local http = require "http" local io = require "io" local json = require "json" local stdnse = require "stdnse" local openssl = stdnse.silent_require "openssl" local tab = require "tab" local table = require "table" description = [[ Checks whether a file has been determined as malware by Virustotal. Virustotal is a service that provides the capability to scan a file or check a checksum against a number of the major antivirus vendors. The script uses the public API which requires a valid API key and has a limit on 4 queries per minute. A key can be acquired by registering as a user on the virustotal web page: * http://www.virustotal.com The scripts supports both sending a file to the server for analysis or checking whether a checksum (supplied as an argument or calculated from a local file) was previously discovered as malware. As uploaded files are queued for analysis, this mode simply returns a URL where status of the queued file may be checked. ]] --- -- @usage -- nmap --script http-virustotal --script-args='http-virustotal.apikey="",http-virustotal.checksum="275a021bbfb6489e54d471899f7db9d1663fc695ec2fe2a2c4538aabf651fd0f"' -- -- @output -- Pre-scan script results: -- | http-virustotal: -- | Permalink: https://www.virustotal.com/file/275a021bbfb6489e54d471899f7db9d1663fc695ec2fe2a2c4538aabf651fd0f/analysis/1333633817/ -- | Scan date: 2012-04-05 13:50:17 -- | Positives: 41 -- | digests -- | SHA1: 3395856ce81f2b7382dee72602f798b642f14140 -- | SHA256: 275a021bbfb6489e54d471899f7db9d1663fc695ec2fe2a2c4538aabf651fd0f -- | MD5: 44d88612fea8a8f36de82e1278abb02f -- | Results -- | name result date version -- | AhnLab-V3 EICAR_Test_File 20120404 2012.04.05.00 -- | AntiVir Eicar-Test-Signature 20120405 7.11.27.24 -- | Antiy-AVL AVTEST/EICAR.ETF 20120403 2.0.3.7 -- | Avast EICAR Test-NOT virus!!! 20120405 6.0.1289.0 -- | AVG EICAR_Test 20120405 10.0.0.1190 -- | BitDefender EICAR-Test-File (not a virus) 20120405 7.2 -- | ByteHero - 20120404 1.0.0.1 -- | CAT-QuickHeal EICAR Test File 20120405 12.00 -- | ClamAV Eicar-Test-Signature 20120405 0.97.3.0 -- | Commtouch EICAR_Test_File 20120405 5.3.2.6 -- | Comodo Exploit.EICAR-Test-File 20120405 12000 -- | DrWeb EICAR Test File (NOT a Virus!) 20120405 7.0.1.02210 -- | Emsisoft EICAR-ANTIVIRUS-TESTFILE!IK 20120405 5.1.0.11 -- | eSafe EICAR Test File 20120404 7.0.17.0 -- | eTrust-Vet the EICAR test string 20120405 37.0.9841 -- | F-Prot EICAR_Test_File 20120405 4.6.5.141 -- | F-Secure EICAR_Test_File 20120405 9.0.16440.0 -- | Fortinet EICAR_TEST_FILE 20120405 4.3.392.0 -- | GData EICAR-Test-File 20120405 22 -- | Ikarus EICAR-ANTIVIRUS-TESTFILE 20120405 T3.1.1.118.0 -- | Jiangmin EICAR-Test-File 20120331 13.0.900 -- | K7AntiVirus EICAR_Test_File 20120404 9.136.6595 -- | Kaspersky EICAR-Test-File 20120405 9.0.0.837 -- | McAfee EICAR test file 20120405 5.400.0.1158 -- | McAfee-GW-Edition EICAR test file 20120404 2012.1 -- | Microsoft Virus:DOS/EICAR_Test_File 20120405 1.8202 -- | NOD32 Eicar test file 20120405 7031 -- | Norman Eicar_Test_File 20120405 6.08.03 -- | nProtect EICAR-Test-File 20120405 2012-04-05.01 -- | Panda EICAR-AV-TEST-FILE 20120405 10.0.3.5 -- | PCTools Virus.DOS.EICAR_test_file 20120405 8.0.0.5 -- | Rising EICAR-Test-File 20120405 24.04.02.03 -- | Sophos EICAR-AV-Test 20120405 4.73.0 TP -- | SUPERAntiSpyware NotAThreat.EICAR[TestFile] 20120402 4.40.0.1006 -- | Symantec EICAR Test String 20120405 20111.2.0.82 -- | TheHacker EICAR_Test_File 20120405 6.7.0.1.440 -- | TrendMicro Eicar_test_file 20120405 9.500.0.1008 -- | TrendMicro-HouseCall Eicar_test_file 20120405 9.500.0.1008 -- | VBA32 EICAR-Test-File 20120405 3.12.16.4 -- | VIPRE EICAR (v) 20120405 11755 -- | ViRobot EICAR-test 