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No one else will have a false positive problem with the file TRIANGL4.EXE because they don't have the file.

I created the file years ago using the QB87 (QuickBASIC) compiler. TRIANGL4.EXE is little program to calculate the active aperture of triangle shaped cube corner prisms. What could be more harmless?

To assure than my 11,776 byte .EXE hadn't been invaded by viral material I repeated the creation process today and compared the two files using windiff: identical.

Of course I've run Malwarebytes many times before and it didn't find anything wrong with TRIANGL4.EXE, so why today did it find it to be a Trojan.Downloader?

Below is the logfile. I'm curious to know what Malwarbytes looks for and how TRIANGL4.EXE tricked it.

Malwarebytes' Anti-Malware 1.41

Database version: 2902

Windows 5.1.2600 Service Pack 3

04.Oct.09 06:36:54

mbam-log-2009-10-04 (06-36-43).txt

Scan type: Full Scan (C:\|)

Objects scanned: 199809

Time elapsed: 1 hour(s), 11 minute(s), 25 second(s)

Memory Processes Infected: 0

Memory Modules Infected: 0

Registry Keys Infected: 0

Registry Values Infected: 0

Registry Data Items Infected: 0

Folders Infected: 0

Files Infected: 1

Memory Processes Infected:

(No malicious items detected)

Memory Modules Infected:

(No malicious items detected)

Registry Keys Infected:

(No malicious items detected)

Registry Values Infected:

(No malicious items detected)

Registry Data Items Infected:

(No malicious items detected)

Folders Infected:

(No malicious items detected)

Files Infected:

C:\d2\LANGUAGE\BASIC\TRIANGL4.EXE (Trojan.Downloader) -> No action taken. [4948455830538380756679153780887977806669708301070701524259383018182424230107070








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