Resubmissions

10-04-2024 02:13

240410-cnvjgsbh46 10

10-04-2024 02:13

240410-cntxysfb9y 10

10-04-2024 02:13

240410-cntbesbh45 10

10-04-2024 02:13

240410-cns1nabh44 10

27-06-2023 15:25

230627-stryjsfe8s 10

Analysis

  • max time kernel
    597s
  • max time network
    607s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240221-en
  • resource tags

    arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    10-04-2024 02:13

General

  • Target

    446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe

  • Size

    344KB

  • MD5

    aec814bf30dd191b641feef457a718ce

  • SHA1

    96c2bea5b416d10a2dae60acd2b7f9c7cebb8115

  • SHA256

    446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89

  • SHA512

    fdd89bcb64728e88e5b9453f3c93c011fa2f22a5947a3d380ac2768184126c27b0e97556ace1d736cfe4da20281b5c710af78f55460948d5561c979021f5b6b0

  • SSDEEP

    6144:SXRrO+JguvyIs1DkhmgPZw6JXAL5+9bbYZQ4:ir/9m3cYZQ

Malware Config

Extracted

Family

gurcu

C2

https://api.telegram.org/bot6202531839:AAHT41T-v1F7LRPMrYNhW3IEdF7Ab7I7uTM/sendMessage?chat_id=-1001903439899

Signatures

  • Gurcu, WhiteSnake

    Gurcu is a malware stealer written in C#.

  • Executes dropped EXE 22 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
  • 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.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 12 IoCs
  • Suspicious use of WriteProcessMemory 34 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\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
    "C:\Users\Admin\AppData\Local\Temp\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:744
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe" &&START "" "C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:716
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:3644
        • C:\Windows\system32\PING.EXE
          ping 127.0.0.1
          3⤵
          • Runs ping.exe
          PID:1780
        • C:\Windows\system32\schtasks.exe
          schtasks /create /tn "446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe" /rl HIGHEST /f
          3⤵
          • Creates scheduled task(s)
          PID:2892
        • C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
          "C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe"
          3⤵
          • Executes dropped EXE
          • Accesses Microsoft Outlook profiles
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:3388
          • C:\Windows\System32\tar.exe
            "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp8368.tmp" -C "C:\Users\Admin\AppData\Local\8lxyt4fm8n"
            4⤵
              PID:2108
            • C:\Users\Admin\AppData\Local\8lxyt4fm8n\tor\tor.exe
              "C:\Users\Admin\AppData\Local\8lxyt4fm8n\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\8lxyt4fm8n\torrc.txt"
              4⤵
              • Executes dropped EXE
              PID:1100
      • C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
        C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3224
        • C:\Users\Admin\AppData\Local\8lxyt4fm8n\tor\tor.exe
          "C:\Users\Admin\AppData\Local\8lxyt4fm8n\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\8lxyt4fm8n\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:3636
      • C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
        C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
        1⤵
        • Executes dropped EXE
        • Accesses Microsoft Outlook profiles
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        • outlook_office_path
        • outlook_win_path
        PID:1988
        • C:\Users\Admin\AppData\Local\8lxyt4fm8n\tor\tor.exe
          "C:\Users\Admin\AppData\Local\8lxyt4fm8n\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\8lxyt4fm8n\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:1640
      • C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
        C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:580
        • C:\Users\Admin\AppData\Local\8lxyt4fm8n\tor\tor.exe
          "C:\Users\Admin\AppData\Local\8lxyt4fm8n\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\8lxyt4fm8n\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:2344
      • C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
        C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2948
        • C:\Users\Admin\AppData\Local\8lxyt4fm8n\tor\tor.exe
          "C:\Users\Admin\AppData\Local\8lxyt4fm8n\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\8lxyt4fm8n\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:3040
      • C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
        C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4592
        • C:\Users\Admin\AppData\Local\8lxyt4fm8n\tor\tor.exe
          "C:\Users\Admin\AppData\Local\8lxyt4fm8n\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\8lxyt4fm8n\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:4524
      • C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
        C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1560
        • C:\Users\Admin\AppData\Local\8lxyt4fm8n\tor\tor.exe
          "C:\Users\Admin\AppData\Local\8lxyt4fm8n\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\8lxyt4fm8n\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:4016
      • C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
        C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:492
        • C:\Users\Admin\AppData\Local\8lxyt4fm8n\tor\tor.exe
          "C:\Users\Admin\AppData\Local\8lxyt4fm8n\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\8lxyt4fm8n\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:2012
      • C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
        C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4908
        • C:\Users\Admin\AppData\Local\8lxyt4fm8n\tor\tor.exe
          "C:\Users\Admin\AppData\Local\8lxyt4fm8n\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\8lxyt4fm8n\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:1824
      • C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
        C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3856
        • C:\Users\Admin\AppData\Local\8lxyt4fm8n\tor\tor.exe
          "C:\Users\Admin\AppData\Local\8lxyt4fm8n\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\8lxyt4fm8n\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:2748
      • C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
        C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:688
        • C:\Users\Admin\AppData\Local\8lxyt4fm8n\tor\tor.exe
          "C:\Users\Admin\AppData\Local\8lxyt4fm8n\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\8lxyt4fm8n\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:2588

