Analysis

  • max time kernel
    141s
  • max time network
    139s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250619-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250619-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31/07/2025, 11:53

General

  • Target
    3e5c3ca7b20c3e35115307d76acb8ca7724f30a009f883b2cd93a113040ef18b.exe
  • Size 3.4MB
  • Sample250731-n2mxcawkv3
  • SHA256 3e5c3ca7b20c3e35115307d76acb8ca7724f30a009f883b2cd93a113040ef18b
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 9 IoCs
  • Loads dropped DLL 4 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

    Using powershell.exe command.

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 10 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 30 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 41 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
      PID:3432
      • C:\Users\Admin\AppData\Local\Temp\3e5c3ca7b20c3e35115307d76acb8ca7724f30a009f883b2cd93a113040ef18b.exe
        "C:\Users\Admin\AppData\Local\Temp\3e5c3ca7b20c3e35115307d76acb8ca7724f30a009f883b2cd93a113040ef18b.exe"
        2⤵
        • Checks computer location settings
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3668
        • C:\Users\Admin\AppData\Roaming\kvub.exe
          "C:\Users\Admin\AppData\Roaming\kvub.exe"
          3⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:2188
          • C:\Users\Admin\AppData\Local\Temp\is-D2PIJ.tmp\kvub.tmp
            "C:\Users\Admin\AppData\Local\Temp\is-D2PIJ.tmp\kvub.tmp" /SL5="$90244,2345563,96256,C:\Users\Admin\AppData\Roaming\kvub.exe"
            4⤵
            • Checks computer location settings
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:3180
            • C:\Users\Admin\AppData\Roaming\kvub.exe
              "C:\Users\Admin\AppData\Roaming\kvub.exe" /VERYSILENT
              5⤵
              • Executes dropped EXE
              • System Location Discovery: System Language Discovery
              • Suspicious use of WriteProcessMemory
              PID:5732
              • C:\Users\Admin\AppData\Local\Temp\is-4UJGO.tmp\kvub.tmp
                "C:\Users\Admin\AppData\Local\Temp\is-4UJGO.tmp\kvub.tmp" /SL5="$90110,2345563,96256,C:\Users\Admin\AppData\Roaming\kvub.exe" /VERYSILENT
                6⤵
                • Executes dropped EXE
                • System Location Discovery: System Language Discovery
                • Suspicious use of FindShellTrayWindow
                • Suspicious use of WriteProcessMemory
                PID:4832
                • C:\Windows\SysWOW64\regsvr32.exe
                  "C:\Windows\system32\regsvr32.exe" /s /i:googlechromebusiness.msi "C:\Users\Admin\AppData\Local\9GoldenRod.pfx"
                  7⤵
                  • Loads dropped DLL
                  • System Location Discovery: System Language Discovery
                  • Suspicious use of WriteProcessMemory
                  PID:4668
                  • C:\Windows\system32\regsvr32.exe
                    /s /i:googlechromebusiness.msi "C:\Users\Admin\AppData\Local\9GoldenRod.pfx"
                    8⤵
                    • Loads dropped DLL
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of WriteProcessMemory
                    PID:5504
                    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                      "powershell" -Command "if (Get-ScheduledTask | Where-Object { $_.Actions.Execute -eq 'regsvr32' -and $_.Actions.Arguments -eq '/s /i:googlechromebusiness.msi \"\\?\C:\Users\Admin\AppData\Local\9GoldenRod.pfx\"' }) { exit 0 } else { exit 1 }"
                      9⤵
                      • Command and Scripting Interpreter: PowerShell
                      • Suspicious behavior: EnumeratesProcesses
                      • Suspicious use of AdjustPrivilegeToken
                      PID:4768
                    • C:\Windows\System32\WindowsPowerShell\v1.0\PowerShell.exe
                      "PowerShell.exe" -NoProfile -NonInteractive -Command -
                      9⤵
                      • Command and Scripting Interpreter: PowerShell
                      • Suspicious behavior: EnumeratesProcesses
                      • Suspicious use of AdjustPrivilegeToken
                      PID:5840
        • C:\Users\Admin\AppData\Roaming\zyuc.exe
          "C:\Users\Admin\AppData\Roaming\zyuc.exe"
          3⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Adds Run key to start application
          • System Location Discovery: System Language Discovery
          • Modifies registry class
          • Suspicious use of WriteProcessMemory
          PID:3444
          • C:\ProgramData\uktnd.exe
            "C:\ProgramData\uktnd.exe" /r
            4⤵
            • Executes dropped EXE
            PID:5564
        • C:\Users\Admin\AppData\Roaming\uibv.exe
          "C:\Users\Admin\AppData\Roaming\uibv.exe"
          3⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          PID:3884
        • C:\Users\Admin\AppData\Local\Temp\windscribe_checker.exe
          "C:\Users\Admin\AppData\Local\Temp\windscribe_checker.exe"
          3⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          PID:212
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c C:\ProgramData\uktnd.exe /r
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3248
        • C:\ProgramData\uktnd.exe
          C:\ProgramData\uktnd.exe /r
          3⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          PID:5532
    • C:\Windows\system32\regsvr32.EXE
      C:\Windows\system32\regsvr32.EXE /s /i:googlechromebusiness.msi "\\?\C:\Users\Admin\AppData\Local\9GoldenRod.pfx"
      1⤵
      • Loads dropped DLL
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1720
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command "if (Get-ScheduledTask | Where-Object { $_.Actions.Execute -eq 'regsvr32' -and $_.Actions.Arguments -eq '/s /i:googlechromebusiness.msi \"\\?\C:\Users\Admin\AppData\Local\9GoldenRod.pfx\"' }) { exit 0 } else { exit 1 }"
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        PID:1816
    • C:\Windows\system32\regsvr32.EXE
      C:\Windows\system32\regsvr32.EXE /s /i:googlechromebusiness.msi "\\?\C:\Users\Admin\AppData\Local\9GoldenRod.pfx"
      1⤵
      • Loads dropped DLL
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2004
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command "if (Get-ScheduledTask | Where-Object { $_.Actions.Execute -eq 'regsvr32' -and $_.Actions.Arguments -eq '/s /i:googlechromebusiness.msi \"\\?\C:\Users\Admin\AppData\Local\9GoldenRod.pfx\"' }) { exit 0 } else { exit 1 }"
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        PID:4060

