Analysis

  • user interaction
    yes
  • max time kernel
    240s
  • max time network
    240s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-ja
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-jalocale:ja-jpos:windows11-ltsc_2024-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 7 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 23 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 3 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 7 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:4236
    • 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:4256
      • 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:3188
      • C:\Windows\SysWOW64\cmd.exe
        cmd.exe /c start "" /B cmd /C C:\ProgramData\S-1-5-21-552508041-2681165170-3229858294\S-1-5-21-552508041-2681165170-3229858294.CMD
        3⤵
        • Executes a command shell one-liner
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1020
        • C:\Windows\SysWOW64\cmd.exe
          cmd /C C:\ProgramData\S-1-5-21-552508041-2681165170-3229858294\S-1-5-21-552508041-2681165170-3229858294.CMD
          4⤵
          • Executes a command shell one-liner
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:3768
          • 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:5964
          • C:\Windows\SysWOW64\find.exe
            FIND /I "rundll32.exe"
            5⤵
            • System Location Discovery: System Language Discovery
            PID:3020
          • C:\Windows\SysWOW64\timeout.exe
            TIMEOUT /t 60 /nobreak
            5⤵
            • System Location Discovery: System Language Discovery
            • Delays execution with timeout.exe
            PID:256
          • 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:3724
          • C:\Windows\SysWOW64\find.exe
            FIND /I "rundll32.exe"
            5⤵
            • System Location Discovery: System Language Discovery
            PID:700
          • C:\Windows\SysWOW64\timeout.exe
            TIMEOUT /t 60 /nobreak
            5⤵
            • System Location Discovery: System Language Discovery
            • Delays execution with timeout.exe
            PID:2104
          • 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:5204
          • C:\Windows\SysWOW64\find.exe
            FIND /I "rundll32.exe"
            5⤵
            • System Location Discovery: System Language Discovery
            PID:2332
          • C:\Windows\SysWOW64\timeout.exe
            TIMEOUT /t 60 /nobreak
            5⤵
            • System Location Discovery: System Language Discovery
            • Delays execution with timeout.exe
            PID:4992
          • 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:4376
          • C:\Windows\SysWOW64\find.exe
            FIND /I "rundll32.exe"
            5⤵
            • System Location Discovery: System Language Discovery
            PID:2556
          • C:\Windows\SysWOW64\timeout.exe
            TIMEOUT /t 60 /nobreak
            5⤵
            • System Location Discovery: System Language Discovery
            • Delays execution with timeout.exe
            PID:2804
  • C:\Windows\SysWOW64\rundll32.exe
    C:\Windows\SysWOW64\rundll32.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3144
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:4496
    • C:\Windows\system32\OpenWith.exe
      C:\Windows\system32\OpenWith.exe -Embedding
      1⤵
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1476
      • 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:4116
        • 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:6072
          • C:\Program Files\Mozilla Firefox\firefox.exe
            "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 1968 -prefsLen 27098 -prefMapHandle 1972 -prefMapSize 270279 -ipcHandle 1440 -initialChannelId {376ef499-fe5f-4688-a42d-b73e3ec4e364} -parentPid 6072 -crashReporter "\\.\pipe\gecko-crash-server-pipe.6072" -appDir "C:\Program Files\Mozilla Firefox\browser" - 1 gpu
            4⤵
              PID:5172
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 2432 -prefsLen 27134 -prefMapHandle 2436 -prefMapSize 270279 -ipcHandle 2444 -initialChannelId {fd82dbf8-cb03-49c3-8ceb-05b2a32d9eb2} -parentPid 6072 -crashReporter "\\.\pipe\gecko-crash-server-pipe.6072" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 2 socket
              4⤵
              • Checks processor information in registry
              PID:5708
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 3772 -prefsLen 27274 -prefMapHandle 3776 -prefMapSize 270279 -jsInitHandle 3780 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 3788 -initialChannelId {01349616-c830-4cae-90eb-5400df1397ab} -parentPid 6072 -crashReporter "\\.\pipe\gecko-crash-server-pipe.6072" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 3 tab
              4⤵
              • Checks processor information in registry
              PID:1312
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 3952 -prefsLen 27274 -prefMapHandle 3956 -prefMapSize 270279 -ipcHandle 4036 -initialChannelId {b930961c-20f3-49f6-b8c5-f7fe5f9a4f4e} -parentPid 6072 -crashReporter "\\.\pipe\gecko-crash-server-pipe.6072" -appDir "C:\Program Files\Mozilla Firefox\browser" - 4 rdd
              4⤵
                PID:5196
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 4336 -prefsLen 34773 -prefMapHandle 4340 -prefMapSize 270279 -jsInitHandle 4344 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 4352 -initialChannelId {9e2b7eb2-0917-4cb7-9311-f4a8a7b73fda} -parentPid 6072 -crashReporter "\\.\pipe\gecko-crash-server-pipe.6072" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 5 tab
                4⤵
                • Checks processor information in registry
                PID:4388
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -sandboxingKind 0 -prefsHandle 5208 -prefsLen 35010 -prefMapHandle 5212 -prefMapSize 270279 -ipcHandle 5220 -initialChannelId {46583f88-cd8c-4228-8057-5ae151fc80e2} -parentPid 6072 -crashReporter "\\.\pipe\gecko-crash-server-pipe.6072" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 6 utility
                4⤵
                • Checks processor information in registry
                PID:6320
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 2940 -prefsLen 32952 -prefMapHandle 5144 -prefMapSize 270279 -jsInitHandle 5148 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 4952 -initialChannelId {dcf6f9db-f703-4eba-a2f1-515f38a5e768} -parentPid 6072 -crashReporter "\\.\pipe\gecko-crash-server-pipe.6072" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 7 tab
                4⤵
                • Checks processor information in registry
                PID:6532
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 5736 -prefsLen 32952 -prefMapHandle 5740 -prefMapSize 270279 -jsInitHandle 5744 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5752 -initialChannelId {a5dc3ec2-452b-4e82-938f-011218468c0d} -parentPid 6072 -crashReporter "\\.\pipe\gecko-crash-server-pipe.6072" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 8 tab
                4⤵
                • Checks processor information in registry
                PID:6540
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 5924 -prefsLen 32952 -prefMapHandle 5928 -prefMapSize 270279 -jsInitHandle 5932 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5940 -initialChannelId {597f3294-c7a1-46ec-9eb9-3cfbb3ce27fb} -parentPid 6072 -crashReporter "\\.\pipe\gecko-crash-server-pipe.6072" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 9 tab
                4⤵
                • Checks processor information in registry
                PID:6548
        • C:\Windows\system32\OpenWith.exe
          C:\Windows\system32\OpenWith.exe -Embedding
          1⤵
          • Modifies registry class
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:5100
          • 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:5444
        • C:\Windows\system32\cmd.exe
          "C:\Windows\system32\cmd.exe"
          1⤵
            PID:6184

