Doug Monroe <monwel@interhack.net> said: > "http-equiv@excite.com" wrote: > > > > Tuesday, July 23, 2002 > > Trivial silent delivery and installation of an executable on a target > > computer. This can be accomplished with the default installation of > > the mail client Eudora 5.1.1: > > 'allow executables in HTML content' DISABLED > > 'use Microsoft viewer' ENABLED > [snip] > > Working Example: > [snip] > > http://www.malware.com/boodora.txt > > > > Notes: disable 'use Microsoft viewer' > > A Eudora expert I am not, but I suppose one could also change > HKCU/software/qualcomm/eudora/launchmanager/path#2 > from > "c:\windows\application data\qualcomm\eudora\embedded" > or > "c:\program files\qualcomm\eudora pro\embedded" > to some other, non-default folder name. > New folder must exist before running eudora again. > > And... add mhtml to "WarnExtentions#X" key values? Doug, excellent point. 1. Yes, if you can relocate the embedded folder. Better. 2. No. adding warnings to extensions appears to be useless: Just tested something here. Typically IE can or will open files depending what the contents are regardless of the extension that it is: <html> tag in a gif or some other file type should or can be rendered by IE for what the contents are, not the extension. New Note 25.7.02: trying that with the above demo, creating & depositing only malware.exe and malware [no file exetension] yielded some very interesting results. <META http-equiv=refresh content="1; url=file://C:\WINDOWS\Application Data\Qualcomm\Eudora\Embedded\malware"> Expecting IE to spring open with the non-extension'd mhtml file fully functional, we find that in fact it does not. We find that the malware.exe is immediately executed. Removing the mhtml file from the embedded folder and leaving only malware.exe in there, the meta refresh pointing to 'malware' only [no extension at all] appears to execute the *.exe directly -- no need for the mhtml file at all. Could be an anomaly with this machine, but simply send yourself the meta refresh pointing to malware minus extension, place an executable with the same name in the embedded folder and see if it executes. No time right now to grind it into powder. -- http://www.malware.com
