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
    298s
  • max time network
    304s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240319-en
  • resource tags

    arch:x64arch:x86image:win11-20240319-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 12 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.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 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\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
    "C:\Users\Admin\AppData\Local\Temp\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3512
    • 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:3768
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:2036
        • C:\Windows\system32\PING.EXE
          ping 127.0.0.1
          3⤵
          • Runs ping.exe
          PID:3612
        • 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:2252
        • 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
          • outlook_office_path
          • outlook_win_path
          PID:1076
          • C:\Windows\System32\tar.exe
            "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp7E19.tmp" -C "C:\Users\Admin\AppData\Local\8lxyt4fm8n"
            4⤵
              PID:2240
            • 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:1788
      • 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:1484
        • 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:4320
      • 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:4328
        • 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:3376
      • 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:460
        • 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:420
      • 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:1116
        • 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:4420
      • 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:5104
        • 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:424

      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

        8.1MB

        MD5

        e018f5bbd1de4710a59d55429429335a

        SHA1

        6efb2ecf239a8bccb7dd54c37ded93745653dff5

        SHA256

        6349e26da63b304897829843404388ef38ba7af33090415c3b1d8ab670cdd145

        SHA512

        f5e661ebc5ffd1eadf6b6973288bb399a9af7f6572ee362a2206e2231809ee8ddc9e497497302ac10d17d09ad1cf29c1504282732b53b8f7270f244dd9cd6f89

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

        Filesize

        64B

        MD5

        e25b9dac02df01bbd2cee00b189509c5

        SHA1

        de01c03ef539d98bdc2a5dab64eaf5bd958909f8

        SHA256

        a6d0719535d10437659d38a7a6304b3640fc7e2b07d8417cc478d6ff0e8bc6b8

        SHA512

        f940988a05cabb158fe321bd0e7947a30a4e3325b6d440af7a0ae069d67af610f194bfd1ecd8c37993cddcee6f14965e60c719080a05b83b66976effc8604239

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

        Filesize

        4B

        MD5

        234dd9e577ac5892481bc60663ffa405

        SHA1

        6aa6ee275f12a54f668410795f0154b1b7903e60

        SHA256

        64200427fa85338cb264397402c8c84765dc8a5d721dd322abd7fa13f218c69a

        SHA512

        6a6a6ab600cecff0498f6dadaa8e1b81477d878920ee49bd017179b407c09c8b5251c70352d46fe6d700b02a8d120a254045ad3bd376aca4cfeab9952aa5a2b9

      • 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

        a60bb91974febc0b2fc3752db256b20a

        SHA1

        fe579ff1d5dc0185ac63f337538638b83ec4fb04

        SHA256

        12a9e1201ebab95161b51d43dbc7729f62d8aaddab4f63f9252f5fdfa342964c

        SHA512

        ae07ba74112a7f7337db94a403fe5f037fb6f16645803fcd3802f4a90da15377aee871fde25c60ac5869600dd0793204267feab56f1b5d5b1058f899989a0768

      • 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\tmp7E19.tmp

        Filesize

        13.3MB

        MD5

        89d2d5811c1aff539bb355f15f3ddad0

        SHA1

        5bb3577c25b6d323d927200c48cd184a3e27c873

        SHA256

        b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

        SHA512

        39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

      • memory/460-83-0x00007FFDF75C0000-0x00007FFDF8082000-memory.dmp

        Filesize

        10.8MB

      • memory/460-81-0x00007FFDF75C0000-0x00007FFDF8082000-memory.dmp

        Filesize

        10.8MB

      • memory/1076-12-0x000002576FCE0000-0x000002576FCF0000-memory.dmp

        Filesize

        64KB

      • memory/1076-11-0x00007FFDF75C0000-0x00007FFDF8082000-memory.dmp

        Filesize

        10.8MB

      • memory/1076-48-0x00007FFDF75C0000-0x00007FFDF8082000-memory.dmp

        Filesize

        10.8MB

      • memory/1076-51-0x000002576FCE0000-0x000002576FCF0000-memory.dmp

        Filesize

        64KB

      • memory/1116-85-0x00007FFDF75C0000-0x00007FFDF8082000-memory.dmp

        Filesize

        10.8MB

      • memory/1116-86-0x000001FBD82B0000-0x000001FBD82C0000-memory.dmp

        Filesize

        64KB

      • memory/1116-88-0x00007FFDF75C0000-0x00007FFDF8082000-memory.dmp

        Filesize

        10.8MB

      • memory/1484-50-0x00007FFDF75C0000-0x00007FFDF8082000-memory.dmp

        Filesize

        10.8MB

      • memory/1484-55-0x00007FFDF75C0000-0x00007FFDF8082000-memory.dmp

        Filesize

        10.8MB

      • memory/1484-52-0x00000203D5360000-0x00000203D5370000-memory.dmp

        Filesize

        64KB

      • memory/3512-0-0x000001F603B80000-0x000001F603BDC000-memory.dmp

        Filesize

        368KB

      • memory/3512-6-0x00007FFDF75C0000-0x00007FFDF8082000-memory.dmp

        Filesize

        10.8MB

      • memory/3512-2-0x000001F605850000-0x000001F605860000-memory.dmp

        Filesize

        64KB

      • memory/3512-1-0x00007FFDF75C0000-0x00007FFDF8082000-memory.dmp

        Filesize

        10.8MB

      • memory/4328-72-0x00007FFDF75C0000-0x00007FFDF8082000-memory.dmp

        Filesize

        10.8MB

      • memory/4328-73-0x0000012DEFCF0000-0x0000012DEFD00000-memory.dmp

        Filesize

        64KB

      • memory/4328-75-0x00007FFDF75C0000-0x00007FFDF8082000-memory.dmp

        Filesize

        10.8MB

      • memory/5104-90-0x00007FFDF75C0000-0x00007FFDF8082000-memory.dmp

        Filesize

        10.8MB

      • memory/5104-92-0x00007FFDF75C0000-0x00007FFDF8082000-memory.dmp

        Filesize

        10.8MB