Analysis

  • user interaction
    yes
  • max time kernel
    231s
  • max time network
    227s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-ja
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-jalocale:ja-jpos:windows10-2004-x64systemwindows
  • submitted
    20/08/2026, 09:05

General

  • Target
    hdp.dll
  • Size 5.8MB
  • Sample260820-k2mpsscd59
  • SHA256 b658fdb91cc66e571b36c9f75e9af7f9aed1b85f500c2d4656d6173bfe1f5bd1
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Badlisted process makes network request 8 IoCs

    Network request originating from process or tool commonly abused by malware.

  • Executes dropped EXE 1 IoCs
  • Enumerates connected drives 3 TTPs 22 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Looks up external IP address via web service 1 TTPs 4 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Discovers running processes 1 TTPs 4 IoCs

    Running process information can be used to identify security tools or plan follow-on actions.

  • Drops file in System32 directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Executes a command shell one-liner 1 TTPs 2 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

  • System Location Discovery: System Language Discovery 1 TTPs 17 IoCs

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

  • Checks processor information in registry 2 TTPs 22 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Delays execution with timeout.exe 4 IoCs
  • Kills process with taskkill 1 IoCs
  • Modifies registry class 4 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of FindShellTrayWindow 8 IoCs
  • Suspicious use of SetWindowsHookEx 34 IoCs
  • Suspicious use of WriteProcessMemory 54 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.

