Analysis
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max time kernel
45s -
max time network
18s -
platform
windows7_x64 -
resource
win7-20230831-en -
resource tags
arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system -
submitted
22/10/2023, 10:44
Static task
static1
Behavioral task
behavioral1
Sample
NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe
Resource
win7-20230831-en
Behavioral task
behavioral2
Sample
NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe
Resource
win10v2004-20230915-en
General
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Target
NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe
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Size
20.8MB
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MD5
74b495ebe781e84c4057267b9c0458bf
-
SHA1
ad6167c9764d1415b1e87c195c0ea496bb206ccb
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SHA256
e1a8fd713a3bb5586ae9653f1c68a16b9142d7e21f80fe5a6395e8c908064e71
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SHA512
20b2941fb9adfe5c5234c354f07c4b3de825fd7d06f969ea541c52eab12bd2e78ad6192e2a8dbf21f9463168e88cef16006424f950e55b4e4fbcd251f7b45e7a
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SSDEEP
98304:9E2RpMMHMMMvMMZMMMlmMMMiMMMYJMMHMMM6MMZMMMqNMMzMMMUMMVMMMYJMMzMh:9nwngnwnBRk
Malware Config
Signatures
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Modifies WinLogon for persistence 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe HelpMe.exe" NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe HelpMe.exe" HelpMe.exe -
Drops startup file 3 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk HelpMe.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe -
Executes dropped EXE 1 IoCs
pid Process 3016 HelpMe.exe -
Loads dropped DLL 2 IoCs
pid Process 2824 NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe 2824 NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe -
Enumerates connected drives 3 TTPs 46 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
description ioc Process File opened (read-only) \??\Z: NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened (read-only) \??\P: HelpMe.exe File opened (read-only) \??\Z: HelpMe.exe File opened (read-only) \??\O: NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened (read-only) \??\H: NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened (read-only) \??\M: NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened (read-only) \??\P: NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened (read-only) \??\Q: NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened (read-only) \??\S: NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened (read-only) \??\V: NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened (read-only) \??\K: HelpMe.exe File opened (read-only) \??\A: NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened (read-only) \??\R: HelpMe.exe File opened (read-only) \??\T: NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened (read-only) \??\W: NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened (read-only) \??\E: HelpMe.exe File opened (read-only) \??\Q: HelpMe.exe File opened (read-only) \??\V: HelpMe.exe File opened (read-only) \??\G: NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened (read-only) \??\Y: NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened (read-only) \??\I: HelpMe.exe File opened (read-only) \??\M: HelpMe.exe File opened (read-only) \??\O: HelpMe.exe File opened (read-only) \??\W: HelpMe.exe File opened (read-only) \??\N: NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened (read-only) \??\I: NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened (read-only) \??\L: NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened (read-only) \??\U: NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened (read-only) \??\B: HelpMe.exe File opened (read-only) \??\G: HelpMe.exe File opened (read-only) \??\L: HelpMe.exe File opened (read-only) \??\N: HelpMe.exe File opened (read-only) \??\E: NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened (read-only) \??\X: HelpMe.exe File opened (read-only) \??\U: HelpMe.exe File opened (read-only) \??\X: NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened (read-only) \??\S: HelpMe.exe File opened (read-only) \??\R: NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened (read-only) \??\H: HelpMe.exe File opened (read-only) \??\J: HelpMe.exe File opened (read-only) \??\T: HelpMe.exe File opened (read-only) \??\J: NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened (read-only) \??\K: NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened (read-only) \??\A: HelpMe.exe File opened (read-only) \??\Y: HelpMe.exe File opened (read-only) \??\B: NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe -
Drops autorun.inf file 1 TTPs 3 IoCs
Malware can abuse Windows Autorun to spread further via attached volumes.
