116,059 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

21 Aug 2012

Arrival Details

This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This spyware drops the following files:

  • %User Profile%\Application Data\{random folder name}\{random folder name}.srv

(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

It drops the following copies of itself into the affected system:

  • %User Profile%\Application Data\KB{random numbers}.exe

(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

It creates the following folders:

  • %User Profile%\Application Data\{random folder name}

(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
KB{random numbers}.exe = "%User Profile%\Application Data\KB{random numbers}.exe"

Other System Modifications

This spyware adds the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\{Random Key Name 1}

HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\{Random Key Name 2}

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
GlobalUserOffline = "0"

Other Details

This spyware connects to the following possibly malicious URL:

  • http://{BLOCKED}.{BLOCKED}.180.54/mx5/A/in/cp.php
  • http://{BLOCKED}.{BLOCKED}.252.26/mx5/A/in/
  • http://{BLOCKED}.{BLOCKED}.147.35/mx5/A/in/
  • http://{BLOCKED}.{BLOCKED}.194.242/mx5/A/in/
  • http://{BLOCKED}.{BLOCKED}.23.100/mx5/A/in/
  • http://{BLOCKED}.{BLOCKED}.253.106/mx5/A/in/
  • http://{BLOCKED}.{BLOCKED}.5.140/mx5/A/in/
  • http://{BLOCKED}.{BLOCKED}.206.179/mx5/A/in/
  • http://{BLOCKED}.{BLOCKED}.189.212/mx5/A/in/
  • http://{BLOCKED}.{BLOCKED}.179.185/mx5/A/in/
  • http://{BLOCKED}.{BLOCKED}.134.23/mx5/A/in/
  • http://{BLOCKED}.{BLOCKED}.41.155/mx5/A/in/
  • http://{BLOCKED}.{BLOCKED}.199.100/mx5/A/in/

  SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

9.340.01

FIRST VSAPI PATTERN DATE:

21 Aug 2012

VSAPI OPR PATTERN File:

9.341.00

VSAPI OPR PATTERN Date:

22 Aug 2012

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

Scan your computer with your Trend Micro product and note files detected as TSPY_BANKER.CNG

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

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
    • KB{random numbers}.exe = "%User Profile%\Application Data\KB{random numbers}.exe"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
    • GlobalUserOffline = "0"

Step 5

Search and delete this folder

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • User Profile%\Application Data\{random folder name}

Step 6

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_BANKER.CNG. 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.

NOTES:

The created registry keys HKEY_CURRENT_USER\Software\Microsoft\Windows NT\{Random Key Name} cannot be identified by the users since there are no reference values in the created key. The only way it can be identified is by comparing the present keys with a backup if the users have one. Note that the key, {Random Key Name} need not to be deleted since it won't cause the user system any harm.


Did this description help? Tell us how we did.