Penetration Testing mailing list archives
RE: Hacking to Xp box
From: Eduardo Suzuki <eduardo.ac.suzuki () gmail com>
Date: Mon, 5 Sep 2005 10:11:09 -0300
-----Original Message----- From: Marco Monicelli [mailto:marco.monicelli () marcegaglia com] Sent: Monday, September 05, 2005 6:24 AM To: Eduardo Suzuki Cc: 'Juan B'; pen-test () securityfocus com Subject: RE: Hacking to Xp box Importance: High Dear Eduardo/list, I didn't discuss the fact that a server is much more juicy to hit for an hacker than the simple workstation, even if it is the CEO box. Once stated this, we can proceed with the next point. First, SP2's firewall can by easily bypass as mostly firewalls with injection techinque. Infact they normally tend to allow HTTP traffic for example. If the firewall doesn't block ICMP, you can use some ICMP backdoor which replies to a special crafted packet ICMP ping with a reverse connect shell. If you get admin privilegies on that box, you can even think to stop the firewall service on that machine. If the RAW sockets limit is your problem, you can easily ENABLE back the raw sockets with some right command lines (google is your best friend once again).
Could you please point me any article/POC/tool that demonstrates this injection technique? AFAIK by default XP SP2 firewall blocks incoming packets if they don't match an existing outbound session. Even if some port is open, you need to find some vulnerability that could be exploited to run arbitrary code. What do you mean by ICMP backdoor? Is it something related to covert channels? If so, you need to have admin privileges to be able to install such a tool.
Regarding the JPG/GIF question, there are many joiner/merger on the net which are not recognized by AV and they can hide an EXE file inside the Picture. Once the guy opens the pic, then the EXE is excecuted hiddenly and secretly. I'm not taking into consideration the buffer overflow vulnerability as it is now a bit too old to be exploited (expecially on a fully patched machine). So the trick is just that a "not really expert" guy will prolly open a picture (curiosity helps hackers a lot) and get infected easily without exploiting any vulnerability. I call this "curiosity engeneering".... ehehehhehe....
I'm curious about it. When you open an image, you don't execute it (not in the same way as you execute a PE-format file). If you join the executable with an image and keep it as an image, for the operating system the added bytes are considered part of the image, not a code in machine language.
HXDEF is correctly a rootkit which means you first have to get admin rights on the target box. I've suggested that in order to mention rootkits which can be useful to an hacker, once he got admin privilegies. Did you ever see this file "hxdef defeating modern detectors.rar"? It is a movie which shows how it is NOT detected by most of the rootkit's hunters. But maybe that movie is not updated and you're right (I couldn't test it unfortunately).
Give RootkitRevealer a try. :-) You'll see that it finds hxdef without any problem. It even tells you what string hxdef is hiding and where its executable is. By default the executable reads its configuration from a file with the same name, so you can easily find it. Then you can "clean" the configuration file (because it can be scrambled by filling it with extra characters in some of the sections) and see what it's hiding on the infected machine. Another way to detect hxdef is by comparing the file list of the infected machine in two different ways. First you get the file list locally, then you get it remotely (using an administrative share, for example). Hxdef isn't able to hide its files if you list them through a network. So you can find the hidden files by comparing the two lists. If you see a pattern (for example, remotely you can see files that match "tohide*"), then you can be almost sure this is the string hxdef is using to hide its evidence. After you find out the string you can do a little test. Create a directory that starts with the string, then see if it's listed using "dir". Even when it's hidden you can enter into it without any problem.
Anyway, the main point to show the CEO the insecurity of the box is to get ADMIN privilegies over there. Then you can choose the game you wanna play on that computer. I'm opened to any further suggestion, tnx for yours Eduardo.
Thanks for your opinion as well, Marco!
