Summary
Tiny.D, a variant of the Tiny family, has a very small amount of virus code. This variant of Tiny shows an annoying message that is triggered by certain conditions.
Removal
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First, check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.
Technical Details
Tiny.D drops a copy of itself in the Windows System directory as follows:
- %sysdir%\winalert.exe
As a part of Tiny.D's installation routine it adds the following registry entry to enable its automatic execution upon Windows boot up:
- HKLM\Software\Microsoft\Windows\CurrentVersion\Run"Windows Update Notifier" = "%sysdir%\winalert.exe"
Tiny.D checks for the following mutex to ensure that only one instance of itself is running in memory:
- "[Critical_Alert]"
Payload
If any of the following conditions is fulfilled a message will be pop up:
- Day is greater than 20
- Month is not November
- Year is not 2006
Here is the screenshot of the message:
Tiny.D will continually check for the said condition every 10 seconds. But once a message as been shown it will pause for 1 hour before resuming its checking.
Tiny.D is encrypted using xor with 0x8C as its key.
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