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TROJ_STARTP.SMIS

October 12, 2012
 ALIASES:

Trojan:Win32/Startpage.WP (Microsoft); BackDoor-EQJ (McAfee); Trojan.Startpage (Symantec); Trojan.Win32.Agent.eyjl (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Dropped:Trojan.Script.430240 (FSecure)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


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

It deletes the initially executed copy of itself.

  TECHNICAL DETAILS

File Size:

122,880 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

13 Jan 2012

Arrival Details

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

Other System Modifications

This Trojan deletes the following files:

  • %Windows%\ff.bat

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

Dropping Routine

This Trojan drops the following files:

  • %Windows%\snss.lnk
  • %Start Menu%\Programs\¦(¦»\snss.lnk
  • %Windows%\snss.exe

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

Other Details

This Trojan deletes the initially executed copy of itself

This report is generated via an automated analysis system.

  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

Search and delete these files

[ Learn More ]
There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %Windows%\snss.lnk
  • %Start Menu%\Programs\¦(¦»\snss.lnk
  • %Windows%\snss.exe

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_STARTP.SMIS. 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.

Step 4

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again. %Windows%\ff.bat


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