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Analysis
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max time kernel
119s -
max time network
165s -
platform
windows10-1703_x64 -
resource
win10-20220812-en -
resource tags
arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system -
submitted
20/09/2022, 14:16
Static task
static1
Behavioral task
behavioral1
Sample
c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe
Resource
win10-20220812-en
General
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Target
c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe
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Size
718KB
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MD5
92a65a9a5f4a89adc13f06f302a60f69
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SHA1
b07df7c87f4f7bac7a43ea9f4eb367fb8b19a03e
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SHA256
c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb
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SHA512
3c14ec96d12274553ea046776862c3e4396b2c76b60b7bb8ae881adb0be16a29a52fb50c05185d568b4c2af1cdf6914738bedb13a1c8b71c74d108f32963bc38
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SSDEEP
12288:IPq/ToVHTlcS08kHxz2rhS8HoT56l98dnFBBp7Psba5NGs5o5lw9wU8FClc:IC/TSholsS8Hhlu56u59wNW
Malware Config
Extracted
djvu
http://acacaca.org/test1/get.php
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extension
.mmpu
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offline_id
yd6oYv6aBN90yFzTWdZ34sXSXtXiauzOLXZyWht1
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payload_url
http://rgyui.top/dl/build2.exe
http://acacaca.org/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 8 IoCs
resource yara_rule behavioral2/memory/4696-145-0x0000000004A00000-0x0000000004B1B000-memory.dmp family_djvu behavioral2/memory/512-150-0x0000000000424141-mapping.dmp family_djvu behavioral2/memory/512-149-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/512-156-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/512-204-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/512-250-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1748-276-0x0000000000424141-mapping.dmp family_djvu behavioral2/memory/1748-335-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Downloads MZ/PE file
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Executes dropped EXE 4 IoCs
pid Process 4596 build2.exe 4344 build2.exe 1616 build3.exe 1308 mstsca.exe -
Loads dropped DLL 2 IoCs
pid Process 4344 build2.exe 4344 build2.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 1544 icacls.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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Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1099808672-3828198950-1535142148-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\3d75129f-2af1-4c3a-8acf-497cb9e5bdea\\c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe\" --AutoStart" c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.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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Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 1 api.2ip.ua 2 api.2ip.ua -
Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 4696 set thread context of 512 4696 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 66 PID 3832 set thread context of 1748 3832 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 70 PID 4596 set thread context of 4344 4596 build2.exe 72 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 build2.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString build2.exe -
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 2108 schtasks.exe 4408 schtasks.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 1244 timeout.exe -
Kills process with taskkill 1 IoCs
pid Process 2356 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 512 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 512 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 1748 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 1748 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 4344 build2.exe 4344 build2.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2356 taskkill.exe -
Suspicious use of WriteProcessMemory 56 IoCs
description pid Process procid_target PID 4696 wrote to memory of 512 4696 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 66 PID 4696 wrote to memory of 512 4696 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 66 PID 4696 wrote to memory of 512 4696 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 66 PID 4696 wrote to memory of 512 4696 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 66 PID 4696 wrote to memory of 512 4696 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 66 PID 4696 wrote to memory of 512 4696 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 66 PID 4696 wrote to memory of 512 4696 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 66 PID 4696 wrote to memory of 512 4696 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 66 PID 4696 wrote to memory of 512 4696 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 66 PID 4696 wrote to memory of 512 4696 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 66 PID 512 wrote to memory of 1544 512 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 67 PID 512 wrote to memory of 1544 512 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 67 PID 512 wrote to memory of 1544 512 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 67 PID 512 wrote to memory of 3832 512 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 68 PID 512 wrote to memory of 3832 512 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 68 PID 512 wrote to memory of 3832 512 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 68 PID 3832 wrote to memory of 1748 3832 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 70 PID 3832 wrote to memory of 1748 3832 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 70 PID 3832 wrote to memory of 1748 3832 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 70 PID 3832 wrote to memory of 1748 3832 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 70 PID 3832 wrote to memory of 1748 3832 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 70 PID 3832 wrote to memory of 1748 3832 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 70 PID 3832 wrote to memory of 1748 3832 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 70 PID 3832 wrote to memory of 1748 3832 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 