Analysis

  • max time kernel
    152s
  • max time network
    163s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/01/2024, 16:08

General

  • Target
    CCleaner.exe
  • Size 69.8MB
  • Sample240122-tk8qdaadcj
  • SHA256 23eda7958cd22e11d5daa39d5a82e5740512c9435a138214b98d1925520bf8e8
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • RuRAT

    RuRAT is a remote admin tool sold as legitimate software but regularly abused in malicious phishing campaigns.

  • Checks computer location settings 2 TTPs 5 IoCs

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

  • Executes dropped EXE 10 IoCs
  • Loads dropped DLL 13 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Blocklisted process makes network request 1 IoCs
  • Checks for any installed AV software in registry 1 TTPs 3 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Enumerates connected drives 3 TTPs 23 IoCs

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

  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Checks system information in the registry 2 TTPs 2 IoCs

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

  • Drops file in System32 directory 8 IoCs
  • Drops file in Program Files directory 55 IoCs
  • Drops file in Windows directory 21 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 10 IoCs

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

  • Modifies data under HKEY_USERS 48 IoCs
  • Modifies registry class 24 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of SetWindowsHookEx 22 IoCs
  • Suspicious use of WriteProcessMemory 31 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:\Users\Admin\AppData\Local\Temp\CCleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\CCleaner.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4908
    • C:\Windows\System32\msiexec.exe
      "C:\Windows\System32\msiexec.exe" /i install.msi /qn
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:804
    • C:\Users\Admin\AppData\Local\Temp\CCleaner64.exe
      "C:\Users\Admin\AppData\Local\Temp\CCleaner64.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Loads dropped DLL
      • Checks for any installed AV software in registry
      • Writes to the Master Boot Record (MBR)
      • Checks system information in the registry
      • Drops file in Windows directory
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:2296
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Blocklisted process makes network request
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4668
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 922820A646E9AF425D6BBA8AC9D4368B
      2⤵
      • Loads dropped DLL
      PID:3260
    • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
      "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe" -msi_copy "C:\Users\Admin\AppData\Local\Temp\install.msi"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      PID:4672
    • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
      "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" /silentinstall
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      PID:4620
    • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
      "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" /firewall
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      PID:2124
    • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
      "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" /start
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      PID:996
  • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
    "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" -service
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • Drops file in System32 directory
    • Modifies data under HKEY_USERS
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:920
    • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
      "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:4232
      • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
        "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe" /tray
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        PID:4284
    • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
      "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe" /tray
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:4648
    • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
      "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" -firewall
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Modifies data under HKEY_USERS
      • Suspicious use of SetWindowsHookEx
      PID:2116

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        e57e3eb.rbs

        • Path C:\Config.Msi\e57e3eb.rbs
        • Size 41KB
        • SHA256 ee212b0b4345887b56787755b0de4ad0e6b32260b60632142d35e83f4f48d191
        • MD5 SHA1 SHA512 SSDEEP

        eventmsg.dll

        • Path C:\Program Files (x86)\Remote Utilities - Host\eventmsg.dll
        • Size 52KB
        • SHA256 44917b2c260fea3a0f4691f6e986c25e31b3f9ff22dcd055526199b4d8a54051
        • MD5 SHA1 SHA512 SSDEEP

        libeay32.dll

        • Path C:\Program Files (x86)\Remote Utilities - Host\libeay32.dll
        • Size 1.1MB
        • SHA256 5e2fd7678734be5516338a51ac409fe6981857ea143be7a855951bad5812f5d8
        • MD5 SHA1 SHA512 SSDEEP

        libeay32.dll

        • Path C:\Program Files (x86)\Remote Utilities - Host\libeay32.dll
        • Size 1.3MB
        • SHA256 26b24dcd9cb7ab8761ae7fb597704f81e2a6ede6572a247c39a969960dbba539
        • MD5 SHA1 SHA512 SSDEEP