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\hdp.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3856
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\hdp.dll,#1
      2⤵
      • Badlisted process makes network request
      • Enumerates connected drives
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:5256
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /f /im cmd.exe
        3⤵
        • System Location Discovery: System Language Discovery
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:3580
      • C:\Windows\SysWOW64\cmd.exe
        cmd.exe /c start "" /B cmd /C C:\ProgramData\S-1-5-21-1788976790-1541110888-1636651838\S-1-5-21-1788976790-1541110888-1636651838.CMD
        3⤵
        • Executes a command shell one-liner
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1000
        • C:\Windows\SysWOW64\cmd.exe
          cmd /C C:\ProgramData\S-1-5-21-1788976790-1541110888-1636651838\S-1-5-21-1788976790-1541110888-1636651838.CMD
          4⤵
          • Executes a command shell one-liner
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:4836
          • C:\Windows\SysWOW64\tasklist.exe
            TASKLIST /FI "IMAGENAME eq rundll32.exe" /FO CSV
            5⤵
            • Discovers running processes
            • System Location Discovery: System Language Discovery
            • Suspicious use of AdjustPrivilegeToken
            PID:884
          • C:\Windows\SysWOW64\find.exe
            FIND /I "rundll32.exe"
            5⤵
            • System Location Discovery: System Language Discovery
            PID:2576
          • C:\Windows\SysWOW64\timeout.exe
            TIMEOUT /t 60 /nobreak
            5⤵
            • System Location Discovery: System Language Discovery
            • Delays execution with timeout.exe
            PID:5816
          • C:\Windows\SysWOW64\tasklist.exe
            TASKLIST /FI "IMAGENAME eq rundll32.exe" /FO CSV
            5⤵
            • Discovers running processes
            • System Location Discovery: System Language Discovery
            • Suspicious use of AdjustPrivilegeToken
            PID:4480
          • C:\Windows\SysWOW64\find.exe
            FIND /I "rundll32.exe"
            5⤵
            • System Location Discovery: System Language Discovery
            PID:2192
          • C:\Windows\SysWOW64\timeout.exe
            TIMEOUT /t 60 /nobreak
            5⤵
            • System Location Discovery: System Language Discovery
            • Delays execution with timeout.exe
            PID:1824
          • C:\Windows\SysWOW64\tasklist.exe
            TASKLIST /FI "IMAGENAME eq rundll32.exe" /FO CSV
            5⤵
            • Discovers running processes
            • System Location Discovery: System Language Discovery
            • Suspicious use of AdjustPrivilegeToken
            PID:4656
          • C:\Windows\SysWOW64\find.exe
            FIND /I "rundll32.exe"
            5⤵
            • System Location Discovery: System Language Discovery
            PID:5176
          • C:\Windows\SysWOW64\timeout.exe
            TIMEOUT /t 60 /nobreak
            5⤵
            • System Location Discovery: System Language Discovery
            • Delays execution with timeout.exe
            PID:4744
          • C:\Windows\SysWOW64\tasklist.exe
            TASKLIST /FI "IMAGENAME eq rundll32.exe" /FO CSV
            5⤵
            • Discovers running processes
            • System Location Discovery: System Language Discovery
            • Suspicious use of AdjustPrivilegeToken
            PID:3068
          • C:\Windows\SysWOW64\find.exe
            FIND /I "rundll32.exe"
            5⤵
            • System Location Discovery: System Language Discovery
            PID:4232
          • C:\Windows\SysWOW64\timeout.exe
            TIMEOUT /t 60 /nobreak
            5⤵
            • System Location Discovery: System Language Discovery
            • Delays execution with timeout.exe
            PID:4264
  • C:\Windows\SysWOW64\rundll32.exe
    C:\Windows\SysWOW64\rundll32.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5404
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:4512
    • C:\Windows\system32\OpenWith.exe
      C:\Windows\system32\OpenWith.exe -Embedding
      1⤵
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      PID:2544
    • C:\Windows\system32\OpenWith.exe
      C:\Windows\system32\OpenWith.exe -Embedding
      1⤵
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1232
      • C:\Program Files\Mozilla Firefox\firefox.exe
        "C:\Program Files\Mozilla Firefox\firefox.exe" -osint -url "C:\Users\Admin\AppData\Local\Temp\hdp.dll"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3576
        • C:\Program Files\Mozilla Firefox\firefox.exe
          "C:\Program Files\Mozilla Firefox\firefox.exe" -osint -url C:\Users\Admin\AppData\Local\Temp\hdp.dll
          3⤵
          • Checks processor information in registry
          • Modifies registry class
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2920
          • C:\Program Files\Mozilla Firefox\firefox.exe
            "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 2008 -prefsLen 27099 -prefMapHandle 2012 -prefMapSize 270279 -ipcHandle 2100 -initialChannelId {f7c9ada3-0539-46da-bba0-39fb04012e83} -parentPid 2920 -crashReporter "\\.\pipe\gecko-crash-server-pipe.2920" -appDir "C:\Program Files\Mozilla Firefox\browser" - 1 gpu
            4⤵
              PID:6136
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 2500 -prefsLen 27135 -prefMapHandle 2504 -prefMapSize 270279 -ipcHandle 2512 -initialChannelId {3d292241-3cfc-449c-84af-15da07b1ebc1} -parentPid 2920 -crashReporter "\\.\pipe\gecko-crash-server-pipe.2920" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 2 socket
              4⤵
              • Checks processor information in registry
              PID:2180
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 3768 -prefsLen 27276 -prefMapHandle 3772 -prefMapSize 270279 -jsInitHandle 3776 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 3784 -initialChannelId {f5db027f-20ed-4431-878d-15b710d246d8} -parentPid 2920 -crashReporter "\\.\pipe\gecko-crash-server-pipe.2920" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 3 tab
              4⤵
              • Checks processor information in registry
              PID:5388
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 3940 -prefsLen 27276 -prefMapHandle 3944 -prefMapSize 270279 -ipcHandle 4036 -initialChannelId {ae03c8fb-25d6-4cc3-8399-9a567ea10b53} -parentPid 2920 -crashReporter "\\.\pipe\gecko-crash-server-pipe.2920" -appDir "C:\Program Files\Mozilla Firefox\browser" - 4 rdd
              4⤵
                PID:4204
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 1640 -prefsLen 34775 -prefMapHandle 1668 -prefMapSize 270279 -jsInitHandle 2672 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 4240 -initialChannelId {46cf6ba5-2ce3-4210-85d6-fddad2139154} -parentPid 2920 -crashReporter "\\.\pipe\gecko-crash-server-pipe.2920" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 5 tab
                4⤵
                • Checks processor information in registry
                PID:6028
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -sandboxingKind 0 -prefsHandle 5156 -prefsLen 35012 -prefMapHandle 5160 -prefMapSize 270279 -ipcHandle 5168 -initialChannelId {fb4560e0-db58-4e7b-95ba-b356b9a13f82} -parentPid 2920 -crashReporter "\\.\pipe\gecko-crash-server-pipe.2920" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 6 utility
                4⤵
                • Checks processor information in registry
                PID:5372
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 5116 -prefsLen 32900 -prefMapHandle 5128 -prefMapSize 270279 -jsInitHandle 5212 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5268 -initialChannelId {a95e2ee9-6bac-44ed-91f7-1a3f8b9b1eb9} -parentPid 2920 -crashReporter "\\.\pipe\gecko-crash-server-pipe.2920" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 7 tab
                4⤵
                • Checks processor information in registry
                PID:5204
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 5288 -prefsLen 32900 -prefMapHandle 5292 -prefMapSize 270279 -jsInitHandle 5296 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5304 -initialChannelId {c72cab4f-4cc8-4bb3-9521-a19831e745d7} -parentPid 2920 -crashReporter "\\.\pipe\gecko-crash-server-pipe.2920" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 8 tab
                4⤵
                • Checks processor information in registry
                PID:1644
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 5676 -prefsLen 32952 -prefMapHandle 5680 -prefMapSize 270279 -jsInitHandle 5684 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5692 -initialChannelId {de116d33-b40d-4a26-a145-7634daba7bfa} -parentPid 2920 -crashReporter "\\.\pipe\gecko-crash-server-pipe.2920" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 9 tab
                4⤵
                • Checks processor information in registry
                PID:656
        • C:\Windows\system32\OpenWith.exe
          C:\Windows\system32\OpenWith.exe -Embedding
          1⤵
          • Modifies registry class
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:4652
          • C:\Windows\system32\NOTEPAD.EXE
            "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\hdp.dll
            2⤵
            • Opens file in notepad (likely ransom note)
            PID:3024
        • C:\Windows\system32\cmd.exe
          "C:\Windows\system32\cmd.exe"
          1⤵
            PID:4156

