Analysis
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max time kernel
118s -
max time network
125s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
08/09/2022, 23:34
Static task
static1
Behavioral task
behavioral1
Sample
79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe
Resource
win10v2004-20220812-en
General
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Target
79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe
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Size
724KB
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MD5
3acd69a6bfb52f5953e1bd11f6559bee
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SHA1
a328848da5014d77215f09a732c69a19415e9b18
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SHA256
79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f
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SHA512
2ddbea23e46d62c69cb69e9fd19e51db5e1d96ef9cab3f3738185190e45891ee706f9dbd841dbd74b775581f2524803f5f3e902ea613d301815e7f9a3d2be721
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SSDEEP
12288:NX3E1omaBWmhlGdtPFwmXhXeTTisza10xSVlIXlC+EDkYsmTooUxF0hJmOku7xcZ:NHcomaksGjFwchuPis+MSVEc+EDk4To1
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 10 IoCs
resource yara_rule behavioral1/memory/924-133-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/924-134-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/924-136-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1332-137-0x0000000004B20000-0x0000000004C3B000-memory.dmp family_djvu behavioral1/memory/924-138-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/924-142-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1396-145-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1396-147-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1396-152-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1396-167-0x0000000000400000-0x0000000000537000-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 2 IoCs
pid Process 1880 build2.exe 4552 build2.exe -
Checks computer location settings 2 TTPs 3 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation build2.exe -
Loads dropped DLL 3 IoCs
pid Process 4552 build2.exe 4552 build2.exe 4552 build2.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 3284 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-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\3f939ff7-2e5a-491b-9cdd-f2cb2ae6053d\\79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe\" --AutoStart" 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.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 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 25 api.2ip.ua 30 api.2ip.ua 24 api.2ip.ua -
Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 1332 set thread context of 924 1332 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 82 PID 2100 set thread context of 1396 2100 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 89 PID 1880 set thread context of 4552 1880 build2.exe 94 -
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 -
Delays execution with timeout.exe 1 IoCs
pid Process 2104 timeout.exe -
Kills process with taskkill 1 IoCs
pid Process 4288 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 924 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 924 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 1396 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 1396 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 4552 build2.exe 4552 build2.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 4288 taskkill.exe -
Suspicious use of WriteProcessMemory 47 IoCs
description pid Process procid_target PID 1332 wrote to memory of 924 1332 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 82 PID 1332 wrote to memory of 924 1332 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 82 PID 1332 wrote to memory of 924 1332 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 82 PID 1332 wrote to memory of 924 1332 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 82 PID 1332 wrote to memory of 924 1332 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 82 PID 1332 wrote to memory of 924 1332 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 82 PID 1332 wrote to memory of 924 1332 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 82 PID 1332 wrote to memory of 924 1332 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 82 PID 1332 wrote to memory of 924 1332 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 82 PID 1332 wrote to memory of 924 1332 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 82 PID 924 wrote to memory of 3284 924 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 85 PID 924 wrote to memory of 3284 924 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 85 PID 924 wrote to memory of 3284 924 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 85 PID 924 wrote to memory of 2100 924 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 87 PID 924 wrote to memory of 2100 924 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 87 PID 924 wrote to memory of 2100 924 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 87 PID 2100 wrote to memory of 1396 2100 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 89 PID 2100 wrote to memory of 1396 2100 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 89 PID 2100 wrote to memory of 1396 2100 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 89 PID 2100 wrote to memory of 1396 2100 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 89 PID 2100 wrote to memory of 1396 2100 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 89 PID 2100 wrote to memory of 1396 2100 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 89 PID 2100 wrote to memory of 1396 2100 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 89 PID 2100 wrote to memory of 1396 2100 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 89 PID 2100 wrote to memory of 1396 2100 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 89 PID 2100 wrote to memory of 1396 2100 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 89 PID 1396 wrote to memory of 1880 1396 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 91 PID 1396 wrote to memory of 1880 1396 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 91 PID 1396 wrote to memory of 1880 1396 79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe 91 PID 1880 wrote to memory of 4552 1880 build2.exe 94 PID 1880 wrote to memory of 4552 1880 build2.exe 94 PID 1880 wrote to memory of 4552 1880 build2.exe 94 PID 1880 wrote to memory of 4552 1880 build2.exe 94 PID 1880 wrote to memory of 4552 1880 build2.exe 94 PID 1880 wrote to memory of 4552 1880 build2.exe 94 PID 1880 wrote to memory of 4552 1880 build2.exe 94 PID 1880 wrote to memory of 4552 1880 build2.exe 94 PID 1880 wrote to memory of 4552 1880 build2.exe 94 PID 4552 wrote to memory of 760 4552 build2.exe 95 PID 4552 wrote to memory of 760 4552 build2.exe 95 PID 4552 wrote to memory of 760 4552 build2.exe 95 PID 760 wrote to memory of 4288 760 cmd.exe 97 PID 760 wrote to memory of 4288 760 cmd.exe 97 PID 760 wrote to memory of 4288 760 cmd.exe 97 PID 760 wrote to memory of 2104 760 cmd.exe 98 PID 760 wrote to memory of 2104 760 cmd.exe 98 PID 760 wrote to memory of 2104 760 cmd.exe 98
