Analysis
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max time kernel
105s -
max time network
141s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
13-07-2022 14:10
Static task
static1
Behavioral task
behavioral1
Sample
virussign.dll
Resource
win7-20220414-en
General
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Target
virussign.dll
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Size
844KB
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MD5
4fc335703cfb06c1c8e82b3faa80f8d0
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SHA1
07d6349c60aabca12c95d4417413881d2d2d72d9
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SHA256
81b64a354103b21b8d7f2bebb62923b5c2bc4f7f9cba5197fc24b5d869c032be
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SHA512
aca6e1720963628d3e24d2867b003d2b7dd64f4d8da2c9b029c5779544503b6e3a1ba632a1b60f041e9084b85414294ba226256aebabf3d5579cda4d2599ce08
Malware Config
Signatures
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ACProtect 1.3x - 1.4x DLL software 4 IoCs
Detects file using ACProtect software.
Processes:
resource yara_rule \Users\Admin\AppData\Local\Temp\ezkFB31.tmp acprotect C:\Users\Admin\AppData\Local\Temp\ezkFB31.tmp acprotect \Users\Admin\AppData\Local\Temp\ezkFB31.tmp acprotect \Users\Admin\AppData\Local\Temp\ezkFC2B.tmp acprotect -
Executes dropped EXE 2 IoCs
Processes:
rundll32Srv.exeDesktopLayer.exepid process 992 rundll32Srv.exe 1704 DesktopLayer.exe -
Processes:
resource yara_rule \Windows\SysWOW64\rundll32Srv.exe upx C:\Windows\SysWOW64\rundll32Srv.exe upx C:\Windows\SysWOW64\rundll32Srv.exe upx \Program Files (x86)\Microsoft\DesktopLayer.exe upx behavioral1/memory/992-66-0x0000000000400000-0x000000000042F000-memory.dmp upx C:\Program Files (x86)\Microsoft\DesktopLayer.exe upx C:\Program Files (x86)\Microsoft\DesktopLayer.exe upx behavioral1/memory/1704-72-0x0000000000400000-0x000000000042F000-memory.dmp upx behavioral1/memory/1312-74-0x0000000075100000-0x00000000751D5000-memory.dmp upx -
Loads dropped DLL 5 IoCs
Processes:
rundll32.exerundll32Srv.exeDesktopLayer.exepid process 1312 rundll32.exe 992 rundll32Srv.exe 1312 rundll32.exe 992 rundll32Srv.exe 1704 DesktopLayer.exe -
Drops file in System32 directory 1 IoCs
Processes:
rundll32.exedescription ioc process File created C:\Windows\SysWOW64\rundll32Srv.exe rundll32.exe -
Drops file in Program Files directory 3 IoCs
Processes:
rundll32Srv.exedescription ioc process File opened for modification C:\Program Files (x86)\Microsoft\pxFB71.tmp rundll32Srv.exe File created C:\Program Files (x86)\Microsoft\DesktopLayer.exe rundll32Srv.exe File opened for modification C:\Program Files (x86)\Microsoft\DesktopLayer.exe rundll32Srv.exe -
Processes:
iexplore.exeIEXPLORE.EXEdescription ioc process Key created \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\InternetRegistry iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{8130D271-02B5-11ED-8749-4224C87335A1} = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\LowRegistry iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000 iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\DomainSuggestion iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\GPU iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Toolbar iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Zoom iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "364486392" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\IETld\LowMic iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0" iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\IntelliForms iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Main iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\PageSetup iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Main\FullScreen = "no" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Main IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\ iexplore.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
DesktopLayer.exepid process 1704 DesktopLayer.exe 1704 DesktopLayer.exe 1704 DesktopLayer.exe 1704 DesktopLayer.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
Processes:
iexplore.exepid process 1700 iexplore.exe -
Suspicious use of SetWindowsHookEx 8 IoCs
Processes:
