From owner-freebsd-security@FreeBSD.ORG Sat Jun 12 12:02:01 2004 Return-Path: Delivered-To: freebsd-security@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7483616A4CE for ; Sat, 12 Jun 2004 12:02:01 +0000 (GMT) Received: from ajax.achean.com (ajax.achean.com [212.87.82.16]) by mx1.FreeBSD.org (Postfix) with ESMTP id BDE7943D53 for ; Sat, 12 Jun 2004 12:02:00 +0000 (GMT) (envelope-from jon.mercer@achean.com) Received: from ajax.achean.com (ajax.achean.com [212.87.82.16]) by ajax.achean.com (8.12.11/8.12.11) with ESMTP id i5CC1cVJ003581 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sat, 12 Jun 2004 13:01:38 +0100 (BST) (envelope-from jon.mercer@achean.com) Received: (from www@localhost) by ajax.achean.com (8.12.11/8.12.11/Submit) id i5CC1c2a003580; Sat, 12 Jun 2004 13:01:38 +0100 (BST) (envelope-from jon.mercer@achean.com) X-Authentication-Warning: ajax.achean.com: www set sender to jon.mercer@achean.com using -f Received: from 217.155.191.90 (SquirrelMail authenticated user jon.mercer) by webmail.achean.com with HTTP; Sat, 12 Jun 2004 13:01:38 +0100 (BST) Message-ID: <55017.217.155.191.90.1087041698.squirrel@webmail.achean.com> Date: Sat, 12 Jun 2004 13:01:38 +0100 (BST) From: jon.mercer@achean.com To: freebsd-security@freebsd.org User-Agent: SquirrelMail/1.4.2 MIME-Version: 1.0 Content-Type: text/plain;charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Priority: 1 Importance: High X-Virus-Scanned: clamd / ClamAV version devel-20040529, clamav-milter version 0.71 X-Virus-Status: Clean X-Spam-Status: No, hits=1.6 required=5.0 tests=NO_REAL_NAME,PRIORITY_NO_NAME, X_PRIORITY_HIGH autolearn=no version=2.63-achean_mailfilter_v1.00 X-Spam-Report: * 0.5 X_PRIORITY_HIGH Sent with 'X-Priority' set to high * 0.3 NO_REAL_NAME From: does not include a real name * 0.8 PRIORITY_NO_NAME Message has priority setting, but no X-Mailer X-Spam-Level: * X-Spam-Checker-Version: SpamAssassin 2.63-achean_mailfilter_v1.00 (2004-01-11) on ajax.achean.com Subject: Re: Hacked or not ? X-BeenThere: freebsd-security@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Security issues [members-only posting] List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 12 Jun 2004 12:02:01 -0000 I have seen this as well, it is most likely a false positive. Additionally, slower or more heavily loaded machines seem more likely to generate false positive for LKM. As a side note, there really ought to be a way for admins to double check the output from chkrootkit Google helps little. Any offers..? Jon > Hi all, > > please advice me - I was on holidays for one week. After return I found in security mails from router (chkrootkit) following message: > Checking `lkm'... You have 1 process hidden for readdir command You have 1 process hidden for ps command > Warning: Possible LKM Trojan installed > > It apeared only onece. From previous and next days reports, the message is not present. > > How could I be sure, the machine is not hacked ? > > Many thanks for any response. > > Peter Rosa > > > _______________________________________________ > freebsd-security@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-security > To unsubscribe, send any mail to > "freebsd-security-unsubscribe@freebsd.org" >