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\8lxyt4fm8n\data\cached-microdesc-consensus

        Filesize

        2.7MB

        MD5

        814f8cba43d923834b0d0027591e52bf

        SHA1

        2814b4faa0221b252164fbf9586051c07faa050f

        SHA256

        406d96a4788b07a0c4bda0e289d04472bc92a13f3b5b51e7478d095986735597

        SHA512

        45d866ec699d731eb7a50669bfa2fb469652b92d92b4546d373777192bff9d2201095ec9e13079ff422b4a7a15175142aa7d2abb57aaf4262b3e837340677069

      • C:\Users\Admin\AppData\Local\8lxyt4fm8n\data\cached-microdescs.new

        Filesize

        7.2MB

        MD5

        60fffa4c8e3f5e17a9aea8fb5669fed0

        SHA1

        70bdbf3597df450485e80da0444b8a4c3ccdb442

        SHA256

        227ff9f50b7f0cbe64246bcbd0aaf906e989709e124d12e046abffa473c1ce2c

        SHA512

        94d154445cc0d2436056f1ab0f2a60de3f6609446c1e0664d401a8ac400856d43b8d606b0e4376a7ae712f604c431f3d976aa457854114021372b50f2113c106

      • C:\Users\Admin\AppData\Local\8lxyt4fm8n\host\hostname

        Filesize

        64B

        MD5

        5ce4ba32b05c1d46474c2ba6b29a49c7

        SHA1

        c96af15d169ac673b97c4915686223f45052caaf

        SHA256

        6c4d5908b61f4a490730bc04bb885c3af359920bb79d1871a97a4928f6566fa4

        SHA512

        4a55dc5db0128c774ea7299469e3e8885f18820212e9d88550b8b099ebf55c950d7788bff716cfb0dee4a2f053b617e1532e807512ba2c8663be1435d6fd993c

      • C:\Users\Admin\AppData\Local\8lxyt4fm8n\port.dat

        Filesize

        4B

        MD5

        27934a1f19d678a1377c257b9a780e80

        SHA1

        63aee22fc50a16965750ea315c00c6b4c46137d4

        SHA256

        e485f271f7db87ad8888f40c7b00412cc0c97c9bbf35790e7ba85e08ff602860

        SHA512

        0456d647ef615abb3339674c3a98a1bf6bb192a08309061f174b79008ccf2d0de448927a1f4bae12350314b1ad86ce115d330cf135f6dfa48ea3f4e148c25c93

      • C:\Users\Admin\AppData\Local\8lxyt4fm8n\tor\tor.exe

        Filesize

        7.4MB

        MD5

        88590909765350c0d70c6c34b1f31dd2

        SHA1

        129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

        SHA256

        46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

        SHA512

        a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

      • C:\Users\Admin\AppData\Local\8lxyt4fm8n\torrc.txt

        Filesize

        218B

        MD5

        77a2953693a832bc821c4ddc9fbcb049

        SHA1

        e6068943526aa2330744e1371d78aa5d73ef07cd

        SHA256

        5c5ff5a5b4fb743223e66e657dc1b3d54600b54f828214d9da6c35899ec20098

        SHA512

        8b1aa18c965cd3f7154331b90965027bbec3c200bc84b987b92c8eb3e2c2fd7536a6fff8f51933a85b06d2ceee1b817d96a9e154d73dbc8feb8fe7f2305419b5

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe.log

        Filesize

        847B

        MD5

        486ebddc86ea8b3e965d390d22283a23

        SHA1

        eaffc047f067084867e8575c576a9ec60e094ba8

        SHA256

        50a57273ecb794e53b0622eb841341e2643c11f53fa47356e6e754ab2268171d

        SHA512

        0a50ba02250b38355a6f4fb94e40c61258a74031d9aea7cdf675f3e068f39ec0748ecf292aaf2f94b1963b9d66516ee79aa6c552617048e248774af0ff07189d

      • C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe

        Filesize

        344KB

        MD5

        aec814bf30dd191b641feef457a718ce

        SHA1

        96c2bea5b416d10a2dae60acd2b7f9c7cebb8115

        SHA256

        446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89

        SHA512

        fdd89bcb64728e88e5b9453f3c93c011fa2f22a5947a3d380ac2768184126c27b0e97556ace1d736cfe4da20281b5c710af78f55460948d5561c979021f5b6b0

