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mobsf.py
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import json
from datetime import datetime
from html2text import html2text
from converters.models import Finding
class MobSFParser(object):
def get_scan_types(self):
return ["MobSF Scan"]
def get_label_for_scan_types(self, scan_type):
return "MobSF Scan"
def get_description_for_scan_types(self, scan_type):
return "Export a JSON file using the API, api/v1/report_json."
def get_findings(self, filename, test):
tree = filename.read()
try:
data = json.loads(str(tree, 'utf-8'))
except:
data = json.loads(tree)
find_date = datetime.now()
dupes = {}
test_description = ""
if "name" in data:
test_description = "**Info:**\n"
if "packagename" in data:
test_description = "%s **Package Name:** %s\n" % (test_description, data["packagename"])
if "mainactivity" in data:
test_description = "%s **Main Activity:** %s\n" % (test_description, data["mainactivity"])
if "pltfm" in data:
test_description = "%s **Platform:** %s\n" % (test_description, data["pltfm"])
if "sdk" in data:
test_description = "%s **SDK:** %s\n" % (test_description, data["sdk"])
if "min" in data:
test_description = "%s **Min SDK:** %s\n" % (test_description, data["min"])
if "targetsdk" in data:
test_description = "%s **Target SDK:** %s\n" % (test_description, data["targetsdk"])
if "minsdk" in data:
test_description = "%s **Min SDK:** %s\n" % (test_description, data["minsdk"])
if "maxsdk" in data:
test_description = "%s **Max SDK:** %s\n" % (test_description, data["maxsdk"])
test_description = "%s\n**File Information:**\n" % (test_description)
if "name" in data:
test_description = "%s **Name:** %s\n" % (test_description, data["name"])
if "md5" in data:
test_description = "%s **MD5:** %s\n" % (test_description, data["md5"])
if "sha1" in data:
test_description = "%s **SHA-1:** %s\n" % (test_description, data["sha1"])
if "sha256" in data:
test_description = "%s **SHA-256:** %s\n" % (test_description, data["sha256"])
if "size" in data:
test_description = "%s **Size:** %s\n" % (test_description, data["size"])
if "urls" in data:
curl = ""
for url in data["urls"]:
for curl in url["urls"]:
curl = "%s\n" % (curl)
if curl:
test_description = "%s\n**URL's:**\n %s\n" % (test_description, curl)
if "bin_anal" in data:
test_description = "%s \n**Binary Analysis:** %s\n" % (test_description, data["bin_anal"])
mobsf_findings = []
# Mobile Permissions
if "permissions" in data:
# for permission, details in data["permissions"].items():
if isinstance(data["permissions"], list):
for details in data["permissions"]:
mobsf_item = {
"category": "Mobile Permissions",
"title": details.get("name", ""),
"severity": self.getSeverityForPermission(details.get("status")),
"description": "**Permission Type:** " + details.get("name", "") + " (" + details.get("status", "") + ")\n\n**Description:** " + details.get("description", "") + "\n\n**Reason:** " + details.get("reason", ""),
"file_path": "Permissions"
}
mobsf_findings.append(mobsf_item)
else:
for permission, details in list(data["permissions"].items()):
mobsf_item = {
"category": "Mobile Permissions",
"title": permission,
"severity": self.getSeverityForPermission(details.get("status", "")),
"description": "**Permission Type:** " + permission + "\n\n**Description:** " + details.get("description", ""),
"file_path": "Permissions"
}
mobsf_findings.append(mobsf_item)
# Insecure Connections
if "insecure_connections" in data:
for details in data["insecure_connections"]:
insecure_urls = ""
for url in details.split(','):
insecure_urls = insecure_urls + url + "\n"
mobsf_item = {
"category": None,
"title": "Insecure Connections",
"severity": "Low",
"description": insecure_urls,
"file_path": None
}
mobsf_findings.append(mobsf_item)
# Certificate Analysis
if "certificate_analysis" in data:
if data["certificate_analysis"] != {}:
certificate_info = data["certificate_analysis"]["certificate_info"]
