Trojan:Android/KabStamper.A
Summary
KabStamper.A is a harmful program that circulated in Japan during the AKB48 (a Japanese pop group) election. The malware modifies images found in the device by overwriting them with a predefined image.
Removal
Once the scan is complete, the F-Secure security product will ask if you want to uninstall the file, move it to the quarantine or keep it installed on your device.
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:
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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.
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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.
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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
KabStamper.A is a harmful program that circulated in Japan during the AKB48 'election.' AKB48 is a Japanese pop group that consists of 48 members. The 'election' was held to select the most popular member who will become the face of the group.
KabStamper.A is distributed via trojanized applications that deliver news and videos about the AKB48 group. Malicious code in the malware is highly destructive; it destroys images found in the sdcard/DCIM/camera folder that stores images taken with the device's camera. Every five minutes, the malware checks this folder and modifies any found image by overwriting it with a predefined image.
Comparison between before and after KabStamper's infection.