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          9GoldenRod.pfx

          • Path C:\Users\Admin\AppData\Local\9GoldenRod.pfx
          • Size 6.2MB
          • SHA256 d9bb34432d0525326ebab46266735242363b9b7059ba3f5f5e81deaa4f714804
          • MD5 SHA1 SHA512 SSDEEP

          PowerShell.exe.log

          • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\PowerShell.exe.log
          • Size 3KB
          • SHA256 70c3ecbaa6df88e88df4efc70968502955e890a2248269641c4e2d4668ef61bf
          • MD5 SHA1 SHA512

          StartupProfileData-NonInteractive

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          • Size 1KB
          • SHA256 6588a9379ea6c9c12f813490c8c2373f9a7b683c0ece24f543d7856708e0e43e
          • MD5 SHA1 SHA512

          StartupProfileData-NonInteractive

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          • Size 1KB
          • SHA256 3c2714ce07f8c04b3f8222dfe50d8ae08f548b0e6e79fe33d08bf6f4c2e5143e
          • MD5 SHA1 SHA512

          StartupProfileData-NonInteractive

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          • Size 1KB
          • SHA256 2afeb7db4e46d3c1524512a73448e9cd0121deec761d8aa54fa9fe8b56df7519
          • MD5 SHA1 SHA512

          __PSScriptPolicyTest_vu4d3rqi.sly.ps1

          • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vu4d3rqi.sly.ps1
          • Size 60B
          • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
          • MD5 SHA1 SHA512

          _shfoldr.dll

          • Path C:\Users\Admin\AppData\Local\Temp\is-7S91K.tmp\_isetup\_shfoldr.dll
          • Size 22KB
          • SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
          • MD5 SHA1 SHA512 SSDEEP

          kvub.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\is-D2PIJ.tmp\kvub.tmp
          • Size 728KB
          • SHA256 f91838fde79f347786a2a114ccb57bfa6086840d625b6ede208201a4709f3e7a
          • MD5 SHA1 SHA512 SSDEEP

          windscribe_checker.exe

          • Path C:\Users\Admin\AppData\Local\Temp\windscribe_checker.exe
          • Size 614KB
          • SHA256 4157ffc8fc2ef30116936a8292c714d89583f4103d17748db6e1f88c4cf155e3
          • MD5 SHA1 SHA512 SSDEEP

          kvub.exe

          • Path C:\Users\Admin\AppData\Roaming\kvub.exe
          • Size 2.5MB
          • SHA256 cdf5aa128d39be84e18b486d7bfa7bc11fc10fe5ee07879af92195ce31de945a
          • MD5 SHA1 SHA512 SSDEEP

          uibv.exe

          • Path C:\Users\Admin\AppData\Roaming\uibv.exe
          • Size 221KB
          • SHA256 3e1aa9a65ea9ac0969e5a881e20e45b54e91415001419be3958284adce179cae
          • MD5 SHA1 SHA512 SSDEEP

          zyuc.exe

          • Path C:\Users\Admin\AppData\Roaming\zyuc.exe
          • Size 16KB
          • SHA256 1bbdcc5b5289aa6fda46bc95df96207b02fddafc13b9b0d436516fbc81a1f05a
          • MD5 SHA1 SHA512 SSDEEP

          memory/212-138-0x0000000000400000-0x00000000004A0000-memory.dmp

          memory/1720-169-0x00007FF824E40000-0x00007FF82548C000-memory.dmp

          memory/2004-192-0x00007FF8252E0000-0x00007FF82592C000-memory.dmp

          memory/2188-19-0x0000000000400000-0x000000000041E000-memory.dmp

          memory/2188-94-0x0000000000400000-0x000000000041E000-memory.dmp

          memory/2188-18-0x000000000040D000-0x000000000040E000-memory.dmp

          memory/3180-81-0x0000000000400000-0x00000000004C6000-memory.dmp

          memory/3180-48-0x0000000000400000-0x00000000004C6000-memory.dmp

          memory/3432-144-0x00000000026F0000-0x000000000270D000-memory.dmp

          memory/3432-146-0x00000000026F0000-0x000000000270D000-memory.dmp

          memory/4768-114-0x0000019B2D520000-0x0000019B2D542000-memory.dmp

          memory/4832-111-0x0000000000400000-0x00000000004C6000-memory.dmp

          memory/5504-140-0x0000000048150000-0x0000000048167000-memory.dmp

          memory/5504-145-0x00007FF825010000-0x00007FF82565C000-memory.dmp

          memory/5504-139-0x00007FF825010000-0x00007FF82565C000-memory.dmp

          memory/5732-112-0x0000000000400000-0x000000000041E000-memory.dmp

          memory/5732-62-0x0000000000400000-0x000000000041E000-memory.dmp