Resubmissions
23-05-2023 08:29
230523-kdl4csfd51 1022-05-2023 02:20
230522-csp5kade76 1022-05-2023 01:46
230522-b6968agc4z 10Analysis
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max time kernel
414s -
max time network
417s -
platform
windows7_x64 -
resource
win7-20230220-en -
resource tags
arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system -
submitted
23-05-2023 08:29
Static task
static1
Behavioral task
behavioral1
Sample
3a2b0d7aa2a94d6d537838a2a18fa25890c2df97c7708e895f7c566f7a65ab76.exe
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
3a2b0d7aa2a94d6d537838a2a18fa25890c2df97c7708e895f7c566f7a65ab76.exe
Resource
win10v2004-20230220-en
General
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Target
3a2b0d7aa2a94d6d537838a2a18fa25890c2df97c7708e895f7c566f7a65ab76.exe
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Size
1.1MB
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MD5
d6cf5f8289eac27c551334578e6e4d9f
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SHA1
25f581c79b08f85ffe729bfec35fdc1ba6ef0add
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SHA256
3a2b0d7aa2a94d6d537838a2a18fa25890c2df97c7708e895f7c566f7a65ab76
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SHA512
258c276fe07b76e1dd1fea7ad1edef73fe95942ed912b91ef1bae70a8a600f5cdce28ced0d4e124f29068ec51adc2c92dad8455481ce9f55b138e3a8d96d13f9
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SSDEEP
24576:CDmzI+4jJk5xYsx+1itfzYpjJU1P2UjStlezy:COIfaxLx+EEC2UVz
Malware Config
Extracted
C:\Users\Admin\Downloads\readme.txt
@grwxzbny42fnyku4s@proton.me
Signatures
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Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
Processes:
bcdedit.exebcdedit.exepid process 1644 bcdedit.exe 956 bcdedit.exe -
Renames multiple (202) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Processes:
wbadmin.exepid process 1392 wbadmin.exe -
Modifies extensions of user files 6 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
svchost.exedescription ioc process File renamed C:\Users\Admin\Pictures\ReceiveRename.png => C:\Users\Admin\Pictures\ReceiveRename.png.Alphaware svchost.exe File renamed C:\Users\Admin\Pictures\SuspendGrant.raw => C:\Users\Admin\Pictures\SuspendGrant.raw.Alphaware svchost.exe File renamed C:\Users\Admin\Pictures\SyncLimit.png => C:\Users\Admin\Pictures\SyncLimit.png.Alphaware svchost.exe File renamed C:\Users\Admin\Pictures\TestSkip.tif => C:\Users\Admin\Pictures\TestSkip.tif.Alphaware svchost.exe File renamed C:\Users\Admin\Pictures\EnableClose.raw => C:\Users\Admin\Pictures\EnableClose.raw.Alphaware svchost.exe File renamed C:\Users\Admin\Pictures\ExitClose.png => C:\Users\Admin\Pictures\ExitClose.png.Alphaware svchost.exe -
Drops startup file 3 IoCs
Processes:
svchost.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini svchost.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\readme.txt svchost.exe -
Executes dropped EXE 1 IoCs
Processes:
svchost.exepid process 888 svchost.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Drops desktop.ini file(s) 33 IoCs
Processes:
svchost.exedescription ioc process File opened for modification C:\Users\Admin\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links for United States\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\Sample Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\Sample Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\Sample Music\desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 2 IoCs
Processes:
svchost.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\lk6t32sm7.jpg" svchost.exe Set value (str) \REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Pictures\\My Wallpaper.jpg" svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
Processes:
vssadmin.exepid process 1276 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
Processes:
NOTEPAD.EXEpid process 1432 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
Processes:
svchost.exepid process 888 svchost.exe -
Suspicious behavior: EnumeratesProcesses 3 IoCs
Processes:
3a2b0d7aa2a94d6d537838a2a18fa25890c2df97c7708e895f7c566f7a65ab76.exesvchost.exepid process 1436 3a2b0d7aa2a94d6d537838a2a18fa25890c2df97c7708e895f7c566f7a65ab76.exe 888 svchost.exe 888 svchost.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
