Analysis by: Lord Alfred Remorin
ALIASES:

TrojanSpy:Win32/Ursnif.gen!K (Microsoft), Generic PWS.y!1eg (McAfee), Backdoor.Trojan (Symantec)

 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

This spyware may be dropped by other malware.

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 connects to certain websites to send and receive information. It requires its main component to successfully perform its intended routine.

  TECHNICAL DETAILS

File Size: 86,528 bytes
File Type: DLL
Memory Resident: No
Initial Samples Received Date: 08 Jul 2012
Payload: Downloads files, Connects to URLs/IPs

Arrival Details

This spyware may be dropped by other malware.

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 connects to the following website to send and receive information:

  • {BLOCKED}.{BLOCKED}.56.240
  • {BLOCKED}.{BLOCKED}.146.101
  • {BLOCKED}.{BLOCKED}.214.18
  • {BLOCKED}um.com.tw
  • {BLOCKED}rum.com.tw
  • {BLOCKED}rum.com.tw

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

NOTES:

This spyware attempts to download a configuration file which may contain a list of targeted websites from which it will steal information.

It injects code into running processes to accomplish the aforementioned routine:

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

Injected codes are patched in the following APIs to steal any information passed to hooked APIs:

  • HttpQueryInfoA
  • HttpQueryInfoW
  • HttpSendRequestA
  • HttpSendRequestExA
  • HttpSendRequestExW
  • HttpSendRequestW
  • InternetCloseHandle
  • InternetConnectA
  • InternetConnectW
  • InternetQueryDataAvailable
  • InternetReadFile
  • InternetReadFileExA
  • InternetReadFileExW
  • InternetWriteFile

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 9.244.04
FIRST VSAPI PATTERN DATE: 09 Jul 2012
VSAPI OPR PATTERN File: 9.245.00
VSAPI OPR PATTERN Date: 09 Jul 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_URSNIF.ZGD

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

Search and delete files detected as TSPY_URSNIF.ZGD

[ 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.


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