Date: Sat, 22 May 2004 11:13:22 +0200 From: "M. Boelen" <michael@computerpech.nl> To: RazorOnFreeBSD <yann.luppo@attglobal.net> Cc: freebsd-security@freebsd.org Subject: Re: Hacked or not ? Message-ID: <40AF19B2.1090905@computerpech.nl> In-Reply-To: <021f01c43f3a$e7eb7f40$0f01a8c0@razor> References: <021f01c43f3a$e7eb7f40$0f01a8c0@razor>
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Hi,
Someone else did already told you about Rootkit Hunter, but forget to
say you can install it from the FreeBSD Ports collection
(/usr/ports/security/rkhunter) ;-)
(it's has been added this month, so a lot of FreeBSD users don't know it
yet)
Michael Boelen
Author of Rootkit Hunter
>Hi,
>
>I have a 4.9-STABLE FreeBSD box apparently hacked!
>Yesterday I ran chkrootkit-0.41 and I don't like some of the outputs.
>Those are:
>chfn ... INFECTED
>chsh ... INFECTED
>date ... INFECTED
>ls ... INFECTED
>ps ... INFECTED
>
>But all the rest is NOT PROMISC, NOT INFECTED, NOTHING FOUND, NOTHING DELETED, or NOTHING DETECTED.
>I know by the FreeBSD-Security archives that chkrootkit isn't perfect with FreeBSD versions 5.x
>But I'm not in that case. So I'm a little bit afraid and as a newbie I don't really know what to do....
>I tried "truss ls" to find something strange and here are the outputs with something... suspicious for me:
>
>ioctl(1,TIOCGETA,0xbfbff534) = 0 (0x0)
>ioctl(1,TIOCGWINSZ,0xbfbff5a8) = 0 (0x0)
>getuid() = 0 (0x0)
>readlink("etc/malloc.conf",0xbfbff490,63) ERR#2 'No such file or directory' #SUSPICIOUS
>mmap(0x0,4096,0x3,0x1002,-1,0x0) = 671666176 (0x2808d000)
>break(0x809b000) = 0 (0x0)
>break(0x809c000) = 0 (0x0)
>break(0x809d000) = 0 (0x0)
>break(0x809e000) = 0 (0x0)
>...........................................................................................and so on!
>
>And if I am an intrusion victim.... what can I do ? How can I restore those files? and how can I find out how this cracker did to break my firewall? I mean where is the security hole?
>PS: After verification on other commands declared not infected I found out this ERR#2 is common.... maybe I have another problem here!
>
>Thanks everyone!
>razor.
>_______________________________________________
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>http://lists.freebsd.org/mailman/listinfo/freebsd-security
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>
>
>
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I will....
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