Processes:
3a2b0d7aa2a94d6d537838a2a18fa25890c2df97c7708e895f7c566f7a65ab76.exesvchost.exevssvc.exeWMIC.exewbengine.exedescription pid process Token: SeDebugPrivilege 1436 3a2b0d7aa2a94d6d537838a2a18fa25890c2df97c7708e895f7c566f7a65ab76.exe Token: SeDebugPrivilege 888 svchost.exe Token: SeBackupPrivilege 1968 vssvc.exe Token: SeRestorePrivilege 1968 vssvc.exe Token: SeAuditPrivilege 1968 vssvc.exe Token: SeIncreaseQuotaPrivilege 1952 WMIC.exe Token: SeSecurityPrivilege 1952 WMIC.exe Token: SeTakeOwnershipPrivilege 1952 WMIC.exe Token: SeLoadDriverPrivilege 1952 WMIC.exe Token: SeSystemProfilePrivilege 1952 WMIC.exe Token: SeSystemtimePrivilege 1952 WMIC.exe Token: SeProfSingleProcessPrivilege 1952 WMIC.exe Token: SeIncBasePriorityPrivilege 1952 WMIC.exe Token: SeCreatePagefilePrivilege 1952 WMIC.exe Token: SeBackupPrivilege 1952 WMIC.exe Token: SeRestorePrivilege 1952 WMIC.exe Token: SeShutdownPrivilege 1952 WMIC.exe Token: SeDebugPrivilege 1952 WMIC.exe Token: SeSystemEnvironmentPrivilege 1952 WMIC.exe Token: SeRemoteShutdownPrivilege 1952 WMIC.exe Token: SeUndockPrivilege 1952 WMIC.exe Token: SeManageVolumePrivilege 1952 WMIC.exe Token: 33 1952 WMIC.exe Token: 34 1952 WMIC.exe Token: 35 1952 WMIC.exe Token: SeIncreaseQuotaPrivilege 1952 WMIC.exe Token: SeSecurityPrivilege 1952 WMIC.exe Token: SeTakeOwnershipPrivilege 1952 WMIC.exe Token: SeLoadDriverPrivilege 1952 WMIC.exe Token: SeSystemProfilePrivilege 1952 WMIC.exe Token: SeSystemtimePrivilege 1952 WMIC.exe Token: SeProfSingleProcessPrivilege 1952 WMIC.exe Token: SeIncBasePriorityPrivilege 1952 WMIC.exe Token: SeCreatePagefilePrivilege 1952 WMIC.exe Token: SeBackupPrivilege 1952 WMIC.exe Token: SeRestorePrivilege 1952 WMIC.exe Token: SeShutdownPrivilege 1952 WMIC.exe Token: SeDebugPrivilege 1952 WMIC.exe Token: SeSystemEnvironmentPrivilege 1952 WMIC.exe Token: SeRemoteShutdownPrivilege 1952 WMIC.exe Token: SeUndockPrivilege 1952 WMIC.exe Token: SeManageVolumePrivilege 1952 WMIC.exe Token: 33 1952 WMIC.exe Token: 34 1952 WMIC.exe Token: 35 1952 WMIC.exe Token: SeBackupPrivilege 1128 wbengine.exe Token: SeRestorePrivilege 1128 wbengine.exe Token: SeSecurityPrivilege 1128 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
Processes:
3a2b0d7aa2a94d6d537838a2a18fa25890c2df97c7708e895f7c566f7a65ab76.exesvchost.execmd.execmd.execmd.exedescription pid process target process PID 1436 wrote to memory of 888 1436 3a2b0d7aa2a94d6d537838a2a18fa25890c2df97c7708e895f7c566f7a65ab76.exe svchost.exe PID 1436 wrote to memory of 888 1436 3a2b0d7aa2a94d6d537838a2a18fa25890c2df97c7708e895f7c566f7a65ab76.exe svchost.exe PID 1436 wrote to memory of 888 1436 3a2b0d7aa2a94d6d537838a2a18fa25890c2df97c7708e895f7c566f7a65ab76.exe svchost.exe PID 888 wrote to memory of 912 888 svchost.exe cmd.exe PID 888 wrote to memory of 912 888 svchost.exe cmd.exe PID 888 wrote to memory of 912 888 svchost.exe cmd.exe PID 912 wrote to memory of 1276 912 cmd.exe vssadmin.exe PID 912 wrote to memory of 1276 912 cmd.exe vssadmin.exe PID 912 wrote to memory of 1276 912 cmd.exe vssadmin.exe PID 912 wrote to memory of 1952 912 cmd.exe WMIC.exe PID 912 wrote to memory of 1952 912 cmd.exe WMIC.exe PID 912 wrote to memory of 1952 912 cmd.exe WMIC.exe PID 888 wrote to memory of 1660 888 svchost.exe cmd.exe PID 888 wrote to memory of 1660 888 svchost.exe cmd.exe PID 888 wrote to memory of 1660 888 svchost.exe cmd.exe PID 1660 wrote to memory of 1644 1660 cmd.exe bcdedit.exe PID 1660 wrote to memory of 1644 1660 cmd.exe bcdedit.exe PID 1660 wrote to memory of 1644 1660 cmd.exe bcdedit.exe PID 1660 wrote to memory of 956 1660 cmd.exe bcdedit.exe PID 1660 wrote to memory of 956 1660 cmd.exe bcdedit.exe PID 1660 wrote to memory of 956 1660 cmd.exe bcdedit.exe PID 888 wrote to memory of 1520 888 svchost.exe cmd.exe PID 888 wrote to memory of 1520 888 svchost.exe cmd.exe PID 888 wrote to memory of 1520 888 svchost.exe cmd.exe PID 1520 wrote to memory of 1392 1520 cmd.exe wbadmin.exe PID 1520 wrote to memory of 1392 1520 cmd.exe wbadmin.exe PID 1520 wrote to memory of 1392 1520 cmd.exe wbadmin.exe PID 888 wrote to memory of 1432 888 svchost.exe NOTEPAD.EXE PID 888 wrote to memory of 1432 888 svchost.exe NOTEPAD.EXE PID 888 wrote to memory of 1432 888 svchost.exe NOTEPAD.EXE -
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.
