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fs0c131y's profile
Elliot Alderson
Elliot Alderson
Elliot Alderson
@fs0c131y

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Elliot Alderson

@fs0c131y

French security researcher. Worst nightmare of Oneplus, Wiko, UIDAI, Kimbho and others. Not completely schizophrenic. Not related to USANetwork. DMs open.

Joined June 2015

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    1. Elliot Alderson‏ @fs0c131y 13 Nov 2017

      This lib is located in /system/lib/libdoor.so or /system/lib64/libdoor.so. You can find the sample here: https://www.virustotal.com/#/file/3e6df251ad4fe115563b51b302fec2d7836e14dd28ae06e8b41c1939d4bca33d …

      1 reply 5 retweets 33 likes
      Show this thread
    2. Elliot Alderson‏ @fs0c131y 13 Nov 2017

      This is the interesting strings of the lib. After a first read we can see that libcrypto is used and the key and the password are backup in /data/backup/fpwd and /data/backup/fkeypic.twitter.com/Y0JbAk3Fp7

      1 reply 3 retweets 25 likes
      Show this thread
    3. Elliot Alderson‏ @fs0c131y 13 Nov 2017

      This is the code responsible of the password verification. 1st it check the length, calculate the hash and compare it to the correct one.pic.twitter.com/efldDJO0Qu

      2 replies 4 retweets 26 likes
      Show this thread
    4. Elliot Alderson‏ @fs0c131y 13 Nov 2017

      Unfortunately, I didn't find the password, so if some you are skilled in reversing native lib, your help is very welcome!

      2 replies 2 retweets 27 likes
      Show this thread
    5. Elliot Alderson‏ @fs0c131y 13 Nov 2017

      If the verification is passed the password hash is stored in /data/backup/fpwdpic.twitter.com/lkcWlr7Wfb

      1 reply 3 retweets 19 likes
      Show this thread
    6. Elliot Alderson‏ @fs0c131y 13 Nov 2017

      and the key is made from different build properties like http://ro.build  .type, http://ro.build  .user,... and stored in /data/backup/fkeypic.twitter.com/NMto5BY7zp

      1 reply 2 retweets 21 likes
      Show this thread
    7. Elliot Alderson‏ @fs0c131y 13 Nov 2017

      Using @fridadotre and the script attached, I managed to bypass the escalate and isEscalated methods and become rootpic.twitter.com/oXGGEIqFad

      5 replies 12 retweets 60 likes
      Show this thread
    8. Elliot Alderson‏ @fs0c131y 13 Nov 2017

      Here the source code of the EngineerMode apk: https://github.com/fs0c131y/EngineerMode …. Feel free to dig on your own and share your findings!

      3 replies 24 retweets 79 likes
      Show this thread
    9. Elliot Alderson‏ @fs0c131y 13 Nov 2017

      cc @AndroidAuth @AndroidPolice @androidandme @Androidheadline @AndroidPolice @xdadevelopers @AndroidSPIN @Gadgets360 @TheHackersNews you have a subject here to write an article. It's not normal to have this kind of backdoor in an end user product...

      4 replies 12 retweets 66 likes
      Show this thread
    10. Tim Strazzere‏Verified account @timstrazz 14 Nov 2017
      Replying to @fs0c131y @oneplus and

      "It's not normal to have this kind of backdoor in an end user product" < If only that was true... Sadly, it is quiet common

      1 reply 2 retweets 7 likes
      Elliot Alderson‏ @fs0c131y 14 Nov 2017
      Replying to @timstrazz @oneplus and

      Yes I know :/ but maybe we can change that? or at least try

      11:15 AM - 14 Nov 2017
      • 2 Likes
      • MalwareHunterTeam Auxilus
      1 reply 0 retweets 2 likes
        1. New conversation
        2. Tim Strazzere‏Verified account @timstrazz 14 Nov 2017
          Replying to @fs0c131y @oneplus and

          Potentially, however the bulk of the change needs to be from within those orgs. We (many sec folks) have been fighting this fight for a long time, OEMs tend to not care

          1 reply 1 retweet 1 like
        3. Tim Strazzere‏Verified account @timstrazz 14 Nov 2017
          Replying to @timstrazz @fs0c131y and

          Folks need to vote with their wallets if they care about security. If you want to see an OEM who screws up constantly, look at the ADUPs/BLU/Mediatek junk - very similar (if not worse)

          0 replies 0 retweets 0 likes
        4. End of conversation

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