          Network

                MITRE ATT&CK Enterprise v16

                Replay Monitor

                Loading Replay Monitor...

                Downloads

                S-1-5-21-1788976790-1541110888-1636651838.CMD

                • Path C:\ProgramData\S-1-5-21-1788976790-1541110888-1636651838\S-1-5-21-1788976790-1541110888-1636651838.CMD
                • Size 1KB
                • SHA256 996ec717ba384bb3bcf7fe020356929fdb89b62f56a4562b929da5837edce009
                • MD5 SHA1 SHA512 TLSH

                data.safe.tmp

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\datareporting\glean\db\data.safe.tmp
                • Size 6KB
                • SHA256 765a858fd6cfff51382b65204fe920a06d263697cd1e1e44e4cdc2cb827b147f
                • MD5 SHA1 SHA512 SSDEEP TLSH

                data.safe.tmp

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\datareporting\glean\db\data.safe.tmp
                • Size 6KB
                • SHA256 c2f12a01ee6dce4cb3fae48266f7d4bd990d51f6d22f8a60785eedf0474d5c7b
                • MD5 SHA1 SHA512 SSDEEP TLSH

                data.safe.tmp

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\datareporting\glean\db\data.safe.tmp
                • Size 6KB
                • SHA256 c93f4ab66a07e84d18ff5edd458ccf76856093719ba0a3ba5523185457cc79c9
                • MD5 SHA1 SHA512 SSDEEP TLSH

                events

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\datareporting\glean\events\events
                • Size 1KB
                • SHA256 aa25556db975a3e0246c359c8ca849ff69b512954c7ccb949cffe71d878bbb95
                • MD5 SHA1 SHA512 TLSH

