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windows suspicions and weirdness

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I know i could ask on microsoft answers but they never seem to give actual answers.

I have MSE on one machine and i updated the definitions as usual.

However when i did it took an extra long time and i saw wicainventory.exe running as it installed. Never seen that before. Queryappblock.exe also ran around the same time.

Both signatures were microsoft and the MD5s of the processes(at least as presented for inspection) seemed to be legit. I just have no idea why theyd run with one MSE update but not all.

Any idea why this would occur? Sophisticated back door disguised as MSE definitions? Ive heard of disguised Windows Updates being used to deliver malware but not MSE.

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Windows Update doesn't deliver malware.


Malware can use the Background Intelligent Transfer Service (BITS) to download other malicious files.


While Windows Update uses BITS, BITS is not Windows Update.  It is only a component of the process.

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