TROJ_STARTP.SMHS
Trojan:Win32/Startpage.AEM (Microsoft); Trojan.ADH (Symantec); ARC:NSIS, [data0001]:Trojan-Dropper.Win32.NSIS.wa, [data0003]:Trojan.BAT.StartPage.jf, [data0003]:Tr (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt)
Windows 2000, XP, Server 2003
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.
TECHNICAL DETAILS
1,463,673 bytes
EXE
No
02 Oct 2011
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.
Installation
This Trojan creates the following folders:
- %System Root%\DOCUME~1
- %System Root%\DOCUME~1\ADMINI~1
- %User Profile%\LOCALS~1
- %User Temp%\nsl2.tmp
- D:\zations
- %Program Files%\00011014
- %Program Files%\date0014
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %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.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.. %Program Files% is the default Program Files folder, usually C:\Program Files.)
Other System Modifications
This Trojan deletes the following files:
- %User Temp%\nsl1.tmp
- %User Temp%\nsl2.tmp
- %User Temp%\nsl2.tmp\ns3.tmp
- %Program Files%\00011014\caihong.exe
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.. %Program Files% is the default Program Files folder, usually C:\Program Files.)
Dropping Routine
This Trojan drops the following files:
- %User Temp%\nsl2.tmp\System.dll
- D:\zations\1.bat
- D:\zations\2.bat
- %Program Files%\00011014\abcd.exe
- %Program Files%\00011014\360P2SP.wma
- %Program Files%\00011014\bat.txt
- %Program Files%\date0014\IeUpdate.exe
- %Program Files%\date0014\IeUpdate.ini
- %Program Files%\date0014\oem.ini
- %Program Files%\date0014\dailytips.ini
- %Desktop%\ÊÀ½çÖ®´° ä¯ÀÀÆ÷.lnk
- %User Profile%\Quick Launch\ÊÀ½çÖ®´° ä¯ÀÀÆ÷.lnk
- %User Temp%\nsl2.tmp\nsExec.dll
- %User Temp%\nsl2.tmp\NSISdl.dll
- %Program Files%\00011014\caihong.exe
- %Program Files%\00011014\kugou_2355.exe
- %User Temp%\nsl2.tmp\ns3.tmp
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.. %Program Files% is the default Program Files folder, usually C:\Program Files.. %Desktop% is the current user's desktop, which is usually C:\Windows\Profiles\{user name}\Desktop on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Desktop on Windows NT, and C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003.. %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.)
This report is generated via an automated analysis system.
SOLUTION
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 folders
- %System Root%\DOCUME~1
- %System Root%\DOCUME~1\ADMINI~1
- %User Profile%\LOCALS~1
- %User Temp%\nsl2.tmp
- D:\zations
- %Program Files%\00011014
- %Program Files%\date0014
Step 3
Search and delete these files
- %User Temp%\nsl2.tmp\System.dll
- D:\zations\1.bat
- D:\zations\2.bat
- %Program Files%\00011014\abcd.exe
- %Program Files%\00011014\360P2SP.wma
- %Program Files%\00011014\bat.txt
- %Program Files%\date0014\IeUpdate.exe
- %Program Files%\date0014\IeUpdate.ini
- %Program Files%\date0014\oem.ini
- %Program Files%\date0014\dailytips.ini
- %Desktop%\ÊÀ½çÖ®´° ä¯ÀÀÆ÷.lnk
- %User Profile%\Quick Launch\ÊÀ½çÖ®´° ä¯ÀÀÆ÷.lnk
- %User Temp%\nsl2.tmp\nsExec.dll
- %User Temp%\nsl2.tmp\NSISdl.dll
- %Program Files%\00011014\caihong.exe
- %Program Files%\00011014\kugou_2355.exe
- %User Temp%\nsl2.tmp\ns3.tmp
Step 4
Scan your computer with your Trend Micro product to delete files detected as TROJ_STARTP.SMHS. 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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