rundll32Srv.exeDesktopLayer.exeiexplore.exeIEXPLORE.EXEpid process 992 rundll32Srv.exe 1704 DesktopLayer.exe 1700 iexplore.exe 1700 iexplore.exe 1592 IEXPLORE.EXE 1592 IEXPLORE.EXE 1592 IEXPLORE.EXE 1592 IEXPLORE.EXE -
Suspicious use of WriteProcessMemory 23 IoCs
Processes:
rundll32.exerundll32.exerundll32Srv.exeDesktopLayer.exeiexplore.exedescription pid process target process PID 1280 wrote to memory of 1312 1280 rundll32.exe rundll32.exe PID 1280 wrote to memory of 1312 1280 rundll32.exe rundll32.exe PID 1280 wrote to memory of 1312 1280 rundll32.exe rundll32.exe PID 1280 wrote to memory of 1312 1280 rundll32.exe rundll32.exe PID 1280 wrote to memory of 1312 1280 rundll32.exe rundll32.exe PID 1280 wrote to memory of 1312 1280 rundll32.exe rundll32.exe PID 1280 wrote to memory of 1312 1280 rundll32.exe rundll32.exe PID 1312 wrote to memory of 992 1312 rundll32.exe rundll32Srv.exe PID 1312 wrote to memory of 992 1312 rundll32.exe rundll32Srv.exe PID 1312 wrote to memory of 992 1312 rundll32.exe rundll32Srv.exe PID 1312 wrote to memory of 992 1312 rundll32.exe rundll32Srv.exe PID 992 wrote to memory of 1704 992 rundll32Srv.exe DesktopLayer.exe PID 992 wrote to memory of 1704 992 rundll32Srv.exe DesktopLayer.exe PID 992 wrote to memory of 1704 992 rundll32Srv.exe DesktopLayer.exe PID 992 wrote to memory of 1704 992 rundll32Srv.exe DesktopLayer.exe PID 1704 wrote to memory of 1700 1704 DesktopLayer.exe iexplore.exe PID 1704 wrote to memory of 1700 1704 DesktopLayer.exe iexplore.exe PID 1704 wrote to memory of 1700 1704 DesktopLayer.exe iexplore.exe PID 1704 wrote to memory of 1700 1704 DesktopLayer.exe iexplore.exe PID 1700 wrote to memory of 1592 1700 iexplore.exe IEXPLORE.EXE PID 1700 wrote to memory of 1592 1700 iexplore.exe IEXPLORE.EXE PID 1700 wrote to memory of 1592 1700 iexplore.exe IEXPLORE.EXE PID 1700 wrote to memory of 1592 1700 iexplore.exe IEXPLORE.EXE
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\virussign.dll,#11⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\virussign.dll,#12⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32Srv.exeC:\Windows\SysWOW64\rundll32Srv.exe3⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Program Files (x86)\Microsoft\DesktopLayer.exe"C:\Program Files (x86)\Microsoft\DesktopLayer.exe"4⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Program Files\Internet Explorer\iexplore.exe"C:\Program Files\Internet Explorer\iexplore.exe"5⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1700 CREDAT:275457 /prefetch:26⤵
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Program Files (x86)\Microsoft\DesktopLayer.exeFilesize
228KB
MD5aca5487a29ce8985398fc80fde1b5655
SHA12ab36b6dfed1b33f29ed539f330c791e2644c504
SHA2564d8c5a2d56a1f781f0189f728b0230b54aefb2a7fa869e86d480eadd9c2aca59
SHA5125f0da8c5022da0ea06ee3793f79202f98b2d0ccbebc6ed11fb570231e37cf34a145900e27bf432bf410b8b8ddfe1774da0ad753232371fb7d1eb3f54a111ad4c
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C:\Program Files (x86)\Microsoft\DesktopLayer.exeFilesize
228KB
MD5aca5487a29ce8985398fc80fde1b5655
SHA12ab36b6dfed1b33f29ed539f330c791e2644c504
SHA2564d8c5a2d56a1f781f0189f728b0230b54aefb2a7fa869e86d480eadd9c2aca59
SHA5125f0da8c5022da0ea06ee3793f79202f98b2d0ccbebc6ed11fb570231e37cf34a145900e27bf432bf410b8b8ddfe1774da0ad753232371fb7d1eb3f54a111ad4c
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C:\Users\Admin\AppData\Local\Temp\ezkFB31.tmpFilesize
172KB
MD5685f1cbd4af30a1d0c25f252d399a666
SHA16a1b978f5e6150b88c8634146f1406ed97d2f134
SHA2560e478c95a7a07570a69e6061e7c1da9001bccad9cc454f2ed4da58824a13e0f4
SHA5126555ad6b4f4f26105ca8aad64501d74519a3e091f559b4b563d6ffb20a2ddfcde65e4fe94971a9bc65e86db577f2548ca00f9920d341c8ea808b04c0947d61d9
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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\GEO4SLAG.txtFilesize
602B
MD5c4be909777a6cc75106f5523ac38719a
SHA1da2051e9c940f1c6d1152582c663b3ec015f986c
SHA2566acde0dfb4475f5f19cfa46cfb378f4637c5cf8e938132e858d75193b6198bad
SHA51202f80ff25e183976c63b435d24e1fb3a0fa2d6a92fea8e6156979c254891e09a454216cfacbd9140c30379ab8ac67806a5d46b2e36a2bfca7723f4afe5840c43
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C:\Windows\SysWOW64\rundll32Srv.exeFilesize
228KB
MD5aca5487a29ce8985398fc80fde1b5655
SHA12ab36b6dfed1b33f29ed539f330c791e2644c504
SHA2564d8c5a2d56a1f781f0189f728b0230b54aefb2a7fa869e86d480eadd9c2aca59