                109803dd-2b8e-4572-938e-d1038aeb9105

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\datareporting\glean\pending_pings\109803dd-2b8e-4572-938e-d1038aeb9105
                • Size 2KB
                • SHA256 87b1c24161068a5f5cba5a9845534ff824e90c9110d09a34cb227f386197d497
                • MD5 SHA1 SHA512 TLSH

                178264b1-5760-4962-a3fa-b5e293e369e6

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\datareporting\glean\pending_pings\178264b1-5760-4962-a3fa-b5e293e369e6
                • Size 235B
                • SHA256 db71d877aaa5c644c7b1f187ceee15477d51f7b0fe6980281d401766225fa0ce
                • MD5 SHA1 SHA512 TLSH

                23746b8b-a3b2-4c22-a78b-72907752adcd

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\datareporting\glean\pending_pings\23746b8b-a3b2-4c22-a78b-72907752adcd
                • Size 883B
                • SHA256 349aa7d71b78789426a6bd6f5faf9d7a99f81770af0c936c271ca1b79c323f7b
                • MD5 SHA1 SHA512 TLSH

                3f794aaf-bb10-4a48-8c52-be8225db91ae

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\datareporting\glean\pending_pings\3f794aaf-bb10-4a48-8c52-be8225db91ae
                • Size 235B
                • SHA256 605d7b66d8fd03e00e1f630c046a323e9b3785e478e5ba7570d6cea43fd7d3ed
                • MD5 SHA1 SHA512 TLSH

                6fa32249-699b-40c8-8e66-ec070d1b03f4

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\datareporting\glean\pending_pings\6fa32249-699b-40c8-8e66-ec070d1b03f4
                • Size 15KB
                • SHA256 2dd21736bfbb775e8f6397dad32180c970be06f02ce13d285feb81f1326f034a
                • MD5 SHA1 SHA512 SSDEEP TLSH

                853dd8a4-8f41-42bf-80ee-d19d9ab8dcab

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\datareporting\glean\pending_pings\853dd8a4-8f41-42bf-80ee-d19d9ab8dcab
                • Size 886B
                • SHA256 97c9d82fd9d0b05aa1d04c8376c15058848019f09ac2aa66afb2911eec56c3b0
                • MD5 SHA1 SHA512 TLSH

                prefs.js

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\prefs.js
                • Size 6KB
                • SHA256 550c793ab6248dc68634ece1eb1e3e0192d473f79cd2c0f30f5e090c3c6c379e
                • MD5 SHA1 SHA512 SSDEEP TLSH

                prefs.js

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\prefs.js
                • Size 6KB
                • SHA256 d91b36f453526ecea47e68d63512f48df837ebb930f8b6d00a4db3603aa07df8
                • MD5 SHA1 SHA512 SSDEEP TLSH

                sessionCheckpoints.json

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\sessionCheckpoints.json
                • Size 259B
                • SHA256 50a670fb78ff2712aae2c16d9499e01c15fddf24e229330d02a69b0527a38092
                • MD5 SHA1 SHA512 TLSH

                hdp.dll

                • Path C:\Users\Admin\Downloads\hdp.dll
                • Size 5.8MB
                • SHA256 b658fdb91cc66e571b36c9f75e9af7f9aed1b85f500c2d4656d6173bfe1f5bd1
                • MD5 SHA1 SHA512 SSDEEP TLSH

                rundll32.exe

                • Path C:\Windows\SysWOW64\rundll32.exe
                • Size 60KB
                • SHA256 6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910
                • MD5 SHA1 SHA512 SSDEEP TLSH

                memory/5256-14-0x0000000002AE0000-0x0000000002B38000-memory.dmp

                memory/5256-7-0x0000000002940000-0x0000000002993000-memory.dmp

                memory/5256-8-0x0000000002AE0000-0x0000000002B38000-memory.dmp

                memory/5256-12-0x0000000002AE0000-0x0000000002B38000-memory.dmp

                memory/5256-15-0x0000000002AE0000-0x0000000002B38000-memory.dmp

                memory/5256-9-0x0000000002AE0000-0x0000000002B38000-memory.dmp

                memory/5256-17-0x0000000002AE0000-0x0000000002B38000-memory.dmp