Analysis
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max time kernel
150s -
max time network
153s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
22-05-2022 18:13
Static task
static1
Behavioral task
behavioral1
Sample
иуеr.exe
Resource
win7-20220414-en
General
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Target
иуеr.exe
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Size
25KB
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MD5
ae72c198c0825712f203e258571c0e87
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SHA1
066ef64d5f5bb96e1714247c97aaf291907a7b3f
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SHA256
7237dd5e4e0c1f2bb79a3ede0919cddf1cac7f1095deb1070275ac4669691c65
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SHA512
a48c90badd2346df3e8f1cb1807b9f22177835aba52f2718ed8bc0c00fd4f5020958fe6e8b02c23c1c7380b68c96b1ad17dee51a536a0a26e4f98598354604a1
Malware Config
Extracted
njrat
Njrat 0.7 Golden By Hassan Amiri
gay
7.tcp.eu.ngrok.io:14345
Windows Update
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reg_key
Windows Update
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splitter
|Hassan|
Signatures
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suricata: ET MALWARE Generic njRAT/Bladabindi CnC Activity (ll)
suricata: ET MALWARE Generic njRAT/Bladabindi CnC Activity (ll)
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Executes dropped EXE 3 IoCs
Processes:
Dllhost.exeServer.exeServer.exepid process 1036 Dllhost.exe 1000 Server.exe 1488 Server.exe -
Drops startup file 2 IoCs
Processes:
Dllhost.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Java update.exe Dllhost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Java update.exe Dllhost.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
Dllhost.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows\CurrentVersion\Run\Windows Update = "\"C:\\Windows\\Dllhost.exe\" .." Dllhost.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Update = "\"C:\\Windows\\Dllhost.exe\" .." Dllhost.exe -
Drops file in Windows directory 2 IoCs
Processes:
иуеr.exeDllhost.exedescription ioc process File created C:\Windows\Dllhost.exe иуеr.exe File opened for modification C:\Windows\Dllhost.exe Dllhost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Modifies Internet Explorer Phishing Filter 1 TTPs 2 IoCs
Processes:
iexplore.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\PhishingFilter iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\PhishingFilter\ClientSupported_MigrationTime = b028bbbf186ed801 iexplore.exe -
Processes:
iexplore.exeIEXPLORE.EXEdescription ioc process Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\IntelliForms iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\InternetRegistry iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\LowRegistry iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\PageSetup iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\FullScreen = "no" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb01000000358f16e0538341458b70f68dad1eafd400000000020000000000106600000001000020000000b9675ad440665b987cfc326835389d54c1faa5032ac372d37605bd467817d201000000000e800000000200002000000081633cb0eb61246f660ca5ad1b885b1f92186bf1206a44c88e1222c1781c71b920000000d8c8ea0e8ca801ddc62842106154590d90dd2005c70d699f9240b36ea40e594f4000000047ee37b0f1a41c6cfa3f6e998b178417f0f02d621daf813ff64224caf24cea65ad34ecb23df64281289b90469a490ffc91dc7d78f822673cece823af627b87d5 iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\MINIE\TabBandWidth = "500" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running" iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000 iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = e04105d2186ed801 iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\MINIE iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\IETld\LowMic iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\MFV = 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 iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NTPFirstRun = "1" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Zoom iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{F84F4211-DA0B-11EC-AFA4-F2A7A8855ABA} = "0" iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\DownloadWindowPlacement = 2c0000000000000000000000ffffffffffffffffffffffffffffffff100100003d000000900300001d020000 iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\GPU iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Toolbar iexplore.exe -
