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TSPY_URSNIF.BZ

October 09, 2012
 Analysis by: Jed Valderama
 ALIASES:

TrojanSpy:Win32/Ursnif.gen!K

 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

Infection Channel:

Dropped by other malware, Downloaded from the Internet

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.

It attempts to steal sensitive online banking information, such as user names and passwords. This routine risks the exposure of the user's account information, which may then lead to the unauthorized use of the stolen data.

It requires its main component to successfully perform its intended routine.

  TECHNICAL DETAILS

File Size:

86,016 bytes

File Type:

DLL

Memory Resident:

No

Initial Samples Received Date:

10 Jul 2012

Payload:

Downloads files, Compromises system security, Connects to URLs/IPs

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.

Information Theft

This spyware attempts to steal sensitive online banking information, such as user names and passwords. This routine risks the exposure of the user's account information, which may then lead to the unauthorized use of the stolen data.

Other Details

Based on analysis of the codes, it has the following capabilities:

  • Archive and upload file(s)
  • Capture screenshot
  • Clear cookies
  • Download a configuration file
  • Download file(s)
  • Open a SOCKS proxy
  • Reboot the affected system
  • Steal certificates
  • Steal cookies
  • Update configuration file
  • Upload a log file which contains stolen information

It requires its main component to successfully perform its intended routine.

NOTES:

It attempts to download a configuration file which may contain a list of targeted websites from which it will steal information. It may also contain information about the server it connects to.

It monitors the following browser-related processes in order to accomplish the aforementioned routine:

  • iexplore.exe
  • firefox.exe
  • chrome.exe
  • opera.exe
  • safari.exe
  • explorer.exe

  SOLUTION

Minimum Scan Engine:

9.200

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_URSNIF.BZ

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

Search and delete files detected as TSPY_URSNIF.BZ

[ 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.

Step 5

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