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General
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Target
NEAS.2023-09-05_2356fb2385810d3d38ab438830843003_ryuk_JC.exe
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Size
20.8MB
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Sample
231031-1bxp3sgb45
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MD5
2356fb2385810d3d38ab438830843003
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SHA1
1f94cbdcea8d883d618a14af3fb9e822767b9427
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SHA256
25bcc469bb6cfbfa8ac29620ed013c37a5ab0ee6278faecf83d553a21af32cb5
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SHA512
1ab6313d8a2151c74da07dedc255e5cc7f1f117fc61f7f969451f63c54b01e1bef00d521d374df269cbe91ac5d879efc64f3343dfe9ac9b0206c127e0138442d
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SSDEEP
98304:9E2RpMMHMMMvMMZMMMlmMMMiMMMYJMMHMMM6MMZMMMqNMMzMMMUMMVMMMYJMMzMc:9nwngnwnBRt
Static task
static1
Behavioral task
behavioral1
Sample
NEAS.2023-09-05_2356fb2385810d3d38ab438830843003_ryuk_JC.exe
Resource
win7-20231020-en
Behavioral task
behavioral2
Sample
NEAS.2023-09-05_2356fb2385810d3d38ab438830843003_ryuk_JC.exe
Resource
win10v2004-20231023-en
Malware Config
Targets
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Target
NEAS.2023-09-05_2356fb2385810d3d38ab438830843003_ryuk_JC.exe
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Size
20.8MB
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MD5
2356fb2385810d3d38ab438830843003
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SHA1
1f94cbdcea8d883d618a14af3fb9e822767b9427
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SHA256
25bcc469bb6cfbfa8ac29620ed013c37a5ab0ee6278faecf83d553a21af32cb5
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SHA512
1ab6313d8a2151c74da07dedc255e5cc7f1f117fc61f7f969451f63c54b01e1bef00d521d374df269cbe91ac5d879efc64f3343dfe9ac9b0206c127e0138442d
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SSDEEP
98304:9E2RpMMHMMMvMMZMMMlmMMMiMMMYJMMHMMM6MMZMMMqNMMzMMMUMMVMMMYJMMzMc:9nwngnwnBRt
Score10/10-
Modifies WinLogon for persistence
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Renames multiple (108) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Renames multiple (93) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Drops startup file
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Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
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Drops autorun.inf file
Malware can abuse Windows Autorun to spread further via attached volumes.
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Drops file in System32 directory
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