WORM_MYTOB.NZ

To restart in Safe Mode:

• For Windows 2000 users

1. Restart your computer.
2. Press F8 when you see the Starting Windows bar at the bottom of the screen.
3. Choose the Safe Mode option from the Windows Advanced Options menu then press Enter.

• For Windows XP users

1. Restart your computer.
2. Press F8 after the Power-On Self Test (POST) routine is done. If the Windows Advanced Options menu does not appear, try restarting then pressing F8 several times when the POST screen appears.
3. Choose the Safe Mode option from the Windows Advanced Options menu then press Enter.

• For Windows Server 2003 users

1. Restart your computer.
2. Press F8 after Windows starts up. If the Windows Advanced Options menu does not appear, try restarting again and pressing F8 several times afterward.
3. On the Windows Advanced Option menu, use the arrow keys to select Safe Mode then press Enter.

To delete the registry key this malware/grayware created:

1. Open Registry Editor. Click Start>Run, type REGEDIT, then press Enter.
2. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>Software>Microsoft>Windows>CurrentVersion
3. Still in the left panel, locate and delete the key:
   RunServices
4. In the left panel, double-click the following:
   HKEY_CURRENT_USER>Software>Microsoft
5. Still in the left panel, locate and delete the key:
   OLE
6. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Control>SecurityProviders>SCHANNEL>Protocols>PCT1.0
7. Still in the left panel, locate and delete the key:
   Server
8. Close Registry Editor.

To delete the registry value this malware/grayware created:

1. Open Registry Editor. Click Start>Run, type REGEDIT, then press Enter.
2. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>Run
3. In the right panel, locate and delete the entry:
   Windows System Update Tools = "upds.exe"
4. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>RunServices
5. In the right panel, locate and delete the entry:
   Windows System Update Tools = "upds.exe"
6. In the left panel, double-click the following:
   HKEY_CURRENT_USER>Software>Microsoft>OLE
7. In the right panel, locate and delete the entry:
   Windows System Update Tools = "upds.exe"
8. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Services>SharedAccess>Parameters>FirewallPolicy>StandardProfile>AuthorizedApplications>List
9. In the right panel, locate and delete the entry:
   %System%\upds.exe = "%System%\upds.exe:*:Enabled:Windows System Update Tools"
10. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Ole
11. In the right panel, locate and delete the entry:
    EnableRemoteConnect = "N"
12. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Control>SecurityProviders>SCHANNEL>Protocols>PCT1.0>Server
13. In the right panel, locate and delete the entry:
    Enabled = "{random values}"
14. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Services>lanmanserver>parameters
15. In the right panel, locate and delete the entry:
    AutoShareWks = "0"
16. Again In the right panel, locate and delete the entry:
    AutoShareServer = "0"
17. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Services>Tcpip>Parameters
18. In the right panel, locate and delete the entry:
    AllowUnqualifiedQuery = "0"
19. Again In the right panel, locate and delete the entry:
    PrioritizeRecordData = "1"
20. Again In the right panel, locate and delete the entry:
    TCP1320Opts = "3"
21. Again In the right panel, locate and delete the entry:
    KeepAliveTime = "2328"
22. Again In the right panel, locate and delete the entry:
    BcastQueryTimeout = "2ee"
23. Again In the right panel, locate and delete the entry:
    BcastNameQueryCount = "1"
24. Again In the right panel, locate and delete the entry:
    CacheTimeout = "ea6"
25. Again In the right panel, locate and delete the entry:
    Size/Small/Medium/Large = "3"
26. Again In the right panel, locate and delete the entry:
    LargeBufferSize = "1"
27. Again In the right panel, locate and delete the entry:
    SynAckProtect = "2"
28. Again In the right panel, locate and delete the entry:
    PerformRouterDiscovery = "0"
29. Again In the right panel, locate and delete the entry:
    EnablePMTUBHDetect = "0"
30. Again In the right panel, locate and delete the entry:
    FastSendDatagramThreshold = "4"
31. Again In the right panel, locate and delete the entry:
    StandardAddressLength = "18"
32. Again In the right panel, locate and delete the entry:
    DefaultReceiveWindow = "4"
33. Again In the right panel, locate and delete the entry:
    DefaultSendWindow = "4"
34. Again In the right panel, locate and delete the entry:
    BufferMultiplier = "2"
35. Again In the right panel, locate and delete the entry:
    PriorityBoost = "2"
36. Again In the right panel, locate and delete the entry:
    IrpStackSize = "4"
37. Again In the right panel, locate and delete the entry:
    IgnorePushBitOnReceives = "0"
38. Again In the right panel, locate and delete the entry:
    DisableAddressSharing = "0"
39. Again In the right panel, locate and delete the entry:
    AllowUserRawAccess = "0"
40. Again In the right panel, locate and delete the entry:
    DisableRawSecurity = "0"
41. Again In the right panel, locate and delete the entry:
    DynamicBacklogGrowthDelta = "32"
42. Again In the right panel, locate and delete the entry:
    FastCopyReceiveThreshold = "4"
43. Again In the right panel, locate and delete the entry:
    LargeBufferListDepth = "a"
44. Again In the right panel, locate and delete the entry:
    MaxActiveTransmitFileCount = "2"
45. Again In the right panel, locate and delete the entry:
    MaxFastTransmit = "4"
46. Again In the right panel, locate and delete the entry:
    OverheadChargeGranularity = "1"
47. Again In the right panel, locate and delete the entry:
    SmallBufferListDepth = "2"
48. Again In the right panel, locate and delete the entry:
    SmallerBufferSize = "8"
49. Again In the right panel, locate and delete the entry:
    TransmitWorker = "2"
50. Again In the right panel, locate and delete the entry:
    DNSQueryTimeouts = "1"
51. Again In the right panel, locate and delete the entry:
    DefaultRegistrationTTL = "14"
52. Again In the right panel, locate and delete the entry:
    DisableReplaceAddressesInConflicts = "0"
53. Again In the right panel, locate and delete the entry:
    DisableReverseAddressRegistrations = "1"
54. Again In the right panel, locate and delete the entry:
    UpdateSecurityLevel = "0"
55. Again In the right panel, locate and delete the entry:
    DisjointNameSpace = "1"
56. Again In the right panel, locate and delete the entry:
    QueryIpMatching = "0"
57. Again In the right panel, locate and delete the entry:
    NoNameReleaseOnDemand = "1"
58. Again In the right panel, locate and delete the entry:
    EnableDeadGWDetect = "0"
59. Again In the right panel, locate and delete the entry:
    EnableFastRouteLookup = "1"
60. Again In the right panel, locate and delete the entry:
    MaxFreeTcbs = "7d"
61. Again In the right panel, locate and delete the entry:
    MaxHashTableSize = "8"
62. Again In the right panel, locate and delete the entry:
    SackOpts = "1"
63. Again In the right panel, locate and delete the entry:
    Tcp1323Opts = "3"
64. Again In the right panel, locate and delete the entry:
    TcpMaxDupAcks = "1"
65. Again In the right panel, locate and delete the entry:
    TcpRecvSegmentSize = "585"
66. Again In the right panel, locate and delete the entry:
    TcpSendSegmentSize = "585"
67. Again In the right panel, locate and delete the entry:
    DefaultTTL = "3"
68. Again In the right panel, locate and delete the entry:
    TcpMaxHalfOpen = "4b"
69. Again In the right panel, locate and delete the entry:
    TcpMaxHalfOpenRetried = "5"
70. Again In the right panel, locate and delete the entry:
    TcpTimedWaitDelay = "0"
71. Again In the right panel, locate and delete the entry:
    MaxNormLookupMemory = "3d4"
72. Again In the right panel, locate and delete the entry:
    FFPControlFlags = "1"
73. Again In the right panel, locate and delete the entry:
    FFPFastForwardingCacheSize = "3d4"
74. Again In the right panel, locate and delete the entry:
    MaxForwardBufferMemory = "19df7"
75. Again In the right panel, locate and delete the entry:
    MaxFreeTWTcbs = "7d"
76. Again In the right panel, locate and delete the entry:
    GlobalMaxTcpWindowSize = "7d2"
77. Again In the right panel, locate and delete the entry:
    EnablePMTUDiscovery = "1"
78. Again In the right panel, locate and delete the entry:
    ForwardBufferMemory = "19df7"
79. In the left panel, double-click the following:
    HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings
80. In the right panel, locate and delete the entry:
    MaxConnectionsPer1_0Server = "5"
81. Again In the right panel, locate and delete the entry:
    MaxConnectionsPerServer = "5"
82. Close Registry Editor.