20120405 2012.4.5.5025 -- |_ VirusBuster EICAR_test_file 20120404 14.2.11.0 -- -- @args http-virustotal.apikey an API key acquired from the virustotal web page -- @args http-virustotal.upload true if the file should be uploaded and scanned, false if a -- checksum should be calculated of the local file (default: false) -- @args http-virustotal.filename the full path of the file to checksum or upload -- @args http-virustotal.checksum a SHA1, SHA256, MD5 checksum of a file to check -- author = "Patrik Karlsson" license = "Same as Nmap--See https://nmap.org/book/man-legal.html" categories={"safe", "malware", "external"} local arg_apiKey = stdnse.get_script_args(SCRIPT_NAME .. ".apikey") local arg_upload = stdnse.get_script_args(SCRIPT_NAME .. ".upload") or false local arg_filename = stdnse.get_script_args(SCRIPT_NAME .. ".filename") local arg_checksum = stdnse.get_script_args(SCRIPT_NAME .. ".checksum") prerule = function() return true end local function readFile(filename) local f = io.open(filename, "r") if ( not(f) ) then return false, ("Failed to open file: %s"):format(filename) end local str = f:read("*all") if ( not(str) ) then f:close() return false, "Failed to read file contents" end f:close() return true, str end local function requestFileScan(filename) local status, str = readFile(filename) if ( not(status) ) then return false, str end local shortfile = filename:match("^.*[\\/](.*)$") local boundary = "----------------------------nmapboundary" local header = { ["Content-Type"] = ("multipart/form-data; boundary=%s"):format(boundary) } local postdata = ("--%s\r\n" .. 'Content-Disposition: form-data; name="apikey"\r\n\r\n' .. "%s\r\n" .. "--%s\r\n" .. 'Content-Disposition: form-data; name="file"; filename="%s"\r\n' .. "Content-Type: text/plain\r\n\r\n%s\r\n--%s--\r\n"):format(boundary, arg_apiKey, boundary, shortfile, str, boundary) local host = "www.virustotal.com" local port = { number = 80, protocol = "tcp" } local path = "/vtapi/v2/file/scan" local response = http.post( host, port, path, { header = header }, nil, postdata ) if ( not(response) or response.status ~= 200 ) then return false, "Failed to request file scan" end local status, json_data = json.parse(response.body) if ( not(status) ) then return false, "Failed to parse JSON response" end return true, json_data end local function getFileScanReport(resource) local host = "www.virustotal.com" local port = { number = 80, protocol = "tcp" } local path = "/vtapi/v2/file/report" local response = http.post(host, port, path, nil, nil, { ["apikey"] = arg_apiKey, ["resource"] = resource }) if ( not(response) or response.status ~= 200 ) then return false, "Failed to retrieve scan report" end local status, json_data = json.parse(response.body) if ( not(status) ) then return false, "Failed to parse JSON response" end return true, json_data end local function calcSHA256(filename) local status, str = readFile(filename) if ( not(status) ) then return false, str end return true, stdnse.tohex(openssl.digest("sha256", str)) end local function parseScanReport(report) local result = {} table.insert(result, ("Permalink: %s"):format(report.permalink)) table.insert(result, ("Scan date: %s"):format(report.scan_date)) table.insert(result, ("Positives: %s"):format(report.positives)) table.insert(result, { name = "digests", ("SHA1: %s"):format(report.sha1), ("SHA256: %s"):format(report.sha256), ("MD5: %s"):format(report.md5) }) local tmp = {} for name, scanres in pairs(report.scans) do local res = ( scanres.detected ) and scanres.result or "-" table.insert(tmp, { name = name, result = res, update = scanres.update, version = scanres.version }) end table.sort(tmp, function(a,b) return a.name:upper()