Got this from NTBugTraq, if it will help you: -------- Original Message -------- From: Russ <Russ.Cooperat_private> Subject: Updated mitigators and cleansing of Nimda To: NTBUGTRAQat_private -----BEGIN PGP SIGNED MESSAGE----- Infection vectors; - ----------------- a) Email as an attachment of MIME audio/x-wav type. b) By browsing an infected webserver with Javascript execution enabled and using a version of IE vulnerable to the exploits discussed in MS01-020 (e.g. IE 5.0 or IE 5.01 without SP2). c) Machine to machine in the form of IIS attacks (primarily attempting to exploit vulnerabilities created by the effects of Code Red II, but also vulnerabilities previously patched by MS00-078) d) Highlighting either a .eml or .nws in Explorer with Active Desktop enabled (W2K/ME/W98 by default) then the THUMBVW.DLL will execute the file and attempt to download the README.EXE referenced in it (depending on your IE version and zone settings). e) Mapped drives. Any infected machine which has mapped network drives will likely infect all of the files on the mapped drive and its subdirectories To prevent yourself from being infected; a) Ensure all IE versions have applied MS01-027 (or are IE 5.01SP2 or above) b) Disable Active Scripting in IE c) Ensure all IIS installations have applied MS01-044 (or at the very least MS01-033) d) Use the CALCS program to modify the permissions on TFTP.EXE to remove all use; CALCS %systemroot%/system32/tftp.exe /D Everyone CALCS %systemroot%/system32/tftp.exe /D System Do the same for CMD.EXE (note, this could be tried with THUMBVM.DLL as well, haven't tried this myself yet) e) Ensure that TFTP is not permitted out through your network gateway (note that newly infected machines may try and TFTP *internally* from some other infected machine you have on your network) f) Modify or remove; HKEY_CLASSES_ROOT\.eml HKEY_CLASSES_ROOT\.nws Cleansing information; - --------------------- Nimda is viral, so while you can remove various files that it drops it probably will not be cleaned completely by manual means. This means you will have to use your AntiVirus vendor's product to completely cleans. a) Load.exe dropped as hidden/system file (probably in %systemroot%) b) Riched20.dll dropped with today's date as hidden/system file. c) Readme.exe dropped in every directory d) Admin.dll dropped in /scripts and/or root directories (not the _vti_bin directories of FrontPage) e) .eml and .nws files dropped in every directory f) Possibly modified your default home page in web dirs. g) Infected numerous files (if not all files) with the 56kb executable. h) Reports of people having files lumped together into .eml files Check with your AV Vendor regularly for updates to the cleansing programs. I would appreciate any reports from AV Vendors as to how complete they feel their cleaners currently are. I will do an update later tonight based on responses. Cheers, Russ - Surgeon General of TruSecure Corporation/NTBugtraq Editor -----BEGIN PGP SIGNATURE----- Version: PGP Personal Privacy 6.5.2 iQCVAwUBO6fIYRBh2Kw/l7p5AQE/ugQAx8+paBZ9jdt5ikstAU9QNHRYfhdDzQ55 1n03W3lH9vEgl2uFZ1NooASAAC1zsO/yeKJcftvjHWosBdXVNNYV3RcRgZ63hvdY 7DlgfuYpBXOPQHCBuQuh0yPOBUbtMJjnEX+d/8opifv18VPbCEWUg8NV5OiFIlEi 6NOlaobfFR4= =U1y0 -----END PGP SIGNATURE----- -----Original Message----- From: Nicholas Janzen [mailto:nj@third-net.com] Sent: Tuesday, September 18, 2001 5:29 PM To: Tracey Losco Cc: Portnoy, Gary; incidentsat_private; 'intrusionsat_private'; securityat_private Subject: Re: CodeBlue finally hitting, or what? I have gotten very simular things, they haven't hit any of the patched systems (patched with Q295534i) But i am currently trying to remove the virus. If anyone knows how to remove this virus, i would appreciate it if you would send info on how to remove it. <snip> ---------------------------------------------------------------------------- This list is provided by the SecurityFocus ARIS analyzer service. For more information on this free incident handling, management and tracking system please see: http://aris.securityfocus.com
This archive was generated by hypermail 2b30 : Tue Sep 18 2001 - 16:34:46 PDT