      • C:\Users\Admin\AppData\Local\Temp\tmp8368.tmp

        Filesize

        13.3MB

        MD5

        89d2d5811c1aff539bb355f15f3ddad0

        SHA1

        5bb3577c25b6d323d927200c48cd184a3e27c873

        SHA256

        b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

        SHA512

        39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

      • memory/492-130-0x00007FFEF8B50000-0x00007FFEF9612000-memory.dmp

        Filesize

        10.8MB

      • memory/492-132-0x00007FFEF8B50000-0x00007FFEF9612000-memory.dmp

        Filesize

        10.8MB

      • memory/580-93-0x00007FFEF8B50000-0x00007FFEF9612000-memory.dmp

        Filesize

        10.8MB

      • memory/580-95-0x00007FFEF8B50000-0x00007FFEF9612000-memory.dmp

        Filesize

        10.8MB

      • memory/688-164-0x000001ECF4EC0000-0x000001ECF4ED0000-memory.dmp

        Filesize

        64KB

      • memory/688-166-0x00007FFEF8B50000-0x00007FFEF9612000-memory.dmp

        Filesize

        10.8MB

      • memory/688-163-0x00007FFEF8B50000-0x00007FFEF9612000-memory.dmp

        Filesize

        10.8MB

      • memory/744-6-0x00007FFEF8EE0000-0x00007FFEF99A2000-memory.dmp

        Filesize

        10.8MB

      • memory/744-0-0x000001C2D97A0000-0x000001C2D97FC000-memory.dmp

        Filesize

        368KB

      • memory/744-3-0x00007FFEF8EE0000-0x00007FFEF99A2000-memory.dmp

        Filesize

        10.8MB

      • memory/744-4-0x000001C2D9D00000-0x000001C2D9D10000-memory.dmp

        Filesize

        64KB

      • memory/1560-124-0x00007FFEF8B50000-0x00007FFEF9612000-memory.dmp

        Filesize

        10.8MB

      • memory/1560-122-0x00007FFEF8B50000-0x00007FFEF9612000-memory.dmp

        Filesize

        10.8MB

      • memory/1988-85-0x00000154EFE10000-0x00000154EFE20000-memory.dmp

        Filesize

        64KB

      • memory/1988-84-0x00007FFEF8B50000-0x00007FFEF9612000-memory.dmp

        Filesize

        10.8MB

      • memory/1988-87-0x00007FFEF8B50000-0x00007FFEF9612000-memory.dmp

        Filesize

        10.8MB

      • memory/2948-101-0x00007FFEF8B50000-0x00007FFEF9612000-memory.dmp

        Filesize

        10.8MB

      • memory/2948-102-0x000001FF0CA00000-0x000001FF0CA10000-memory.dmp

        Filesize

        64KB

      • memory/2948-104-0x00007FFEF8B50000-0x00007FFEF9612000-memory.dmp

        Filesize

        10.8MB

      • memory/3224-53-0x00007FFEF8B50000-0x00007FFEF9612000-memory.dmp

        Filesize

        10.8MB

      • memory/3224-50-0x000001E972000000-0x000001E972010000-memory.dmp

        Filesize

        64KB

      • memory/3224-49-0x00007FFEF8B50000-0x00007FFEF9612000-memory.dmp

        Filesize

        10.8MB

      • memory/3388-54-0x00007FFEF8B50000-0x00007FFEF9612000-memory.dmp

        Filesize

        10.8MB

      • memory/3388-12-0x00000172AB390000-0x00000172AB3A0000-memory.dmp

        Filesize

        64KB

      • memory/3388-11-0x00007FFEF8B50000-0x00007FFEF9612000-memory.dmp

        Filesize

        10.8MB

      • memory/3856-151-0x00007FFEF8B50000-0x00007FFEF9612000-memory.dmp

        Filesize

        10.8MB

      • memory/3856-153-0x00007FFEF8B50000-0x00007FFEF9612000-memory.dmp

        Filesize

        10.8MB

      • memory/4592-108-0x00007FFEF8B50000-0x00007FFEF9612000-memory.dmp

        Filesize

        10.8MB

      • memory/4592-106-0x00007FFEF8B50000-0x00007FFEF9612000-memory.dmp

        Filesize

        10.8MB

      • memory/4908-138-0x00007FFEF8B50000-0x00007FFEF9612000-memory.dmp

        Filesize

        10.8MB

      • memory/4908-139-0x00000217C26F0000-0x00000217C2700000-memory.dmp

        Filesize

        64KB

      • memory/4908-141-0x00007FFEF8B50000-0x00007FFEF9612000-memory.dmp

        Filesize

        10.8MB