To restore the registry value this malware/grayware/spyware modified:

1. Open Registry Editor. Click Start>Run, type REGEDIT, then press Enter.
2. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Ole
3. In the right panel, locate the registry value:
   EnableDCOM = "N"
4. Right-click on the value name and choose Modify. Change the value data of this entry to:
   EnableDCOM = "Y"
5. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Control>Lsa
6. In the right panel, locate the registry value:
   restrictanonymous = "1"
7. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Services>SharedAccess
8. In the right panel, locate the registry value:
   Start = "4"
9. Right-click on the value name and choose Modify. Change the value data of this entry to:
   Start = "2"
10. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Services>wuauserv
11. In the right panel, locate the registry value:
    Start = "4"
12. Right-click on the value name and choose Modify. Change the value data of this entry to:
    Start = "2"
13. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Services>wscsvc
14. In the right panel, locate the registry value:
    Start = "4"
15. Right-click on the value name and choose Modify. Change the value data of this entry to:
    Start = "2"
16. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Services>Tcpip>Parameters
17. In the right panel, locate the registry value:
    ForwardBroadcasts = "0"
18. Again In the right panel, locate the registry value:
    IPEnableRouter = "0"
19. Again In the right panel, locate the registry value:
    UseDomainNameDevolution = "1"
20. Right-click on the value name and choose Modify. Change the value data of this entry to:
    UseDomainNameDevolution = "1"
21. Again In the right panel, locate the registry value:
    EnableICMPRedirect = "0"
22. Right-click on the value name and choose Modify. Change the value data of this entry to:
    EnableICMPRedirect = "1"
23. Again In the right panel, locate the registry value:
    DeadGWDetectDefault = "1"
24. Right-click on the value name and choose Modify. Change the value data of this entry to:
    DeadGWDetectDefault = "1"
25. Again In the right panel, locate the registry value:
    DontAddDefaultGatewayDefault = "0"
26. Again In the right panel, locate the registry value:
    EnableSecurityFilters = "1"
27. Again In the right panel, locate the registry value:
    TcpWindowSize = "7d2"
28. Right-click on the value name and choose Modify. Change the value data of this entry to:
    TcpWindowSize = "faf0"
29. Close Registry Editor.

To delete malware/grayware component files:

1. Search for the following files:
   
   • %System Root%\a.bat
   • %User Temp%\1.reg
   
   Note: To do a search for the following files, right-click Start then click Search... or Find..., depending on the version of Windows you are running. For each file to be deleted, type its file name in the Named input box. In the Look In drop-down list, select My Computer, then press Enter.
2. Once located, select the file then press SHIFT+DELETE to permanently delete the file.
3. Repeat the said steps for all files listed.