Analysis translation test
This commit is contained in:
Félix Aime
@ -10,6 +10,8 @@ import subprocess as sp
|
||||
import json
|
||||
import pydig
|
||||
import os
|
||||
import re
|
||||
import sys
|
||||
|
||||
|
||||
class ZeekEngine(object):
|
||||
@ -24,10 +26,17 @@ class ZeekEngine(object):
|
||||
self.files = []
|
||||
self.whitelist = []
|
||||
|
||||
# Get analysis configuration
|
||||
# Get analysis and userlang configuration
|
||||
self.heuristics_analysis = get_config(("analysis", "heuristics"))
|
||||
self.iocs_analysis = get_config(("analysis", "iocs"))
|
||||
self.whitelist_analysis = get_config(("analysis", "whitelist"))
|
||||
self.userlang = get_config(("frontend", "user_lang"))
|
||||
|
||||
# Load template language
|
||||
if not re.match("^[a-z]{2,3}$", self.userlang):
|
||||
self.userlang = "en"
|
||||
with open(os.path.join(os.path.dirname(os.path.realpath(sys.argv[0])), "lang/{}.json".format(self.userlang))) as f:
|
||||
self.template = json.load(f)["alerts"]
|
||||
|
||||
def fill_dns(self, dir):
|
||||
"""
|
||||
@ -99,47 +108,41 @@ class ZeekEngine(object):
|
||||
# Check for UDP / ICMP (strange from a smartphone.)
|
||||
if c["proto"] in ["UDP", "ICMP"]:
|
||||
c["alert_tiggered"] = True
|
||||
self.alerts.append({"title": "{} communication going outside the local network to {}.".format(c["proto"].upper(), c["resolution"]),
|
||||
"description": "The {} protocol is commonly used in internal networks. Please, verify if the host {} leveraged other alerts which may ".format(c["proto"].upper(), c["resolution"])
|
||||
+ "indicates a possible malicious behavior.",
|
||||
"host": c["resolution"],
|
||||
self.alerts.append({"title": self.template["PROTO-01"]["title"].format(c["proto"].upper(), c["resolution"]),
|
||||
"description": self.template["PROTO-01"]["description"].format(c["proto"].upper(), c["resolution"]),
|
||||
"host": c["resolution"],
|
||||
"level": "Moderate",
|
||||
"id": "PROTO-01"})
|
||||
# Check for use of ports over 1024.
|
||||
if c["port_dst"] >= max_ports:
|
||||
c["alert_tiggered"] = True
|
||||
self.alerts.append({"title": "{} connection to {} to a port over or equal to {}.".format(c["proto"].upper(), c["resolution"], max_ports),
|
||||
"description": "{} connections have been seen to {} by using the port {}. The use of non-standard port can be sometimes associated to malicious activities. ".format(c["proto"].upper(), c["resolution"], c["port_dst"])
|
||||
+ "We recommend to check if this host has a good reputation by looking on other alerts and search it on the internet.",
|
||||
"host": c["resolution"],
|
||||
self.alerts.append({"title": self.template["PROTO-02"]["title"].format(c["proto"].upper(), c["resolution"], max_ports),
|
||||
"description": self.template["PROTO-02"]["description"].format(c["proto"].upper(), c["resolution"], c["port_dst"]),
|
||||
"host": c["resolution"],
|
||||
"level": "Low",
|
||||
"id": "PROTO-02"})
|
||||
# Check for use of HTTP.
|
||||
if c["service"] == "http" and c["port_dst"] == http_default_port:
|
||||
c["alert_tiggered"] = True
|
||||
self.alerts.append({"title": "HTTP communications have been done to the host {}".format(c["resolution"]),
|
||||
"description": "Your device exchanged with the host {} by using HTTP, an unencrypted protocol. ".format(c["resolution"])
|
||||
+ "Even if this behavior is not malicious by itself, it is unusual to see HTTP communications issued from smartphone applications "
|
||||
+ "running in the background. Please check the host reputation by searching it on the internet.",
|
||||
"host": c["resolution"],
|
||||
self.alerts.append({"title": self.template["PROTO-03"]["title"].format(c["resolution"]),
|
||||
"description": self.template["PROTO-03"]["description"].format(c["resolution"]),
|
||||
"host": c["resolution"],
|
||||
"level": "Low",
|
||||
"id": "PROTO-03"})