        rfusclient.exe

        • Path C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
        • Size 10.4MB
        • SHA256 0c89262a283c80121ba1176345b230d0ade61cfcf682b92e555a48206fb4074a
        • MD5 SHA1 SHA512 SSDEEP

        rfusclient.exe

        • Path C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
        • Size 832KB
        • SHA256 3b45df09b3f40dc392b65b89dae4ccc24f1dc6c6e633d5045b86df2b27de3b37
        • MD5 SHA1 SHA512 SSDEEP

        rfusclient.exe

        • Path C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
        • Size 4.1MB
        • SHA256 9523588d645554be9bc3adfa6783fd7aa8c35a1b7d781cb17510d94ebd7c7b49
        • MD5 SHA1 SHA512 SSDEEP

        rutserv.exe

        • Path C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
        • Size 6.6MB
        • SHA256 7e91da467d8b86951f87f1d607dec98ce6e7a11c4b9ad697721f9afe65789762
        • MD5 SHA1 SHA512 SSDEEP

        rutserv.exe

        • Path C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
        • Size 7.4MB
        • SHA256 ac287dfa157031bc495782453611d31e06cab48746b05cd7ac61ab0f25038d26
        • MD5 SHA1 SHA512 SSDEEP

        rutserv.exe

        • Path C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
        • Size 320KB
        • SHA256 edfd5a825a6eea09cb49616d8b302379a77adcd5f3e7a5d2f02c3dc83f46eb5c
        • MD5 SHA1 SHA512 SSDEEP

        rutserv.exe

        • Path C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
        • Size 2.3MB
        • SHA256 2a9b25d978c45bbabbcf3b13bf3e486c17750a7188d4193c97de72c7e4226379
        • MD5 SHA1 SHA512 SSDEEP

        rutserv.exe

        • Path C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
        • Size 1.8MB
        • SHA256 91b30d275a4b02861ffad956ab88ed86c39e6890e10984f23d90321e73fa354d
        • MD5 SHA1 SHA512 SSDEEP

        rutserv.exe

        • Path C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
        • Size 9.6MB
        • SHA256 e4767229e1d5be1f695a15404dbc7c6052f74d4aea5592d27ef8704330bb11df
        • MD5 SHA1 SHA512 SSDEEP

        ssleay32.dll

        • Path C:\Program Files (x86)\Remote Utilities - Host\ssleay32.dll
        • Size 338KB
        • SHA256 d6e8bee1a9476ed3be229f4be81cc1154f1ed425e50e74fd1abcd76c56ea062c
        • MD5 SHA1 SHA512 SSDEEP

        vp8decoder.dll

        • Path C:\Program Files (x86)\Remote Utilities - Host\vp8decoder.dll
        • Size 380KB
        • SHA256 53b040341ce80f246c8437a99df5252a48801e2154eb94dc50af54a75d8d85ac
        • MD5 SHA1 SHA512 SSDEEP

        vp8encoder.dll

        • Path C:\Program Files (x86)\Remote Utilities - Host\vp8encoder.dll
        • Size 1.6MB
        • SHA256 b7eed374cf6970a7d83f19fc97bbf0effdc0841fdf5a03d154993d17aa52b2a2
        • MD5 SHA1 SHA512 SSDEEP

        webmmux.dll

        • Path C:\Program Files (x86)\Remote Utilities - Host\webmmux.dll
        • Size 260KB
        • SHA256 a64a113955ec0d89ae6ff357f9bb1063c7dd29fe5610ee516a94ac17b11172c2
        • MD5 SHA1 SHA512 SSDEEP

        webmvorbisdecoder.dll

        • Path C:\Program Files (x86)\Remote Utilities - Host\webmvorbisdecoder.dll
        • Size 365KB
        • SHA256 e6c04dc8359b2c76f765fce37ec123d33acbc5ce93e60022ba88eb7c867ac3f6
        • MD5 SHA1 SHA512 SSDEEP