for details in data["certificate_analysis"]["certificate_findings"]:
if len(details) == 3:
mobsf_item = {
"category": "Certificate Analysis",
"title": details[2],
"severity": details[0].title(),
"description": details[1] + "\n\n**Certificate Info:** " + certificate_info,
"file_path": None
}
mobsf_findings.append(mobsf_item)
elif len(details) == 2:
mobsf_item = {
"category": "Certificate Analysis",
"title": details[1],
"severity": details[0].title(),
"description": details[1] + "\n\n**Certificate Info:** " + certificate_info,
"file_path": None
}
mobsf_findings.append(mobsf_item)
else:
pass
# Manifest Analysis
if "manifest_analysis" in data:
if data["manifest_analysis"] != {} and isinstance(data["manifest_analysis"], dict):
if data["manifest_analysis"]["manifest_findings"]:
for details in data["manifest_analysis"]["manifest_findings"]:
mobsf_item = {
"category": "Manifest Analysis",
"title": details["title"],
"severity": details["severity"].title(),
"description": details["description"] + "\n\n " + details["name"],
"file_path": "Manifest"
}
mobsf_findings.append(mobsf_item)
else:
for details in data["manifest_analysis"]:
mobsf_item = {
"category": "Manifest Analysis",
"title": details["title"],
"severity": details["stat"].title(),
"description": details["desc"] + "\n\n " + details["name"],
"file_path": "Manifest"
}
mobsf_findings.append(mobsf_item)
# Code Analysis
if "code_analysis" in data:
if data["code_analysis"] != {}:
if data["code_analysis"].get("findings"):
for details in data["code_analysis"]["findings"]:
metadata = data["code_analysis"]["findings"][details]
mobsf_item = {
"category": "Code Analysis",
"title": details,
"severity": metadata["metadata"]["severity"].title(),
"description": metadata["metadata"]["description"],
"file_path": None
}
mobsf_findings.append(mobsf_item)
else:
for details in data["code_analysis"]:
metadata = data["code_analysis"][details]
if metadata.get("metadata"):
mobsf_item = {
"category": "Code Analysis",
"title": details,
"severity": metadata["metadata"]["severity"].title(),
"description": metadata["metadata"]["description"],
"file_path": None
}
mobsf_findings.append(mobsf_item)
# Binary Analysis
if "binary_analysis" in data:
if isinstance(data["binary_analysis"], list):
for details in data["binary_analysis"]:
for binary_analysis_type in details:
if "name" != binary_analysis_type:
mobsf_item = {
"category": "Binary Analysis",
"title": details[binary_analysis_type]["description"].split(".")[0],
"severity": details[binary_analysis_type]["severity"].title(),
"description": details[binary_analysis_type]["description"],
"file_path": details["name"]
}
mobsf_findings.append(mobsf_item)
elif data["binary_analysis"].get("findings"):
for binary_analysis_type, details in list(data["binary_analysis"]["findings"].items()):
# "findings":{
# "Binary makes use of insecure API(s)":{
# "detailed_desc":"The binary may contain the following insecure API(s) _memcpy\n, _strlen\n",
# "severity":"high",
# "cvss":6,
# "cwe":"CWE-676: Use of Potentially Dangerous Function",
# "owasp-mobile":"M7: Client Code Quality",
# "masvs":"MSTG-CODE-8"
# },
mobsf_item = {
"category": "Binary Analysis",
"title": details["detailed_desc"],
"severity": details["severity"].title(),
"description": details["detailed_desc"],
"file_path": None
}
mobsf_findings.append(mobsf_item)
else:
for binary_analysis_type, details in list(data["binary_analysis"].items()):
# "Binary makes use of insecure API(s)":{
# "detailed_desc":"The binary may contain the following insecure API(s) _vsprintf.",
# "severity":"high",
# "cvss":6,
# "cwe":"CWE-676 - Use of Potentially Dangerous Function",
# "owasp-mobile":"M7: Client Code Quality",
# "masvs":"MSTG-CODE-8"
# }
mobsf_item = {
"category": "Binary Analysis",
"title": details["detailed_desc"],
"severity": details["severity"].title(),
"description": details["detailed_desc"],
"file_path": None
}
mobsf_findings.append(mobsf_item)
# specific node for Android reports
if "android_api" in data:
