Resubmissions

10-04-2024 02:49

240410-da1n1sfe7v 10

10-04-2024 02:49

240410-daz3gscc34 10

10-04-2024 02:48

240410-dazfyscc32 10

10-04-2024 02:48

240410-dayvesfe7s 10

14-10-2023 03:45

231014-ea62gage69 10

Analysis

  • max time kernel
    122s
  • max time network
    297s
  • platform
    windows7_x64
  • resource
    win7-20240220-en
  • resource tags

    arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
  • submitted
    10-04-2024 02:48

General

  • Target

    B9a5797cb584014f3fede.exe

  • Size

    530KB

  • MD5

    862e7aeb18ba5892f51b5712a213a614

  • SHA1

    99d86e4247f52c3ea9b2bb476af66dfc7707fa8d

  • SHA256

    44eca198c64197c511441f644895afd6a2777c28bcb6a376d4d4623b030ced31

  • SHA512

    678fc8fb5dc887f41db90e6341229ce35c830ffac4cbb91ea669ab5e8bc849bae05c15909ae62e4dfd3a249bb2ff062eaa0e256989fe203863db0396c60ec713

  • SSDEEP

    6144:XHClm6SWPoK5Z0EwVSmRPQd/t/a2zDGVPJXvnzZjDJHb571Kjn1929XDccHd8JyO:XHCnZxb88RatpvnzZjDv7oj19yTNTY

Malware Config

Extracted

Family

gurcu

C2

https://api.telegram.org/bot6176004110:AAFKA5be4dMwA848HWxzYIzrzzOGIHMOJGc/sendMessage?chat_id=615133582

Signatures

  • Gurcu, WhiteSnake

    Gurcu is a malware stealer written in C#.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Reads WinSCP keys stored on the system 2 TTPs

    Tries to access WinSCP stored sessions.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook profiles 1 TTPs 6 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\B9a5797cb584014f3fede.exe
    "C:\Users\Admin\AppData\Local\Temp\B9a5797cb584014f3fede.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2088
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "B9a5797cb584014f3fede" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\B9a5797cb584014f3fede.exe" &&START "" "C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe"
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:2900
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:2588
        • C:\Windows\system32\PING.EXE
          ping 127.0.0.1
          3⤵
          • Runs ping.exe
          PID:2608
        • C:\Windows\system32\schtasks.exe
          schtasks /create /tn "B9a5797cb584014f3fede" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe" /rl HIGHEST /f
          3⤵
          • Creates scheduled task(s)
          PID:1268
        • C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe
          "C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe"
          3⤵
          • Executes dropped EXE
          • Accesses Microsoft Outlook profiles
          • Modifies system certificate store
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2544
          • C:\Windows\system32\WerFault.exe
            C:\Windows\system32\WerFault.exe -u -p 2544 -s 2444
            4⤵
              PID:636
      • C:\Windows\system32\taskeng.exe
        taskeng.exe {B8E9D4B3-9F7F-4659-9A7D-A4F2B3ABE244} S-1-5-21-2721934792-624042501-2768869379-1000:BISMIZHX\Admin:Interactive:[1]
        1⤵
        • Suspicious use of WriteProcessMemory
        PID:1640
        • C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe
          C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe
          2⤵
          • Executes dropped EXE
          • Accesses Microsoft Outlook profiles
          • Modifies system certificate store
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          • outlook_office_path
          • outlook_win_path
          PID:2880
          • C:\Windows\system32\WerFault.exe
            C:\Windows\system32\WerFault.exe -u -p 2880 -s 1748
            3⤵
              PID:2924

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

          Filesize

          68KB

          MD5

          29f65ba8e88c063813cc50a4ea544e93

          SHA1

          05a7040d5c127e68c25d81cc51271ffb8bef3568

          SHA256

          1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

          SHA512

          e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

          Filesize

          344B

          MD5

          29e2f1059888adc0846cfda1dc82ac98

          SHA1

          738362e5a7e24cb10c228090d5c31fa89ea028a3

          SHA256

          0a497e367ef8b9ed39a42453421cb7566d59a6ad1fde4563e95f62627567f5d1

          SHA512

          68f68513602975a1c4e0a7643a6f83a4d7c5594bbe8c0c92c3397b9b490b32b4b67427a6b524af99059d1eb36e6cae8cf011de54ddda03788d4ed30302ac6c48

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

          Filesize

          344B

          MD5

          9200b94b01b8259f68191e427194ac62

          SHA1

          65f9a03c1303127a895c9ada6e5bdd31f037c205

          SHA256

          f4366eedcef9b0deaacd401893e6e0dadbd4601c5bbd724fc5de7cfb6fc68d7d

          SHA512

          9f9575e317355cc4c07b99142c18041ca724099eaf8abdfb03e06673204a436e1c8db2af7a111ca04fc94e60ac6be549b7e579af860fbd3445a56d6eeca01d9a

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

          Filesize

          344B

          MD5

          b6f18737dabed27c359e75e7f70e9f7d

          SHA1

          78a597993e27047bbf5aa625595f2cbdd8639048

          SHA256

          0833bc2af8fde808c97943ef62f4a5e6ecf01add134d306e31e15b084f7a231c

          SHA512

          659a28fd97077f136c1a59bd75a99a59d430f4f4fd5e4e8b823501b51ce70bd09d4c283e0d62159ed8404a73737c2c1303ab14290946cb787fccc5842d99a9ab