|
||||
|
||||
# Check for use of HTTP on a non standard port.
|
||||
if c["service"] == "http" and c["port_dst"] != http_default_port:
|
||||
c["alert_tiggered"] = True
|
||||
self.alerts.append({"title": "HTTP communications have been seen to the host {} on a non standard port ({}).".format(c["resolution"], c["port_dst"]),
|
||||
"description": "Your device exchanged with the host {} by using HTTP, an unencrypted protocol on the port {}. ".format(c["resolution"], c["port_dst"])
|
||||
+ "This behavior is quite unusual. Please check the host reputation by searching it on the internet.",
|
||||
"host": c["resolution"],
|
||||
self.alerts.append({"title": self.template["PROTO-04"]["title"].format(c["resolution"], c["port_dst"]),
|
||||
"description": self.template["PROTO-04"]["description"].format(c["resolution"], c["port_dst"]),
|
||||
"host": c["resolution"],
|
||||
"level": "Moderate",
|
||||
"id": "PROTO-04"})
|
||||
# Check for non-resolved IP address.
|
||||
if c["ip_dst"] == c["resolution"]:
|
||||
c["alert_tiggered"] = True
|
||||
self.alerts.append({"title": "The server {} hasn't been resolved by any DNS query during the session".format(c["ip_dst"]),
|
||||
"description": "It means that the server {} is likely not resolved by any domain name or the resolution has already been cached by ".format(c["ip_dst"])
|
||||
+ "the device. If the host appears in other alerts, please check it.",
|
||||
self.alerts.append({"title": self.template["PROTO-05"]["title"].format(c["ip_dst"]),
|
||||
"description": self.template["PROTO-05"]["description"].format(c["ip_dst"]),
|
||||
"host": c["ip_dst"],
|
||||
"level": "Low",
|
||||
"id": "PROTO-05"})
|
||||
@ -159,10 +162,8 @@ class ZeekEngine(object):
|
||||
for host in bl_hosts:
|
||||
if c["ip_dst"] == host[0]:
|
||||
c["alert_tiggered"] = True
|
||||
self.alerts.append({"title": "A connection has been made to {} ({}) which is tagged as {}.".format(c["resolution"], c["ip_dst"], host[1].upper()),
|
||||
"description": "The host {} has been explicitly blacklisted for malicious activities. Your device is likely compromised ".format(c["ip_dst"])
|
||||
+ "and needs to be investigated more deeply by IT security professionals.",
|
||||
|
||||
self.alerts.append({"title": self.template["IOC-01"]["title"].format(c["resolution"], c["ip_dst"], host[1].upper()),
|
||||
"description": self.template["IOC-01"]["description"].format(c["ip_dst"]),
|
||||
"host": c["resolution"],
|
||||
"level": "High",
|
||||
"id": "IOC-01"})
|
||||
@ -171,10 +172,8 @@ class ZeekEngine(object):
|
||||
for cidr in bl_cidrs:
|
||||
if IPAddress(c["ip_dst"]) in cidr[0]:
|
||||
c["alert_tiggered"] = True
|
||||
self.alerts.append({"title": "Communication to {} under the CIDR {} which is tagged as {}.".format(c["resolution"], cidr[0], cidr[1].upper()),
|
||||
"description": "The server {} is hosted under a network which is known to host malicious activities. Even if this behavior is not malicious by itself, ".format(c["resolution"])
|
||||
+ "you need to check if other alerts are also mentioning this host. If you have some doubts, please "
|
||||
+ "search this host on the internet to see if its legit or not.",
|
||||
self.alerts.append({"title": self.template["IOC-02"]["title"].format(c["resolution"], cidr[0], cidr[1].upper()),
|
||||
"description": self.template["IOC-02"]["description"].format(c["resolution"]),
|
||||
"host": c["resolution"],
|
||||
"level": "Moderate",
|
||||
"id": "IOC-02"})
|
||||
@ -183,42 +182,37 @@ class ZeekEngine(object):
|
||||
if c["resolution"].endswith(domain[0]):
|
||||
if domain[1] != "tracker":
|
||||
c["alert_tiggered"] = True
|
||||
self.alerts.append({"title": "A DNS request have been done to {} which is tagged as {}.".format(c["resolution"], domain[1].upper()),
|
||||
"description": "The domain name {} seen in the capture has been explicitly tagged as malicious. This indicates that ".format(c["resolution"])
|
||||
+ "your device is likely compromised and needs to be investigated deeply.",
|
||||
self.alerts.append({"title": self.template["IOC-03"]["title"].format(c["resolution"], domain[1].upper()),
|
||||
"description": self.template["IOC-03"]["description"].format(c["resolution"]),
|
||||
"host": c["resolution"],
|
||||
"level": "High",
|
||||
"id": "IOC-03"})
|
||||
else:
|
||||
c["alert_tiggered"] = True
|
||||
self.alerts.append({"title": "A DNS request have been done to {} which is tagged as {}.".format(c["resolution"], domain[1].upper()),
|
||||
"description": "The domain name {} seen in the capture has been explicitly tagged as a Tracker. This ".format(c["resolution"])
|
||||
+ "indicates that one of the active apps is geo-tracking your moves.",
|
||||
self.alerts.append({"title": self.template["IOC-04"]["title"].format(c["resolution"], domain[1].upper()),
|
||||
"description": self.template["IOC-04"]["description"].format(c["resolution"]),
|
||||
"host": c["resolution"],
|
||||
"level": "Moderate",
|
||||
"id": "IOC-03"})
|
||||
"id": "IOC-04"})