Modifies registry class 1 IoCs
Processes:
rundll32.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000_Classes\Local Settings rundll32.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
Dllhost.exepid process 1036 Dllhost.exe -
Suspicious use of AdjustPrivilegeToken 19 IoCs
Processes:
Dllhost.exedescription pid process Token: SeDebugPrivilege 1036 Dllhost.exe Token: 33 1036 Dllhost.exe Token: SeIncBasePriorityPrivilege 1036 Dllhost.exe Token: 33 1036 Dllhost.exe Token: SeIncBasePriorityPrivilege 1036 Dllhost.exe Token: 33 1036 Dllhost.exe Token: SeIncBasePriorityPrivilege 1036 Dllhost.exe Token: 33 1036 Dllhost.exe Token: SeIncBasePriorityPrivilege 1036 Dllhost.exe Token: 33 1036 Dllhost.exe Token: SeIncBasePriorityPrivilege 1036 Dllhost.exe Token: 33 1036 Dllhost.exe Token: SeIncBasePriorityPrivilege 1036 Dllhost.exe Token: 33 1036 Dllhost.exe Token: SeIncBasePriorityPrivilege 1036 Dllhost.exe Token: 33 1036 Dllhost.exe Token: SeIncBasePriorityPrivilege 1036 Dllhost.exe Token: 33 1036 Dllhost.exe Token: SeIncBasePriorityPrivilege 1036 Dllhost.exe -
Suspicious use of FindShellTrayWindow 4 IoCs
Processes:
Dllhost.exeiexplore.exepid process 1036 Dllhost.exe 1036 Dllhost.exe 1552 iexplore.exe 1552 iexplore.exe -
Suspicious use of SetWindowsHookEx 4 IoCs
Processes:
iexplore.exeIEXPLORE.EXEpid process 1552 iexplore.exe 1552 iexplore.exe 1464 IEXPLORE.EXE 1464 IEXPLORE.EXE -
Suspicious use of WriteProcessMemory 22 IoCs
Processes:
иуеr.exeDllhost.exetaskeng.exeiexplore.exedescription pid process target process PID 1968 wrote to memory of 1036 1968 иуеr.exe Dllhost.exe PID 1968 wrote to memory of 1036 1968 иуеr.exe Dllhost.exe PID 1968 wrote to memory of 1036 1968 иуеr.exe Dllhost.exe PID 1036 wrote to memory of 956 1036 Dllhost.exe schtasks.exe PID 1036 wrote to memory of 956 1036 Dllhost.exe schtasks.exe PID 1036 wrote to memory of 956 1036 Dllhost.exe schtasks.exe PID 588 wrote to memory of 1000 588 taskeng.exe Server.exe PID 588 wrote to memory of 1000 588 taskeng.exe Server.exe PID 588 wrote to memory of 1000 588 taskeng.exe Server.exe PID 1036 wrote to memory of 1552 1036 Dllhost.exe iexplore.exe PID 1036 wrote to memory of 1552 1036 Dllhost.exe iexplore.exe PID 1036 wrote to memory of 1552 1036 Dllhost.exe iexplore.exe PID 1552 wrote to memory of 1464 1552 iexplore.exe IEXPLORE.EXE PID 1552 wrote to memory of 1464 1552 iexplore.exe IEXPLORE.EXE PID 1552 wrote to memory of 1464 1552 iexplore.exe IEXPLORE.EXE PID 1552 wrote to memory of 1464 1552 iexplore.exe IEXPLORE.EXE PID 588 wrote to memory of 1488 588 taskeng.exe Server.exe PID 588 wrote to memory of 1488 588 taskeng.exe Server.exe PID 588 wrote to memory of 1488 588 taskeng.exe Server.exe PID 1552 wrote to memory of 824 1552 iexplore.exe rundll32.exe PID 1552 wrote to memory of 824 1552 iexplore.exe rundll32.exe PID 1552 wrote to memory of 824 1552 iexplore.exe rundll32.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\иуеr.exe"C:\Users\Admin\AppData\Local\Temp\иуеr.exe"1⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
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C:\Windows\Dllhost.exe"C:\Windows\Dllhost.exe"2⤵
- Executes dropped EXE
- Drops startup file
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\schtasks.exeschtasks /create /sc minute /mo 1 /tn Server /tr C:\Users\Admin\AppData\Local\Temp/Server.exe3⤵
- Creates scheduled task(s)
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C:\Program Files\Internet Explorer\iexplore.exe"C:\Program Files\Internet Explorer\iexplore.exe" http://www.upload.ee/image/2298158/koli.swf3⤵
- Modifies Internet Explorer Phishing Filter
- 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:1552 CREDAT:275457 /prefetch:24⤵
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
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C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\LZXOIVA8\koli.swf4⤵
- Modifies registry class
