a.bat created on startup, avast thinks it is a virus

[juggernaut911]

There is a bat file created in my systemroot on startup every startup that screws with my registry (as far as i can gather before I delete with avast).

any ideas?

 

[Banger]

You should be able to open the .bat with notepad, post the contents in "code tags" here.

 

[Hehe Moo]

So avast is an anti-virus?

 

[Sir-Fritz]

yes it is.

 

[Banger]

So avast is an anti-virus?

As Sir-Fritz said it is, however anti-viruses can show false positives, and each anti virus shows different false positives, so it might not be that is why he is asking, and by seeing the "code" it should help people figure out if it is a virus or not.

 

[juggernaut911]

this ios the src of the bat:

@echo off
Echo REGEDIT4>%temp%\1.reg
Echo.>>%temp%\1.reg
EchoÂÂ[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NetBT\Parameters]>>%temp%\1.reg
Echo "TransportBindName"="">>%temp%\1.reg
Echo.>>%temp%\1.reg
EchoÂÂ[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess]>>%temp%\1.reg
Echo "Start"=dword:00000004>>%temp%\1.reg
Echo.>>%temp%\1.reg
EchoÂÂ[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv]>>%temp%\1.reg
Echo "Start"=dword:00000004>>%temp%\1.reg
Echo.>>%temp%\1.reg
EchoÂÂ[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\wscsvc]>>%temp%\1.reg
Echo "Start"=dword:00000004>>%temp%\1.reg
Echo.>>%temp%\1.reg
Echo [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole]>>%temp%\1.reg
Echo "EnableDCOM"="N">>%temp%\1.reg
Echo "EnableRemoteConnect"="N">>%temp%\1.reg
Echo.>>%temp%\1.reg
EchoÂÂ[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa]>>%temp%\1.reg
Echo "restrictanonymous"=dword:00000001>>%temp%\1.reg
Echo.>>%temp%\1.reg
EchoÂÂ[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\PCT1.0\Server]>>%temp%\1.reg
Echo "Enabled"=hex:00>>%temp%\1.reg
Echo.>>%temp%\1.reg
EchoÂÂ[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\lanmanserver\parameters]>>%temp%\1.reg
Echo "AutoShareWks"=dword:00000000>>%temp%\1.reg
Echo "AutoShareServer"=dword:00000000>>%temp%\1.reg
Echo.>>%temp%\1.reg
EchoÂÂ[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]>>%temp%\1.reg
Echo "NameServer"="">>%temp%\1.reg
Echo "ForwardBroadcasts"=dword:00000000>>%temp%\1.reg
Echo "IPEnableRouter"=dword:00000000>>%temp%\1.reg
Echo "Domain"="">>%temp%\1.reg
Echo "SearchList"="">>%temp%\1.reg
Echo "UseDomainNameDevolution"=dword:00000001>>%temp%\1.reg
Echo "EnableICMPRedirect"=dword:00000000>>%temp%\1.reg
Echo "DeadGWDetectDefault"=dword:00000001>>%temp%\1.reg
Echo "DontAddDefaultGatewayDefault"=dword:00000000>>%temp%\1.reg
Echo "EnableSecurityFilters"=dword:00000001>>%temp%\1.reg
Echo "AllowUnqualifiedQuery"=dword:00000000>>%temp%\1.reg
Echo "PrioritizeRecordData"=dword:00000001>>%temp%\1.reg
Echo "TCP1320Opts"=dword:00000003>>%temp%\1.reg
Echo "KeepAliveTime"=dword:00023280>>%temp%\1.reg
Echo "BcastQueryTimeout"=dword:000002ee>>%temp%\1.reg
Echo "BcastNameQueryCount"=dword:00000001>>%temp%\1.reg
Echo "CacheTimeout"=dword:0000ea60>>%temp%\1.reg
Echo "Size/Small/Medium/Large"=dword:00000003>>%temp%\1.reg
Echo "LargeBufferSize"=dword:00001000>>%temp%\1.reg
Echo "SynAckProtect"=dword:00000002>>%temp%\1.reg
Echo "PerformRouterDiscovery"=dword:00000000>>%temp%\1.reg
Echo "EnablePMTUBHDetect"=dword:00000000>>%temp%\1.reg
Echo "FastSendDatagramThreshold "=dword:00000400>>%temp%\1.reg
Echo "StandardAddressLength "=dword:00000018>>%temp%\1.reg
Echo "DefaultReceiveWindow "=dword:00004000>>%temp%\1.reg
Echo "DefaultSendWindow"=dword:00004000>>%temp%\1.reg
Echo "BufferMultiplier"=dword:00000200>>%temp%\1.reg
Echo "PriorityBoost"=dword:00000002>>%temp%\1.reg
Echo "IrpStackSize"=dword:00000004>>%temp%\1.reg
Echo "IgnorePushBitOnReceives"=dword:00000000>>%temp%\1.reg
Echo "DisableAddressSharing"=dword:00000000>>%temp%\1.reg
