Resubmissions

10-04-2024 02:25

240410-cwlljsbh99 10

10-04-2024 02:25

240410-cwlasafc5v 10

10-04-2024 02:25

240410-cwkn9afc5t 10

10-04-2024 02:25

240410-cwkdgsfc5s 10

14-10-2023 04:25

231014-e12vfagc2y 10

Analysis

  • max time kernel
    598s
  • max time network
    603s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10-04-2024 02:25

General

  • Target

    Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe

  • Size

    289KB

  • MD5

    88cfc2ccc0575567122d1d233f9eb1c3

  • SHA1

    4be67d0d801197f88c14d62f4495f17e89fc471f

  • SHA256

    41505242cdbf259aada52b773daeec33d239e4aefd685ba9e406d2cf2f9871a4

  • SHA512

    a2dd9ab7a2fe2a6d596c78394f65956f3e8973940229b305e2d763be69ff9f27b1450b5e08ca57cd0886a873fb663daad20ca94d9262a6c80a582dfc5f2e42b7

  • SSDEEP

    6144:uHClm6SWPoK5Z0EwVSmRPQp+L5v9bbSUpi:uHCnZxb8hLLSUpi

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#.

  • Checks computer location settings 2 TTPs 11 IoCs

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

  • Executes dropped EXE 20 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 2 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 11 IoCs
  • Suspicious use of WriteProcessMemory 32 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\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe
    "C:\Users\Admin\AppData\Local\Temp\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2824
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "Xd2c386a3a6edfe99de10f6ce6b3659c4809a" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe" &&START "" "C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3892
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:4468
        • C:\Windows\system32\PING.EXE
          ping 127.0.0.1
          3⤵
          • Runs ping.exe
          PID:2068
        • C:\Windows\system32\schtasks.exe
          schtasks /create /tn "Xd2c386a3a6edfe99de10f6ce6b3659c4809a" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe" /rl HIGHEST /f
          3⤵
          • Creates scheduled task(s)
          PID:3000
        • C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe
          "C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe"
          3⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Accesses Microsoft Outlook profiles
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:436
          • C:\Windows\System32\tar.exe
            "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp1037.tmp" -C "C:\Users\Admin\AppData\Local\xdh16uwiax"
            4⤵
              PID:832
            • C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe
              "C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xdh16uwiax\torrc.txt"
              4⤵
              • Executes dropped EXE
              PID:216
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3652 --field-trial-handle=3192,i,2785050981002401924,4037047756083432660,262144 --variations-seed-version /prefetch:8
        1⤵
          PID:3476
        • C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe
          C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe
          1⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Accesses Microsoft Outlook profiles
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          • outlook_office_path
          • outlook_win_path
          PID:4708
          • C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe
            "C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xdh16uwiax\torrc.txt"
            2⤵
            • Executes dropped EXE
            PID:1784
        • C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe
          C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe
          1⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:468
          • C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe
            "C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xdh16uwiax\torrc.txt"
            2⤵
            • Executes dropped EXE
            PID:1624
        • C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe
          C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe
          1⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:4604
          • C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe
            "C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xdh16uwiax\torrc.txt"
            2⤵
            • Executes dropped EXE
            PID:3616
        • C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe
          C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe
          1⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:4848
          • C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe
            "C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xdh16uwiax\torrc.txt"
            2⤵
            • Executes dropped EXE
            PID:1592
        • C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe
          C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe
          1⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:228
          • C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe
            "C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xdh16uwiax\torrc.txt"
            2⤵
            • Executes dropped EXE
            PID:4432
        • C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe
          C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe
          1⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1548
          • C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe
            "C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xdh16uwiax\torrc.txt"
            2⤵
            • Executes dropped EXE
            PID:2484
        • C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe
          C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe
          1⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:3076
          • C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe
            "C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xdh16uwiax\torrc.txt"
            2⤵
            • Executes dropped EXE
            PID:732
        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=2628 --field-trial-handle=3192,i,2785050981002401924,4037047756083432660,262144 --variations-seed-version /prefetch:8
          1⤵
            PID:4360
          • C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe
            C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe
            1⤵
            • Checks computer location settings
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:4028
            • C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe
              "C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xdh16uwiax\torrc.txt"
              2⤵
              • Executes dropped EXE
              PID:2472
          • C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe
            C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe
            1⤵
            • Checks computer location settings
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:3568
            • C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe
              "C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xdh16uwiax\torrc.txt"
              2⤵
              • Executes dropped EXE
              PID:3604

