# Tune out stock-rule false positives observed on this specific host, so the
# broad netdata "any Falco match" alarm only pages for things worth paging
# for. Uses Falco's own user_* customization macros rather than disabling
# whole rules, so the underlying security check stays active for everything
# else. Add entries here as new noisy defaults turn up - don't let this list
# grow into blinding Falco to anything actually meaningful.

# "Sensitive file opened for reading by non-trusted program" false-positives:
# - pg_isready: fired every ~10s from inbox-zero-db's healthcheck touching
#   /etc/shadow - NSS/libc user-lookup behavior during process init, not
#   credential harvesting.
# - lscr.io/linuxserver/obsidian: fires once per container start from
#   `sed -i s/CORRUPT_FILE/NOPASSWD/g /etc/sudoers` - linuxserver.io's
#   own s6-init NOPASSWD setup, same class of init-time file touch.
- macro: user_known_read_sensitive_files_activities
  condition: >
    (proc.name = pg_isready)
    or (container.image.repository = "lscr.io/linuxserver/obsidian" and proc.name = sed)

# "Fileless execution via memfd_create" fires from nvidia-ctk's
# ldconfig-refresh hook, which runs via memfd_create by design every time
# an NVIDIA-GPU container (e.g. ollama) starts - normal container-toolkit
# behavior, not defense evasion. Scoped to the hook's own parent process
# names rather than the ollama/ollama image, so drift detection stays live
# for anything else that image does.
- macro: known_memfd_execution_processes
  condition: (proc.pname in (nvidia-containe, nvidia-ctk))

# "Drop and execute new binary in container" (output text: "Executing binary
# not part of base image") false-positives on three known-benign sources,
# all confirmed via docker logs falco (2026-08-08 to 2026-08-16):
# - gitea: re-executes itself for git-shell commands (serv/hook/pre-receive/
#   post-receive) over SSH, which looks identical to a dropped binary.
#   Scoped to proc.name=gitea, not the whole container, so this
#   previously-compromised container still gets checked for any OTHER
#   unexpected binary.
# - lscr.io/linuxserver/obsidian: Electron's normal /proc/self/exe
#   self-re-exec pattern (zygote/renderer/utility processes), fires ~6x
#   every time the container is recreated (~daily, likely watchtower).
#   Scoped to the whole image since this is normal Electron startup
#   behavior end to end, not one specific binary.
# - tsl0922/ttyd (Synchronet BBS web terminal): telnet/pv/busybox-extras
#   installed via apk at container start and then used for the BBS's
#   normal telnet workflow. Scoped to those three binaries, not the image,
#   since this is a shell-access container where an unexpected binary is
#   more worth knowing about.
- macro: known_drop_and_execute_activities
  condition: >
    (container.image.repository = "docker.gitea.com/gitea" and proc.name = gitea)
    or (container.image.repository = "lscr.io/linuxserver/obsidian")
    or (container.image.repository = "tsl0922/ttyd" and proc.name in (telnet, pv, busybox-extras))