Report: Attention! Trojan!
A Trojan has been detected in your GigaMIDI dataset!
Due to the specifics of the protection, I can only provide a picture with its name, the name of the file where the Trojan was detected. and the path in the dataset.
Thank you very much for reporting this issue and for providing the screenshot.
I have now completed a detailed static inspection of the reported file, 9e74d92279b677af901a18d65e123f11.mid, including comparison with an independently downloaded older copy of the same source file.
I was able to identify what is likely causing the Trojan-Downloader.JS.Adload.f detection. The file contains a structurally valid Standard MIDI Format 1 file with 13 tracks, and the MIDI data ends correctly at byte 9219. However, an additional 479 bytes of non-MIDI HTML/JavaScript were appended after the complete MIDI file. This trailing code contains an old TerraVista web-banner script that uses window.open() to reference an external URL.
I also confirmed that two independently obtained copies of the file are byte-for-byte identical, with the same MD5 (9e74d92279b677af901a18d65e123f11) and SHA-256 (140c2938e18a90281232eb579d49328871187e6a07fa0bf1f11441a0802e08a4) hashes. This indicates that the trailing script was already present in the historical source file rather than being introduced through a recent modification of the dataset.
Although the JavaScript is located outside the declared MIDI structure, the security detection is understandable given the presence of this appended script. As a precaution, I will exclude/quarantine this original file from the upcoming GigaMIDI release. We are currently preparing a new version 3.0 of the dataset.
Thank you again for identifying and reporting this. It was very helpful for improving the security and quality control of the dataset.
Just a follow-up after investigating the reported file in more detail.
I was able to identify what likely triggered the Trojan-Downloader.JS.Adload.f detection. The original file, 9e74d92279b677af901a18d65e123f11.mid, contains a valid Standard MIDI Format 1 file with 13 tracks, but an additional 479 bytes of HTML/JavaScript were appended after the MIDI data had already ended.
The appended code appears to be an old TerraVista web-banner script and is outside the declared MIDI structure. I also verified an older independently downloaded copy of the same file, and both copies are byte-for-byte identical, indicating that this trailing content was already present in the historical source file.
As a precaution, the original file will be excluded/quarantined from the upcoming GigaMIDI release.
I have also created a sanitized version containing only the complete valid MIDI data, with the 479 bytes of trailing HTML/JavaScript removed:
9e74d92279b677af901a18d65e123f11_SANITIZED.mid
You can download it here:
https://drive.google.com/file/d/1LpwkRzDNqfmRP3JCCaLBdRzWMv1875be/view?usp=sharing
MD5: 693321b578540d215622d26a3f41f48f
SHA-256: 03d59233cf86f0669ba2187b4baff0cbceffcec381c91213fc77f4a2e30c4788
If possible, could you please scan the sanitized version using the same security software and let me know whether the Trojan-Downloader.JS.Adload.f detection is gone?
That would help us confirm that the appended JavaScript was the specific cause of the original detection.
Thank you again for reporting this and helping us improve the dataset.
"No threats detected." Kaspersky Premium report
p.s. Exhibit No. 0 – A Voice from Amber https://drive.google.com/file/d/1Xf2wdg62J4M08fA_OEKM0fUgb71XmkHi/view?usp=sharing
Thank you very much for checking it with Kaspersky Premium!
That is very helpful. The fact that the sanitized version reports “No threats detected” strongly supports our finding that the "Trojan-Downloader.JS.Adload.f" detection in the original file was caused by the 479 bytes of trailing HTML/JavaScript appended after the valid MIDI data.
We will therefore keep the original file quarantined/excluded from the upcoming GigaMIDI release and retain the sanitized version only if needed.
Thank you again for reporting the issue and for helping us verify the fix. I really appreciate it!
original file: 9e74d92279b677af901a18d65e123f11.mid
original detection: Trojan-Downloader.JS.Adload.f
cause identified: 479 bytes of trailing HTML/JavaScript after the valid MIDI structure
sanitized derivative created
sanitized MD5: 693321b578540d215622d26a3f41f48f
sanitized SHA-256: 03d59233cf86f0669ba2187b4baff0cbceffcec381c91213fc77f4a2e30c4788
user re-scanned sanitized version with Kaspersky Premium: “No threats detected”
original quarantined/excluded from the next release