{"id":334,"date":"2015-10-24T18:51:00","date_gmt":"2015-10-24T10:51:00","guid":{"rendered":"http:\/\/note.systw.net\/note\/?p=334"},"modified":"2023-10-30T19:00:28","modified_gmt":"2023-10-30T11:00:28","slug":"mobile-phone-forensics","status":"publish","type":"post","link":"https:\/\/systw.net\/note\/archives\/334","title":{"rendered":"Mobile phone forensics"},"content":{"rendered":"\n

Mobile phone forensics<\/strong>
A science of recovering digital evidence from a mobile phone under forensically sound conditions.<\/p>\n\n\n\n

———————————————————-<\/p>\n\n\n\n

Mobile Concept<\/strong><\/h3>\n\n\n\n

Common type of mobile OS<\/strong>
webos
symbian os
android os: open source
apple ios
windows phone7
rim blackberry os<\/p>\n\n\n\n

ps:
Blackberry devices:
encryption technology of Password Keeper is AES
hashing method of password protection is SHA-1<\/p>\n\n\n\n

…<\/p>\n\n\n\n

Architecture of cellular network<\/strong>
Mobile station<\/strong>:\u624b\u6a5f
SIM(subscriber identity module)
Base station subsystem<\/strong>:\u6a5f\u5730\u53f0
BST(base transceiver station)
BSC(base station controller)
Network subsystem<\/strong>:\u96fb\u4fe1\u6a5f\u623f
MSC(mobile services switching center)
other as below
\u3000HLR(home location register)
\u3000VLR(visitor location register)
\u3000EIR(equipment identity register)
\u3000AUC(authentication center)<\/p>\n\n\n\n

…<\/p>\n\n\n\n

\u9451\u8b58\u76ee\u6a19\u4e3b\u8981\u6709<\/strong>
SIM\u5361
mobile device<\/p>\n\n\n\n

SIM(subscriber identity module)<\/strong>
a removable component that contains essential information about the subscriber
main funcation entails authenticating the suer of the cell phone
it has both volatile and nonvolatile memory
the file system of a SIM resides in nonvolatile memory<\/p>\n\n\n\n

SIM password<\/strong>
a PIN(Personal identification Number) code
PUK(Personal Unlock Number) can unlock protection of 3 times password failed<\/p>\n\n\n\n

SIM file system<\/strong>
MF(master file):1\u500bMF\u5305\u542b\u591a\u500bDF
DF(dedicated file):1\u500bDF\u5305\u542b\u591a\u500bEF
EF(elementary files)<\/p>\n\n\n\n

ICCID(integrated circuit card identification)<\/strong>
SIM id
20 digit number as below
1-2 = industry identifier prefix, 89 for telcommunication
3-4 = country code
5-10 = issuer identifier number
11-20 = individual account identification number

IMEI(international mobile equipment identifier)<\/strong>
15 digit number
first 8 digit = TAC(type allocation code)
it can be obtained by keying in *#06#<\/p>\n\n\n\n

ESN(electronic serial number)<\/strong>
unique 32 bit identifier recorded on a secure chip<\/p>\n\n\n\n

———————————————————-<\/p>\n\n\n\n

Mobile Forensics Process<\/strong><\/h3>\n\n\n\n

Acquire the information<\/strong>
acquire data from SIM card
acquire data from synched devices,memory cards
acquire data from obsructed and unobstructed mobile devices,
gather data from network operator
gather data from sqlite record<\/p>\n\n\n\n

Sqlite database<\/strong>
store vital information by iOS and android
information include contacts,SMS,call records<\/p>\n\n\n\n

Hex viewer from sqlite record<\/strong>
1th,record length: 1 byte
2th,key: 1byte
3th,record header length: 1byte
5th,address length:1byte
6th,date and time stamp,1byte
7~8th,message length: 2byte
9th,flag

…<\/p>\n\n\n\n

Mobile evidence<\/strong>
SIM in GSM\/UMTS: \u6709\u4f7f\u7528\u8005\u76f8\u95dc\u8cc7\u8a0a
Phone Internal Memory(\u624b\u6a5f\u8a18\u61b6\u9ad4): \u6709\u5927\u90e8\u5206\u7684\u901a\u8a71\u7d00\u9304
Flash Memory Card(\u8a18\u61b6\u5361): \u5f88\u591a\u624b\u6a5f\u8a18\u61b6\u9ad4\u6216Sim\u5361\u4e2d\u7684\u8cc7\u6599
\u627e\u7cfb\u7d71\u5546Call data:\u5305\u62ec\u4f86\u6e90\u865f\u78bc,\u639b\u65b7\u865f\u78bc,\u4f86\u8a71\u8a2d\u5099\u865f\u78bc,\u901a\u8a71\u6642\u9593,\u4f7f\u7528\u670d\u52d9,\u7576\u6642\u57fa\u5730\u53f0…etc

\u627e\u624b\u6a5f\u8b49\u64da\u7684\u65b9\u6cd5<\/strong>
1.\u95dc\u6389\u624b\u6a5f\u907f\u514d\u7834\u58de
2.\u5206\u5225\u6aa2\u8996\u624b\u6a5f\u5167\u7684\u8b49\u64da
3.\u5f9e\u4f7f\u7528\u8005\u6216\u7cfb\u7d71\u5546\u53d6\u5f97SIM\u5361\u7684\u5b58\u53d6\u78bc\u4e26\u6aa2\u9a57SIM\u5361
ex: \u4f7f\u7528\u666e\u901a\u7684Smart Card Reader\u53ef\u4ee5\u627e\u56de\u522a\u6389\u7684\u8cc7\u6599
4.\u6aa2\u9a57Flash Memory
ex: \u5c07mobile\u63a5\u5230\u96fb\u8166\u4e0a\u7528forensic tool\u5206\u6790, tool\u50cf\u662f EnCase,FTK,SMART,WinHEX
5.\u628amobile\u7684\u8a18\u61b6\u9ad4\u4f5cbit stream copy
ex: \u53d6\u4e0bMemory Chip\u4e26\u8b80\u5167\u5bb9
ex: \u5f9e\u4e3b\u6a5f\u677f\u8b80\u53d6\u5167\u5bb9<\/p>\n\n\n\n

refer
http:\/\/wenku.baidu.com\/view\/da7fbcd0360cba1aa811da11.html?re=view<\/p>\n\n\n\n

…<\/p>\n\n\n\n

Mobile forensics software tools<\/p>\n\n\n\n

Popular tool as below<\/strong>
oxygen forensic suite
paraben tool<\/p>\n","protected":false},"excerpt":{"rendered":"

Mobile phone forensicsA scienc …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[11],"tags":[],"class_list":["post-334","post","type-post","status-publish","format-standard","hentry","category-forensics"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts\/334","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/comments?post=334"}],"version-history":[{"count":0,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts\/334\/revisions"}],"wp:attachment":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/media?parent=334"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/categories?post=334"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/tags?post=334"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}