Analysis
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max time kernel
150s -
max time network
147s -
platform
windows10-1703_x64 -
resource
win10-20230220-en -
resource tags
arch:x64arch:x86image:win10-20230220-enlocale:en-usos:windows10-1703-x64system -
submitted
27-03-2023 13:47
Static task
static1
General
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Target
40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe
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Size
4.1MB
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MD5
5ca7ae46151d4649da9371699d5896d2
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SHA1
9643aae907f7ca38bdde1dbe2ccd1d76e77ace59
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SHA256
40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21
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SHA512
b221816fe1d0d84569f12acef4496807f3854c34df464e09ebd3b5d88bac35473c6b9bff3231dc2310a6517b5ebab6e5000c6578c7391bd4734303e658ff341d
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SSDEEP
98304:qkqCk810HajeBhok089IZwzx3irAwQJoxf5d:uw1neBhrj9I2GQJm
Malware Config
Signatures
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Glupteba payload 17 IoCs
Processes:
resource yara_rule behavioral1/memory/2420-122-0x0000000003030000-0x00000000038A7000-memory.dmp family_glupteba behavioral1/memory/2420-123-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/4220-128-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/3796-136-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/3796-137-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/3796-138-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/3796-139-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/3796-140-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/3796-141-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/3796-142-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/3796-143-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/3796-144-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/3796-145-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/3796-146-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/3796-147-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/3796-148-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/3796-155-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba -
Processes:
40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\csrss = "0" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\windefender.exe = "0" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\System32\drivers = "0" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Processes\csrss.exe = "0" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Processes\windefender.exe = "0" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Processes\40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe = "0" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\rss = "0" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe -
Modifies Windows Firewall 1 TTPs 1 IoCs
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Executes dropped EXE 3 IoCs
Processes:
csrss.exeinjector.exef801950a962ddba14caaa44bf084b55c.exepid process 3796 csrss.exe 1296 injector.exe 5044 f801950a962ddba14caaa44bf084b55c.exe -
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\csrss\f801950a962ddba14caaa44bf084b55c.exe upx C:\Users\Admin\AppData\Local\Temp\csrss\f801950a962ddba14caaa44bf084b55c.exe upx behavioral1/memory/5044-154-0x0000000000400000-0x0000000000C25000-memory.dmp upx behavioral1/memory/5044-156-0x0000000000400000-0x0000000000C25000-memory.dmp upx -
Processes:
40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\windefender.exe = "0" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\System32\drivers = "0" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Processes\csrss.exe = "0" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Processes\windefender.exe = "0" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Processes\40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe = "0" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\rss = "0" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\csrss = "0" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
csrss.exe40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-640001698-3754512395-3275565439-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\"" csrss.exe Set value (str) \REGISTRY\USER\S-1-5-21-640001698-3754512395-3275565439-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\"" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe -
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Manipulates WinMonFS driver. 1 IoCs
Roottkits write to WinMonFS to hide directories/files from being detected.
Processes:
csrss.exedescription ioc process File opened for modification \??\WinMonFS csrss.exe -
Checks for VirtualBox DLLs, possible anti-VM trick 1 TTPs 1 IoCs
Certain files are specific to VirtualBox VMs and can be used to detect execution in a VM.
