Tuesday, March 30, 2010

Tired of looking up security codes in events?

Hello,

I have put together a few Powershell functions for this lockout tool I am working on, which help decode some of the various Kerberos and logon codes in security event log events. They are not full tested, but hopefully should work fine as is.



function decode-krbTktOpts([string]$code) {
#code provided is in hex format
if (-not($code -match "0x\d{8}")) {
write-error "Invalid entry sent to decode-krbTktOpts function : value was : $code"
return $null
}


##########
#Ticket options are 32 bits of flags. Code comes in as hex. Only bits 0-1,3-5,16-17,20,23,25-31 are used
##########
$results = new-object collections.arraylist
$code = [convert]::toint32($code.substring($code.indexof("x")+1), 16)
if ($code -and 1) {
$results.add("Validate") >$null
} else if ($code -and 2) {
$results.add("Renew") >$null
} else if ($code -and 8) {
$results.add("EncTktInSKey") >$null
} else if ($code -and 16) {
$results.add("RenewableOK") >$null
} else if ($code -and 32) {
$results.add("DisableTransitedCheck") >$null
} else if ($code -and 65536) {
$results.add("Canonicalize") >$null
} else if ($code -and 131072) {
$results.add("CNameInAddlTkt") >$null
} else if ($code -and 1048576) {
$results.add("OptHardwareAuth") >$null
} else if ($code -and 8388608) {
$results.add("Renewable") >$null
} else if ($code -and 33554432) {
$results.add("AllowPostDate") >$null
} else if ($code -and 67108864) {
$results.add("Proxy") > $null
} else if ($code -and 134217728) {
$results.add("Proxiable") > $null
} else if ($code -and 268435456) {
$results.add("Forwarded") > $null
} else if ($code -and 536870912) {
$results.add("Forwardable") > $null
}
return $results

}

function decode-LogonErrorCode([string]$code) {
#decode 32 bit microsoft logon error codes from Hex format (32 bit)
if (-not($code -match "0x\d{8}")) {
write-error "Invalid entry sent to decode-krbTktOpts function : value was : $code"
return $null
}

switch($code.tolower()) {
"0x0" { return "Successful login" }
"0xC0000064" { return "The specified user does not exist" }
"0xC000006A" { return "The value provided as the current password is not correct" }
"0xC000006C" { return "Password policy not met" }
"0xC000006D" { return "The attempted logon is invalid due to a bad user name"}
"0xC000006E" { return "User account restriction has prevented successful login"}
"0xC000006F" { return "The user account has time restrictions and may not be logged onto at this time"}
"0xC0000070" { return "The user is restricted and may not log on from the source workstation"}
"0xC0000071" { return "The user account's password has expired"}
"0xC0000072" { return "The user account is currently disabled"}
"0xC000009A" { return "Insufficient system resources"}
"0xC0000193" { return "The user's account has expired"}
"0xC0000224" { return "User must change his password before he logs on the first time"}
"0xC0000234" { return "The user account has been automatically locked" }
default {return "Unknown code provided, unable to translate" }
}

}

function decode-krbErrCode([string]$code) {
#code provided is required to be in the hex format provided in the system event logs ex: 0x2
if (-not($code -match "x")) {
#if we receive something in invalid format, try to convert to hex
if ($code -match "\d+") {
$code = "0x" + [string]::format("{0:x}",$code)
} else {
write-error "Invalid entry sent to decode-krbErrCode function : value was : $code"
return $null
}
}