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe.log

            Filesize

            847B

            MD5

            3308a84a40841fab7dfec198b3c31af7

            SHA1

            4e7ab6336c0538be5dd7da529c0265b3b6523083

            SHA256

            169bc31a8d1666535977ca170d246a463e6531bb21faab6c48cb4269d9d60b2e

            SHA512

            97521d5fb94efdc836ea2723098a1f26a7589a76af51358eee17292d29c9325baf53ad6b4496c5ca3e208d1c9b9ad6797a370e2ae378072fc68f5d6e8b73b198

          • C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe

            Filesize

            289KB

            MD5

            88cfc2ccc0575567122d1d233f9eb1c3

            SHA1

            4be67d0d801197f88c14d62f4495f17e89fc471f

            SHA256

            41505242cdbf259aada52b773daeec33d239e4aefd685ba9e406d2cf2f9871a4

            SHA512

            a2dd9ab7a2fe2a6d596c78394f65956f3e8973940229b305e2d763be69ff9f27b1450b5e08ca57cd0886a873fb663daad20ca94d9262a6c80a582dfc5f2e42b7

          • C:\Users\Admin\AppData\Local\Temp\tmp1037.tmp

            Filesize

            13.3MB

            MD5

            89d2d5811c1aff539bb355f15f3ddad0

            SHA1

            5bb3577c25b6d323d927200c48cd184a3e27c873

            SHA256

            b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

            SHA512

            39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

          • C:\Users\Admin\AppData\Local\xdh16uwiax\data\cached-microdesc-consensus.tmp

            Filesize

            2.7MB

            MD5

            a0db8a87f7b723266c8b04255da46b06

            SHA1

            4df00ea56d22d88f3d2e005ef66bad5b3ef92ebf

            SHA256

            60b43cdce0f807f7891521f396f53def34a7d98986dbde0faa2a197189c587f3

            SHA512

            41b8fc467d11af7ca6a42c7e94d1b8295ab3ae5d6d186b4f378e6e079440520e8324b695da1134beb2bc1697d2491edcc70c1b75ab6fc66b9c1cb2ecbcdb4a7d

          • C:\Users\Admin\AppData\Local\xdh16uwiax\data\cached-microdescs.new

            Filesize

            9.4MB

            MD5

            03328a8389009d4cb95ed3f22f5e93bd

            SHA1

            84eb003fe2daf28dabd7ee2dac37f2cb5d498cbf

            SHA256

            a9236c146400bf59997eac99148bb82ff5d8c3ae1092428846bff3c3cd915f64

            SHA512

            51ea34dcfa930fc5a693c62820f7cff326c637a48f9bb56b213c61b1ceafef0c8fdb8cab00ba9b2e609aade9604fe4a441eef7d89ba0e94746ae845df3e2c3b4

          • C:\Users\Admin\AppData\Local\xdh16uwiax\host\hostname

            Filesize

            64B

            MD5

            ebd60551eec158e0b460b9dd66f78b56

            SHA1

            1cb06b2eadd7013fe1686f5c01ed6298c3ea75f3

            SHA256

            e88ea34da14f63009950e2d68ce9efbed0ef18ff5a5a7a6af2ee7258733a6e17

            SHA512

            d9318599307ad783dc7754e747ee28e09babed9238606ffd5c0d16009e84e080a5076257d80bfc54c685ac72e6cb9ff958022c6c59f6527e899d29bd3710e410

          • C:\Users\Admin\AppData\Local\xdh16uwiax\port.dat

            Filesize

            4B

            MD5

            010e406df2463597c58286a93f8b3160

            SHA1

            789de634fdc64489cf9ed0cbb4fa5ee200db6f29

            SHA256

            8ae6830f615b04192db054fedd2c3dc466988c210ecc4e6332d4d98913f6305a

            SHA512

            1b6d8a2271dd57ff456f4d1f97cd4817b79f28c9731e7f0c529710d5dc507f679a2cfc77c058941ca5a2aac11079c0edd152c7922639e79184037f0368482410