Processes
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C:\Users\Admin\AppData\Local\Temp\79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe"C:\Users\Admin\AppData\Local\Temp\79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1332 -
C:\Users\Admin\AppData\Local\Temp\79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe"C:\Users\Admin\AppData\Local\Temp\79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:924 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\3f939ff7-2e5a-491b-9cdd-f2cb2ae6053d" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:3284
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C:\Users\Admin\AppData\Local\Temp\79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe"C:\Users\Admin\AppData\Local\Temp\79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2100 -
C:\Users\Admin\AppData\Local\Temp\79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe"C:\Users\Admin\AppData\Local\Temp\79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1396 -
C:\Users\Admin\AppData\Local\6627061e-9913-4ea1-8b41-9d3e0eef1461\build2.exe"C:\Users\Admin\AppData\Local\6627061e-9913-4ea1-8b41-9d3e0eef1461\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1880 -
C:\Users\Admin\AppData\Local\6627061e-9913-4ea1-8b41-9d3e0eef1461\build2.exe"C:\Users\Admin\AppData\Local\6627061e-9913-4ea1-8b41-9d3e0eef1461\build2.exe"6⤵
- Executes dropped EXE
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4552 -
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\6627061e-9913-4ea1-8b41-9d3e0eef1461\build2.exe" & del C:\PrograData\*.dll & exit7⤵
- Suspicious use of WriteProcessMemory
PID:760 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im build2.exe /f8⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4288
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C:\Windows\SysWOW64\timeout.exetimeout /t 68⤵
- Delays execution with timeout.exe
PID:2104
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
133KB
MD58f73c08a9660691143661bf7332c3c27
SHA137fa65dd737c50fda710fdbde89e51374d0c204a
SHA2563fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA5120042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89
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Filesize
1.2MB
MD5bfac4e3c5908856ba17d41edcd455a51
SHA18eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA5122565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66
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Filesize
630KB
MD5e477a96c8f2b18d6b5c27bde49c990bf
SHA1e980c9bf41330d1e5bd04556db4646a0210f7409
SHA25616574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660
SHA512335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize2KB
MD5215064dd8b4566627489319b46e9ca43
SHA17fa698eef5f02a961b5862df135d7ebfd8a12292
SHA256390f76fdb79029603900524df2f0fbfd05bf18a3bbc74b9b05b2a6dc5938393c
SHA5122a5b12b41d728ce30f1712d23226bbefe73111b786156b97126d6497ef234e78feaf6db08c7412eaa336c869b93ab239cd46b33cc31ff2c8497214cba5927753
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize1KB
MD5a6a0160f7dee79a316edde54d910ebaa
SHA19b374842b8954e8b27a06f22f1c0de15ea768c31
SHA256f3646358e7a0d83e1140296fb384dc20e38a165f8f086cf240ace49e27e5b7c0
SHA5121510a5ac8bb5d3f7a3be3397ef5266861df92bb72d013d8f9432dae8f4310d7d494e67f6b49b712519fb96ef085eb1e233eb8bd4e42bfee10faf0f6da64e4b98
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize488B
MD5e45039690df0d2d3e68de36646342c39
SHA1e71c1c196fac1defe26649392a6f85d8dd099406
SHA25644cca0d93524020d636c4f042048280c9763dfa683cc5afd5e12c4e25b8bf183
SHA512b69d78bfa058fe08d0d9e19349ef3f23c2706f4a76507bf6533a5d62f2f517595ab083c890e00ff3aa2cec0e6a593664125a58dbb5b480e7596729cc573c1151
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize482B
MD5e9142b3266cce3e7281501bf63311b19
SHA170141caec684bb2e03092192e003b08aba6c6f94
SHA2560c874462701a4223a1523fdd3bdcdf5c0c5937d992223ca68df4a5236f2e5fc9
SHA51257f934465f130e8c4864aa288b7bc1fd2e037b10b12f524cdca82742c4101417059efe4d0101633f98c9d384c535bcfb144e05374fcbeebae7e300186d6a2d99
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C:\Users\Admin\AppData\Local\3f939ff7-2e5a-491b-9cdd-f2cb2ae6053d\79ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f.exe
Filesize724KB
MD53acd69a6bfb52f5953e1bd11f6559bee
SHA1a328848da5014d77215f09a732c69a19415e9b18
SHA25679ddbfe6816056c16173f0950de8c6f95cbaa9730f3647f91541d35942d00d6f
SHA5122ddbea23e46d62c69cb69e9fd19e51db5e1d96ef9cab3f3738185190e45891ee706f9dbd841dbd74b775581f2524803f5f3e902ea613d301815e7f9a3d2be721
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Filesize
383KB
MD58d7db6982df46c3b0f0cc879d892c08a
SHA164e3d7ab4793aeb05d18a82159c579e05c45fd71
SHA256116e15e94d70dde65f91f155580bd9b34ff1956b9ebe1a53b6bce912b281c1f6
SHA5120eeb242e6e1356a2a9e3183f12439ef36fac40e27ac8c0df5f591c7b3c1324145627c92c3fee15aedee2c1e8cc3b966152af73a33196166c2c1bfbbd979bdb5b
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Filesize
383KB
MD58d7db6982df46c3b0f0cc879d892c08a
SHA164e3d7ab4793aeb05d18a82159c579e05c45fd71
SHA256116e15e94d70dde65f91f155580bd9b34ff1956b9ebe1a53b6bce912b281c1f6
SHA5120eeb242e6e1356a2a9e3183f12439ef36fac40e27ac8c0df5f591c7b3c1324145627c92c3fee15aedee2c1e8cc3b966152af73a33196166c2c1bfbbd979bdb5b
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Filesize
383KB
MD58d7db6982df46c3b0f0cc879d892c08a
SHA164e3d7ab4793aeb05d18a82159c579e05c45fd71
SHA256116e15e94d70dde65f91f155580bd9b34ff1956b9ebe1a53b6bce912b281c1f6
SHA5120eeb242e6e1356a2a9e3183f12439ef36fac40e27ac8c0df5f591c7b3c1324145627c92c3fee15aedee2c1e8cc3b966152af73a33196166c2c1bfbbd979bdb5b