|
||||
# Check for blacklisted FreeDNS.
|
||||
for domain in bl_freedns:
|
||||
if c["resolution"].endswith("." + domain[0]):
|
||||
c["alert_tiggered"] = True
|
||||
self.alerts.append({"title": "A DNS request have been done to the domain {} which is a Free DNS.".format(c["resolution"]),
|
||||
"description": "The domain name {} is using a Free DNS service. This kind of service is commonly used by cybercriminals ".format(c["resolution"])
|
||||
+ "or state-sponsored threat actors during their operations. It is very suspicious that an application running in background use this kind of service, please investigate.",
|
||||
self.alerts.append({"title": self.template["IOC-05"]["title"].format(c["resolution"]),
|
||||
"description": self.template["IOC-05"]["description"].format(c["resolution"]),
|
||||
"host": c["resolution"],
|
||||
"level": "Moderate",
|
||||
"id": "IOC-04"})
|
||||
"id": "IOC-05"})
|
||||
|
||||
# Check for suspect tlds.
|
||||
for tld in bl_tlds:
|
||||
if c["resolution"].endswith(tld[0]):
|
||||
c["alert_tiggered"] = True
|
||||
self.alerts.append({"title": "A DNS request have been done to the domain {} which contains a suspect TLD.".format(c["resolution"]),
|
||||
"description": "The domain name {} is using a suspect Top Level Domain ({}). Even not malicious, this non-generic TLD is used regularly by cybercrime ".format(c["resolution"], tld[0])
|
||||
+ "or state-sponsored operations. Please check this domain by searching it on an internet search engine. If other alerts are related to this "
|
||||
+ "host, please consider it as very suspicious.",
|
||||
self.alerts.append({"title": self.template["IOC-06"]["title"].format(c["resolution"]),
|
||||
"description": self.template["IOC-06"]["description"].format(c["resolution"], tld[0]),
|
||||
"host": c["resolution"],
|
||||
"level": "Low",
|
||||
"id": "IOC-05"})
|
||||
"id": "IOC-06"})
|
||||
|
||||
# Check for use of suspect nameservers.
|
||||
try:
|
||||
@ -230,13 +224,11 @@ class ZeekEngine(object):
|
||||
for ns in bl_nameservers:
|
||||
if name_servers[0].endswith(".{}.".format(ns[0])):
|
||||
c["alert_tiggered"] = True
|
||||
self.alerts.append({"title": "The domain {} is using a suspect nameserver ({}).".format(c["resolution"], name_servers[0]),
|
||||
"description": "The domain name {} is using a nameserver that has been explicitly tagged to be associated to malicious activities. ".format(c["resolution"])
|
||||
+ "Many cybercriminals and state-sponsored threat actors are using this kind of registrars because they allow cryptocurrencies and anonymous payments. It"
|
||||
+ " is adviced to investigate on this domain and the associated running application by doing a forensic analysis of the phone.",
|
||||
self.alerts.append({"title": self.template["IOC-07"]["title"].format(c["resolution"], name_servers[0]),
|
||||
"description": self.template["IOC-07"]["description"].format(c["resolution"]),
|
||||
"host": c["resolution"],
|
||||
"level": "Moderate",
|
||||
"id": "IOC-06"})
|
||||
"id": "IOC-07"})
|
||||
|
||||
def files_check(self, dir):
|
||||
"""
|
||||
@ -268,12 +260,11 @@ class ZeekEngine(object):
|
||||
if f["sha1"] == cert[0]:
|
||||
host = self.resolve(f["ip_dst"])
|
||||
c["alert_tiggered"] = True
|
||||
self.alerts.append({"title": "A certificate associated to {} activities have been found in the communication to {}.".format(cert[1].upper(), host),
|
||||
"description": "The certificate ({}) associated to {} has been explicitly tagged as malicious. This indicates that ".format(f["sha1"], host)
|
||||
+ "your device is likely compromised and need a forensic analysis.",
|
||||
self.alerts.append({"title": self.template["IOC-08"]["title"].format(cert[1].upper(), host),
|
||||
"description": self.template["IOC-08"]["description"].format(f["sha1"], host),
|
||||
"host": host,
|
||||
"level": "High",
|
||||
"id": "IOC-07"})
|
||||
"id": "IOC-08"})
|
||||
|
||||
def ssl_check(self, dir):
|
||||
"""
|
||||
@ -306,30 +297,24 @@ class ZeekEngine(object):