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Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
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C:\Users\Admin\AppData\Local\Temp\3a2b0d7aa2a94d6d537838a2a18fa25890c2df97c7708e895f7c566f7a65ab76.exe"C:\Users\Admin\AppData\Local\Temp\3a2b0d7aa2a94d6d537838a2a18fa25890c2df97c7708e895f7c566f7a65ab76.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"2⤵
- Modifies extensions of user files
- Drops startup file
- Executes dropped EXE
- Drops desktop.ini file(s)
- Sets desktop wallpaper using registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\readme.txt3⤵
- Opens file in notepad (likely ransom note)
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Roaming\readme.txtFilesize
1KB
MD5ec607b3314664a69da75c6c3578480d5
SHA171051888da2de56b1014c900fec172c5a4f80ee0
SHA2561f07fbece71d67c140a10aa9993f1d5bba5250f21b7cfafcc39e4ea60689223c
SHA512343075967c4dec8acf245a606b9c8af151f64928a28ca50a525743d5daccf7b6b51b61da56506962a94afb9f6e22bed8ed48aefe7bcc484b8b4f6b86655e0d58
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C:\Users\Admin\AppData\Roaming\svchost.exeFilesize
1.1MB
MD5d6cf5f8289eac27c551334578e6e4d9f
SHA125f581c79b08f85ffe729bfec35fdc1ba6ef0add
SHA2563a2b0d7aa2a94d6d537838a2a18fa25890c2df97c7708e895f7c566f7a65ab76
SHA512258c276fe07b76e1dd1fea7ad1edef73fe95942ed912b91ef1bae70a8a600f5cdce28ced0d4e124f29068ec51adc2c92dad8455481ce9f55b138e3a8d96d13f9
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C:\Users\Admin\AppData\Roaming\svchost.exeFilesize
1.1MB
MD5d6cf5f8289eac27c551334578e6e4d9f
SHA125f581c79b08f85ffe729bfec35fdc1ba6ef0add
SHA2563a2b0d7aa2a94d6d537838a2a18fa25890c2df97c7708e895f7c566f7a65ab76
SHA512258c276fe07b76e1dd1fea7ad1edef73fe95942ed912b91ef1bae70a8a600f5cdce28ced0d4e124f29068ec51adc2c92dad8455481ce9f55b138e3a8d96d13f9
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C:\Users\Admin\Downloads\readme.txtFilesize
1KB
MD5ec607b3314664a69da75c6c3578480d5
SHA171051888da2de56b1014c900fec172c5a4f80ee0
SHA2561f07fbece71d67c140a10aa9993f1d5bba5250f21b7cfafcc39e4ea60689223c
SHA512343075967c4dec8acf245a606b9c8af151f64928a28ca50a525743d5daccf7b6b51b61da56506962a94afb9f6e22bed8ed48aefe7bcc484b8b4f6b86655e0d58
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memory/888-62-0x00000000011D0000-0x00000000012E6000-memory.dmpFilesize
1.1MB
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memory/888-64-0x000000001ADD0000-0x000000001AE50000-memory.dmpFilesize
512KB
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memory/1436-54-0x0000000000DD0000-0x0000000000EE6000-memory.dmpFilesize
1.1MB
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memory/1436-55-0x0000000000340000-0x0000000000346000-memory.dmpFilesize
24KB
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memory/1436-57-0x000000001B080000-0x000000001B100000-memory.dmpFilesize
512KB