        webmvorbisencoder.dll

        • Path C:\Program Files (x86)\Remote Utilities - Host\webmvorbisencoder.dll
        • Size 860KB
        • SHA256 8b1f95d7c0fdf25a6278347afda2f5ac4c86045c7fc530a330be885d8a87ea68
        • MD5 SHA1 SHA512 SSDEEP

        install.log

        • Path C:\ProgramData\Remote Utilities\install.log
        • Size 333B
        • SHA256 9f70c8f3625d395c154bf2adfbf841f2c79a1015e5570823ba033021e83d8778
        • MD5 SHA1 SHA512

        V01.log

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\WebCache\V01.log
        • Size 512KB
        • SHA256 b2b2984922f8af58bc4b44fd5117c53e13fc706238bd82ac25c0b40a52992de8
        • MD5 SHA1 SHA512 SSDEEP

        WebCacheV01.dat

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\WebCache\WebCacheV01.dat
        • Size 1.9MB
        • SHA256 bfcb821156a8f146378d408323641b5d2fc617574cabc5b8138fe2885ed6ed2b
        • MD5 SHA1 SHA512 SSDEEP

        WebCacheV01.jfm

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\WebCache\WebCacheV01.jfm
        • Size 16KB
        • SHA256 05116fd6b90d4122df75afdcfac8b4e095dfa30e33c4c7fa7f11dadd65a576be
        • MD5 SHA1 SHA512 SSDEEP

        CCleaner64.exe

        • Path C:\Users\Admin\AppData\Local\Temp\CCleaner64.exe
        • Size 30.7MB
        • SHA256 eb5dcf2c099421aa07ddc024458868e16d377ac496b67a860d14910aae4015b9
        • MD5 SHA1 SHA512 SSDEEP

        CCleaner64.exe

        • Path C:\Users\Admin\AppData\Local\Temp\CCleaner64.exe
        • Size 6.3MB
        • SHA256 89e847103a92bfd932ceac22eb1caea70e931ff8311d8236063a3825908a1f5b
        • MD5 SHA1 SHA512 SSDEEP

        CCleaner64.exe

        • Path C:\Users\Admin\AppData\Local\Temp\CCleaner64.exe
        • Size 5.8MB
        • SHA256 715dbbfea641ef4b52f6739cb5b76950545b7d1da3bad67a9341e1bf64fcdd39
        • MD5 SHA1 SHA512 SSDEEP

        ccleaner.ini

        • Path C:\Users\Admin\AppData\Local\Temp\ccleaner.ini
        • Size 83B
        • SHA256 5c5058ac6f4bd1853a6b1993ae01d5973a0b75ce73649fda09ac1ca7c055bd54
        • MD5 SHA1 SHA512

        ccleaner.ini

        • Path C:\Users\Admin\AppData\Local\Temp\ccleaner.ini
        • Size 103B
        • SHA256 236b35bb7910c9c286f53aa81658ce0af5ecae0e0103e9a16b4516e73d1a6f40
        • MD5 SHA1 SHA512

        ccleaner.ini

        • Path C:\Users\Admin\AppData\Local\Temp\ccleaner.ini
        • Size 153B
        • SHA256 e72effe2998186e68526c68e1182968d2bf69f1e4c39548a7e234bc4309ab9ed
        • MD5 SHA1 SHA512

        ccleaner.ini

        • Path C:\Users\Admin\AppData\Local\Temp\ccleaner.ini
        • Size 202B
        • SHA256 1ea5ee12188c7a5a152e754235d97585dca7ad7106d368055a8827bf46d06552
        • MD5 SHA1 SHA512

        ccleaner.ini

        • Path C:\Users\Admin\AppData\Local\Temp\ccleaner.ini
        • Size 311B
        • SHA256 a4a99213c2c35142b6445e99bdbee9272957f38001b185fdd44e739d381c18f5
        • MD5 SHA1 SHA512