Processes:
40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exedescription ioc process File opened (read-only) \??\VBoxMiniRdrDN 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe -
Drops file in Windows directory 2 IoCs
Processes:
40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exedescription ioc process File opened for modification C:\Windows\rss 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe File created C:\Windows\rss\csrss.exe 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe -
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Modifies data under HKEY_USERS 64 IoCs
Processes:
40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.execsrss.exenetsh.exedescription ioc process Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-492 = "India Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-31 = "Mid-Atlantic Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-962 = "Paraguay Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2452 = "Saint Pierre Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-334 = "Jordan Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2392 = "Aleutian Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2162 = "Altai Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2181 = "Astrakhan Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-162 = "Central Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2431 = "Cuba Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2432 = "Cuba Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-742 = "New Zealand Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-131 = "US Eastern Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-672 = "AUS Eastern Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-512 = "Central Asia Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-222 = "Alaskan Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2531 = "Chatham Islands Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-411 = "E. Africa Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-51 = "Greenland Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-91 = "Pacific SA Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-82 = "Atlantic Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-231 = "Hawaiian Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-392 = "Arab Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-271 = "Greenwich Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-384 = "Namibia Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-214 = "Pacific Daylight Time (Mexico)" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (data) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\LanguageList = 65006e002d0055005300000065006e0000000000 csrss.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1912 = "Russia TZ 10 Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1661 = "Bahia Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-662 = "Cen. Australia Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-661 = "Cen. Australia Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-282 = "Central Europe Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-542 = "Myanmar Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-451 = "Caucasus Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-912 = "Mauritius Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-71 = "Newfoundland Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2632 = "Norfolk Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1892 = "Russia TZ 3 Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-731 = "Fiji Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-352 = "FLE Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-242 = "Samoa Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-201 = "US Mountain Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2142 = "Transbaikal Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Key created \REGISTRY\USER\.DEFAULT\SYSTEM netsh.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1021 = "Bangladesh Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-435 = "Georgian Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-211 = "Pacific Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-831 = "SA Eastern Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-602 = "Taipei Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-372 = "Jerusalem Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1472 = "Magadan Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2322 = "Sakhalin Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2571 = "Turks and Caicos Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-331 = "E. Europe Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1822 = "Russia TZ 1 Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-182 = "Mountain Standard Time (Mexico)" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-212 = "Pacific Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-791 = "SA Western Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-272 = "Greenwich Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-335 = "Jordan Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-772 = "Montevideo Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-631 = "Tokyo Daylight Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2182 = "Astrakhan Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-449 = "Azerbaijan Standard Time" 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exeinjector.execsrss.exepid process 2420 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe 2420 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe 4220 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe 4220 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe 4220 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe 4220 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe 4220 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe 4220 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe 4220 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe 4220 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe 4220 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe 4220 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 3796 csrss.exe 3796 csrss.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 3796 csrss.exe 3796 csrss.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe 1296 injector.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.execsrss.exedescription pid process Token: SeDebugPrivilege 2420 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Token: SeImpersonatePrivilege 2420 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe Token: SeSystemEnvironmentPrivilege 3796 csrss.exe -
Suspicious use of WriteProcessMemory 12 IoCs
Processes:
40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.execmd.execsrss.exedescription pid process target process PID 4220 wrote to memory of 3016 4220 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe cmd.exe PID 4220 wrote to memory of 3016 4220 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe cmd.exe PID 3016 wrote to memory of 4120 3016 cmd.exe netsh.exe PID 3016 wrote to memory of 4120 3016 cmd.exe netsh.exe PID 4220 wrote to memory of 3796 4220 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe csrss.exe PID 4220 wrote to memory of 3796 4220 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe csrss.exe PID 4220 wrote to memory of 3796 4220 40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe csrss.exe PID 3796 wrote to memory of 1296 3796 csrss.exe injector.exe PID 3796 wrote to memory of 1296 3796 csrss.exe injector.exe PID 3796 wrote to memory of 5044 3796 csrss.exe f801950a962ddba14caaa44bf084b55c.exe PID 3796 wrote to memory of 5044 3796 csrss.exe f801950a962ddba14caaa44bf084b55c.exe PID 3796 wrote to memory of 5044 3796 csrss.exe f801950a962ddba14caaa44bf084b55c.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.
Processes
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C:\Users\Admin\AppData\Local\Temp\40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe"C:\Users\Admin\AppData\Local\Temp\40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Local\Temp\40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe"C:\Users\Admin\AppData\Local\Temp\40f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21.exe"2⤵
- Windows security bypass
- Windows security modification
- Adds Run key to start application
- Checks for VirtualBox DLLs, possible anti-VM trick
- Drops file in Windows directory
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\cmd.exeC:\Windows\Sysnative\cmd.exe /C "netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes"3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\netsh.exenetsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes4⤵
- Modifies Windows Firewall
- Modifies data under HKEY_USERS
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C:\Windows\rss\csrss.exeC:\Windows\rss\csrss.exe3⤵
- Executes dropped EXE
- Adds Run key to start application
- Manipulates WinMonFS driver.
