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PCAPeek

A proof-of-concept re-assembler for reverse VNC traffic such as IcedID & Qakbot's VNC Backdoors.

Do note that as PoC, PCAPeek offers no guarantees on backwards compatibility and might be modified in the future for additional protocols.

Installation

This utility depends on Npcap for PCAP parsing, which you likely already have installed if you have WireShark.

To download and build this utility using the Go programming language, simply...

go install github.com/0xThiebaut/PCAPeek@latest

Usage

To use PCAPeek, use the --help flag.

PCAPeek --help
PCAPeek is a tool to peek into PCAPs. It doesn't do much besides acting as a proof of concept to reconstruct reverse VNC traffic.


Usage:
  PCAPeek PCAP [PCAP ...] [flags]

Flags:
      --files               Output clipboard files
      --files-dir string    The output directory for the clipboard files (default "./")
      --filter string       A BPF filter to apply on the PCAPs
  -h, --help                help for PCAPeek
      --jpeg                Output JPEG frames
      --jpeg-dir string     The output directory for the JPEG frames (default "./")
      --jpeg-fps int        The number of JPEG frames to output per second (default 0, outputs all frames)
      --jpeg-quality int    The JPEG frame quality percentage (default 100)
      --mjpeg               Output MJPEG videos
      --mjpeg-dir string    The output directory for the MJPEG videos (default "./")
      --mjpeg-fps int       The number of MJPEG frames to output per second (default 10)
      --mjpeg-quality int   The MJPEG video quality percentage (default 100)

Thanks

Thanks to Brad Duncan (Malware-Traffic-Analysis.net) and Erik Hjelmvik (NETRESEC) for their extensive research on IcedID and its BackConnect protocol.