False positives?

[miskox]

I don't know if these are false positives or not. Please help. I can upload these files if neccessary.

I wanted to scan device F: (USB stick) and it finds a backdoor.bot in C:\_. Please explain/help.

Thank you,

Saso

Malwarebytes' Anti-Malware 1.41

Database version: 3149

Windows 5.1.2600 Service Pack 3

11.11.2009 21:23:09

mbam-log-2009-11-11 (21-23-08).txt

Scan type: Full Scan (F:\|)

Objects scanned: 93148

Time elapsed: 59 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: 1

Files Infected: 5

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:

C:\_ (Backdoor.Bot) -> No action taken. [37425130356668766980808315358085130106514848533751425538066164]

Files Infected:

C:\_\dvd728.txt (Backdoor.Bot) -> No action taken. [37425130356668766980808315358085130106514848533751425538066164]

C:\_\dvd728_051_dfu_eng.pdf (Backdoor.Bot) -> No action taken. [37425130356668766980808315358085130106514848533751425538066164]

C:\_\list.txt (Backdoor.Bot) -> No action taken. [37425130356668766980808315358085130106514848533751425538066164]

C:\_\WIPkozolec1.jpg (Backdoor.Bot) -> No action taken. [37425130356668766980808315358085130106514848533751425538066164]

C:\_\WIPkozolec2.jpg (Backdoor.Bot) -> No action taken. [37425130356668766980808315358085130106514848533751425538066164]

[MysteryFCM]

Could you upload a copy of the files to the following so the analysts can take a look please?

http://uploads.malwarebytes.org

[miskox]

Upload in progress (miskox.zip).

I did some tests:

1. I created a folder "_" (empty folder) without quotation marks and MBA detected it as backdoor.bot

2. I created a folder _X_ (empty folder9 and it was OK (MBAM found nothing)

3. I created a folder _X_ and copied files in it and it was OK (MBAM found nothing)

I will recheck steps above again on monday + another test (scan of C: only) - I can't rememeber the resulsts.

Saso

[MysteryFCM]

Thanks for letting me know.

[miskox]

Update:

I did some tests (again). Here are the results. I performed a full scan of C: :

1. I left a "_" folder with all these files there - MBAM found backdoor.bot

2. I also copied folder "_" to "_X_": MBAM found backdoor.bot in "_" and NOT in "_X_"

3. I renamed "_" to "_X_" found NOTHING.

Hope this helps.

Saso

[MysteryFCM]

I've pinged the def's team concerning this one, they should get back to you shortly.