Analysis

  • max time kernel
    297s
  • max time network
    298s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240412-en
  • resource tags

    arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    16-04-2024 13:41

General

  • Target

    24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861.exe

  • Size

    256KB

  • MD5

    cdba2f85dd885d8fc4877016c917b2e1

  • SHA1

    32fa75bddbc341415218283a734b6bd8e8d23d38

  • SHA256

    24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861

  • SHA512

    84dc041a5285354864c57ec808d04f6963b07ba8feb77e216e37cc5a1cfd534ea411f7098ccc77a8f71852d04f5a58c440c1e2c6bccda54e42a12a3758a56a62

  • SSDEEP

    6144:QMZzx4t3P+Oqum37ZUr6dgZTlpF1aJ9bR0zuZEi:hx8PvqR7I6dgZT40S2i

Malware Config

Signatures

  • Detect Gurcu Stealer V3 payload 2 IoCs
  • Gurcu, WhiteSnake

    Gurcu is a malware stealer written in C#.

  • Executes dropped EXE 7 IoCs
  • Loads dropped DLL 8 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 3 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Looks up external IP address via web service 1 IoCs

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

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • 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 5 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of WriteProcessMemory 13 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\24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861.exe
    "C:\Users\Admin\AppData\Local\Temp\24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3964
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\WindowsSecurity\24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861.exe" &&START "" "C:\Users\Admin\AppData\Local\WindowsSecurity\24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2892
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:3976
        • C:\Windows\system32\PING.EXE
          ping 127.0.0.1
          3⤵
          • Runs ping.exe
          PID:4284
        • C:\Windows\system32\schtasks.exe
          schtasks /create /tn "24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\WindowsSecurity\24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861.exe" /rl HIGHEST /f
          3⤵
          • Creates scheduled task(s)
          PID:4180
        • C:\Users\Admin\AppData\Local\WindowsSecurity\24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861.exe
          "C:\Users\Admin\AppData\Local\WindowsSecurity\24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861.exe"
          3⤵
          • Executes dropped EXE
          • Accesses Microsoft Outlook profiles
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          • outlook_office_path
          • outlook_win_path
          PID:2636
          • C:\Users\Admin\AppData\Local\c5b6tzqxp9\tor\tor-real.exe
            "C:\Users\Admin\AppData\Local\c5b6tzqxp9\tor\tor-real.exe" -f "C:\Users\Admin\AppData\Local\c5b6tzqxp9\tor\torrc.txt"
            4⤵
            • Executes dropped EXE
            • Loads dropped DLL
            PID:1064
    • C:\Users\Admin\AppData\Local\WindowsSecurity\24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861.exe
      C:\Users\Admin\AppData\Local\WindowsSecurity\24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861.exe
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:2092
    • C:\Users\Admin\AppData\Local\WindowsSecurity\24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861.exe
      C:\Users\Admin\AppData\Local\WindowsSecurity\24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861.exe
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:3220
    • C:\Users\Admin\AppData\Local\WindowsSecurity\24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861.exe
      C:\Users\Admin\AppData\Local\WindowsSecurity\24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861.exe
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:4484
    • C:\Users\Admin\AppData\Local\WindowsSecurity\24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861.exe
      C:\Users\Admin\AppData\Local\WindowsSecurity\24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861.exe
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:464
    • C:\Users\Admin\AppData\Local\WindowsSecurity\24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861.exe
      C:\Users\Admin\AppData\Local\WindowsSecurity\24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861.exe
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:5088

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861.exe.log

      Filesize

      847B

      MD5

      486ebddc86ea8b3e965d390d22283a23

      SHA1

      eaffc047f067084867e8575c576a9ec60e094ba8

      SHA256

      50a57273ecb794e53b0622eb841341e2643c11f53fa47356e6e754ab2268171d

      SHA512

      0a50ba02250b38355a6f4fb94e40c61258a74031d9aea7cdf675f3e068f39ec0748ecf292aaf2f94b1963b9d66516ee79aa6c552617048e248774af0ff07189d

    • C:\Users\Admin\AppData\Local\WindowsSecurity\24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861.exe

      Filesize

      256KB

      MD5

      cdba2f85dd885d8fc4877016c917b2e1

      SHA1

      32fa75bddbc341415218283a734b6bd8e8d23d38

      SHA256

      24cfa89e815eb1cff357d2aeacc874a7fc99081ed731d9d756368edfe5bec861

      SHA512

      84dc041a5285354864c57ec808d04f6963b07ba8feb77e216e37cc5a1cfd534ea411f7098ccc77a8f71852d04f5a58c440c1e2c6bccda54e42a12a3758a56a62

