Re: Bogus mails from hijacked accounts

2010-03-13 Thread Benny Pedersen
On lør 13 mar 2010 02:14:02 CET, Michelle Konzack wrote The roblem is, accourding to the RFCs, ISP must have an abuse address, but do you have ever tried this with a corporated domain? Even postmaster is rejected on most domains. report them on rfc-ignorant.org Ome tim ago we had a problem

Re: Bogus mails from hijacked accounts

2010-03-13 Thread Michelle Konzack
Good evening, Am 2010-03-13 14:46:35, schrieb Benny Pedersen: report them on rfc-ignorant.org I know it, but the way you have to report it is to long... Ome tim ago we had a problem on a bnch of Debian mailinglists with a persupermarket and after the ISP was not responsive, I have

Re: Bogus mails from hijacked accounts

2010-03-12 Thread ram
On Wed, 2010-03-10 at 13:37 -0600, Dennis B. Hopp wrote: We seem to be having a problem where clients that we interact with regularly are having their hotmail/gmail/yahoo accounts hijacked. We are receiving e-mails from their accounts that legitimately go through the correct servers

Re: Bogus mails from hijacked accounts

2010-03-12 Thread Dennis B. Hopp
describe FORGED_HOTMAIL Hotmail with non-Hotmail Reply-to address header __FORGED_HM1 From ~= /\...@hotmail\.com/i header __FORGED_HM2 Reply-to ~= /\...@hotmail\.com/i meta FORGED_HOTMAIL (__FORGED_HM1 !__FORGED_HM2) scoreFORGED_HOTMAIL 5.0 and write cookie

Re: [sa] Re: Bogus mails from hijacked accounts

2010-03-12 Thread Charles Gregory
On Fri, 12 Mar 2010, Dennis B. Hopp wrote: describe FORGED_YAHOO Yahoo with non-Yahoo Reply-to address header __FORGED_YH1 From =~ /\...@yahoo\.com/i header __FORGED_YH2 Reply-to =~ /\...@yahoo\.com/i meta FORGED_YAHOO (__FORGED_YH1 !__FORGED_YH2) The problem with this

Re: [sa] Re: Bogus mails from hijacked accounts

2010-03-12 Thread Dennis B. Hopp
The problem with this is that the !__FORGED_YH2 matches when there is *NO* Reply-To header at all! You need something like this: header __FORGED_YH2 Reply-To =~ /\@([^y]|y[^a]|ya[^h]|yah[^o])/i meta FORGED_YAHOO (__FORGED_YH1 __FORGED_YH2) (remove the negation from the meta)

Re: [sa] Re: Bogus mails from hijacked accounts

2010-03-12 Thread Dennis B. Hopp
On Fri, 2010-03-12 at 12:52 -0600, Dennis B. Hopp wrote: The problem with this is that the !__FORGED_YH2 matches when there is *NO* Reply-To header at all! You need something like this: header __FORGED_YH2 Reply-To =~ /\@([^y]|y[^a]|ya[^h]|yah[^o])/i meta FORGED_YAHOO

Re: [sa] Re: Bogus mails from hijacked accounts

2010-03-12 Thread Karsten Bräckelmann
On Fri, 2010-03-12 at 13:19 -0500, Charles Gregory wrote: describe FORGED_YAHOO Yahoo with non-Yahoo Reply-to address header __FORGED_YH1 From =~ /\...@yahoo\.com/i header __FORGED_YH2 Reply-to =~ /\...@yahoo\.com/i meta FORGED_YAHOO (__FORGED_YH1 !__FORGED_YH2)

Re: Bogus mails from hijacked accounts

2010-03-12 Thread Michelle Konzack
Hello, Am 2010-03-12 13:38:57, schrieb Benny Pedersen: On tor 11 mar 2010 19:52:01 CET, Michelle Konzack wrote I mean, on one of my domains tdwave.net it should be ALWAYS the same From: and Reply-To:. i have a plugin that does this, contact me offlist if you like to have it, its alpha

