LSMS/scripts/search_deleted_exe.py

#!/usr/bin/env python3

# written by sqall
# twitter: https://twitter.com/sqall01
# blog: https://h4des.org
# github: https://github.com/sqall01
#
# Licensed under the MIT License.

"""
Short summary:
Search running programs whose binary was deleted. Indicator of malicious programs.

Requirements:
None
"""

import os

from lib.util import output_finding

# Read configuration.
try:
    from config.config import ALERTR_FIFO, FROM_ADDR, TO_ADDR
    from config.search_deleted_exe import ACTIVATED
except:
    ALERTR_FIFO = None
    FROM_ADDR = None
    TO_ADDR = None
    ACTIVATED = True


def search_deleted_exe_files():

    # Decide where to output results.
    print_output = False
    if ALERTR_FIFO is None and FROM_ADDR is None and TO_ADDR is None:
        print_output = True

    if not ACTIVATED:
        if print_output:
            print("Module deactivated.")
        return

    # Get all suspicious ELF files.
    fd = os.popen("ls -laR /proc/*/exe 2> /dev/null | grep -v memfd: | grep \\(deleted\\)")
    suspicious_exe_raw = fd.read().strip()
    fd.close()

    suspicious_exes = []
    if suspicious_exe_raw.strip():
        suspicious_exes.extend(suspicious_exe_raw.strip().split("\n"))

    if suspicious_exes:
        message = "Deleted executable file(s) found:\n\n"
        message += "\n".join(suspicious_exes)

        output_finding(__file__, message)


if __name__ == '__main__':
    search_deleted_exe_files()