TSPY_SINOWAL.GL
PWS-JA (McAfee); Trojan.Anserin (Symantec); Trojan-PSW.Win32.Agent.bu (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan.Pws.Agent.BU (FSecure)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Spyware
Destructiveness: No
Encrypted:
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
4,096 bytes
EXE
Yes
23 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 creates the following folders:
- %System%\..\temp
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
Autostart Technique
This spyware modifies the following registry entries to ensure it automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
Shell = "explorer.exe"
(Note: The default value data of the said registry entry is Explorer.exe.)
Dropping Routine
This spyware drops the following files:
- %Program Files%\Common Files\Microsoft Shared\Web Folders\tmp.tmp
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)
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
Identify and delete files detected as TSPY_SINOWAL.GL using either the Startup Disk or Recovery Console
Step 3
Restore this modified registry value
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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
- From: Shell = "explorer.exe"
To: Shell = ""Explorer.exe""
- From: Shell = "explorer.exe"
Step 4
Search and delete this file
- %Program Files%\Common Files\Microsoft Shared\Web Folders\tmp.tmp
Step 5
Search and delete this folder
- %System%\..\temp
Step 6
Scan your computer with your Trend Micro product to delete files detected as TSPY_SINOWAL.GL. 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.
Did this description help? Tell us how we did.