Re: Bogus mails from hijacked accounts

2010-03-12 Thread Michelle Konzack
Hello, Am 2010-03-12 18:24:14, schrieb ram: Why only free accounts , The 419'ers hijack legitimate corporate accounts too. Again , As Ips have good reputation and the mails land in the inbox I think the only way of handling this to send proper abuse reports Probably the free mail

Re: Bogus mails from hijacked accounts

2010-03-12 Thread hamann . w
Michelle Konzack wrote: I mean exactly, IF Reply-To: is set, verify, that it match the sender, otherwise reject if it does not match From:. Thanks, Greetings and nice Day/Evening Michelle Konzack Systemadministrator 24V Electronic Engineer Tamay Dogan Network Debian

Re: Bogus mails from hijacked accounts

2010-03-11 Thread Ned Slider
David B Funk wrote: On Wed, 10 Mar 2010, Dennis B. Hopp wrote: I have put a sample at: http://pastebin.com/9BDXrxmm Note I did change the real e-mail address in this message but the hotmail address used is valid just masked. Look at that X-Originating-IP: [41.155.87.236] header, its a

Re: Bogus mails from hijacked accounts

2010-03-11 Thread Brian
On Thu, 2010-03-11 at 12:26 +, Ned Slider wrote: David B Funk wrote: On Wed, 10 Mar 2010, Dennis B. Hopp wrote: I have put a sample at: http://pastebin.com/9BDXrxmm Note I did change the real e-mail address in this message but the hotmail address used is valid just masked.

Re: Bogus mails from hijacked accounts

2010-03-11 Thread Dennis B. Hopp
1) Spammers rotate sender addresses and hijacked account info more often than most of us change our underwear. An account *may* get reused; chances are it'll be months before it does, and the spammers will have rotated through hundreds or thousands of others - both phish-cracked and

Re: Bogus mails from hijacked accounts

2010-03-11 Thread Dennis B. Hopp
Its not conditional, just using a meta rule and negating the Reply-to test in the meta: describe FORGED_HOTMAIL Hotmail with non-Hotmail Reply-to address header __FORGED_HM1 From ~= /\...@hotmail\.com/i header __FORGED_HM2 Reply-to ~= /\...@hotmail\.com/i meta

Re: Bogus mails from hijacked accounts

2010-03-11 Thread Brian
On Thu, 2010-03-11 at 07:55 -0600, Dennis B. Hopp wrote: 1) Spammers rotate sender addresses and hijacked account info more often than most of us change our underwear. An account *may* get reused; chances are it'll be months before it does, and the spammers will have rotated through

Re: Bogus mails from hijacked accounts

2010-03-11 Thread Kris Deugau
Dennis B. Hopp wrote: I don't want to blacklist the address, hence the reason why in my original e-mail I said other then blacklisting. Whups, got your original message confused with something you replied with later. I know blacklisting would block these bogus e-mails as well as legit

Re: Bogus mails from hijacked accounts

2010-03-11 Thread Martin Gregorie
On Thu, 2010-03-11 at 07:55 -0600, Dennis B. Hopp wrote: I'm going to look at what Martin suggested and compare it to what samples I have. FWIW, I have 2 or three portmanteau rules that are effectively collections of misspelled words (such as v1agra, improove, ...), medspamming phrases,

Re: Bogus mails from hijacked accounts

2010-03-11 Thread Martin Gregorie
On Thu, 2010-03-11 at 10:22 -0500, Kris Deugau wrote: Ouch. :( Offhand, I'd say you might as well go ahead and blacklist them anyway, because if the passwords on these freemail accounts have been changed, I don't think there's much chance the original users will get access back. It

Re: Bogus mails from hijacked accounts

2010-03-11 Thread Dave Pooser
A scam of this type needs to be pretty tightly targeted to work. The scammer would need at least a matched pair of addresses and a good probability that the supposed sender could be somewhere near the place where the alleged robbery was said to have happened. If I've got access to your

Re: Bogus mails from hijacked accounts

2010-03-11 Thread Martin Gregorie
On Thu, 2010-03-11 at 11:56 -0600, Dave Pooser wrote: A scam of this type needs to be pretty tightly targeted to work. The scammer would need at least a matched pair of addresses and a good probability that the supposed sender could be somewhere near the place where the alleged robbery was