        ccleaner.ini

        • Path C:\Users\Admin\AppData\Local\Temp\ccleaner.ini
        • Size 350B
        • SHA256 8db4a24f9f041613a83d2cd341a2c93d83ad9a26825bc71047c158f6abe944ba
        • MD5 SHA1 SHA512

        ccleaner.ini

        • Path C:\Users\Admin\AppData\Local\Temp\ccleaner.ini
        • Size 441B
        • SHA256 90368a0f3a954bdc45113343151ace073d86b34cf9bb6e691271c584d28df010
        • MD5 SHA1 SHA512

        gcapi_17059397902296.dll

        • Path C:\Users\Admin\AppData\Local\Temp\gcapi_17059397902296.dll
        • Size 740KB
        • SHA256 8b6ce3a640e2d6f36b0001be2a1abb765ae51e62c314a15911e75138cbb544bb
        • MD5 SHA1 SHA512 SSDEEP

        install.msi

        • Path C:\Users\Admin\AppData\Local\Temp\install.msi
        • Size 21.6MB
        • SHA256 06956bb4eee98f34f035af11666459b2f9fc5f7485b2cf16f6afb17bfa15a061
        • MD5 SHA1 SHA512 SSDEEP

        CCleanerDU.dll

        • Path C:\Users\Admin\AppData\Local\Temp\x64\CCleanerDU.dll
        • Size 8.4MB
        • SHA256 8489aa34aad93bcc011f8046c7a49ae6bc481eba4cb81624d663a513eaba3cd3
        • MD5 SHA1 SHA512 SSDEEP

        MSIED0F.tmp

        • Path C:\Windows\Installer\MSIED0F.tmp
        • Size 165KB
        • SHA256 1f6f0d9f136bc170cfbc48a1015113947087ac27aed1e3e91673ffc91b9f390b
        • MD5 SHA1 SHA512 SSDEEP

