Penetration Testing mailing list archives
Re: Hacking to Xp box
From: Marco Monicelli <marco.monicelli () marcegaglia com>
Date: 06-Sep-2005 11:08:36 CEDT
As far as claimed by the author, this patch should enable back the RAW sockets sending. Never tested though. http://mitglied.lycos.de/lvllord/download-mirror.htm You can use it by command line or in a batch file.... Cheers Marco Inside of a firm ICMP probably can't be be blocked as it's needed for Group policy. If XP SP2 with 05-019... Raw sockets can't be reenabled via command line... at least not the one that worked pre 05-019. You know of a new one? -------- Original Message -------- Subject: Raw sockets, MS05-019 and Windows Firewall -- Summary Date: Mon, 25 Apr 2005 14:33:01 -0700 From: Robin Keir <robin () KEIR NET> Reply-To: Windows NTBugtraq Mailing List <NTBUGTRAQ () LISTSERV NTBUGTRAQ COM> To: NTBUGTRAQ () LISTSERV NTBUGTRAQ COM With the advent of XP SP2 and the recent MS05-019 patch, using raw sockets for scanning from a Windows platform has proven to be very problematic. I thought I would summarize the situation. Based upon the presence of MS05-019 and the state of the Windows Firewall service(s) we have to decide whether we need to stop or start the firewall service(s). Even then there may still be issues. The logic is as follows: Windows 2000 is unaffected. It fully supports all raw socket actions and since it doesn't have the Windows Firewall/ICF we don't have any of those associated issues. XP SP0 should have the firewall stopped ("net stop sharedaccess"). Even though TCP raw sockets are unaffected by the firewall the ALG service, which is intimately tied to the firewall service on XP, prevents discovery of several ports such as 21, 389, 1002 and 1720 when using TCP raw sockets. Stopping the sharedaccess service thus automatically stops the ALG service and we're good to go. XP SP1 *without* MS05-019 functions the same as XP SP0. XP SP1 *with* MS05-019 needs to have the sharedaccess firewall service *running* (see http://support.microsoft.com/kb/897656) otherwise TCP raw sockets are blocked. Because the sharedaccess service needs to be running to enable sending of TCP packets using raw sockets we have the problem with the ALG service blocking sending to certain ports, but it's better than nothing. XP SP2 *without* MS05-019 functions the same as XP SP1 without the patch apart from a driver-level restriction on the number of in-the-process-of-connecting TCP connections. This can affect regular socket style scanning. The only known workaround to the driver issue is a TCPIP.SYS hack. XP SP2 *with* MS05-019 is unusable for raw-socket TCP scanning. It totally blocks TCP raw sockets with or without the firewall enabled. Windows Server 2003 acts like XP SP0. The ALG service, which is now no longer tied to the sharedaccess (Windows Firewall) service, should be stopped ("net stop alg"). What a mess :-) -- Robin Marco Monicelli wrote:
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). 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.... 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). 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. 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 ----------------------------------------------------------------------------
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-- 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 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)