Title:
Anatomy of a Suspicious Container: A Forensic Analysis of the "Nippydrive.jpg" Payload
Authors:
A. Chen, M. V. Patil
Department of Digital Forensics & Cyber Threat Intelligence, CyberSec Labs
Abstract:
The file nippydrive.jpg has recently appeared in multiple threat intelligence feeds as an anomalous JPEG exhibiting non-standard encoding patterns. While visually appearing as a benign low-resolution image, this paper analyzes the file’s internal structure, metadata anomalies, and potential hidden payloads. Using hex dissection, steganalysis, and entropy profiling, we demonstrate that nippydrive.jpg functions as a polyglot container—embedding a ZIP archive and obfuscated PowerShell script within its comment section and trailing bytes. We propose detection signatures and a forensic workflow for identifying similar “Nippydrive-pattern” files. Nippydrive jpg
Keywords: JPEG steganography, polyglot files, cyber threat intelligence, Nippydrive, forensic imaging
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