        memory/920-642-0x00000000065E0000-0x00000000065E1000-memory.dmp

        memory/920-713-0x0000000004060000-0x0000000004061000-memory.dmp

        memory/920-646-0x0000000007490000-0x0000000007491000-memory.dmp

        memory/920-572-0x0000000005710000-0x0000000005711000-memory.dmp

        memory/920-706-0x0000000006280000-0x0000000006281000-memory.dmp

        memory/920-643-0x0000000006630000-0x0000000006631000-memory.dmp

        memory/920-556-0x0000000005500000-0x0000000005501000-memory.dmp

        memory/920-708-0x0000000006310000-0x0000000006311000-memory.dmp

        memory/920-546-0x0000000005520000-0x0000000005521000-memory.dmp

        memory/920-539-0x00000000052F0000-0x00000000052F1000-memory.dmp

        memory/920-640-0x0000000006510000-0x0000000006511000-memory.dmp

        memory/920-569-0x0000000005700000-0x0000000005701000-memory.dmp

        memory/920-540-0x0000000005380000-0x0000000005381000-memory.dmp

        memory/920-543-0x0000000005390000-0x0000000005391000-memory.dmp

        memory/920-752-0x00000000063A0000-0x00000000063A1000-memory.dmp

        memory/920-644-0x0000000007200000-0x0000000007201000-memory.dmp

        memory/920-636-0x0000000006A00000-0x0000000006A01000-memory.dmp

        memory/920-639-0x0000000006B50000-0x0000000006B51000-memory.dmp

        memory/920-525-0x0000000004060000-0x0000000004061000-memory.dmp

        memory/920-635-0x0000000005730000-0x0000000005731000-memory.dmp

        memory/996-497-0x00000000020E0000-0x00000000020E1000-memory.dmp

        memory/996-645-0x0000000000540000-0x0000000001A30000-memory.dmp

        memory/2116-747-0x0000000000540000-0x0000000001A30000-memory.dmp

        memory/2116-761-0x0000000000540000-0x0000000001A30000-memory.dmp

        memory/2116-744-0x0000000000540000-0x0000000001A30000-memory.dmp

        memory/2116-742-0x0000000003EA0000-0x0000000003EA1000-memory.dmp

        memory/2124-454-0x0000000000540000-0x0000000001A30000-memory.dmp

        memory/2124-423-0x0000000002180000-0x0000000002181000-memory.dmp

        memory/2124-440-0x0000000000540000-0x0000000001A30000-memory.dmp

        memory/2296-439-0x0000017F8EC30000-0x0000017F8EC31000-memory.dmp

        memory/2296-455-0x0000017F8ED60000-0x0000017F8ED68000-memory.dmp

        memory/2296-177-0x00007FFD16120000-0x00007FFD16121000-memory.dmp

        memory/2296-178-0x00007FFD16130000-0x00007FFD16131000-memory.dmp

        memory/2296-179-0x00007FFD16180000-0x00007FFD16181000-memory.dmp

        memory/2296-180-0x00007FFD16140000-0x00007FFD16141000-memory.dmp

        memory/2296-190-0x00007FFD161B0000-0x00007FFD161B1000-memory.dmp

        memory/2296-191-0x00007FFD16150000-0x00007FFD16151000-memory.dmp

        memory/2296-193-0x00007FFD15460000-0x00007FFD15461000-memory.dmp

        memory/2296-462-0x0000017F8EC30000-0x0000017F8EC31000-memory.dmp

        memory/2296-458-0x0000017F8EC70000-0x0000017F8EC71000-memory.dmp

        memory/2296-430-0x0000017F8EC80000-0x0000017F8EC88000-memory.dmp

        memory/2296-452-0x0000017F8ED20000-0x0000017F8ED28000-memory.dmp

        memory/2296-436-0x0000017F8EC70000-0x0000017F8EC78000-memory.dmp

        memory/2296-433-0x0000017F8EC80000-0x0000017F8EC88000-memory.dmp

        memory/2296-398-0x0000017F86700000-0x0000017F86710000-memory.dmp

        memory/2296-431-0x0000017F8EC70000-0x0000017F8EC71000-memory.dmp

        memory/2296-405-0x0000017F86760000-0x0000017F86770000-memory.dmp

        memory/2296-427-0x0000017F8EDA0000-0x0000017F8EDA8000-memory.dmp

        memory/2296-175-0x00007FFD16110000-0x00007FFD16111000-memory.dmp

        memory/2296-429-0x0000017F8EDD0000-0x0000017F8EDD8000-memory.dmp

        memory/4232-653-0x00000000050D0000-0x00000000050D1000-memory.dmp

        memory/4232-652-0x00000000049B0000-0x00000000049B1000-memory.dmp

        memory/4232-648-0x0000000001660000-0x0000000001661000-memory.dmp

        memory/4232-649-0x0000000004960000-0x0000000004961000-memory.dmp

        memory/4284-714-0x0000000000210000-0x0000000000D2D000-memory.dmp

        memory/4284-728-0x0000000000210000-0x0000000000D2D000-memory.dmp

        memory/4620-399-0x0000000000540000-0x0000000001A30000-memory.dmp

        memory/4620-311-0x00000000055D0000-0x00000000055D1000-memory.dmp

        memory/4648-707-0x00000000068F0000-0x00000000068F1000-memory.dmp

        memory/4648-658-0x00000000049E0000-0x00000000049E1000-memory.dmp

        memory/4648-717-0x0000000003500000-0x0000000003501000-memory.dmp

        memory/4648-659-0x0000000004A40000-0x0000000004A41000-memory.dmp

        memory/4648-647-0x0000000003500000-0x0000000003501000-memory.dmp

        memory/4672-287-0x00000000035D0000-0x00000000035D1000-memory.dmp

        memory/4672-289-0x0000000000210000-0x0000000000D2D000-memory.dmp

        memory/4672-291-0x0000000000210000-0x0000000000D2D000-memory.dmp