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
    121s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230621-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230621-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-06-2023 15:25

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#.

  • Checks computer location settings 2 TTPs 4 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 6 IoCs
  • 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).

  • Program crash 2 IoCs
  • 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 4 IoCs
  • Suspicious use of WriteProcessMemory 18 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⤵
    • Checks computer location settings
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2664
    • 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:3628
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:1060
        • C:\Windows\system32\PING.EXE
          ping 127.0.0.1
          3⤵
          • Runs ping.exe
          PID:2780
        • 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:1928
        • C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
          "C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe"
          3⤵
          • Checks computer location settings
          • 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:1856
          • C:\Windows\System32\tar.exe
            "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp7D14.tmp" -C "C:\Users\Admin\AppData\Local\8lxyt4fm8n"
            4⤵
              PID:1564
            • 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:3672
      • C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
        C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1356
        • 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:4704
        • C:\Windows\system32\WerFault.exe
          C:\Windows\system32\WerFault.exe -u -p 1356 -s 2112
          2⤵
          • Program crash
          PID:1400
      • C:\Windows\system32\WerFault.exe
        C:\Windows\system32\WerFault.exe -pss -s 404 -p 1356 -ip 1356
        1⤵
          PID:1368
        • C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
          C:\Users\Admin\AppData\Local\Nvidia\446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89.exe
          1⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1220
          • 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:5096
          • C:\Windows\system32\WerFault.exe
            C:\Windows\system32\WerFault.exe -u -p 1220 -s 1920
            2⤵
            • Program crash
            PID:352
        • C:\Windows\system32\WerFault.exe
          C:\Windows\system32\WerFault.exe -pss -s 520 -p 1220 -ip 1220
          1⤵
            PID:1520

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            2.2MB

            MD5

            f33397954bc63dfc9696ef000989eb06

            SHA1

            de80f2b0574d6725b6a1067859bec4b3bb6c1aa7

            SHA256

            7a96d6b7ffbbe21b8c6f961809b226c47e82a95d345d81a33b857889c6a344fa

            SHA512

            00535ba274c9f652e6cfd2a0b2cedc197af37e5311c8d3a4c2eb08aafaaaab6106e5f8943b43f1280a2a22004d4fd800aa32d35cacdfb44b0b480056317f4e99

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

            Filesize

            5.7MB

            MD5

            c4daf0c4f5792ec2df1773e4fc195d68

            SHA1

            1cca09db4747bdc022b077b5e8d7f07b98fae9ae

            SHA256

            74b866f0b977f7e6cff1139e632806a3c23ecad140fdb66ac39abbd6cfae65e8

            SHA512

            78a304f695ea4975ce75a843e3318ad981118da58be5ff564e2803779833cf6c7a825d3d2ff83c5c371fb804519ada1683da659cda756dc7cb17b9dda543f689

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

            Filesize

            64B

            MD5

            7a17e2cfb38d5b48f625c42088f2b72a

            SHA1

            df787f094432834f25d35674b4148fb1faa80ebc

            SHA256

            07ef860a80bf39f8c62208661610f936753011d13970dd6931a4c2259a4e01ff

            SHA512

            67241a87de593fb9c0208c9f703443b86313f5a7cabe71a320276ca6d50fc806b052ca4dc898f5e630288a3cd90b8cec1dd26e038b65eaf60e0e2937c09ca698

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

            Filesize

            4B

            MD5

            d1ac549dbfdec4a0d49baec903648bb4

            SHA1

            6c6a79802d687823a42d3d90c860f96310c761bf

            SHA256

            0978243e4aa32d1fd946ee304694ecffeda1c0d66a41502687eb6f57c503aa31

            SHA512

            399cbb25561e4a16002aab960b5f5bb6840a2ae4fd22f75a191d0ab1f6aa3af2ec58138fd3730edc9cc87130d10ca1603dcf64a017f73365418d1946adabbfcf