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C:\Windows\system32\taskeng.exetaskeng.exe {92049ECA-31CB-47B1-9058-DA7D2C50B8BF} S-1-5-21-1083475884-596052423-1669053738-1000:WYZSGDWS\Admin:Interactive:[1]1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\Server.exeC:\Users\Admin\AppData\Local\Temp/Server.exe2⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\Server.exeC:\Users\Admin\AppData\Local\Temp/Server.exe2⤵
- Executes dropped EXE
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\LZXOIVA8\koli.swf.h71wbgj.partialFilesize
23KB
MD595678bc72a9371ec8c3dc953d05e1b70
SHA1e9a26d4ca6544b0397b48f719d158ca849bdcca6
SHA256c57e96f04b14e2cabddd4b4e4f77e730ce7ad7f4d3613719bff151cfff3b9154
SHA51281bde22a14c1aa375725c0b654d39feabd969ac73c7eeab000ae132ddeb3d62287b21d07edbbc12d3fc90c626a3c1669cc9499d15557a23be5d140de94bbeeb0
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C:\Users\Admin\AppData\Local\Temp\Server.exeFilesize
25KB
MD5ae72c198c0825712f203e258571c0e87
SHA1066ef64d5f5bb96e1714247c97aaf291907a7b3f
SHA2567237dd5e4e0c1f2bb79a3ede0919cddf1cac7f1095deb1070275ac4669691c65
SHA512a48c90badd2346df3e8f1cb1807b9f22177835aba52f2718ed8bc0c00fd4f5020958fe6e8b02c23c1c7380b68c96b1ad17dee51a536a0a26e4f98598354604a1
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C:\Users\Admin\AppData\Local\Temp\Server.exeFilesize
25KB
MD5ae72c198c0825712f203e258571c0e87
SHA1066ef64d5f5bb96e1714247c97aaf291907a7b3f
SHA2567237dd5e4e0c1f2bb79a3ede0919cddf1cac7f1095deb1070275ac4669691c65
SHA512a48c90badd2346df3e8f1cb1807b9f22177835aba52f2718ed8bc0c00fd4f5020958fe6e8b02c23c1c7380b68c96b1ad17dee51a536a0a26e4f98598354604a1
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C:\Users\Admin\AppData\Local\Temp\Server.exeFilesize
25KB
MD5ae72c198c0825712f203e258571c0e87
SHA1066ef64d5f5bb96e1714247c97aaf291907a7b3f
SHA2567237dd5e4e0c1f2bb79a3ede0919cddf1cac7f1095deb1070275ac4669691c65
SHA512a48c90badd2346df3e8f1cb1807b9f22177835aba52f2718ed8bc0c00fd4f5020958fe6e8b02c23c1c7380b68c96b1ad17dee51a536a0a26e4f98598354604a1
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C:\Windows\Dllhost.exeFilesize
25KB
MD5ae72c198c0825712f203e258571c0e87
SHA1066ef64d5f5bb96e1714247c97aaf291907a7b3f
SHA2567237dd5e4e0c1f2bb79a3ede0919cddf1cac7f1095deb1070275ac4669691c65
SHA512a48c90badd2346df3e8f1cb1807b9f22177835aba52f2718ed8bc0c00fd4f5020958fe6e8b02c23c1c7380b68c96b1ad17dee51a536a0a26e4f98598354604a1
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C:\Windows\Dllhost.exeFilesize
25KB
MD5ae72c198c0825712f203e258571c0e87
SHA1066ef64d5f5bb96e1714247c97aaf291907a7b3f
SHA2567237dd5e4e0c1f2bb79a3ede0919cddf1cac7f1095deb1070275ac4669691c65
SHA512a48c90badd2346df3e8f1cb1807b9f22177835aba52f2718ed8bc0c00fd4f5020958fe6e8b02c23c1c7380b68c96b1ad17dee51a536a0a26e4f98598354604a1
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memory/824-72-0x0000000000000000-mapping.dmp
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memory/956-62-0x0000000000000000-mapping.dmp
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memory/1000-64-0x0000000000000000-mapping.dmp
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memory/1000-67-0x00000000008D0000-0x00000000008D8000-memory.dmpFilesize
32KB
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memory/1036-60-0x00000000001B0000-0x00000000001B8000-memory.dmpFilesize
32KB
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memory/1036-61-0x00000000003D0000-0x00000000003E2000-memory.dmpFilesize
72KB
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memory/1036-63-0x0000000000600000-0x0000000000616000-memory.dmpFilesize
88KB
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memory/1036-57-0x0000000000000000-mapping.dmp
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memory/1488-68-0x0000000000000000-mapping.dmp
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memory/1488-70-0x0000000001290000-0x0000000001298000-memory.dmpFilesize
32KB
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memory/1968-56-0x000007FEFBD01000-0x000007FEFBD03000-memory.dmpFilesize
8KB
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memory/1968-55-0x00000000002E0000-0x00000000002F2000-memory.dmpFilesize
72KB
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memory/1968-54-0x0000000000EA0000-0x0000000000EA8000-memory.dmpFilesize
32KB