PE_VIRUT.AE

May 30, 2013

ALIASES:

Virus:Win32/Virut.AA (Microsoft); W32/Virut.gen.a (McAfee); W32.Spybot.Worm (Symantec); Virus.Win32.Virut.aw (Kaspersky); Virus.Win32.Virut.a (v) (Sunbelt); Trojan.Generic.2733620 (FSecure)

PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

OVERALL RISK RATING:

REPORTED INFECTION:

Threat Type: File infector
Destructiveness: No
Encrypted:
In the wild: Yes

OVERVIEW

This file infector 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

File Size:

149,503 bytes

File Type:

EXE

Memory Resident:

Initial Samples Received Date:

22 Apr 2012

Arrival Details

This file infector 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 file infector drops the following copies of itself into the affected system:

%Windows%\Fonts\unwise_.exe

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

Other System Modifications

This file infector adds the following registry keys:

HKEY_LOCAL_MACHINE\Software\Policies\
Microsoft\Windows NT\Windows File Protection

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\MRT

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
msgone = "{malware path and file name}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
intime = "04/21/2012, 02:53 PM"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control
WaitToKillServiceT = "5000"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "3e"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Tcpip\Parameters
MaxUserPort = "fffe"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Tcpip\Parameters
TcpTimedWaitDelay = "1e"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Tcpip\Parameters
StrictTimeWaitSeqCheck = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Tcpip\Parameters
Tcp1323Opts = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Tcpip\Parameters
GlobalMaxTcpWindowSize = "3ebc"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Tcpip\Parameters
EnablePMTUDiscovery = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Tcpip\Parameters
EnablePMTUBHDetect = "0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Tcpip\Parameters
SackOpts = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Tcpip\Parameters
DefaultTTL = "4"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Tcpip\Parameters
TcpMaxDupAcks = "2"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Tcpip\Parameters
LargeBufferSize = "c8"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Tcpip\Parameters
AllowUserRawAccess = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Tcpip\Parameters
TcpNumConnections = "fffffe"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\AFD\Parameters
DisableRawSecurity = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows\WindowsUpdate
DoNotAllowXPSP2 = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
MaxConnectionsPer1_0Server = "fffe"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
MaxConnectionsPerServer = "fffe"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\parameters
SizReqBuf = "4"

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows NT\Windows File Protection
SFCDisable = "ffffff9d"

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows NT\Windows File Protection
SFCScan = "0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\parameters
AutoShareServer = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\parameters
AutoShareWks = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
EnableFirewall = "0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
DoNotAllowExceptions = "0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
DisableNotifications = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\DomainProfile
EnableFirewall = "0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\DomainProfile
DoNotAllowExceptions = "0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\DomainProfile
DisableNotifications = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\MRT
DontReportInfectionInformation = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
unwise_.exe = "unwise_.exe:*:Enabled:SYSTEM"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\DomainProfile\AuthorizedApplications\
List
unwise_.exe = "unwise_.exe:*:Enabled:SYSTEM"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "3f"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "4"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "41"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "42"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "43"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "44"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "45"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "46"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "47"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "48"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "49"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "4a"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "4b"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "4c"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "4d"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "4e"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "4f"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "5"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "51"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "52"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "53"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "54"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "55"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "56"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "57"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "58"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "59"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "5a"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "5b"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "5c"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "5d"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "5e"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "5f"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "6"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "61"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "62"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "63"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "64"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "65"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Shell Extensions
reup = "66"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\GloballyOpenPorts\
List
445:TCP = "445:TCP:LocalSubNet:Enabled:@xpsp2res.dll,-22005"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\GloballyOpenPorts\
List
139:TCP = "139:TCP:LocalSubNet:Enabled:@xpsp2res.dll,-22004"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\GloballyOpenPorts\
List
1013:TCP = "1013:TCP:*:Enabled:BS"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\GloballyOpenPorts\
List
9999:TCP = "9999:TCP:*:Enabled:PORT1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\GloballyOpenPorts\
List
9991:TCP = "9991:TCP:*:Enabled:PORT2"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
%Windows%\Fonts\unwise_.exe = "%Windows%\Fonts\unwise_.exe:*:Enabled:workstation"

It modifies the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Tcpip\Parameters
TcpWindowSize = "3ebc"

(Note: The default value data of the said registry entry is faf0.)