Cheers Marco Hi, Marco! IMO, I think it's harder to attack a workstation compared to a server through a network, since servers must have some open port in listening state. On a workstation the user is the weakest point most of the time, while on a server there are many other parts to take into account. If there is a firewall in place (for example, the one that comes with XP SP2), which attacks are possible through a network? AFAIK just a few. Windows XP restricts most of the attacks that use anonymous connections. Service Pack 2 restricts even more. If you are a domain admin, there are many possibilities, but that's not the case here. What do you mean by "executing a jpg or a gif file"? I know there are buffer overflow vulnerabilities that can be exploited when opening an image, but it's not a trivial attack. I'm not sure (because I didn't try it), but I think it's even harder to do it when you need to merge an executable into an image using a joiner. I'd like to know what you think about it. Regarding the hxdef rootkit, you can find it out by using RootKitRevealer from SysInternals. It's available at http://www.sysinternals.com/Utilities/RootkitRevealer.html. BTW, hxdef isn't considered an attack tool. It's used after you successfully got access to a computer, when you want to hide files, open ports and so on. Just my $0.02. Regards, Eduardo Suzuki esuzuki_br () pop com br Eduardo.AC.Suzuki () gmail com "The essential is invisible to the eyes." -----Original Message----- From: Marco Monicelli [mailto:marco.monicelli () marcegaglia com] Sent: Friday, September 02, 2005 6:12 AM To: Juan B Cc: pen-test () securityfocus com Subject: Re: Hacking to Xp box Importance: High Ciao juan! If the CEO box is fully patched and FW is enabled, then your mission is a little bit more difficult to accomplish. Besides, there are thousands of recent exploits for windows which you can try. For example, did you try the Universal exploit for the Plug and Play vulnerability? It is published everywhere. You can try with more recent exploits than the DCOM exploit which is at least 3 years old. If you want to try with the trojan, I would suggest you to google for Bifrost, which is a Remote Administration Tool (you can call it trojan if you prefer) that is completely UNDETECTED by any AV (at the moment it is still 100% undetected). You can pack it inside any file (exe, jpg, gif....) and it will be executed silently and hiddenly. Moreover, Bifrost can bypass firewalls injecting itself into Explorer.exe process. Another good UNDETECTED tool is hxdef rootkit. Arp poisoning could do the job but why not trying to steal the SAM file and to crack it? You can do that remotely if the machine has the ports you mentioned opened. I bet you know some tool to steal the SAM and to crack it. I love SAMDUMP for example. ;) Last but not least, you can try with a Denial of Service to show your CEO how easily a kid can prevent you from working with a simple DoS. Why not sniffing the network? There are many undetected sniffers around the Web. Just my 2 cents ;) Marco Hi Guys Please give me a hend here. Im trying to penetrate the CEO box to show him why we need better security in our company, he told me to show me how it can be done. he has xp pro sp 2 with all the pathches installed and FW enbled but I cant ! I tried to use metasploit with the ms rpc dcom exploit but it didnt worked. nessus found port 135 139 2000 and ntp are opened and also he can read some smb shares and also outputed that this host doesnt disgard SYN packets that have the FIN flag set. and port 2000 (callback is open). what I can try more to break this box? any ideas? I know I allways can try to arp poison his arp table and pass all the machines traffic throw my laptop to capture some passwords but this is enough. or send him a trojan but we have a good anti virus protection . Does some of you have Ideas ? Thanks a lot ! Juan __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -------------------------------------------------------------------------- -- -- Audit your website security with Acunetix Web Vulnerability Scanner: Hackers are concentrating their efforts on attacking applications on your website. Up to 75% of cyber attacks are launched on shopping carts, forms, login pages, dynamic content etc. Firewalls, SSL and locked-down servers are futile against web application hacking. Check your website for vulnerabilities to SQL injection, Cross site scripting and other web attacks before hackers do! Download Trial at: http://www.securityfocus.com/sponsor/pen-test_050831 -------------------------------------------------------------------------- -- --- -------------------------------------------------------------------------- -- -- Audit your website security with Acunetix Web Vulnerability Scanner: Hackers are concentrating their efforts on attacking applications on your website. Up to 75% of cyber attacks are launched on shopping carts, forms, login pages, dynamic content etc. Firewalls, SSL and locked-down servers are futile against web application hacking. Check your website for vulnerabilities to SQL injection, Cross site scripting and other web attacks before hackers do! Download Trial at: http://www.securityfocus.com/sponsor/pen-test_050831 -------------------------------------------------------------------------- -- ---
------------------------------------------------------------------------------ Audit your website security with Acunetix Web Vulnerability Scanner: Hackers are concentrating their efforts on attacking applications on your website. Up to 75% of cyber attacks are launched on shopping carts, forms, login pages, dynamic content etc. Firewalls, SSL and locked-down servers are futile against web application hacking. Check your website for vulnerabilities to SQL injection, Cross site scripting and other web attacks before hackers do! Download Trial at: http://www.securityfocus.com/sponsor/pen-test_050831 -------------------------------------------------------------------------------
Current thread:
- RE: Hacking to Xp box, (continued)
- RE: Hacking to Xp box Omar A. Herrera (Sep 02)
- RE: Hacking to Xp box Michael Gargiullo (Sep 02)
- RE: Hacking to Xp box Omar A. Herrera (Sep 03)
- RE: Hacking to Xp box Enrique A. Sanchez Montellano (Sep 03)
- RE: Hacking to Xp box Michael Gargiullo (Sep 02)
- RE: Hacking to Xp box Josh perrymon (Sep 02)
- RE: Hacking to Xp box John Forristel (SunGard-Chico) (Sep 02)
- RE: Hacking to Xp box Eduardo Suzuki (Sep 03)
- RE: Hacking to Xp box Marco Monicelli (Sep 05)
- RE: Hacking to Xp box chad (Sep 03)
- RE: Hacking to Xp box Eduardo Suzuki (Sep 05)
- RE: Hacking to Xp box Marco Monicelli (Sep 05)
- RE: Hacking to Xp box McKinley, Jackson (Sep 05)
- Re: Hacking to Xp box Kelly Scroggins (Sep 06)
- Re: Hacking to Xp box Marco Monicelli (Sep 07)
- RE: Hacking to Xp box Steve.Cummings (Sep 06)
- RE: Hacking to Xp box Enrique A. Sanchez Montellano (Sep 06)
- Re: Hacking to Xp box Susan Bradley, CPA aka Ebitz - SBS Rocks [MVP] (Sep 06)
- Re: Hacking to Xp box Marco Monicelli (Sep 06)
- Re: Hacking to Xp box Marco Monicelli (Sep 06)