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Analysis

  • max time kernel
    1795s
  • max time network
    1800s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/09/2024, 00:34

General

  • Target

    SilverClient.exe

  • Size

    42KB

  • MD5

    e32cc14226ce47c9342ed347c7a47438

  • SHA1

    a8ec8484eebdd76d38988007a21afe56cbeaf951

  • SHA256

    59dd74a25d62b758529d2a9bfd5fefde30077b26249116ceffd01ce16b2688fa

  • SHA512

    b164661ca40c386843b00cbeff8a86157a23f0e4c5e539fe596fad8786a1752ef50eaa65590a65ae1ca6512e720e3501fece61381b921f55e3ec4855f91bfc63

  • SSDEEP

    768:MiIsJJcPlV1csUxJRBN/l+cJn6590BcmSHrlruPXr7yaaxLEt0URohRULL9S+1fr:MiIsDctUBbn659XTkt0UQGf9Zr1QoE9W

Malware Config

Signatures

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Using powershell.exe command.

  • Enumerates physical storage devices 1 TTPs

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

  • Delays execution with timeout.exe 2 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 29 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 26 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.

  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\SilverClient.exe
    "C:\Users\Admin\AppData\Local\Temp\SilverClient.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3344
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp863.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4392
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:1564
      • C:\Users\Admin\test\$77test.exe
        "C:\Users\Admin\test\$77test.exe"
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:4288
        • C:\Windows\SYSTEM32\schtasks.exe
          "schtasks.exe" /query /TN $77test.exe
          4⤵
            PID:2248
          • C:\Windows\SYSTEM32\schtasks.exe
            "schtasks.exe" /Create /SC ONCE /TN "$77test.exe" /TR "C:\Users\Admin\test\$77test.exe \"\$77test.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
            4⤵
            • Scheduled Task/Job: Scheduled Task
            PID:5104
          • C:\Windows\SYSTEM32\schtasks.exe
            "schtasks.exe" /query /TN $77test.exe
            4⤵
              PID:3616
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Set-MpPreference -ExclusionExtension exe,bat,dll,ps1;exit
              4⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:5076
            • C:\Windows\System32\schtasks.exe
              "C:\Windows\System32\schtasks.exe" /create /sc daily /tn "test_Task-DAILY-21PM" /TR "%MyFile%" /ST 21:00
              4⤵
              • Scheduled Task/Job: Scheduled Task
              PID:3732
            • C:\Windows\SYSTEM32\schtasks.exe
              "schtasks.exe" /query /TN $77test.exe
              4⤵
                PID:2420
              • C:\Windows\System32\cmd.exe
                "C:\Windows\System32\cmd.exe" /c schtasks /delete /f /tn "$77test_Task"
                4⤵
                • Suspicious use of WriteProcessMemory
                PID:660
                • C:\Windows\system32\schtasks.exe
                  schtasks /delete /f /tn "$77test_Task"
                  5⤵
                    PID:428
                • C:\Windows\system32\cmd.exe
                  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC7C2.tmp.bat""
                  4⤵
                  • Suspicious use of WriteProcessMemory
                  PID:2924
                  • C:\Windows\system32\timeout.exe
                    timeout 3
                    5⤵
                    • Delays execution with timeout.exe
                    PID:936
          • C:\Windows\system32\vssvc.exe
            C:\Windows\system32\vssvc.exe
            1⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:3788
          • 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 --field-trial-handle=4120,i,1729213506309163284,12809566808978835441,262144 --variations-seed-version --mojo-platform-channel-handle=4036 /prefetch:8
            1⤵
              PID:3964
            • 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 --field-trial-handle=4048,i,1729213506309163284,12809566808978835441,262144 --variations-seed-version --mojo-platform-channel-handle=1420 /prefetch:8
              1⤵
                PID:4904

              Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

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              Downloads

              • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5its14hp.jrh.ps1

                Filesize

                60B

                MD5

                d17fe0a3f47be24a6453e9ef58c94641

                SHA1

                6ab83620379fc69f80c0242105ddffd7d98d5d9d

                SHA256

                96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

                SHA512

                5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

              • C:\Users\Admin\AppData\Local\Temp\tmp863.tmp.bat

                Filesize

                139B

                MD5

                9cf77823ae2e50e1a1c8733e3121a75d

                SHA1

                c7ebfead12bbb09a47367b788fd266706c170829

                SHA256

                152c16b78b689512de9c97e71fee474ccc77f6aea73716257dd9ef93d9bf8355

                SHA512

                d428063a6c256144789d096f9ce45037a0649bbea804751a6473635e2ac4e99a23a32a4b7c06da45142169b73c8457188161e46124a832053c7710703bd5ad20

              • C:\Users\Admin\AppData\Local\Temp\tmpC7C2.tmp.bat

                Filesize

                213B

                MD5

                faed5d5ac1304c34f507a641eeb98f43

                SHA1

                f368c11ddfff321f8a33ecce0e44ebaf5ff281e4

                SHA256

                6c31b2dceb479c181e0f12c0208ecf289394805d642b9dd2b0af29abb4c3aa53

                SHA512

                c502faf88f7989d93fc4e80819c44ac322ebd011abc1efe95b60e4712cd34e9d2667f2b0c5c2baaa4de4d3209626c8bf1b3ce0cf752b7e47f7215dfaad9ad9d6

              • C:\Users\Admin\test\$77test.exe

                Filesize

                42KB

                MD5

                e32cc14226ce47c9342ed347c7a47438

                SHA1

                a8ec8484eebdd76d38988007a21afe56cbeaf951

                SHA256

                59dd74a25d62b758529d2a9bfd5fefde30077b26249116ceffd01ce16b2688fa

                SHA512

                b164661ca40c386843b00cbeff8a86157a23f0e4c5e539fe596fad8786a1752ef50eaa65590a65ae1ca6512e720e3501fece61381b921f55e3ec4855f91bfc63

              • memory/3344-10-0x00007FFA2F050000-0x00007FFA2FB11000-memory.dmp

                Filesize

                10.8MB

              • memory/3344-4-0x00007FFA2F050000-0x00007FFA2FB11000-memory.dmp

                Filesize

                10.8MB

              • memory/3344-1-0x0000000000DB0000-0x0000000000DC0000-memory.dmp

                Filesize

                64KB

              • memory/3344-3-0x00007FFA2F053000-0x00007FFA2F055000-memory.dmp

                Filesize

                8KB

              • memory/3344-2-0x00007FFA2F050000-0x00007FFA2FB11000-memory.dmp

                Filesize

                10.8MB

              • memory/3344-0-0x00007FFA2F053000-0x00007FFA2F055000-memory.dmp

                Filesize

                8KB

              • memory/4288-26-0x0000000002D70000-0x0000000002D86000-memory.dmp

                Filesize

                88KB

              • memory/4288-27-0x000000001D890000-0x000000001D8B0000-memory.dmp

                Filesize

                128KB

              • memory/5076-19-0x00000246B3910000-0x00000246B3932000-memory.dmp

                Filesize

                136KB