If the archive contains a binary related to the "Donut" project, you are likely dealing with a position-independent shellcode generator.
: Run 7z l donut.7z to view file names without extracting. Look for suspicious names like payload.bin , loader.exe , or flag.txt . donut.7z
: In a CTF context, the "flag" is often hidden in the memory of the running process or appended as a comment in the 7z metadata. 5. Conclusion If the archive contains a binary related to
: Extract the contents, bypass any encryption/obfuscation, and retrieve the flag or analyze the payload. 2. Initial Analysis & Extraction : In a CTF context, the "flag" is
: If the 7z contains a loader, use a debugger like x64dbg to find where the shellcode is decrypted in memory.
The first step in any 7z analysis is inspecting the archive metadata and attempting extraction.
: Run the extracted executable in a sandbox (like Any.Run ) to see if it attempts to call out to a Command & Control (C2) server.