description ioc Process File opened for modification F:\AUTORUN.INF NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened for modification C:\AUTORUN.INF NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File opened for modification F:\AUTORUN.INF HelpMe.exe -
Drops file in System32 directory 4 IoCs
description ioc Process File created C:\Windows\SysWOW64\HelpMe.exe NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe File created C:\Windows\SysWOW64\HelpMe.exe HelpMe.exe File opened for modification C:\Windows\SysWOW64\HelpMe.exe HelpMe.exe File created C:\Windows\SysWOW64\notepad.exe.exe HelpMe.exe -
Drops file in Program Files directory 1 IoCs
description ioc Process File created C:\Program Files (x86)\Internet Explorer\iexplore.exe.exe HelpMe.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 1 IoCs
pid Process 3016 HelpMe.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2824 wrote to memory of 3016 2824 NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe 28 PID 2824 wrote to memory of 3016 2824 NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe 28 PID 2824 wrote to memory of 3016 2824 NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe 28 PID 2824 wrote to memory of 3016 2824 NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe"C:\Users\Admin\AppData\Local\Temp\NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe"1⤵
- Modifies WinLogon for persistence
- Drops startup file
- Loads dropped DLL
- Enumerates connected drives
- Drops autorun.inf file
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2824 -
C:\Windows\SysWOW64\HelpMe.exeC:\Windows\system32\HelpMe.exe2⤵
- Modifies WinLogon for persistence
- Drops startup file
- Executes dropped EXE
- Enumerates connected drives
- Drops autorun.inf file
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
PID:3016
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
20.8MB
MD5646e90cd8a352dcbf250d38dc20f6dfa
SHA144f9123fa6b6102fb3633fa7ca5f2e8134a7da56
SHA256a2b69b2849347a44613fb5d32c80e483b0ba2c411d3895bd360d0e1b34cd6d23
SHA512b46828911e739dfc43c3f8332820ef7a993a54e0422b18e9ec8d3f692ffbdce4ba59da9f70434b2862b5b0219a0c4e41bb1e0cf12fb043f4e01d1d66d4d487fb
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Filesize
1KB
MD5a2756f337cda33daaf111a73b9db859b
SHA1aa0e03d02c992ded81340963b59f0c452fcd58c4
SHA2562668e148f77387acf729ab7a84300bdad70a26928757156379e8f945329da857
SHA512c92f1735d17c4d26565b7c16d999504d1e59dfdc860f5f7a7cdf86d983b4d02557824aa197610e2ee68d91402458111cc25b0428f7addbab22201c771032493b
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Filesize
950B
MD564c1698d85478df4ee1d21c3b85e86be
SHA1c9f4077effb59d6ebade50b1437f6b5a7df73aa2
SHA2562a37b10a2bc6235a89fdb1db6bfe7e2ed02d46cc1340d7e0cc78df7106303b4d
SHA5128db5c38620d0ef713b82f9788a7a78274bbe5ff906dca6756d8e68c9fc9978cda75ddcca70cf5d4c9d47ca3df74b31bc6528dcff901fe0762fca006c9602ee19
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Filesize
1KB
MD5a2756f337cda33daaf111a73b9db859b
SHA1aa0e03d02c992ded81340963b59f0c452fcd58c4
SHA2562668e148f77387acf729ab7a84300bdad70a26928757156379e8f945329da857
SHA512c92f1735d17c4d26565b7c16d999504d1e59dfdc860f5f7a7cdf86d983b4d02557824aa197610e2ee68d91402458111cc25b0428f7addbab22201c771032493b
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Filesize
950B