          • C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe

            Filesize

            7.4MB

            MD5

            88590909765350c0d70c6c34b1f31dd2

            SHA1

            129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

            SHA256

            46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

            SHA512

            a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

          • C:\Users\Admin\AppData\Local\xdh16uwiax\torrc.txt

            Filesize

            218B

            MD5

            16fc4231ddd58030fb9b74020cab512c

            SHA1

            2b7be9aace0bd8dfe6b5456d4ce26cffed49dc43

            SHA256

            e094aaad3104dc1420d935ace2b74ef5ab6dd5123eb08e70bd30ec063318a0c2

            SHA512

            546187324ce27f94b3b4b70edaf84ea2b28a14c693dd58441397386a4c4eac78f41aaf19207592cdaafdb90c110c657e697ece9b7f466e2dda9b70bdc7bd9b07

          • memory/228-123-0x00007FFED6CF0000-0x00007FFED77B1000-memory.dmp

            Filesize

            10.8MB

          • memory/228-117-0x00007FFED6CF0000-0x00007FFED77B1000-memory.dmp

            Filesize

            10.8MB

          • memory/436-12-0x000001ED4A570000-0x000001ED4A580000-memory.dmp

            Filesize

            64KB

          • memory/436-11-0x00007FFED6CF0000-0x00007FFED77B1000-memory.dmp

            Filesize

            10.8MB

          • memory/436-64-0x00007FFED6CF0000-0x00007FFED77B1000-memory.dmp

            Filesize

            10.8MB

          • memory/436-65-0x000001ED4A570000-0x000001ED4A580000-memory.dmp

            Filesize

            64KB

          • memory/468-89-0x00007FFED6CF0000-0x00007FFED77B1000-memory.dmp

            Filesize

            10.8MB

          • memory/468-91-0x00007FFED6CF0000-0x00007FFED77B1000-memory.dmp

            Filesize

            10.8MB

          • memory/1548-131-0x00007FFED6CF0000-0x00007FFED77B1000-memory.dmp

            Filesize

            10.8MB

          • memory/1548-129-0x00007FFED6CF0000-0x00007FFED77B1000-memory.dmp

            Filesize

            10.8MB

          • memory/2824-2-0x0000021FA3940000-0x0000021FA3950000-memory.dmp

            Filesize

            64KB

          • memory/2824-1-0x00007FFED7820000-0x00007FFED82E1000-memory.dmp

            Filesize

            10.8MB

          • memory/2824-0-0x0000021F894C0000-0x0000021F8950E000-memory.dmp

            Filesize

            312KB

          • memory/2824-6-0x00007FFED7820000-0x00007FFED82E1000-memory.dmp

            Filesize

            10.8MB

          • memory/3076-137-0x00007FFED6CF0000-0x00007FFED77B1000-memory.dmp

            Filesize

            10.8MB

          • memory/3076-139-0x00007FFED6CF0000-0x00007FFED77B1000-memory.dmp

            Filesize

            10.8MB

          • memory/3568-161-0x00007FFED6CF0000-0x00007FFED77B1000-memory.dmp

            Filesize

            10.8MB

          • memory/3568-163-0x00007FFED6CF0000-0x00007FFED77B1000-memory.dmp

            Filesize

            10.8MB

          • memory/4028-149-0x00007FFED6CF0000-0x00007FFED77B1000-memory.dmp

            Filesize

            10.8MB

          • memory/4028-151-0x00007FFED6CF0000-0x00007FFED77B1000-memory.dmp

            Filesize

            10.8MB

          • memory/4604-99-0x00007FFED6CF0000-0x00007FFED77B1000-memory.dmp

            Filesize

            10.8MB

          • memory/4604-97-0x00007FFED6CF0000-0x00007FFED77B1000-memory.dmp

            Filesize

            10.8MB

          • memory/4708-79-0x00007FFED6CF0000-0x00007FFED77B1000-memory.dmp

            Filesize

            10.8MB

          • memory/4708-80-0x0000024AB9630000-0x0000024AB9640000-memory.dmp

            Filesize

            64KB

          • memory/4708-83-0x00007FFED6CF0000-0x00007FFED77B1000-memory.dmp

            Filesize

            10.8MB

          • memory/4848-109-0x00007FFED6CF0000-0x00007FFED77B1000-memory.dmp

            Filesize

            10.8MB

          • memory/4848-111-0x00007FFED6CF0000-0x00007FFED77B1000-memory.dmp

            Filesize

            10.8MB