Spunner:Can we get protection from this? I sold them on
using Blink because of its hardened security (I know it's a
cat-and-mouse game) but we're pretty smart cats!
I don't doubt that, there are so many variants of it, it is sickening. Being able to stop them all is going to be difficult. I have personally sent eEye like 4 different versions of it now (pretty much same general file name) but with different MD5 hashes.
Here are two other versions of it that I found and that I have tickets on pending with Norman. eEye has already sent them in and we are waiting on a signature to be made for them.
Name: AV2009Install_880174.exe
MD5: 2f772504e41a9a0a1b55c564f0601818
Name: AntvrsInstall.exe
MD5: a114da736592860009233c6ddaab4692
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My personal recommendation is to create two rules:
1. One IPS signature that blocks any email attachment with the file extension of: .exe, .dll, .com, .php, and .bat ... you might go as far as to block .txt also.
2. One System Protection signature (Under the "Execution Protection" tab) that keeps anything in Outlook (link, file, etc) from opening IE or Firefox (whatever one your using for your browser) that has the following:
Type of System Resource: Execution
Specifiy the Executable that this rule will protect against: "C:\Program Files\Internet Explorer\iexplore.exe"
- Match the type: Partial
- Do not use executable MD5 (in the bottom part)
Specifiy the Parent Process that this rule will filter against: (This would be the path to the Outlook executable)
- Match type: Wildcard
- Do not use parent process MD5
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I have also gone overboard and made individual new rules that were copies of the top rule (for Adobe Acrobat under the "Execution Protection" tab) but are for blocking the following from opening the "cmd.exe":
Microsoft Word
Microsoft Excel
Microsoft Powerpoint
Windows Word Notepad
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Do you know for a fact there was an actual attachment? If not I will bet on it being imbedded code of some nature: HTML or maybe even scripts imbedded in images (used a lot to bypass Phishing security measures) that ran itself when the pane viewer displayed it. At that point it probably downloaded the executable to your system from the internet and ran it.