switch($code.tolower()) {
"0x0" { return ("KDC_ERR_NONE","No Error") }
"0x1" { return ("KDC_ERR_NAME_EXP","Clients entry in Database has Expired") }
"0x2" { return ("KDC_ERR_SERVICE_EXP","Servers entry in Database has Expired") }
"0x3" { return ("KDC_ERR_BAD_PVNO","Request protocol version number not supported") }
"0x4" { return ("KDC_ERR_C_OLD_MAST_KVNO","Client's key encrypted in old master key") }
"0x5" { return ("KDC_ERR_S_OLD_MAST_KVNO","Servers key encrypted in old master key") }
"0x6" { return ("KDC_ERR_C_PRINCIPAL_UNKNOWN","Client not found in Kerberos Database") }
"0x7" { return ("KDC_ERR_S_PRINCIPAL_UNKNOWN","Server not found in Kerberos Database") }
"0x8" { return ("KDC_ERR_PRINCIPAL_NOT_UNIQUE","Multiple principal entries in database") }
"0x9" { return ("KDC_ERR_NULL_KEY", "The client or server has a null key") }
"0xa" { return ("KDC_ERR_CANNOT_POSTDATE", "Ticket not eligible for postdating") }
"0xb" { return ("KDC_ERR_NEVER_VALID","Requested start time is later than end time") }
"0xc" { return ("KDC_ERR_POLICY","KDC policy rejects request") }
"0xd" { return ("KDC_ERR_BADOPTION","KDC cannot accomodate requested option") }
"0xe" { return ("KDC_ERR_ETYPE_NOSUPP","Kerberos server has no support for this encryption type") }
"0xf" { return ("KDC_ERR_SUMTYPE_NOSUPP","Kerberos server has no support for checksum type") }
"0x10" { return ("KDC_ERR_PADATA_TYPE_NOSUPP","Kerberos server has no support for PADATA type") }
"0x11" { return ("KDC_ERR_TRTYPE_NOSUPP", "Kerberos server has no support for transited type") }
"0x12" { return ("KDC_ERR_CLIENT_REVOKED","Clients credentials have been revoked") }
"0x13" { return ("KDC_ERR_SERVICE_REVOKED","Credentials for server have been revoked") }
"0x14" { return ("KDC_ERR_TGT_REVOKED","TGT has been revoked") }
"0x15" { return ("KDC_ERR_CLIENT_NOTYET","Client not yet valid") }
"0x16" { return ("KDC_ERR_SERVICE_NOTYET", "Server not yet valid") }
"0x17" { return ("KDC_ERR_KEY_EXPIRED", "Password has expired - change password to reset") }
"0x18" { return ("KDC_ERR_PREAUTH_FAILED","Preauthentication is invalid, bad password") }
"0x19" { return ("KDC_ERR_PREAUTH_REQUIRED","Additional Preauthentication required") }
"0x1f" { return ("KRB_AP_ERR_BAD_INTEGRITY","Integrity check on decrypted field failed") }
"0x20" { return ("KRB_AP_ERR_TKT_EXPIRED","Ticket expired")}
"0x21" { return ("KRB_AP_ERR_TKT_NYV","Ticket not yet valid")}
"0x22" { return ("KRB_AP_ERR_REPEAT","Request is a replay")}
"0x23" { return ("KRB_AP_ERR_NOT_US","The ticket isn't for us")}
"0x24" { return ("KRB_AP_ERR_BADMATCH", "Ticket and authenticator do not match") }
"0x25" { return ("KRB_AP_ERR_SKEW", "Clock skew is too big")}
"0x26" { return ("KRB_AP_ERR_BADADDR", "Incorrect net address") }
"0x27" { return ("KRB_AP_ERR_BADVERSION", "Protocol version mismatch") }
"0x28" { return ("KRB_AP_ERR_MSG_TYPE", "Invalid message type") }
"0x29" { return ("KRB_AP_ERR_MODIFIED", "Message stream modified") }
"0x2a" { return ("KRB_AP_ERR_BADORDER", "Message out of order") }
"0x2c" { return ("KRB_AP_ERR_BADKEYVER","Specified version of key is not available") }
"0x2d" { return ("KRB_AP_ERR_NOKEY", "Service key not available") }
"0x2e" { return ("KRB_AP_ERR_MUT_FAIL", "Mutual authentication failed") }
"0x2f" { return ("KRB_AP_ERR_BADDIRECTION", "Incorrect message direction") }
"0x30" { return ("KRB_AP_ERR_METHOD", "Alternative authentication method required") }
"0x31" { return ("KRB_AP_ERR_BADSEQ", "Incorrect sequence number in message") }
"0x32" { return ("KRB_AP_ERR_INAPP_CKSUM", "Inappropriate type of checksum in message") }
"0x3c" { return ("KRB_ERR_GENERIC", "Generic error") }
"0x3d" { return ("KRB_ERR_FIELD_TOOLONG","Field is too long for this implementation") }
default { return ("Invalid code", "not in RFC") }
}

}

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