Analysis
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max time kernel
135s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
26-10-2024 03:36
Static task
static1
Behavioral task
behavioral1
Sample
d540c15e87f5ef91de29ed9d6c3c830ec610873d9c7fb874777d62f554178c62.dll
Resource
win7-20240903-en
General
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Target
d540c15e87f5ef91de29ed9d6c3c830ec610873d9c7fb874777d62f554178c62.dll
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Size
879KB
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MD5
a8f7c07bb05fa504247aaeb462c441b3
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SHA1
3c43fc52e5781e85b58092fe48959ffb24e019d2
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SHA256
d540c15e87f5ef91de29ed9d6c3c830ec610873d9c7fb874777d62f554178c62
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SHA512
b966f4f6f4a617e9f9ca9595b076ed104861f40cb42da813f1ad2cd8c5c018821dafecda8f9ad80e1fd711edf42905c45926d8bc8cc541a6071fb4f1c986b2c8
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SSDEEP
12288:UNIyZN4+Wv4PLq6Okrh9ZN/hs9Dsdt+SrQtw7:U9TPmirh9Zdh6vS6q
Malware Config
Signatures
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Ramnit family
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Executes dropped EXE 2 IoCs
pid Process 1580 rundll32mgr.exe 3948 WaterMark.exe -
Drops file in System32 directory 1 IoCs
description ioc Process File created C:\Windows\SysWOW64\rundll32mgr.exe rundll32.exe -
resource yara_rule behavioral2/memory/1580-8-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/1580-12-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/1580-16-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/1580-14-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/1580-10-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/3948-29-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/1580-13-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/1580-7-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/1580-6-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/3948-36-0x0000000000400000-0x0000000000454000-memory.dmp upx behavioral2/memory/3948-40-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/3948-37-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/3948-42-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/3948-44-0x0000000000400000-0x0000000000421000-memory.dmp upx -
Drops file in Program Files directory 3 IoCs
description ioc Process File opened for modification C:\Program Files (x86)\Microsoft\pxA018.tmp rundll32mgr.exe File created C:\Program Files (x86)\Microsoft\WaterMark.exe rundll32mgr.exe File opened for modification C:\Program Files (x86)\Microsoft\WaterMark.exe rundll32mgr.exe -
Program crash 2 IoCs
pid pid_target Process procid_target 1544 3108 WerFault.exe 89 2740 4116 WerFault.exe 84 -
System Location Discovery: System Language Discovery 1 TTPs 5 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rundll32.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rundll32mgr.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language WaterMark.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language IEXPLORE.EXE Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language IEXPLORE.EXE -
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Software\Microsoft\Internet Explorer\Main IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Software\Microsoft\Internet Explorer\Main IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Software\Microsoft\Internet Explorer\GPU IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "1" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "1709186871" IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "436678799" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Software\Microsoft\Internet Explorer\VersionManager iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLLowDateTime = "1251635200" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Software\Microsoft\Internet Explorer\VersionManager IEXPLORE.EXE Set value (str) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31139672" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31139672" IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\ iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{912EA13A-934B-11EF-BEF1-DA67B56E6C1B} = "0" iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "1709316641" IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\ iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0" iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000 iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31139672" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "1704478352" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "1" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{913103D0-934B-11EF-BEF1-DA67B56E6C1B} = "0" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31139672" IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\GPU\AdapterInfo = "vendorId=\"0x10de\",deviceID=\"0x8c\",subSysID=\"0x0\",revision=\"0x0\",version=\"10.0.19041.546\"hypervisor=\"No Hypervisor (No SLAT)\"" IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Software\Microsoft\Internet Explorer\VersionManager IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Software\Microsoft\Internet Explorer\Main iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Software\Microsoft\Internet Explorer\DomainSuggestion iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running" iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff3e0000003e000000c4040000a3020000 iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "1704478352" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Software\Microsoft\Internet Explorer\Main iexplore.exe -
Suspicious behavior: EnumeratesProcesses 16 IoCs