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

          Filesize

          344B

          MD5

          e00d2872f5024851effb5d0400f03298

          SHA1

          dc250734d489f7ae7eee709483d2f51bce1ea11f

          SHA256

          de94b734a35e2738047ed7c7596a19e120ee559d3f120d5ea56ee8cf714247bf

          SHA512

          08b83c3761989f9688b686456bafea4b469f740e83a8046ae030e1977a763f3c6a9a4e1915e6518250bdf72ce8bd1f9cf15cef247ae42b11da3129080ffe92e7

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

          Filesize

          344B

          MD5

          ee3f0693bb0d20881dc3b458800bc376

          SHA1

          5a26e7319aaf5bcdb3c8fb2f661370c5490a101b

          SHA256

          d4e75c2a86187a89f21e6e6fcf5797f4b30814142fc098bd8a57f8a1ed297f16

          SHA512

          f77f5ed9b7c86641e4c9ab9512cdd00947ec3e850a80dbc7dd4e76d137ad4e91e8dad05ff6d67007322dae67ef552b31a31073dd1a413ef66862d48c9e886e1a

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

          Filesize

          344B

          MD5

          452cf1a7157591501627e15506c487c1

          SHA1

          5320f11ab05594b931e279862c7f37b772023f1d

          SHA256

          b0b09861590416560fceeb3d6471baf22d6f880fd358a4d1bae584b6027b8899

          SHA512

          20f270854474ae3ba06d565f2aa5eb9ca3f833790a96cd238f7912ead3038f71de10fccca3cdf086289687f38421d371ddeea9d833ce5206fe4ad4679cc2de5c

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

          Filesize

          344B

          MD5

          82e4348751ee93889f263aed8278a81f

          SHA1

          f6df9a5b5fc182fc18d04a2df51196ac2f26dad5

          SHA256

          10de3a6edebb7dc3efa3bfeb835641b371c1ab9ce57e50cbd9a856c483d51b7f

          SHA512

          f4022cb4e6853b46168ffcce0e47bf41675fb1fff7908210c907693ac89813adaecf1343770e6ef2b51f8f2f2a6c68ec45b463054916a12e1f43dc68cc3213cd

        • C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe

          Filesize

          530KB

          MD5

          862e7aeb18ba5892f51b5712a213a614

          SHA1

          99d86e4247f52c3ea9b2bb476af66dfc7707fa8d

          SHA256

          44eca198c64197c511441f644895afd6a2777c28bcb6a376d4d4623b030ced31

          SHA512

          678fc8fb5dc887f41db90e6341229ce35c830ffac4cbb91ea669ab5e8bc849bae05c15909ae62e4dfd3a249bb2ff062eaa0e256989fe203863db0396c60ec713

        • C:\Users\Admin\AppData\Local\Temp\Cab32D6.tmp

          Filesize

          65KB

          MD5

          ac05d27423a85adc1622c714f2cb6184

          SHA1

          b0fe2b1abddb97837ea0195be70ab2ff14d43198

          SHA256

          c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

          SHA512

          6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

        • C:\Users\Admin\AppData\Local\Temp\Tar32D9.tmp

          Filesize

          171KB

          MD5

          9c0c641c06238516f27941aa1166d427

          SHA1

          64cd549fb8cf014fcd9312aa7a5b023847b6c977

          SHA256

          4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f

          SHA512

          936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06

        • C:\Users\Admin\AppData\Local\Temp\Tar33BA.tmp

          Filesize

          177KB

          MD5

          435a9ac180383f9fa094131b173a2f7b

          SHA1

          76944ea657a9db94f9a4bef38f88c46ed4166983

          SHA256

          67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

          SHA512

          1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

        • C:\Users\Admin\AppData\Local\gzrj1xdnai\port.dat

          Filesize

          4B

          MD5

          b848edae25876384476f8970b8491160

          SHA1

          2f1dbc42f02c71cf2a7495138fd5abc55b333687

          SHA256

          cfe0815a32292cc382049153f5ad0111bc9e67b23af29a74962756ad43de4cc7

          SHA512

          17996215ae538d13651c06f4c1a89a4e4d3836702f613798994fa131e8043ecfc5e56e45d47ec81500f04c3a38dc042e4f9f0be26c5fdbef937d149ccc80f759

        • memory/2088-0-0x0000000000C40000-0x0000000000CCA000-memory.dmp

          Filesize

          552KB

        • memory/2088-5-0x000007FEF5BB0000-0x000007FEF659C000-memory.dmp

          Filesize

          9.9MB

        • memory/2088-2-0x0000000000BB0000-0x0000000000C30000-memory.dmp

          Filesize

          512KB

        • memory/2088-1-0x000007FEF5BB0000-0x000007FEF659C000-memory.dmp

          Filesize

          9.9MB

        • memory/2544-9-0x0000000000960000-0x00000000009EA000-memory.dmp

          Filesize

          552KB

        • memory/2544-147-0x000007FEF51C0000-0x000007FEF5BAC000-memory.dmp

          Filesize

          9.9MB

        • memory/2544-11-0x000000001A8F0000-0x000000001A970000-memory.dmp

          Filesize

          512KB

        • memory/2544-10-0x000007FEF51C0000-0x000007FEF5BAC000-memory.dmp

          Filesize

          9.9MB

        • memory/2880-149-0x000007FEF51C0000-0x000007FEF5BAC000-memory.dmp

          Filesize

          9.9MB

        • memory/2880-289-0x000007FEF51C0000-0x000007FEF5BAC000-memory.dmp

          Filesize

          9.9MB