|
||||
# Check for non generic SSL port.
|
||||
if cert["port"] not in ssl_default_ports:
|
||||
c["alert_tiggered"] = True
|
||||
self.alerts.append({"title": "SSL connection done on a non standard port ({}) to {}".format(cert["port"], host),
|
||||
"description": "It is not common to see SSL connections issued from smartphones using non-standard ports. Even this can be totally legit,"
|
||||
+ " we recommend to check the reputation of {}, by looking at its WHOIS record, the associated autonomus system, its creation date, and ".format(host)
|
||||
+ " by searching it the internet.",
|
||||
self.alerts.append({"title": self.template["SSL-01"]["title"].format(cert["port"], host),
|
||||
"description": self.template["SSL-01"]["description"].format(host),
|
||||
"host": host,
|
||||
"level": "Moderate",
|
||||
"id": "SSL-01"})
|
||||
# Check Free SSL certificates.
|
||||
if cert["issuer"] in free_issuers:
|
||||
c["alert_tiggered"] = True
|
||||
self.alerts.append({"title": "An SSL connection to {} is using a free certificate.".format(host),
|
||||
"description": "Free certificates — such as Let's Encrypt — are wildly used by command and control servers associated to "
|
||||
+ "malicious implants or phishing web pages. We recommend to check the host associated to this certificate, "
|
||||
+ "by looking at the domain name, its creation date, or by checking its reputation on the internet.",
|
||||
self.alerts.append({"title": self.template["SSL-02"]["title"].format(host),
|
||||
"description": self.template["SSL-02"]["description"],
|
||||
"host": host,
|
||||
"level": "Moderate",
|
||||
"id": "SSL-02"})
|
||||
# Check for self-signed certificates.
|
||||
if cert["validation_status"] == "self signed certificate in certificate chain":
|
||||
c["alert_tiggered"] = True
|
||||
self.alerts.append({"title": "The certificate associated to {} is self-signed.".format(host),
|
||||
"description": "The use of self-signed certificates is a common thing for attacker infrastructure. We recommend to check the host {} ".format(host)
|
||||
+ "which is associated to this certificate, by looking at the domain name (if any), its WHOIS record, its creation date, and "
|
||||
+ " by checking its reputation on the internet.",
|
||||
self.alerts.append({"title": self.template["SSL-03"]["title"].format(host),
|
||||
"description": self.template["SSL-03"]["description"].format(host),
|
||||
"host": host,
|
||||
"level": "Moderate",
|
||||
"id": "SSL-03"})
|
||||
@ -349,8 +334,8 @@ class ZeekEngine(object):
|
||||
|
||||
for host, nb in hosts.items():
|
||||
if nb >= get_config(("analysis", "max_alerts")):
|
||||
self.alerts.append({"title": "Check alerts for {}".format(host),
|
||||
"description": "Please, check the reputation of the host {}, this one seems to be malicious as it leveraged {} alerts during the session.".format(host, nb),
|
||||
self.alerts.append({"title": self.template["ADV-01"]["title"].format(host),
|
||||
"description": self.template["ADV-01"]["description"].format(host, nb),
|
||||
"host": host,
|
||||
"level": "High",
|
||||
"id": "ADV-01"})
|
||||
|
||||
Reference in New Issue
Block a user