pid Process 3948 WaterMark.exe 3948 WaterMark.exe 3948 WaterMark.exe 3948 WaterMark.exe 3948 WaterMark.exe 3948 WaterMark.exe 3948 WaterMark.exe 3948 WaterMark.exe 3948 WaterMark.exe 3948 WaterMark.exe 3948 WaterMark.exe 3948 WaterMark.exe 3948 WaterMark.exe 3948 WaterMark.exe 3948 WaterMark.exe 3948 WaterMark.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 3948 WaterMark.exe -
Suspicious use of FindShellTrayWindow 2 IoCs
pid Process 2976 iexplore.exe 4556 iexplore.exe -
Suspicious use of SetWindowsHookEx 10 IoCs
pid Process 2976 iexplore.exe 4556 iexplore.exe 2976 iexplore.exe 4556 iexplore.exe 376 IEXPLORE.EXE 376 IEXPLORE.EXE 1316 IEXPLORE.EXE 1316 IEXPLORE.EXE 376 IEXPLORE.EXE 376 IEXPLORE.EXE -
Suspicious use of UnmapMainImage 2 IoCs
pid Process 1580 rundll32mgr.exe 3948 WaterMark.exe -
Suspicious use of WriteProcessMemory 28 IoCs
description pid Process procid_target PID 3836 wrote to memory of 4116 3836 rundll32.exe 84 PID 3836 wrote to memory of 4116 3836 rundll32.exe 84 PID 3836 wrote to memory of 4116 3836 rundll32.exe 84 PID 4116 wrote to memory of 1580 4116 rundll32.exe 85 PID 4116 wrote to memory of 1580 4116 rundll32.exe 85 PID 4116 wrote to memory of 1580 4116 rundll32.exe 85 PID 1580 wrote to memory of 3948 1580 rundll32mgr.exe 87 PID 1580 wrote to memory of 3948 1580 rundll32mgr.exe 87 PID 1580 wrote to memory of 3948 1580 rundll32mgr.exe 87 PID 3948 wrote to memory of 3108 3948 WaterMark.exe 89 PID 3948 wrote to memory of 3108 3948 WaterMark.exe 89 PID 3948 wrote to memory of 3108 3948 WaterMark.exe 89 PID 3948 wrote to memory of 3108 3948 WaterMark.exe 89 PID 3948 wrote to memory of 3108 3948 WaterMark.exe 89 PID 3948 wrote to memory of 3108 3948 WaterMark.exe 89 PID 3948 wrote to memory of 3108 3948 WaterMark.exe 89 PID 3948 wrote to memory of 3108 3948 WaterMark.exe 89 PID 3948 wrote to memory of 3108 3948 WaterMark.exe 89 PID 3948 wrote to memory of 2976 3948 WaterMark.exe 98 PID 3948 wrote to memory of 2976 3948 WaterMark.exe 98 PID 3948 wrote to memory of 4556 3948 WaterMark.exe 99 PID 3948 wrote to memory of 4556 3948 WaterMark.exe 99 PID 2976 wrote to memory of 376 2976 iexplore.exe 100 PID 2976 wrote to memory of 376 2976 iexplore.exe 100 PID 4556 wrote to memory of 1316 4556 iexplore.exe 101 PID 2976 wrote to memory of 376 2976 iexplore.exe 100 PID 4556 wrote to memory of 1316 4556 iexplore.exe 101 PID 4556 wrote to memory of 1316 4556 iexplore.exe 101
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\d540c15e87f5ef91de29ed9d6c3c830ec610873d9c7fb874777d62f554178c62.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:3836 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\d540c15e87f5ef91de29ed9d6c3c830ec610873d9c7fb874777d62f554178c62.dll,#12⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4116 -
C:\Windows\SysWOW64\rundll32mgr.exeC:\Windows\SysWOW64\rundll32mgr.exe3⤵
- Executes dropped EXE
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1580 -
C:\Program Files (x86)\Microsoft\WaterMark.exe"C:\Program Files (x86)\Microsoft\WaterMark.exe"4⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3948 -
C:\Windows\SysWOW64\svchost.exeC:\Windows\system32\svchost.exe5⤵PID:3108
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3108 -s 2046⤵
- Program crash
PID:1544
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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
PID:2976 -
C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2976 CREDAT:17410 /prefetch:26⤵
- System Location Discovery: System Language Discovery
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:376
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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
PID:4556 -
C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:4556 CREDAT:17410 /prefetch:26⤵
- System Location Discovery: System Language Discovery
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:1316
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4116 -s 6083⤵
- Program crash
PID:2740
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4116 -ip 41161⤵PID:908
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3108 -ip 31081⤵PID:4692
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{912EA13A-934B-11EF-BEF1-DA67B56E6C1B}.dat
Filesize3KB
MD5cc617410ca54290771168cb4fce757ea
SHA11dfc0973b57de10e8bb9150afa2ff62cf7f13fb9
SHA25667b1864759e49acb64398e6b2e5bdb5d223d94e2f3c94e9c18c9a05b957a30c5
SHA512770a7035712099ec62556b199ba48b656436c358771023447ec42b1178b5f86f1f994d33208faf9c2c9e8345948de0d50607177b7a2f7130994b919ffed8eda0
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C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{913103D0-934B-11EF-BEF1-DA67B56E6C1B}.dat
Filesize5KB
MD54fbc308c9926e870fe9e5b568db95d29
SHA17980f4d97eea0a0af9ac70867b127d1b8a2dc9e5
SHA256638a54171a6c358713d763cac0052cd3f330244f19464c5a239595367032b62d
SHA5126e8c74068ae9a8289a90bc8886f3e9b0f880c937ae7ea112ede960e0bfc726b852d1613e7dc63917e7ba7dfcea116576d282ca53a67417d4e446508429cd1af1
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Filesize
15KB
MD51a545d0052b581fbb2ab4c52133846bc
SHA162f3266a9b9925cd6d98658b92adec673cbe3dd3
SHA256557472aeaebf4c1c800b9df14c190f66d62cbabb011300dbedde2dcddd27a6c1
SHA512bd326d111589d87cd6d019378ec725ac9ac7ad4c36f22453941f7d52f90b747ede4783a83dfff6cae1b3bb46690ad49cffa77f2afda019b22863ac485b406e8d
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Filesize
17KB
MD55a34cb996293fde2cb7a4ac89587393a
SHA13c96c993500690d1a77873cd62bc639b3a10653f
SHA256c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad
SHA512e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee
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Filesize
293KB
MD5b913d0bea98b4e215fc9c9c0fb4bd351
SHA1bc6a89a2895bff53c0e80ef390ffaf022e38dc86
SHA2569621bb5921c596eb5246df3b5d59d3be598b4ef2d92dbf19a25c8f66cee9f2f9
SHA5123739ab8eeeea6d3759fa519e0c095b357e7044551a0e743cbf63b70e991bd9c52d4c6bd322cb6126d014ac85e07b081ef57591935b3225c9a30db0f3866f275b