Trojanized PNGs: When Images Pack a Surprise Payload!
Xavier’s diary entry on a sneaky PNG image got me thinking, so I gave my pngdump.py a makeover. Now it can unearth hidden treasures—or, in this case, a suspicious payload. This PNG file has 11 items, with one being a surprise guest: mysterious data appearing after the IEND chunk!
Hot Take:
Who knew that PNGs could be more than just a collection of pixels and a procrastination tool for digital artists? In the latest cybersecurity twist, we find out that even our beloved PNG files can moonlight as covert Trojan horses. Talk about a career change! Next thing you know, GIFs will be taking over the world.
Key Points:
- Xavier’s diary entry reveals a trojanized PNG file with hidden data.
- The file contains 11 items, with 10 valid and 1 unexpected data item.
- Didier Stevens updates pngdump.py to extract these hidden chunks.
- The unexpected item is hidden after the IEND chunk.
- The updated tool can help identify and extract suspicious data in PNGs.
Already a member? Log in here