PE_GOSYS.A-O
Trojan:Win32/Msposer.A (Microsoft); Swisyn.al (McAfee); W32.Gosys (Symantec); Trojan.Win32.Swisyn.bugf, Trojan.Win32.Swisyn.bugf (Kaspersky); Trojan.Win32.Generic.pak!cobra (Sunbelt); Gen:Variant.Buzy.1750 (FSecure)
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
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
211,815 bytes
EXE
No
15 May 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 adds the following registry keys:
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
Explorer\Process
It adds the following registry entries:
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
Explorer\Process
LO = "1"
This report is generated via an automated analysis system.
SOLUTION
9.200
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Step 2
Delete this registry key
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_CURRENT_USER\Software\VB and VBA Program Settings\Explorer
- Process
Step 3
Delete this 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_CURRENT_USER\Software\VB and VBA Program Settings\Explorer\Process
- LO = "1"
Step 4
Scan your computer with your Trend Micro product to delete files detected as PE_GOSYS.A-O. 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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