          • 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\tor\tor.exe

            Filesize

            7.4MB

            MD5

            88590909765350c0d70c6c34b1f31dd2

            SHA1

            129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

            SHA256

            46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

            SHA512

            a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

          • 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\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

            c1c8373d4424e8198fa97389549f15be

            SHA1

            eb2755bca4ff56463defd2ad57c7e972ed42eea3

            SHA256

            b5bec1921b0130bda703ab7c38639ce2179e46eae61341db773b257154567839

            SHA512

            96b1e8bd12c101a44d8ce6c67cbfc8d0bfde06b9664548ede46a80ac2b17e56efd3bb3f506a5c7ac6097d208a3ddacbbc4b9adba7a6267c86f408c6e2baf6ab4

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

            Filesize

            847B

            MD5

            3308a84a40841fab7dfec198b3c31af7

            SHA1

            4e7ab6336c0538be5dd7da529c0265b3b6523083

            SHA256

            169bc31a8d1666535977ca170d246a463e6531bb21faab6c48cb4269d9d60b2e

            SHA512

            97521d5fb94efdc836ea2723098a1f26a7589a76af51358eee17292d29c9325baf53ad6b4496c5ca3e208d1c9b9ad6797a370e2ae378072fc68f5d6e8b73b198

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

            Filesize

            344KB

            MD5

            aec814bf30dd191b641feef457a718ce

            SHA1

            96c2bea5b416d10a2dae60acd2b7f9c7cebb8115

            SHA256

            446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89

            SHA512

            fdd89bcb64728e88e5b9453f3c93c011fa2f22a5947a3d380ac2768184126c27b0e97556ace1d736cfe4da20281b5c710af78f55460948d5561c979021f5b6b0

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

            Filesize

            344KB

            MD5

            aec814bf30dd191b641feef457a718ce

            SHA1

            96c2bea5b416d10a2dae60acd2b7f9c7cebb8115

            SHA256

            446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89

            SHA512

            fdd89bcb64728e88e5b9453f3c93c011fa2f22a5947a3d380ac2768184126c27b0e97556ace1d736cfe4da20281b5c710af78f55460948d5561c979021f5b6b0

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

            Filesize

            344KB

            MD5

            aec814bf30dd191b641feef457a718ce

            SHA1

            96c2bea5b416d10a2dae60acd2b7f9c7cebb8115

            SHA256

            446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89

            SHA512

            fdd89bcb64728e88e5b9453f3c93c011fa2f22a5947a3d380ac2768184126c27b0e97556ace1d736cfe4da20281b5c710af78f55460948d5561c979021f5b6b0

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

            Filesize

            344KB

            MD5

            aec814bf30dd191b641feef457a718ce

            SHA1

            96c2bea5b416d10a2dae60acd2b7f9c7cebb8115

            SHA256

            446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89

            SHA512

            fdd89bcb64728e88e5b9453f3c93c011fa2f22a5947a3d380ac2768184126c27b0e97556ace1d736cfe4da20281b5c710af78f55460948d5561c979021f5b6b0

          • C:\Users\Admin\AppData\Local\Temp\tmp7D14.tmp

            Filesize

            13.3MB

            MD5

            89d2d5811c1aff539bb355f15f3ddad0

            SHA1

            5bb3577c25b6d323d927200c48cd184a3e27c873

            SHA256

            b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

            SHA512

            39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

          • memory/1220-210-0x000002571A290000-0x000002571A2A0000-memory.dmp

            Filesize

            64KB

          • memory/1356-189-0x00000197C4480000-0x00000197C4490000-memory.dmp

            Filesize

            64KB

          • memory/1856-171-0x000002810BDA0000-0x000002810BDB0000-memory.dmp

            Filesize

            64KB

          • memory/1856-142-0x000002810BDA0000-0x000002810BDB0000-memory.dmp

            Filesize

            64KB

          • memory/2664-133-0x000001A467680000-0x000001A4676DC000-memory.dmp

            Filesize

            368KB