Echo "AllowUserRawAccess"=dword:00000000>>%temp%\1.reg
Echo "DisableRawSecurity"=dword:00000000>>%temp%\1.reg
Echo "DynamicBacklogGrowthDelta"=dword:00000032>>%temp%\1.reg
Echo "FastCopyReceiveThreshold"=dword:00000400>>%temp%\1.reg
Echo "LargeBufferListDepth"=dword:0000000a>>%temp%\1.reg
Echo "MaxActiveTransmitFileCount"=dword:00000002>>%temp%\1.reg
Echo "MaxFastTransmit"=dword:00000040>>%temp%\1.reg
Echo "OverheadChargeGranularity"=dword:00000001>>%temp%\1.reg
Echo "SmallBufferListDepth"=dword:00000020>>%temp%\1.reg
Echo "SmallerBufferSize"=dword:00000080>>%temp%\1.reg
Echo "TransmitWorker"=dword:00000020>>%temp%\1.reg
Echo "DNSQueryTimeouts" =hex(7):31,00,00,00,32,00,00,00,32,00,00,00,34,00,00,00,38,00,00,00,30,00,00,00,00,0
>>%temp%\1.reg
Echo "DefaultRegistrationTTL"=dword:00000014>>%temp%\1.reg
Echo "DisableReplaceAddressesInConflicts"=dword:00000000>>%temp%\1.reg
Echo "DisableReverseAddressRegistrations"=dword:00000001>>%temp%\1.reg
Echo "UpdateSecurityLevel "=dword:00000000>>%temp%\1.reg
Echo "DisjointNameSpace"=dword:00000001>>%temp%\1.reg
Echo "QueryIpMatching"=dword:00000000>>%temp%\1.reg
Echo "NoNameReleaseOnDemand"=dword:00000001>>%temp%\1.reg
Echo "EnableDeadGWDetect"=dword:00000000>>%temp%\1.reg
Echo "EnableFastRouteLookup"=dword:00000001>>%temp%\1.reg
Echo "MaxFreeTcbs"=dword:000007d0>>%temp%\1.reg
Echo "MaxHashTableSize"=dword:00000800>>%temp%\1.reg
Echo "SackOpts"=dword:00000001>>%temp%\1.reg
Echo "Tcp1323Opts"=dword:00000003>>%temp%\1.reg
Echo "TcpMaxDupAcks"=dword:00000001>>%temp%\1.reg
Echo "TcpRecvSegmentSize"=dword:00000585>>%temp%\1.reg
Echo "TcpSendSegmentSize"=dword:00000585>>%temp%\1.reg
Echo "TcpWindowSize"=dword:0007d200>>%temp%\1.reg
Echo "DefaultTTL"=dword:00000030>>%temp%\1.reg
Echo "TcpMaxHalfOpen"=dword:0000004b>>%temp%\1.reg
Echo "TcpMaxHalfOpenRetried"=dword:00000050>>%temp%\1.reg
Echo "TcpTimedWaitDelay"=dword:00000000>>%temp%\1.reg
Echo "MaxNormLookupMemory"=dword:00030d40>>%temp%\1.reg
Echo "FFPControlFlags"=dword:00000001>>%temp%\1.reg
Echo "FFPFastForwardingCacheSize"=dword:00030d40>>%temp%\1.reg
Echo "MaxForwardBufferMemory"=dword:00019df7>>%temp%\1.reg
Echo "MaxFreeTWTcbs"=dword:000007d0>>%temp%\1.reg
Echo "GlobalMaxTcpWindowSize"=dword:0007d200>>%temp%\1.reg
Echo "EnablePMTUDiscovery"=dword:00000001>>%temp%\1.reg
Echo "ForwardBufferMemory"=dword:00019df7>>%temp%\1.reg
Echo.>>%temp%\1.reg
EchoÂÂ[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings]>>%temp%\1.reg
Echo "MaxConnectionsPer1_0Server"=dword:00000050>>%temp%\1.reg
Echo "MaxConnectionsPerServer"=dword:00000050>>%temp%\1.reg
Echo.>>%temp%\1.reg
START /WAIT REGEDIT /S %temp%\1.reg
DEL %temp%\1.reg
DEL %0

there is no 1.reg file in my temp folder, seems like a poorly written bat... any ideas?

it is deffinatley created on boot

 

[DarkRey]

are you using any altered versions of windows? e.g tinyvista
they are modified versions of windows

 

[juggernaut911]

I am using my own hacked up vista

 

[Maikel Steneker]

there is no 1.reg file in my temp folder, seems like a poorly written bat... any ideas?

Poorly written? No, not really.

What this does is paste all these lines in the file %temp%\1.reg. When it's done, it deletes the reg-file.

I don't have a clue what the reg-file does though. Could be a virus.

 

[juggernaut911]

well, if I can't find the reg file, that means either:
The bat hasn't ran
The bat somehow couldn't delete itself leading me to find it, but not the reg

hmmm... I don't notice any negative effects so far. though, most of the internet tweaks are for IE not firefox, so I wouldn't experience them anyways...

 

[Votkrath]

If it's not a real Virus you can try to go to start and search for msconfig and start it up and you can probably understand yourself what it is. If it won't work tell me.