MD564c1698d85478df4ee1d21c3b85e86be
SHA1c9f4077effb59d6ebade50b1437f6b5a7df73aa2
SHA2562a37b10a2bc6235a89fdb1db6bfe7e2ed02d46cc1340d7e0cc78df7106303b4d
SHA5128db5c38620d0ef713b82f9788a7a78274bbe5ff906dca6756d8e68c9fc9978cda75ddcca70cf5d4c9d47ca3df74b31bc6528dcff901fe0762fca006c9602ee19
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Filesize
1KB
MD5a2756f337cda33daaf111a73b9db859b
SHA1aa0e03d02c992ded81340963b59f0c452fcd58c4
SHA2562668e148f77387acf729ab7a84300bdad70a26928757156379e8f945329da857
SHA512c92f1735d17c4d26565b7c16d999504d1e59dfdc860f5f7a7cdf86d983b4d02557824aa197610e2ee68d91402458111cc25b0428f7addbab22201c771032493b
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Filesize
1KB
MD5a2756f337cda33daaf111a73b9db859b
SHA1aa0e03d02c992ded81340963b59f0c452fcd58c4
SHA2562668e148f77387acf729ab7a84300bdad70a26928757156379e8f945329da857
SHA512c92f1735d17c4d26565b7c16d999504d1e59dfdc860f5f7a7cdf86d983b4d02557824aa197610e2ee68d91402458111cc25b0428f7addbab22201c771032493b
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Filesize
950B
MD564c1698d85478df4ee1d21c3b85e86be
SHA1c9f4077effb59d6ebade50b1437f6b5a7df73aa2
SHA2562a37b10a2bc6235a89fdb1db6bfe7e2ed02d46cc1340d7e0cc78df7106303b4d
SHA5128db5c38620d0ef713b82f9788a7a78274bbe5ff906dca6756d8e68c9fc9978cda75ddcca70cf5d4c9d47ca3df74b31bc6528dcff901fe0762fca006c9602ee19
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Filesize
1KB
MD5a2756f337cda33daaf111a73b9db859b
SHA1aa0e03d02c992ded81340963b59f0c452fcd58c4
SHA2562668e148f77387acf729ab7a84300bdad70a26928757156379e8f945329da857
SHA512c92f1735d17c4d26565b7c16d999504d1e59dfdc860f5f7a7cdf86d983b4d02557824aa197610e2ee68d91402458111cc25b0428f7addbab22201c771032493b
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Filesize
950B
MD564c1698d85478df4ee1d21c3b85e86be
SHA1c9f4077effb59d6ebade50b1437f6b5a7df73aa2
SHA2562a37b10a2bc6235a89fdb1db6bfe7e2ed02d46cc1340d7e0cc78df7106303b4d
SHA5128db5c38620d0ef713b82f9788a7a78274bbe5ff906dca6756d8e68c9fc9978cda75ddcca70cf5d4c9d47ca3df74b31bc6528dcff901fe0762fca006c9602ee19
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Filesize
1KB
MD5a2756f337cda33daaf111a73b9db859b
SHA1aa0e03d02c992ded81340963b59f0c452fcd58c4
SHA2562668e148f77387acf729ab7a84300bdad70a26928757156379e8f945329da857
SHA512c92f1735d17c4d26565b7c16d999504d1e59dfdc860f5f7a7cdf86d983b4d02557824aa197610e2ee68d91402458111cc25b0428f7addbab22201c771032493b
-
Filesize
950B
MD564c1698d85478df4ee1d21c3b85e86be
SHA1c9f4077effb59d6ebade50b1437f6b5a7df73aa2
SHA2562a37b10a2bc6235a89fdb1db6bfe7e2ed02d46cc1340d7e0cc78df7106303b4d
SHA5128db5c38620d0ef713b82f9788a7a78274bbe5ff906dca6756d8e68c9fc9978cda75ddcca70cf5d4c9d47ca3df74b31bc6528dcff901fe0762fca006c9602ee19
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Filesize
1KB
MD5a2756f337cda33daaf111a73b9db859b
SHA1aa0e03d02c992ded81340963b59f0c452fcd58c4
SHA2562668e148f77387acf729ab7a84300bdad70a26928757156379e8f945329da857
SHA512c92f1735d17c4d26565b7c16d999504d1e59dfdc860f5f7a7cdf86d983b4d02557824aa197610e2ee68d91402458111cc25b0428f7addbab22201c771032493b
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Filesize
1KB
MD5a2756f337cda33daaf111a73b9db859b
SHA1aa0e03d02c992ded81340963b59f0c452fcd58c4
SHA2562668e148f77387acf729ab7a84300bdad70a26928757156379e8f945329da857