70 PID 3832 wrote to memory of 1748 3832 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 70 PID 3832 wrote to memory of 1748 3832 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 70 PID 1748 wrote to memory of 4596 1748 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 71 PID 1748 wrote to memory of 4596 1748 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 71 PID 1748 wrote to memory of 4596 1748 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 71 PID 4596 wrote to memory of 4344 4596 build2.exe 72 PID 4596 wrote to memory of 4344 4596 build2.exe 72 PID 4596 wrote to memory of 4344 4596 build2.exe 72 PID 4596 wrote to memory of 4344 4596 build2.exe 72 PID 4596 wrote to memory of 4344 4596 build2.exe 72 PID 4596 wrote to memory of 4344 4596 build2.exe 72 PID 4596 wrote to memory of 4344 4596 build2.exe 72 PID 4596 wrote to memory of 4344 4596 build2.exe 72 PID 4596 wrote to memory of 4344 4596 build2.exe 72 PID 1748 wrote to memory of 1616 1748 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 73 PID 1748 wrote to memory of 1616 1748 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 73 PID 1748 wrote to memory of 1616 1748 c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe 73 PID 1616 wrote to memory of 2108 1616 build3.exe 74 PID 1616 wrote to memory of 2108 1616 build3.exe 74 PID 1616 wrote to memory of 2108 1616 build3.exe 74 PID 4344 wrote to memory of 4108 4344 build2.exe 78 PID 4344 wrote to memory of 4108 4344 build2.exe 78 PID 4344 wrote to memory of 4108 4344 build2.exe 78 PID 4108 wrote to memory of 2356 4108 cmd.exe 77 PID 4108 wrote to memory of 2356 4108 cmd.exe 77 PID 4108 wrote to memory of 2356 4108 cmd.exe 77 PID 4108 wrote to memory of 1244 4108 cmd.exe 80 PID 4108 wrote to memory of 1244 4108 cmd.exe 80 PID 4108 wrote to memory of 1244 4108 cmd.exe 80 PID 1308 wrote to memory of 4408 1308 mstsca.exe 83 PID 1308 wrote to memory of 4408 1308 mstsca.exe 83 PID 1308 wrote to memory of 4408 1308 mstsca.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe"C:\Users\Admin\AppData\Local\Temp\c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4696 -
C:\Users\Admin\AppData\Local\Temp\c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe"C:\Users\Admin\AppData\Local\Temp\c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:512 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\3d75129f-2af1-4c3a-8acf-497cb9e5bdea" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1544
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C:\Users\Admin\AppData\Local\Temp\c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe"C:\Users\Admin\AppData\Local\Temp\c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3832 -
C:\Users\Admin\AppData\Local\Temp\c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe"C:\Users\Admin\AppData\Local\Temp\c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1748 -
C:\Users\Admin\AppData\Local\682a0d72-e548-46ab-ab6e-91340cc2bb2f\build2.exe"C:\Users\Admin\AppData\Local\682a0d72-e548-46ab-ab6e-91340cc2bb2f\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4596 -
C:\Users\Admin\AppData\Local\682a0d72-e548-46ab-ab6e-91340cc2bb2f\build2.exe"C:\Users\Admin\AppData\Local\682a0d72-e548-46ab-ab6e-91340cc2bb2f\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4344 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" \/c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\682a0d72-e548-46ab-ab6e-91340cc2bb2f\build2.exe" & del C:\PrograData\*.dll & exit7⤵
- Suspicious use of WriteProcessMemory
PID:4108 -
C:\Windows\SysWOW64\timeout.exetimeout /t 68⤵
- Delays execution with timeout.exe
PID:1244
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C:\Users\Admin\AppData\Local\682a0d72-e548-46ab-ab6e-91340cc2bb2f\build3.exe"C:\Users\Admin\AppData\Local\682a0d72-e548-46ab-ab6e-91340cc2bb2f\build3.exe"5⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:1616 -
C:\Windows\SysWOW64\schtasks.exe/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"6⤵
- Creates scheduled task(s)
PID:2108
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C:\Windows\SysWOW64\taskkill.exetaskkill /im build2.exe /f1⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:2356
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C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exeC:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:1308 -
C:\Windows\SysWOW64\schtasks.exe/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"2⤵
- Creates scheduled task(s)
PID:4408
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\3d75129f-2af1-4c3a-8acf-497cb9e5bdea\c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb.exe
Filesize718KB
MD592a65a9a5f4a89adc13f06f302a60f69
SHA1b07df7c87f4f7bac7a43ea9f4eb367fb8b19a03e
SHA256c76265bbcddc396d77d897139041be4acc1b0cbc4d5e37de75251eebcb7f12bb
SHA5123c14ec96d12274553ea046776862c3e4396b2c76b60b7bb8ae881adb0be16a29a52fb50c05185d568b4c2af1cdf6914738bedb13a1c8b71c74d108f32963bc38
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Filesize
246KB
MD54e08ecaa075b90f30327bf200d23130b
SHA1f7b67a7abbe3815bd758933f7c4712bd4d4ec4b2
SHA2566c11af0bbd346329224255d38a07fb9db5828881d3520ab4623c7a5fc09ecd47
SHA512e7deeafe000b034cd4d71776cd1285e33d295a830f3459506dd7332e8c1c61b43ec2fdc406c22ba5262aa62a795421492f7e54602bfe08102b8b2a000d150bb7
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Filesize
246KB
MD54e08ecaa075b90f30327bf200d23130b
SHA1f7b67a7abbe3815bd758933f7c4712bd4d4ec4b2
SHA2566c11af0bbd346329224255d38a07fb9db5828881d3520ab4623c7a5fc09ecd47
SHA512e7deeafe000b034cd4d71776cd1285e33d295a830f3459506dd7332e8c1c61b43ec2fdc406c22ba5262aa62a795421492f7e54602bfe08102b8b2a000d150bb7
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Filesize
246KB
MD54e08ecaa075b90f30327bf200d23130b
SHA1f7b67a7abbe3815bd758933f7c4712bd4d4ec4b2
SHA2566c11af0bbd346329224255d38a07fb9db5828881d3520ab4623c7a5fc09ecd47
SHA512e7deeafe000b034cd4d71776cd1285e33d295a830f3459506dd7332e8c1c61b43ec2fdc406c22ba5262aa62a795421492f7e54602bfe08102b8b2a000d150bb7
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
593KB
MD5c8fd9be83bc728cc04beffafc2907fe9
SHA195ab9f701e0024cedfbd312bcfe4e726744c4f2e
SHA256ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
SHA512fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040
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Filesize
2.0MB
MD51cc453cdf74f31e4d913ff9c10acdde2
SHA16e85eae544d6e965f15fa5c39700fa7202f3aafe
SHA256ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
SHA512dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571