          Network

                MITRE ATT&CK Enterprise v16

                Replay Monitor

                Loading Replay Monitor...

                Downloads

                S-1-5-21-552508041-2681165170-3229858294.CMD

                • Path C:\ProgramData\S-1-5-21-552508041-2681165170-3229858294\S-1-5-21-552508041-2681165170-3229858294.CMD
                • Size 1KB
                • SHA256 ec61a7a64a601257259da3874ac028c02748d92e9b0050234eff845258a9e773
                • MD5 SHA1 SHA512 TLSH

                data.safe.tmp

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\fu4ot18b.default-release\datareporting\glean\db\data.safe.tmp
                • Size 7KB
                • SHA256 609a68ef75f2a16afd8fce0363c370f09102c5fc7e3afa62f97fa35d2e10792c
                • MD5 SHA1 SHA512 SSDEEP TLSH

                events

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\fu4ot18b.default-release\datareporting\glean\events\events
                • Size 1KB
                • SHA256 4451c40848da39e8f39d722e218eaf980f55984fd2187f63b74bd9f74e834377
                • MD5 SHA1 SHA512 TLSH

                0c96a618-4fa3-46b1-9ee6-7c1425a2e021

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\fu4ot18b.default-release\datareporting\glean\pending_pings\0c96a618-4fa3-46b1-9ee6-7c1425a2e021
                • Size 15KB
                • SHA256 7a48ec8a21f84a6c1f1371d2db6a9f47fafbe56a2192045f39a1532d8a3690be
                • MD5 SHA1 SHA512 SSDEEP TLSH