    • C:\Users\Admin\AppData\Local\c5b6tzqxp9\port.dat

      Filesize

      4B

      MD5

      0c1c995b77ea7312f887ddd9f9d35de5

      SHA1

      4f4b185423001397274200c83bf6189157174ba1

      SHA256

      2f99e0fa3453fe4f6604185dd5553de0b7ceff01866d6054297aba510f47c947

      SHA512

      2357f0c1af1afaea9af19925d685e0b07bbe69340ce2738a924d91e8eea03160a695181c54011a89a380aaff4e137e003a0a74a128d6fda00c7796a6c93ee07e

    • C:\Users\Admin\AppData\Local\c5b6tzqxp9\tor\data\cached-microdesc-consensus

      Filesize

      2.6MB

      MD5

      19a1ff4739901b80c88834cf7d4925eb

      SHA1

      75dec3747387d1a54035c9ae1ce7bc7488bec125

      SHA256

      1f23e720888ae52453dfe0df103aa9fd98e6e77f9ceba6c8798ba64339b26e61

      SHA512

      e3e0302c24bc98b07d640492a691a6d6d31a8345cf443a00d086eb91ae8a8bc26e90b3daf38288d6e2da0098097c60fb05e2e94971a4ba1c45654b357d060ac1

    • C:\Users\Admin\AppData\Local\c5b6tzqxp9\tor\data\cached-microdescs.new

      Filesize

      10.7MB

      MD5

      f0d75f05d63e1a8f8c923cb2c0b22e05

      SHA1

      18f9c651d91db0637c40ce1682d6063eb85612b4

      SHA256

      914b04904784508eb160e14b7ca50445b10ea3b6075a572bcfbfe689ec48dd14

      SHA512

      44f297deb5ccaf871cc1c7b1e4f5271cdfa46385dcc60feb9892b3be78c0e1a3ff004ab9fa24e5d3f18e0aa2e57405d6eeb55a971d557d08776db46bca633293

    • C:\Users\Admin\AppData\Local\c5b6tzqxp9\tor\host\hostname

      Filesize

      64B

      MD5

      b747d691377f76fee8808962ea2f7709

      SHA1

      4d4d0616204a2ed23bef3a575f959e36c5439efa

      SHA256

      7ed428bf2d4a1b0cca60e45b015478c655adf7f3d733147728066993924b0e2f

      SHA512

      f74e14368e122531b9353506c3e83c465f80f23b843bef16f4aa425b815d564f7bcde6fffb286742d33d26ae9bcee6d300235dacc870713a25a1fdc046476474

    • C:\Users\Admin\AppData\Local\c5b6tzqxp9\tor\libcrypto-1_1.dll

      Filesize

      3.5MB

      MD5

      6d48d76a4d1c9b0ff49680349c4d28ae

      SHA1

      1bb3666c16e11eff8f9c3213b20629f02d6a66cb

      SHA256

      3f08728c7a67e4998fbdc7a7cb556d8158efdcdaf0acf75b7789dccace55662d

      SHA512

      09a4fd7b37cf52f6a0c3bb0a7517e2d2439f4af8e03130aed3296d7448585ea5e3c0892e1e1202f658ef2d083ce13c436779e202c39620a70a17b026705c65c9

    • C:\Users\Admin\AppData\Local\c5b6tzqxp9\tor\libevent-2-1-7.dll

      Filesize

      1.1MB

      MD5

      a3bf8e33948d94d490d4613441685eee

      SHA1

      75ed7f6e2855a497f45b15270c3ad4aed6ad02e2

      SHA256

      91c812a33871e40b264761f1418e37ebfeb750fe61ca00cbcbe9f3769a8bf585

      SHA512

      c20ef2efcacb5f8c7e2464de7fde68bf610ab2e0608ff4daed9bf676996375db99bee7e3f26c5bd6cca63f9b2d889ed5460ec25004130887cd1a90b892be2b28

    • C:\Users\Admin\AppData\Local\c5b6tzqxp9\tor\libgcc_s_sjlj-1.dll

      Filesize

      1.0MB

      MD5

      bd40ff3d0ce8d338a1fe4501cd8e9a09

      SHA1

      3aae8c33bf0ec9adf5fbf8a361445969de409b49

      SHA256

      ebda776a2a353f8f0690b1c7706b0cdaff3d23e1618515d45e451fc19440501c

      SHA512

      404fb3c107006b832b8e900f6e27873324cd0a7946cdccf4ffeea365a725892d929e8b160379af9782bcd6cfeb4c3c805740e21280b42bb2ce8f39f26792e5a1