SHA512c92f1735d17c4d26565b7c16d999504d1e59dfdc860f5f7a7cdf86d983b4d02557824aa197610e2ee68d91402458111cc25b0428f7addbab22201c771032493b
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Filesize
950B
MD564c1698d85478df4ee1d21c3b85e86be
SHA1c9f4077effb59d6ebade50b1437f6b5a7df73aa2
SHA2562a37b10a2bc6235a89fdb1db6bfe7e2ed02d46cc1340d7e0cc78df7106303b4d
SHA5128db5c38620d0ef713b82f9788a7a78274bbe5ff906dca6756d8e68c9fc9978cda75ddcca70cf5d4c9d47ca3df74b31bc6528dcff901fe0762fca006c9602ee19
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Filesize
950B
MD564c1698d85478df4ee1d21c3b85e86be
SHA1c9f4077effb59d6ebade50b1437f6b5a7df73aa2
SHA2562a37b10a2bc6235a89fdb1db6bfe7e2ed02d46cc1340d7e0cc78df7106303b4d
SHA5128db5c38620d0ef713b82f9788a7a78274bbe5ff906dca6756d8e68c9fc9978cda75ddcca70cf5d4c9d47ca3df74b31bc6528dcff901fe0762fca006c9602ee19
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Filesize
20.8MB
MD5fca43a513f65b0d0176b6b9f5fcc6139
SHA148ec0285453af9f2f4bf31d330293635c97af232
SHA256a3e11d48ce3c4b9ef5b2acb0afc2a25e1a9e28aae934a2340e019e1fb34ef868
SHA512959788a918544268020b1096da4b73ade98d068f906626dfaa50594d8fee51fd99945ee9a9b0f39b5e232f8cfeef7217391be434e5432d32c550ce851a131cd8
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Filesize
20.8MB
MD5fca43a513f65b0d0176b6b9f5fcc6139
SHA148ec0285453af9f2f4bf31d330293635c97af232
SHA256a3e11d48ce3c4b9ef5b2acb0afc2a25e1a9e28aae934a2340e019e1fb34ef868
SHA512959788a918544268020b1096da4b73ade98d068f906626dfaa50594d8fee51fd99945ee9a9b0f39b5e232f8cfeef7217391be434e5432d32c550ce851a131cd8
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Filesize
20.8MB
MD5fca43a513f65b0d0176b6b9f5fcc6139
SHA148ec0285453af9f2f4bf31d330293635c97af232
SHA256a3e11d48ce3c4b9ef5b2acb0afc2a25e1a9e28aae934a2340e019e1fb34ef868
SHA512959788a918544268020b1096da4b73ade98d068f906626dfaa50594d8fee51fd99945ee9a9b0f39b5e232f8cfeef7217391be434e5432d32c550ce851a131cd8
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Filesize
145B
MD5ca13857b2fd3895a39f09d9dde3cca97
SHA18b78c5b2ec97c372ebdcef92d14b0998f8dd6dd0
SHA256cfe448b4506a95b33b529efa88f1ac704d8bdf98a941c065650ead27609318ae
SHA51255e5b5325968d1e5314527fb2d26012f5aae4a1c38e305417be273400cb1c6d0c22b85bddb501d7a5720a3f53bb5caf6ada8a7894232344c4f6c6ef85d226b47
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Filesize
20.8MB
MD574b495ebe781e84c4057267b9c0458bf
SHA1ad6167c9764d1415b1e87c195c0ea496bb206ccb
SHA256e1a8fd713a3bb5586ae9653f1c68a16b9142d7e21f80fe5a6395e8c908064e71
SHA51220b2941fb9adfe5c5234c354f07c4b3de825fd7d06f969ea541c52eab12bd2e78ad6192e2a8dbf21f9463168e88cef16006424f950e55b4e4fbcd251f7b45e7a
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Filesize
20.8MB
MD5fca43a513f65b0d0176b6b9f5fcc6139
SHA148ec0285453af9f2f4bf31d330293635c97af232
SHA256a3e11d48ce3c4b9ef5b2acb0afc2a25e1a9e28aae934a2340e019e1fb34ef868
SHA512959788a918544268020b1096da4b73ade98d068f906626dfaa50594d8fee51fd99945ee9a9b0f39b5e232f8cfeef7217391be434e5432d32c550ce851a131cd8
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Filesize
20.8MB
MD5fca43a513f65b0d0176b6b9f5fcc6139
SHA148ec0285453af9f2f4bf31d330293635c97af232
SHA256a3e11d48ce3c4b9ef5b2acb0afc2a25e1a9e28aae934a2340e019e1fb34ef868
SHA512959788a918544268020b1096da4b73ade98d068f906626dfaa50594d8fee51fd99945ee9a9b0f39b5e232f8cfeef7217391be434e5432d32c550ce851a131cd8