                306bf463-0243-4731-9742-38f95eb59918

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\fu4ot18b.default-release\datareporting\glean\pending_pings\306bf463-0243-4731-9742-38f95eb59918
                • Size 886B
                • SHA256 ab80d6d85f3a2edd84a062e93f934aad64e631fa4a59f319f5460bb3538f44d9
                • MD5 SHA1 SHA512 TLSH

                4d0c41b1-8ebf-414d-983b-1eb633b95482

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\fu4ot18b.default-release\datareporting\glean\pending_pings\4d0c41b1-8ebf-414d-983b-1eb633b95482
                • Size 883B
                • SHA256 827e673e1d7cd62f3c075c73b536fae8b9277c30c25ad56cb427aa9a89135978
                • MD5 SHA1 SHA512 TLSH

                873e406a-0be7-41bb-a3b6-2ccef959893e

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\fu4ot18b.default-release\datareporting\glean\pending_pings\873e406a-0be7-41bb-a3b6-2ccef959893e
                • Size 235B
                • SHA256 cd885321fb60ad9cc084baa49e4838516dc6e074a1ea08a5ee73c5d9e0d5c879
                • MD5 SHA1 SHA512 TLSH

                9d63a92d-7064-498d-a888-ec35076cd7e3

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\fu4ot18b.default-release\datareporting\glean\pending_pings\9d63a92d-7064-498d-a888-ec35076cd7e3
                • Size 235B
                • SHA256 3631ca0829527b6da13af5f14faedaab72af91beeb506429de0c387962813e52
                • MD5 SHA1 SHA512 TLSH

                b78e1f44-b7c3-47b4-9d82-12c66d6435a7

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\fu4ot18b.default-release\datareporting\glean\pending_pings\b78e1f44-b7c3-47b4-9d82-12c66d6435a7
                • Size 2KB
                • SHA256 b5b3ab12973456ab8512db7ac46876e55c2b7c5895c2132e02684bfb47666c76
                • MD5 SHA1 SHA512 TLSH

                prefs.js

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\fu4ot18b.default-release\prefs.js
                • Size 6KB
                • SHA256 d091bc653bcd1bcba44087a4b7cf85fc51612f1c056e2d92ae9eb8e1ff29427a
                • MD5 SHA1 SHA512 SSDEEP TLSH

                prefs.js

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\fu4ot18b.default-release\prefs.js
                • Size 6KB
                • SHA256 27a666744f0d4d4a9e06086f4475d14349bd27e48bb74204b9258597cdb3ac8f
                • MD5 SHA1 SHA512 SSDEEP TLSH

                prefs.js

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\fu4ot18b.default-release\prefs.js
                • Size 6KB
                • SHA256 e58bc4e2d5915bf429804503de5b9a6fe35b2c1151da283ed7cbfcf9d097e6cb
                • MD5 SHA1 SHA512 SSDEEP TLSH

                sessionCheckpoints.json.tmp

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\fu4ot18b.default-release\sessionCheckpoints.json.tmp
                • Size 288B
                • SHA256 2fca1f29b73dd5b4159fa1eb16e69276482f5224ba7d2219a547039129a51f0e
                • MD5 SHA1 SHA512 TLSH

                3870112724rsegmnoittet-es.sqlite

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\fu4ot18b.default-release\storage\permanent\chrome\idb\3870112724rsegmnoittet-es.sqlite
                • Size 5.0MB
                • SHA256 c9c699e4f0943ea3f67d760fb9538ddfe2c8b0d8988242312d190936d393eb2f
                • MD5 SHA1 SHA512 SSDEEP 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 51KB
                • SHA256 ce6bb7eddc83762c708d4a41709ae00371dbdc09b2a380f28fa60b1edf917473
                • MD5 SHA1 SHA512 SSDEEP TLSH

                memory/1476-24-0x0000021304790000-0x00000213049EF000-memory.dmp

                memory/4256-12-0x00000000043A0000-0x00000000043F8000-memory.dmp

                memory/4256-11-0x00000000043A0000-0x00000000043F8000-memory.dmp

                memory/4256-9-0x00000000043A0000-0x00000000043F8000-memory.dmp

                memory/4256-7-0x00000000043A0000-0x00000000043F8000-memory.dmp

                memory/4256-6-0x00000000043A0000-0x00000000043F8000-memory.dmp

                memory/5100-433-0x0000022A165D0000-0x0000022A1682F000-memory.dmp