# "android_insecure_random": {
# "files": {
# "u/c/a/b/a/c.java": "9",
# "kotlinx/coroutines/repackaged/net/bytebuddy/utility/RandomString.java": "3",
# ...
# "hu/mycompany/vbnmqweq/gateway/msg/Response.java": "13"
# },
# "metadata": {
# "id": "android_insecure_random",
# "description": "The App uses an insecure Random Number Generator.",
# "type": "Regex",
# "pattern": "java\\.util\\.Random;",
# "severity": "high",
# "input_case": "exact",
# "cvss": 7.5,
# "cwe": "CWE-330 Use of Insufficiently Random Values",
# "owasp-mobile": "M5: Insufficient Cryptography",
# "masvs": "MSTG-CRYPTO-6"
# }
# },
for api, details in list(data["android_api"].items()):
mobsf_item = {
"category": "Android API",
"title": details["metadata"]["description"],
"severity": details["metadata"]["severity"].title(),
"description": "**API:** " + api + "\n\n**Description:** " + details["metadata"]["description"],
"file_path": None
}
mobsf_findings.append(mobsf_item)
# Manifest
if "manifest" in data:
for details in data["manifest"]:
mobsf_item = {
"category": "Manifest",
"title": details["title"],
"severity": details["stat"],
"description": details["desc"],
"file_path": "Manifest"
}
mobsf_findings.append(mobsf_item)
# MobSF Findings
if "findings" in data:
for title, finding in list(data["findings"].items()):
description = title
file_path = None
if "path" in finding:
description = description + "\n\n**Files:**\n"
for path in finding["path"]:
if file_path is None:
file_path = path
description = description + " * " + path + "\n"
mobsf_item = {
"category": "Findings",
"title": title,
"severity": finding["level"],
"description": description,
"file_path": file_path
}
mobsf_findings.append(mobsf_item)
if isinstance(data, list):
for finding in data:
mobsf_item = {
"category": finding["category"],
"title": finding["name"],
"severity": finding["severity"],
"description": finding["description"] + "\n" + "**apk_exploit_dict:** " + str(finding["apk_exploit_dict"]) + "\n" + "**line_number:** " + str(finding["line_number"]),
"file_path": finding["file_object"]
}
mobsf_findings.append(mobsf_item)
for mobsf_finding in mobsf_findings:
title = mobsf_finding["title"]
sev = self.getCriticalityRating(mobsf_finding["severity"])
description = ""
file_path = None
reason = title
if mobsf_finding["category"]:
reason = mobsf_finding["category"] + ' ' + reason
description += "**Category:** " + mobsf_finding["category"] + "\n\n"
description = description + html2text(mobsf_finding["description"])
finding = Finding(
title=title,
cwe=919, # Weaknesses in Mobile Applications
test=test,
description=description,
severity=sev,
references=None,
date=find_date,
static_finding=True,
dynamic_finding=False,
nb_occurences=1,
reason=reason
)
if mobsf_finding["file_path"]:
finding.file_path = mobsf_finding["file_path"]
dupe_key = sev + title + description + mobsf_finding["file_path"]
else:
dupe_key = sev + title + description
if mobsf_finding["category"]:
dupe_key += mobsf_finding["category"]
if dupe_key in dupes:
find = dupes[dupe_key]
if description is not None:
find.description += description
find.nb_occurences += 1
else:
dupes[dupe_key] = finding
return list(dupes.values())
def getSeverityForPermission(self, status):
"""Convert status for permission detection to severity
In MobSF there is only 4 know values for permission,
we map them as this:
dangerous => High (Critical?)
normal => Info
signature => Info (it's positive so... Info)
signatureOrSystem => Info (it's positive so... Info)
"""
if "dangerous" == status:
return "High"
else:
return "Info"
# Criticality rating
def getCriticalityRating(self, rating):
criticality = "Info"
if rating.lower() == "good":
criticality = "Info"
elif rating.lower() == "warning":
criticality = "Low"
elif rating.lower() == "vulnerability":
criticality = "Medium"
else:
criticality = rating.lower().capitalize()
return criticality
def suite_data(self, suites):
suite_info = ""
suite_info += suites["name"] + "\n"
suite_info += "Cipher Strength: " + str(suites["cipherStrength"]) + "\n"
if "ecdhBits" in suites:
suite_info += "ecdhBits: " + str(suites["ecdhBits"]) + "\n"
if "ecdhStrength" in suites:
suite_info += "ecdhStrength: " + str(suites["ecdhStrength"])
suite_info += "\n\n"
return suite_info