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Lsa
restrictanonymous = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Ole
EnableDCOM = "N"

(Note: The default value data of the said registry entry is Y.)

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\NetBT\Parameters
TransportBindName = "\Device"

(Note: The default value data of the said registry entry is \Device\.)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center
AntiVirusDisableNotify = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center
AntiVirusOverride = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center
FirewallDisableNotify = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center
FirewallOverride = "1"

This report is generated via an automated analysis system.

SOLUTION

Minimum Scan Engine:

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

[ Learn More ]

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\Policies\Microsoft\Windows NT
- Windows File Protection

In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft
- MRT

Step 3

Delete this registry value

[ Learn More ]

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- msgone = "{malware path and file name}"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- intime = "04/21/2012, 02:53 PM"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control
- WaitToKillServiceT = "5000"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "3e"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters
- MaxUserPort = "fffe"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters
- TcpTimedWaitDelay = "1e"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters
- StrictTimeWaitSeqCheck = "1"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters
- Tcp1323Opts = "1"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters
- GlobalMaxTcpWindowSize = "3ebc"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters
- EnablePMTUDiscovery = "1"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters
- EnablePMTUBHDetect = "0"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters
- SackOpts = "1"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters
- DefaultTTL = "4"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters
- TcpMaxDupAcks = "2"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters
- LargeBufferSize = "c8"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters
- AllowUserRawAccess = "1"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters
- TcpNumConnections = "fffffe"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\AFD\Parameters
- DisableRawSecurity = "1"

In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate
- DoNotAllowXPSP2 = "1"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
- MaxConnectionsPer1_0Server = "fffe"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
- MaxConnectionsPerServer = "fffe"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\parameters
- SizReqBuf = "4"

In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\Windows File Protection
- SFCDisable = "ffffff9d"

In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\Windows File Protection
- SFCScan = "0"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\parameters
- AutoShareServer = "1"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\parameters
- AutoShareWks = "1"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile
- EnableFirewall = "0"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile
- DoNotAllowExceptions = "0"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile
- DisableNotifications = "1"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile
- EnableFirewall = "0"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile
- DoNotAllowExceptions = "0"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile
- DisableNotifications = "1"

In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\MRT
- DontReportInfectionInformation = "1"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
- unwise_.exe = "unwise_.exe:*:Enabled:SYSTEM"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\AuthorizedApplications\List
- unwise_.exe = "unwise_.exe:*:Enabled:SYSTEM"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "3f"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "4"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "41"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "42"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "43"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "44"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "45"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "46"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "47"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "48"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "49"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "4a"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "4b"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "4c"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "4d"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "4e"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "4f"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "5"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "51"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "52"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "53"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "54"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "55"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "56"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "57"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "58"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "59"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "5a"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "5b"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "5c"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "5d"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "5e"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "5f"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "6"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "61"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "62"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "63"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "64"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "65"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
- reup = "66"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts\List
- 445:TCP = "445:TCP:LocalSubNet:Enabled:@xpsp2res.dll,-22005"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts\List
- 139:TCP = "139:TCP:LocalSubNet:Enabled:@xpsp2res.dll,-22004"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts\List
- 1013:TCP = "1013:TCP:*:Enabled:BS"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts\List
- 9999:TCP = "9999:TCP:*:Enabled:PORT1"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts\List
- 9991:TCP = "9991:TCP:*:Enabled:PORT2"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
- %Windows%\Fonts\unwise_.exe = "%Windows%\Fonts\unwise_.exe:*:Enabled:workstation"

To delete the registry value this malware/grayware created:

Open Registry Editor. Click Start>Run, type REGEDIT, then press Enter.
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>Shell Extensions
In the right panel, locate and delete the entry:
msgone = "{malware path and file name}"
Again In the right panel, locate and delete the entry:
intime = "04/21/2012, 02:53 PM"
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Control
In the right panel, locate and delete the entry:
WaitToKillServiceT = "5000"
Again In the right panel, locate and delete the entry:
reup = "3e"
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Services>Tcpip>Parameters
In the right panel, locate and delete the entry:
MaxUserPort = "fffe"
Again In the right panel, locate and delete the entry:
TcpTimedWaitDelay = "1e"
Again In the right panel, locate and delete the entry:
StrictTimeWaitSeqCheck = "1"
Again In the right panel, locate and delete the entry:
Tcp1323Opts = "1"
Again In the right panel, locate and delete the entry:
GlobalMaxTcpWindowSize = "3ebc"
Again In the right panel, locate and delete the entry:
EnablePMTUDiscovery = "1"
Again In the right panel, locate and delete the entry:
EnablePMTUBHDetect = "0"
Again In the right panel, locate and delete the entry:
SackOpts = "1"
Again In the right panel, locate and delete the entry:
DefaultTTL = "4"
Again In the right panel, locate and delete the entry:
TcpMaxDupAcks = "2"
Again In the right panel, locate and delete the entry:
LargeBufferSize = "c8"
Again In the right panel, locate and delete the entry:
AllowUserRawAccess = "1"
Again In the right panel, locate and delete the entry:
TcpNumConnections = "fffffe"
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Services>AFD>Parameters
In the right panel, locate and delete the entry:
DisableRawSecurity = "1"
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Policies>Microsoft>Windows>WindowsUpdate
In the right panel, locate and delete the entry:
DoNotAllowXPSP2 = "1"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings
In the right panel, locate and delete the entry:
MaxConnectionsPer1_0Server = "fffe"
Again In the right panel, locate and delete the entry:
MaxConnectionsPerServer = "fffe"
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Services>lanmanserver>parameters
In the right panel, locate and delete the entry:
SizReqBuf = "4"
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Policies>Microsoft>Windows NT>Windows File Protection
In the right panel, locate and delete the entry:
SFCDisable = "ffffff9d"
Again In the right panel, locate and delete the entry:
SFCScan = "0"
Again In the right panel, locate and delete the entry:
AutoShareServer = "1"
Again In the right panel, locate and delete the entry:
AutoShareWks = "1"
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Services>SharedAccess>Parameters>FirewallPolicy>StandardProfile
In the right panel, locate and delete the entry:
EnableFirewall = "0"
Again In the right panel, locate and delete the entry:
DoNotAllowExceptions = "0"
Again In the right panel, locate and delete the entry:
DisableNotifications = "1"
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Services>SharedAccess>Parameters>FirewallPolicy>DomainProfile
In the right panel, locate and delete the entry:
EnableFirewall = "0"
Again In the right panel, locate and delete the entry:
DoNotAllowExceptions = "0"
Again In the right panel, locate and delete the entry:
DisableNotifications = "1"
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Policies>Microsoft>MRT
In the right panel, locate and delete the entry:
DontReportInfectionInformation = "1"
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Services>SharedAccess>Parameters>FirewallPolicy>StandardProfile>AuthorizedApplications>List
In the right panel, locate and delete the entry:
unwise_.exe = "unwise_.exe:*:Enabled:SYSTEM"
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Services>SharedAccess>Parameters>FirewallPolicy>DomainProfile>AuthorizedApplications>List
In the right panel, locate and delete the entry:
unwise_.exe = "unwise_.exe:*:Enabled:SYSTEM"
Again In the right panel, locate and delete the entry:
reup = "3f"
Again In the right panel, locate and delete the entry:
reup = "4"
Again In the right panel, locate and delete the entry:
reup = "41"
Again In the right panel, locate and delete the entry:
reup = "42"
Again In the right panel, locate and delete the entry:
reup = "43"
Again In the right panel, locate and delete the entry:
reup = "44"
Again In the right panel, locate and delete the entry:
reup = "45"
Again In the right panel, locate and delete the entry:
reup = "46"
Again In the right panel, locate and delete the entry:
reup = "47"
Again In the right panel, locate and delete the entry:
reup = "48"
Again In the right panel, locate and delete the entry:
reup = "49"
Again In the right panel, locate and delete the entry:
reup = "4a"
Again In the right panel, locate and delete the entry:
reup = "4b"
Again In the right panel, locate and delete the entry:
reup = "4c"
Again In the right panel, locate and delete the entry:
reup = "4d"
Again In the right panel, locate and delete the entry:
reup = "4e"
Again In the right panel, locate and delete the entry:
reup = "4f"
Again In the right panel, locate and delete the entry:
reup = "5"
Again In the right panel, locate and delete the entry:
reup = "51"
Again In the right panel, locate and delete the entry:
reup = "52"
Again In the right panel, locate and delete the entry:
reup = "53"
Again In the right panel, locate and delete the entry:
reup = "54"
Again In the right panel, locate and delete the entry:
reup = "55"
Again In the right panel, locate and delete the entry:
reup = "56"
Again In the right panel, locate and delete the entry:
reup = "57"
Again In the right panel, locate and delete the entry:
reup = "58"
Again In the right panel, locate and delete the entry:
reup = "59"
Again In the right panel, locate and delete the entry:
reup = "5a"
Again In the right panel, locate and delete the entry:
reup = "5b"
Again In the right panel, locate and delete the entry:
reup = "5c"
Again In the right panel, locate and delete the entry:
reup = "5d"
Again In the right panel, locate and delete the entry:
reup = "5e"
Again In the right panel, locate and delete the entry:
reup = "5f"
Again In the right panel, locate and delete the entry:
reup = "6"
Again In the right panel, locate and delete the entry:
reup = "61"
Again In the right panel, locate and delete the entry:
reup = "62"
Again In the right panel, locate and delete the entry:
reup = "63"
Again In the right panel, locate and delete the entry:
reup = "64"
Again In the right panel, locate and delete the entry:
reup = "65"
Again In the right panel, locate and delete the entry:
reup = "66"
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Services>SharedAccess>Parameters>FirewallPolicy>StandardProfile>GloballyOpenPorts>List
In the right panel, locate and delete the entry:
445:TCP = "445:TCP:LocalSubNet:Enabled:@xpsp2res.dll,-22005"
Again In the right panel, locate and delete the entry:
139:TCP = "139:TCP:LocalSubNet:Enabled:@xpsp2res.dll,-22004"
Again In the right panel, locate and delete the entry:
1013:TCP = "1013:TCP:*:Enabled:BS"
Again In the right panel, locate and delete the entry:
9999:TCP = "9999:TCP:*:Enabled:PORT1"
Again In the right panel, locate and delete the entry:
9991:TCP = "9991:TCP:*:Enabled:PORT2"
Again In the right panel, locate and delete the entry:
%Windows%\Fonts\unwise_.exe = "%Windows%\Fonts\unwise_.exe:*:Enabled:workstation"
Close Registry Editor.

Step 4

Restore these modified registry values

[ Learn More ]

Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters
- From: TcpWindowSize = "3ebc"
  To: TcpWindowSize = ""faf0""

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Lsa
- restrictanonymous = "1"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole
- From: EnableDCOM = "N"
  To: EnableDCOM = ""Y""

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\NetBT\Parameters
- From: TransportBindName = "\Device"
  To: TransportBindName = ""\Device\""

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center
- AntiVirusDisableNotify = "1"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center
- AntiVirusOverride = "1"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center
- FirewallDisableNotify = "1"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center
- FirewallOverride = "1"

Step 5

Scan your computer with your Trend Micro product to clean files detected as PE_VIRUT.AE. 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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