    • C:\Users\Admin\AppData\Local\c5b6tzqxp9\tor\libssl-1_1.dll

      Filesize

      1.1MB

      MD5

      945d225539becc01fbca32e9ff6464f0

      SHA1

      a614eb470defeab01317a73380f44db669100406

      SHA256

      c697434857a039bf27238c105be0487a0c6c611dd36cb1587c3c6b3bf582718a

      SHA512

      409f8f1e6d683a3cbe7954bce37013316dee086cdbd7ecda88acb5d94031cff6166a93b641875116327151823cce747bcf254c0185e0770e2b74b7c5e067bc4a

    • C:\Users\Admin\AppData\Local\c5b6tzqxp9\tor\libssp-0.dll

      Filesize

      246KB

      MD5

      b77328da7cead5f4623748a70727860d

      SHA1

      13b33722c55cca14025b90060e3227db57bf5327

      SHA256

      46541d9e28c18bc11267630920b97c42f104c258b55e2f62e4a02bcd5f03e0e7

      SHA512

      2f1bd13357078454203092ed5ddc23a8baa5e64202fba1e4f98eacf1c3c184616e527468a96ff36d98b9324426dddfa20b62b38cf95c6f5c0dc32513ebace9e2

    • C:\Users\Admin\AppData\Local\c5b6tzqxp9\tor\libwinpthread-1.dll

      Filesize

      512KB

      MD5

      19d7cc4377f3c09d97c6da06fbabc7dc

      SHA1

      3a3ba8f397fb95ed5df22896b2c53a326662fcc9

      SHA256

      228fcfe9ed0574b8da32dd26eaf2f5dbaef0e1bd2535cb9b1635212ccdcbf84d

      SHA512

      23711285352cdec6815b5dd6e295ec50568fab7614706bc8d5328a4a0b62991c54b16126ed9e522471d2367b6f32fa35feb41bfa77b3402680d9a69f53962a4a

    • C:\Users\Admin\AppData\Local\c5b6tzqxp9\tor\tor-real.exe

      Filesize

      4.0MB

      MD5

      07244a2c002ffdf1986b454429eace0b

      SHA1

      d7cd121caac2f5989aa68a052f638f82d4566328

      SHA256

      e9522e6912a0124c0a8c9ff9bb3712b474971376a4eb4ca614bb1664a2b4abcf

      SHA512

      4a09db85202723a73703c5926921fef60c3dddae21528a01936987306c5e7937463f94a2f4a922811de1f76621def2a8a597a8b38a719dd24e6ff3d4e07492ca

    • C:\Users\Admin\AppData\Local\c5b6tzqxp9\tor\torrc.txt

      Filesize

      226B

      MD5

      a682fcfb30e583f44b891acb70b110db

      SHA1

      0c7c33b6b354dd87f94ce0b968a398500bf4a686

      SHA256

      e55fe34aed559b0819a89886cbcb5899890e206d1e1a2789265a447748954d64

      SHA512

      43f9cac42202c40e6e5729e6e2981f8ec20b179fda935d02589b7d177d2622a9a2a0c11b974107f9c6e83fc721a972d246606cdaf9480d5d5b2a55efc04f9bcd

    • C:\Users\Admin\AppData\Local\c5b6tzqxp9\tor\zlib1.dll

      Filesize

      121KB

      MD5

      6f98da9e33cd6f3dd60950413d3638ac

      SHA1

      e630bdf8cebc165aa81464ff20c1d55272d05675

      SHA256

      219d9d5bf0de4c2251439c89dd5f2959ee582e7f9f7d5ff66a29c88753a3a773

      SHA512

      2983faaf7f47a8f79a38122aa617e65e7deddd19ba9a98b62acf17b48e5308099b852f21aaf8ca6fe11e2cc76c36eed7ffa3307877d4e67b1659fe6e4475205c

