WORM_AUTORUN.HGS
Trojan:Win32/Startpage.gen!A (Microsoft); Suspect-BQ!D26424A08C00 (McAfee); Trojan.Gen (Symantec); Trojan.Win32.Cosmu.ajs, Trojan.Win32.Cosmu.ajs (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Win32.Worm.VB.NYA (FSecure)
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Worm
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This worm 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
73,728 bytes
EXE
Yes
14 Jun 2012
Arrival Details
This worm arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Autostart Technique
This worm adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Ahead Nero = "%System%\System.exe"
Other System Modifications
This worm adds the following registry keys:
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{853FB6B1-8FFF-448D-83A4-516B8E59BF25}
HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Internet Explorer\Search
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes
DefaultScope = "{853FB6B1-8FFF-448D-83A4-516B8E59BF25}"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes
Version = "1"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{853FB6B1-8FFF-448D-83A4-516B8E59BF25}
DisplayName = "Google"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{853FB6B1-8FFF-448D-83A4-516B8E59BF25}
URL = "http://universo.{BLOCKED}x.com/campos?campo={searchTerms}"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Search Bar = "http://universo.{BLOCKED}x.com/campos?campo={searchTerms}"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Search
SearchAssistant = "http://universo.{BLOCKED}x.com"
It modifies the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Search Page = "http://universo.{BLOCKED}x.com"
(Note: The default value data of the said registry entry is http://www.microsoft.com/isapi/redir.dll?prd=ie&ar=iesearch.)
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Start Page = "http://universo.{BLOCKED}x.com"
(Note: The default value data of the said registry entry is http://www.microsoft.com/isapi/redir.dll?prd=ie&pver=6&ar=msnhome.)
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
Restart in Safe Mode
Step 3
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\Microsoft\Internet Explorer
- SearchScopes
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes
- {853FB6B1-8FFF-448D-83A4-516B8E59BF25}
- In HKEY_CURRENT_USER\SOFTWARE\Microsoft\Internet Explorer
- Search
Step 4
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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- Ahead Nero = "%System%\System.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes
- DefaultScope = "{853FB6B1-8FFF-448D-83A4-516B8E59BF25}"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes
- Version = "1"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes\{853FB6B1-8FFF-448D-83A4-516B8E59BF25}
- DisplayName = "Google"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes\{853FB6B1-8FFF-448D-83A4-516B8E59BF25}
- URL = "http://universo.{BLOCKED}x.com/campos?campo={searchTerms}"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
- Search Bar = "http://universo.{BLOCKED}x.com/campos?campo={searchTerms}"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Search
- SearchAssistant = "http://universo.{BLOCKED}x.com"
Step 5
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_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
- From: Search Page = "http://universo.{BLOCKED}x.com"
To: Search Page = ""http://www.microsoft.com/isapi/redir.dll?prd=ie&ar=iesearch""
- From: Search Page = "http://universo.{BLOCKED}x.com"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
- From: Start Page = "http://universo.{BLOCKED}x.com"
To: Start Page = ""http://www.microsoft.com/isapi/redir.dll?prd=ie&pver=6&ar=msnhome""
- From: Start Page = "http://universo.{BLOCKED}x.com"
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as WORM_AUTORUN.HGS. 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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