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exeschtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F4⤵
- Creates scheduled task(s)
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C:\Windows\SYSTEM32\schtasks.exeschtasks /delete /tn ScheduledUpdate /f4⤵
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C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exeC:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe taskmgr.exe C:\Users\Admin\AppData\Local\Temp\csrss\injector\NtQuerySystemInformationHook.dll4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
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C:\Windows\SYSTEM32\schtasks.exeschtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F4⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\csrss\f801950a962ddba14caaa44bf084b55c.exeC:\Users\Admin\AppData\Local\Temp\csrss\f801950a962ddba14caaa44bf084b55c.exe4⤵
- 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\Temp\csrss\f801950a962ddba14caaa44bf084b55c.exeFilesize
3.2MB
MD5f801950a962ddba14caaa44bf084b55c
SHA17cadc9076121297428442785536ba0df2d4ae996
SHA256c3946ec89e15b24b743c46f9acacb58cff47da63f3ce2799d71ed90496b8891f
SHA5124183bc76bdc84fb779e2e573d9a63d7de47096b63b945f9e335bee95ae28eb208f5ee15f6501ac59623b97c5b77f3455ca313512e7d9803e1704ae22a52459c5
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C:\Users\Admin\AppData\Local\Temp\csrss\f801950a962ddba14caaa44bf084b55c.exeFilesize
3.2MB
MD5f801950a962ddba14caaa44bf084b55c
SHA17cadc9076121297428442785536ba0df2d4ae996
SHA256c3946ec89e15b24b743c46f9acacb58cff47da63f3ce2799d71ed90496b8891f
SHA5124183bc76bdc84fb779e2e573d9a63d7de47096b63b945f9e335bee95ae28eb208f5ee15f6501ac59623b97c5b77f3455ca313512e7d9803e1704ae22a52459c5
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C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exeFilesize
281KB
MD5d98e33b66343e7c96158444127a117f6
SHA1bb716c5509a2bf345c6c1152f6e3e1452d39d50d
SHA2565de4e2b07a26102fe527606ce5da1d5a4b938967c9d380a3c5fe86e2e34aaaf1
SHA512705275e4a1ba8205eb799a8cf1737bc8ba686925e52c9198a6060a7abeee65552a85b814ac494a4b975d496a63be285f19a6265550585f2fc85824c42d7efab5
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C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exeFilesize
281KB
MD5d98e33b66343e7c96158444127a117f6
SHA1bb716c5509a2bf345c6c1152f6e3e1452d39d50d
SHA2565de4e2b07a26102fe527606ce5da1d5a4b938967c9d380a3c5fe86e2e34aaaf1
SHA512705275e4a1ba8205eb799a8cf1737bc8ba686925e52c9198a6060a7abeee65552a85b814ac494a4b975d496a63be285f19a6265550585f2fc85824c42d7efab5
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C:\Windows\rss\csrss.exeFilesize
4.1MB
MD55ca7ae46151d4649da9371699d5896d2
SHA19643aae907f7ca38bdde1dbe2ccd1d76e77ace59
SHA25640f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21
SHA512b221816fe1d0d84569f12acef4496807f3854c34df464e09ebd3b5d88bac35473c6b9bff3231dc2310a6517b5ebab6e5000c6578c7391bd4734303e658ff341d
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C:\Windows\rss\csrss.exeFilesize
4.1MB
MD55ca7ae46151d4649da9371699d5896d2
SHA19643aae907f7ca38bdde1dbe2ccd1d76e77ace59
SHA25640f4b7f3ab4434ee16206f8e3a0eea19d316f94acbdb5f8d5111c9ae9db2ef21
SHA512b221816fe1d0d84569f12acef4496807f3854c34df464e09ebd3b5d88bac35473c6b9bff3231dc2310a6517b5ebab6e5000c6578c7391bd4734303e658ff341d
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memory/2420-122-0x0000000003030000-0x00000000038A7000-memory.dmpFilesize
8.5MB
-
memory/2420-123-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
-
memory/3796-141-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
-
memory/3796-146-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
-
memory/3796-139-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
-
memory/3796-140-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
-
memory/3796-137-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
-
memory/3796-142-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
-
memory/3796-143-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
-
memory/3796-144-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
-
memory/3796-145-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
-
memory/3796-138-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
-
memory/3796-147-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
-
memory/3796-148-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
-
memory/3796-136-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
-
memory/3796-155-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/4220-128-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/5044-154-0x0000000000400000-0x0000000000C25000-memory.dmpFilesize
8.1MB
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memory/5044-156-0x0000000000400000-0x0000000000C25000-memory.dmpFilesize
8.1MB