    • memory/464-325-0x00007FFD4EE30000-0x00007FFD4F8F2000-memory.dmp

      Filesize

      10.8MB

    • memory/464-326-0x00007FFD4EE30000-0x00007FFD4F8F2000-memory.dmp

      Filesize

      10.8MB

    • memory/1064-133-0x0000000000B60000-0x0000000000F74000-memory.dmp

      Filesize

      4.1MB

    • memory/1064-135-0x0000000074C50000-0x0000000074D4B000-memory.dmp

      Filesize

      1004KB

    • memory/1064-111-0x0000000000B60000-0x0000000000F74000-memory.dmp

      Filesize

      4.1MB

    • memory/1064-109-0x0000000074990000-0x0000000074A76000-memory.dmp

      Filesize

      920KB

    • memory/1064-107-0x0000000074C50000-0x0000000074D4B000-memory.dmp

      Filesize

      1004KB

    • memory/1064-110-0x0000000074A80000-0x0000000074AA6000-memory.dmp

      Filesize

      152KB

    • memory/1064-106-0x0000000000B60000-0x0000000000F74000-memory.dmp

      Filesize

      4.1MB

    • memory/1064-105-0x0000000074A80000-0x0000000074AA6000-memory.dmp

      Filesize

      152KB

    • memory/1064-104-0x0000000074C50000-0x0000000074D4B000-memory.dmp

      Filesize

      1004KB

    • memory/1064-187-0x0000000000B60000-0x0000000000F74000-memory.dmp

      Filesize

      4.1MB

    • memory/1064-227-0x0000000000B60000-0x0000000000F74000-memory.dmp

      Filesize

      4.1MB

    • memory/1064-217-0x0000000000B60000-0x0000000000F74000-memory.dmp

      Filesize

      4.1MB

    • memory/1064-201-0x0000000000B60000-0x0000000000F74000-memory.dmp

      Filesize

      4.1MB

    • memory/1064-169-0x0000000000B60000-0x0000000000F74000-memory.dmp

      Filesize

      4.1MB

    • memory/1064-134-0x0000000074D50000-0x0000000074D94000-memory.dmp

      Filesize

      272KB

    • memory/1064-136-0x0000000074BC0000-0x0000000074C41000-memory.dmp

      Filesize

      516KB

    • memory/1064-137-0x0000000074AB0000-0x0000000074BB4000-memory.dmp

      Filesize

      1.0MB

    • memory/1064-139-0x0000000074990000-0x0000000074A76000-memory.dmp

      Filesize

      920KB

    • memory/1064-140-0x0000000074690000-0x0000000074986000-memory.dmp

      Filesize

      3.0MB

    • memory/1064-108-0x0000000074690000-0x0000000074986000-memory.dmp

      Filesize

      3.0MB

    • memory/1064-142-0x0000000000B60000-0x0000000000F74000-memory.dmp

      Filesize

      4.1MB

    • memory/1064-150-0x0000000000B60000-0x0000000000F74000-memory.dmp

      Filesize

      4.1MB

    • memory/1064-152-0x0000000000B60000-0x0000000000F74000-memory.dmp

      Filesize

      4.1MB

    • memory/2092-151-0x00007FFD4EE30000-0x00007FFD4F8F2000-memory.dmp

      Filesize

      10.8MB

    • memory/2092-123-0x00007FFD4EE30000-0x00007FFD4F8F2000-memory.dmp

      Filesize

      10.8MB

    • memory/2636-141-0x000001A74A530000-0x000001A74A540000-memory.dmp

      Filesize

      64KB

    • memory/2636-11-0x00007FFD4EE30000-0x00007FFD4F8F2000-memory.dmp

      Filesize

      10.8MB

    • memory/2636-124-0x00007FFD4EE30000-0x00007FFD4F8F2000-memory.dmp

      Filesize

      10.8MB

    • memory/2636-12-0x000001A74A530000-0x000001A74A540000-memory.dmp

      Filesize

      64KB

    • memory/3220-211-0x0000024D76FE0000-0x0000024D76FF0000-memory.dmp

      Filesize

      64KB

    • memory/3220-213-0x00007FFD4EE30000-0x00007FFD4F8F2000-memory.dmp

      Filesize

      10.8MB

    • memory/3220-210-0x00007FFD4EE30000-0x00007FFD4F8F2000-memory.dmp

      Filesize

      10.8MB

    • memory/3964-6-0x00007FFD4FC50000-0x00007FFD50712000-memory.dmp

      Filesize

      10.8MB

    • memory/3964-0-0x00000275CF920000-0x00000275CF966000-memory.dmp

      Filesize

      280KB

    • memory/3964-4-0x00000275E9F90000-0x00000275E9FA0000-memory.dmp

      Filesize

      64KB

    • memory/3964-3-0x00007FFD4FC50000-0x00007FFD50712000-memory.dmp

      Filesize

      10.8MB

    • memory/4484-271-0x00007FFD4EE30000-0x00007FFD4F8F2000-memory.dmp

      Filesize

      10.8MB

    • memory/4484-272-0x00007FFD4EE30000-0x00007FFD4F8F2000-memory.dmp

      Filesize

      10.8MB

    • memory/5088-376-0x00007FFD4EE30000-0x00007FFD4F8F2000-memory.dmp

      Filesize

      10.8MB

    • memory/5088-377-0x00007FFD4EE30000-0x00007FFD4F8F2000-memory.dmp

      Filesize

      10.8MB