Analysis
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max time kernel
156s -
max time network
160s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220112 -
submitted
21-02-2022 23:10
Static task
static1
Behavioral task
behavioral1
Sample
NKP210102-NIT-SC2.exe
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
NKP210102-NIT-SC2.exe
Resource
win10v2004-en-20220112
General
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Target
NKP210102-NIT-SC2.exe
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Size
897KB
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MD5
65b5174a50b047604c2aed66369a4a88
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SHA1
853e75392f379c6d9f655c53c881c45287ab2f6b
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SHA256
8d8c5013933443f1f3e20db22a1abd56815cdd61b866f7953e032678f5e3d049
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SHA512
04e5a3e89538fc8a7b83773f52a9424da327f7fc2709e2f64f977056078e9bee87fc9ebd29619607a63b8844d084f093aa8da7d223eb97154bdb8137312b0d0e
Malware Config
Extracted
Protocol: smtp- Host:
mail.revistaeducar.com.ar - Port:
25 - Username:
[email protected] - Password:
somchai#3774
Extracted
matiex
Protocol: smtp- Host:
mail.revistaeducar.com.ar - Port:
25 - Username:
[email protected] - Password:
somchai#3774
Signatures
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Matiex Main Payload 1 IoCs
Processes:
resource yara_rule behavioral2/memory/3936-137-0x0000000000400000-0x0000000000474000-memory.dmp family_matiex -
Drops startup file 1 IoCs
Processes:
RegSvcs.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\.url RegSvcs.exe -
Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
Processes:
RegSvcs.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe Key opened \REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe Key opened \REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe -
Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 57 checkip.dyndns.org 61 freegeoip.app 62 freegeoip.app -
Suspicious use of SetThreadContext 1 IoCs
Processes:
NKP210102-NIT-SC2.exedescription pid process target process PID 2728 set thread context of 3936 2728 NKP210102-NIT-SC2.exe RegSvcs.exe -
Drops file in Windows directory 3 IoCs
Processes:
svchost.exeTiWorker.exedescription ioc process File opened for modification C:\Windows\ServiceProfiles\NetworkService\AppData\Local\Microsoft\Windows\DeliveryOptimization\State\keyValueLKG.dat svchost.exe File opened for modification C:\Windows\Logs\CBS\CBS.log TiWorker.exe File opened for modification C:\Windows\WinSxS\pending.xml TiWorker.exe -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
MusNotifyIcon.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz MusNotifyIcon.exe Key opened \Registry\Machine\HARDWARE\DESCRIPTION\System\CentralProcessor\0 MusNotifyIcon.exe -
Modifies data under HKEY_USERS 56 IoCs
Processes:
svchost.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "6.667418" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "4116" svchost.exe Set value (str) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\GeoVersion_EndpointFullUri = "https://geover.prod.do.dsp.mp.microsoft.com/geoversion" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CDNConnectionCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MonthID = "2" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CacheSizeBytes = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\PriorityDownloadCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateFrBps = "0" svchost.exe Key created \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Settings svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyInternetBytes = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\BkDownloadRatePct = "45" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateBkCnt = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "4184" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "3952" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateBkBps = "1157726" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UplinkBps = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateFrCnt = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateBkCnt = "4" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\NormalDownloadPendingCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyCdnBytes = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\DownloadMode_BackCompat = "1" svchost.exe Key created \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UplinkUsageBps = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\FrDownloadRatePct = "90" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UploadMonthlyLanBytes = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\InternetConnectionCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UploadMonthlyInternetBytes = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\PriorityDownloadPendingCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownlinkBps = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\LANConnectionCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\GroupConnectionCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyGroupBytes = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\SwarmCount = "0" svchost.exe Set value (str) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "0.000000" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyLinkLocalBytes = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyCacheHostBytes = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\NormalDownloadCount = "0" svchost.exe Key created \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UploadCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\LinkLocalConnectionCount = "0" svchost.exe Set value (str) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "6.247481" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\KVFileExpirationTime = "132901350613687098" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\SwarmCount = "1" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownlinkUsageBps = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UploadRatePct = "100" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "4332" svchost.exe Key created \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\DODownloadMode = "1" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyCdnBytes = "90228624" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\PeerInfoCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MonthlyUploadRestriction = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateBkBps = "0" svchost.exe Set value (str) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\Geo_EndpointFullUri = "https://geo.prod.do.dsp.mp.microsoft.com/geo" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyLanBytes = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MonthID = "1" svchost.exe Set value (str) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "8.889219" svchost.exe -
Suspicious behavior: EnumeratesProcesses 1 IoCs
Processes:
RegSvcs.exepid process 3936 RegSvcs.exe -
Suspicious use of AdjustPrivilegeToken 64 IoCs
Processes:
TiWorker.exedescription pid process Token: SeSecurityPrivilege 1688 TiWorker.exe Token: SeRestorePrivilege 1688 TiWorker.exe Token: SeBackupPrivilege 1688 TiWorker.exe Token: SeBackupPrivilege 1688 TiWorker.exe Token: SeRestorePrivilege 1688 TiWorker.exe Token: SeSecurityPrivilege 1688 TiWorker.exe Token: SeBackupPrivilege 1688 TiWorker.exe Token: SeRestorePrivilege 1688 TiWorker.exe Token: SeSecurityPrivilege 1688 TiWorker.exe Token: SeBackupPrivilege 1688 TiWorker.exe Token: SeRestorePrivilege 1688 TiWorker.exe Token: SeSecurityPrivilege 1688 TiWorker.exe Token: SeBackupPrivilege 1688 TiWorker.exe Token: SeRestorePrivilege 1688 TiWorker.exe Token: SeSecurityPrivilege 1688 TiWorker.exe Token: SeBackupPrivilege 1688 TiWorker.exe Token: SeRestorePrivilege 1688 TiWorker.exe Token: SeSecurityPrivilege 1688 TiWorker.exe Token: SeBackupPrivilege 1688 TiWorker.exe Token: SeRestorePrivilege 1688 TiWorker.exe Token: SeSecurityPrivilege 1688 TiWorker.exe Token: SeBackupPrivilege 1688 TiWorker.exe Token: SeRestorePrivilege 1688 TiWorker.exe Token: SeSecurityPrivilege 1688 TiWorker.exe Token: SeBackupPrivilege 1688 TiWorker.exe Token: SeRestorePrivilege 1688 TiWorker.exe Token: SeSecurityPrivilege 1688 TiWorker.exe Token: SeBackupPrivilege 1688 TiWorker.exe Token: SeRestorePrivilege 1688 TiWorker.exe Token: SeSecurityPrivilege 1688 TiWorker.exe Token: SeBackupPrivilege 1688 TiWorker.exe Token: SeRestorePrivilege 1688 TiWorker.exe Token: SeSecurityPrivilege 1688 TiWorker.exe Token: SeBackupPrivilege 1688 TiWorker.exe Token: SeRestorePrivilege 1688 TiWorker.exe Token: SeSecurityPrivilege 1688 TiWorker.exe Token: SeBackupPrivilege 1688 TiWorker.exe Token: SeRestorePrivilege 1688 TiWorker.exe Token: SeSecurityPrivilege 1688 TiWorker.exe Token: SeBackupPrivilege 1688 TiWorker.exe Token: SeRestorePrivilege 1688 TiWorker.exe Token: SeSecurityPrivilege 1688 TiWorker.exe Token: SeBackupPrivilege 1688 TiWorker.exe Token: SeRestorePrivilege 1688 TiWorker.exe Token: SeSecurityPrivilege 1688 TiWorker.exe Token: SeBackupPrivilege 1688 TiWorker.exe Token: SeRestorePrivilege 1688 TiWorker.exe Token: SeSecurityPrivilege 1688 TiWorker.exe Token: SeBackupPrivilege 1688 TiWorker.exe Token: SeRestorePrivilege 1688 TiWorker.exe Token: SeSecurityPrivilege 1688 TiWorker.exe Token: SeBackupPrivilege 1688 TiWorker.exe Token: SeRestorePrivilege 1688 TiWorker.exe Token: SeSecurityPrivilege 1688 TiWorker.exe Token: SeBackupPrivilege 1688 TiWorker.exe Token: SeRestorePrivilege 1688 TiWorker.exe Token: SeSecurityPrivilege 1688 TiWorker.exe Token: SeBackupPrivilege 1688 TiWorker.exe Token: SeRestorePrivilege 1688 TiWorker.exe Token: SeSecurityPrivilege 1688 TiWorker.exe Token: SeBackupPrivilege 1688 TiWorker.exe Token: SeRestorePrivilege 1688 TiWorker.exe Token: SeSecurityPrivilege 1688 TiWorker.exe Token: SeBackupPrivilege 1688 TiWorker.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
RegSvcs.exepid process 3936 RegSvcs.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
NKP210102-NIT-SC2.exedescription pid process target process PID 2728 wrote to memory of 3936 2728 NKP210102-NIT-SC2.exe RegSvcs.exe PID 2728 wrote to memory of 3936 2728 NKP210102-NIT-SC2.exe RegSvcs.exe PID 2728 wrote to memory of 3936 2728 NKP210102-NIT-SC2.exe RegSvcs.exe PID 2728 wrote to memory of 3936 2728 NKP210102-NIT-SC2.exe RegSvcs.exe PID 2728 wrote to memory of 3936 2728 NKP210102-NIT-SC2.exe RegSvcs.exe PID 2728 wrote to memory of 3936 2728 NKP210102-NIT-SC2.exe RegSvcs.exe PID 2728 wrote to memory of 3936 2728 NKP210102-NIT-SC2.exe RegSvcs.exe PID 2728 wrote to memory of 3936 2728 NKP210102-NIT-SC2.exe RegSvcs.exe -
outlook_office_path 1 IoCs
Processes:
RegSvcs.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe -
outlook_win_path 1 IoCs
Processes:
RegSvcs.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\NKP210102-NIT-SC2.exe"C:\Users\Admin\AppData\Local\Temp\NKP210102-NIT-SC2.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2728 -
C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"{path}"2⤵
- Drops startup file
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
PID:3936
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k NetworkService -p1⤵
- Drops file in Windows directory
- Modifies data under HKEY_USERS
PID:2980
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C:\Windows\system32\MusNotifyIcon.exe%systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 131⤵
- Checks processor information in registry
PID:3188
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C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exeC:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe -Embedding1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:1688
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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memory/2728-130-0x000000007499E000-0x000000007499F000-memory.dmpFilesize
4KB
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memory/2728-131-0x0000000000A60000-0x0000000000B46000-memory.dmpFilesize
920KB
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memory/2728-132-0x0000000005AA0000-0x0000000006044000-memory.dmpFilesize
5.6MB
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memory/2728-133-0x00000000054F0000-0x0000000005582000-memory.dmpFilesize
584KB
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memory/2728-134-0x00000000056F0000-0x00000000056F1000-memory.dmpFilesize
4KB
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memory/2728-135-0x0000000005680000-0x000000000568A000-memory.dmpFilesize
40KB
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memory/2728-136-0x0000000007550000-0x00000000075EC000-memory.dmpFilesize
624KB
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memory/3936-137-0x0000000000400000-0x0000000000474000-memory.dmpFilesize
464KB
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memory/3936-138-0x00000000056D0000-0x0000000005736000-memory.dmpFilesize
408KB
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memory/3936-139-0x000000007499E000-0x000000007499F000-memory.dmpFilesize
4KB
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memory/3936-140-0x00000000058A0000-0x00000000058A1000-memory.dmpFilesize
4KB
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memory/3936-141-0x0000000007320000-0x00000000074E2000-memory.dmpFilesize
1.8MB