SHA5125f0da8c5022da0ea06ee3793f79202f98b2d0ccbebc6ed11fb570231e37cf34a145900e27bf432bf410b8b8ddfe1774da0ad753232371fb7d1eb3f54a111ad4c
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C:\Windows\SysWOW64\rundll32Srv.exeFilesize
228KB
MD5aca5487a29ce8985398fc80fde1b5655
SHA12ab36b6dfed1b33f29ed539f330c791e2644c504
SHA2564d8c5a2d56a1f781f0189f728b0230b54aefb2a7fa869e86d480eadd9c2aca59
SHA5125f0da8c5022da0ea06ee3793f79202f98b2d0ccbebc6ed11fb570231e37cf34a145900e27bf432bf410b8b8ddfe1774da0ad753232371fb7d1eb3f54a111ad4c
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\Program Files (x86)\Microsoft\DesktopLayer.exeFilesize
228KB
MD5aca5487a29ce8985398fc80fde1b5655
SHA12ab36b6dfed1b33f29ed539f330c791e2644c504
SHA2564d8c5a2d56a1f781f0189f728b0230b54aefb2a7fa869e86d480eadd9c2aca59
SHA5125f0da8c5022da0ea06ee3793f79202f98b2d0ccbebc6ed11fb570231e37cf34a145900e27bf432bf410b8b8ddfe1774da0ad753232371fb7d1eb3f54a111ad4c
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\Users\Admin\AppData\Local\Temp\ezkFB31.tmpFilesize
172KB
MD5685f1cbd4af30a1d0c25f252d399a666
SHA16a1b978f5e6150b88c8634146f1406ed97d2f134
SHA2560e478c95a7a07570a69e6061e7c1da9001bccad9cc454f2ed4da58824a13e0f4
SHA5126555ad6b4f4f26105ca8aad64501d74519a3e091f559b4b563d6ffb20a2ddfcde65e4fe94971a9bc65e86db577f2548ca00f9920d341c8ea808b04c0947d61d9
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\Users\Admin\AppData\Local\Temp\ezkFB31.tmpFilesize
172KB
MD5685f1cbd4af30a1d0c25f252d399a666
SHA16a1b978f5e6150b88c8634146f1406ed97d2f134
SHA2560e478c95a7a07570a69e6061e7c1da9001bccad9cc454f2ed4da58824a13e0f4
SHA5126555ad6b4f4f26105ca8aad64501d74519a3e091f559b4b563d6ffb20a2ddfcde65e4fe94971a9bc65e86db577f2548ca00f9920d341c8ea808b04c0947d61d9
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\Users\Admin\AppData\Local\Temp\ezkFC2B.tmpFilesize
172KB
MD5685f1cbd4af30a1d0c25f252d399a666
SHA16a1b978f5e6150b88c8634146f1406ed97d2f134
SHA2560e478c95a7a07570a69e6061e7c1da9001bccad9cc454f2ed4da58824a13e0f4
SHA5126555ad6b4f4f26105ca8aad64501d74519a3e091f559b4b563d6ffb20a2ddfcde65e4fe94971a9bc65e86db577f2548ca00f9920d341c8ea808b04c0947d61d9
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\Windows\SysWOW64\rundll32Srv.exeFilesize
228KB
MD5aca5487a29ce8985398fc80fde1b5655
SHA12ab36b6dfed1b33f29ed539f330c791e2644c504
SHA2564d8c5a2d56a1f781f0189f728b0230b54aefb2a7fa869e86d480eadd9c2aca59
SHA5125f0da8c5022da0ea06ee3793f79202f98b2d0ccbebc6ed11fb570231e37cf34a145900e27bf432bf410b8b8ddfe1774da0ad753232371fb7d1eb3f54a111ad4c
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memory/992-66-0x0000000000400000-0x000000000042F000-memory.dmpFilesize
188KB
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memory/992-57-0x0000000000000000-mapping.dmp
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memory/992-69-0x0000000000230000-0x00000000002A3000-memory.dmpFilesize
460KB
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memory/1312-76-0x00000000001B0000-0x00000000001DF000-memory.dmpFilesize
188KB
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memory/1312-54-0x0000000000000000-mapping.dmp
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memory/1312-74-0x0000000075100000-0x00000000751D5000-memory.dmpFilesize
852KB
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memory/1312-75-0x0000000075020000-0x00000000750F5000-memory.dmpFilesize
852KB
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memory/1312-77-0x00000000002A0000-0x0000000000313000-memory.dmpFilesize
460KB
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memory/1312-78-0x0000000075100000-0x00000000751D5000-memory.dmpFilesize
852KB
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memory/1312-79-0x00000000001B0000-0x00000000001DF000-memory.dmpFilesize
188KB
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memory/1312-80-0x00000000001B0000-0x00000000001B6000-memory.dmpFilesize
24KB
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memory/1312-55-0x0000000076181000-0x0000000076183000-memory.dmpFilesize
8KB
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memory/1704-72-0x0000000000400000-0x000000000042F000-memory.dmpFilesize
188KB
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memory/1704-73-0x0000000001BC0000-0x0000000001C33000-memory.dmpFilesize
460KB
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memory/1704-65-0x0000000000000000-mapping.dmp