Re: Bogus mails from hijacked accounts

2010-03-11 Thread Dennis B. Hopp
I don't think the accounts were hijacked: the headers showed that the messages the OP posted were not sent from the domain hosting the mail accounts. It looked to me as if somebody has sold on lists of valid hotmail etc. accounts. I smell an inside job, or at least some careful

Re: Bogus mails from hijacked accounts

2010-03-11 Thread Dennis B. Hopp
...and I suppose the same would apply to social networks. I don't use either, so am somewhat clueless about what goodies are available if you can access their accounts. I have some free e-mail accounts that I use as throw away accounts. When a site just HAS to have a valid e-mail so you can

Re: Bogus mails from hijacked accounts

2010-03-11 Thread Fosforo
I've seen an increase of pop3 dictionary attacks. The cracking daemons usually are running from china. []s Fosforo -- O caminho do homem justo é rodeado por todos os lados pelas injustiças dos egoístas e pela tirania dos homens de mal. Abençoado é aquele que, em nome da caridade e da boa-vontade

Re: Bogus mails from hijacked accounts

2010-03-11 Thread Michelle Konzack
Hello, Am 2010-03-10 13:37:20, schrieb Dennis B. Hopp: We seem to be having a problem where clients that we interact with regularly are having their hotmail/gmail/yahoo accounts hijacked. We are receiving e-mails from their accounts that legitimately go through the correct servers

Re: Bogus mails from hijacked accounts

2010-03-11 Thread Michelle Konzack
Hello Martin, Am 2010-03-10 22:13:59, schrieb Martin Gregorie: describe FORGED_HOTMAIL Hotmail with non-Hotmail Reply-to address header __FORGED_HM1 From ~= /\...@hotmail\.com/i header __FORGED_HM2 Reply-to ~= /\...@hotmail\.com/i meta FORGED_HOTMAIL (__FORGED_HM1

Bogus mails from hijacked accounts

2010-03-10 Thread Dennis B. Hopp
We seem to be having a problem where clients that we interact with regularly are having their hotmail/gmail/yahoo accounts hijacked. We are receiving e-mails from their accounts that legitimately go through the correct servers (hotmail,yahoo, etc.) and so they get passed through our spam filters.

Re: Bogus mails from hijacked accounts

2010-03-10 Thread Martin Gregorie
On Wed, 2010-03-10 at 13:37 -0600, Dennis B. Hopp wrote: Obviously we just have to tell the clients that they need to deal with the various e-mail providers, but is there an effective way that I can filter these messages out before my users see them without blacklisting the address? There's

Re: Bogus mails from hijacked accounts

2010-03-10 Thread Dennis B. Hopp
On Wed, 2010-03-10 at 20:22 +, Martin Gregorie wrote: On Wed, 2010-03-10 at 13:37 -0600, Dennis B. Hopp wrote: Obviously we just have to tell the clients that they need to deal with the various e-mail providers, but is there an effective way that I can filter these messages out

Re: Bogus mails from hijacked accounts

2010-03-10 Thread Martin Gregorie
On Wed, 2010-03-10 at 15:08 -0600, Dennis B. Hopp wrote: I meant blacklisting the sender address, not the MTA. From what you're describing the senders are all forged by somebody who bought or stole a list of valid hotmail etc. addresses and the corresponding addresses in your domain, so

Re: Bogus mails from hijacked accounts

2010-03-10 Thread Kris Deugau
Dennis B. Hopp wrote: On Wed, 2010-03-10 at 20:22 +, Martin Gregorie wrote: On Wed, 2010-03-10 at 13:37 -0600, Dennis B. Hopp wrote: Obviously we just have to tell the clients that they need to deal with the various e-mail providers, but is there an effective way that I can filter these

Re: Bogus mails from hijacked accounts

2010-03-10 Thread David B Funk
On Wed, 10 Mar 2010, Dennis B. Hopp wrote: We seem to be having a problem where clients that we interact with regularly are having their hotmail/gmail/yahoo accounts hijacked. We are receiving e-mails from their accounts that legitimately go through the correct servers (hotmail,yahoo, etc.)