Analysis
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max time kernel
6s -
max time network
138s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
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submitted
31-12-2023 16:45
General
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Target
2023-12-29_5d52e0e5d2e1c2955011dd585f0848ae_ryuk.exe
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Size
26.6MB
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MD5
5d52e0e5d2e1c2955011dd585f0848ae
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SHA1
7da00cb8fac2f21d495111c8754e7cd37f1540f3
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SHA256
64229251028e91c9b3a44e1a13f7fe2cdc036db7d3ef8b943dedb36d4549d3c0
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SHA512
e254e58aca8625d0cff2f829a49bdea1952c6010edec5a574bdd9cbfa72ecb525ed9fa66a34e0834000e051cf82ae6aa332d8405acb08e1f0eabcee435937887
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SSDEEP
98304:9E2RpMMHMMMvMMZMMMlmMMMiMMMYJMMHMMM6MMZMMMqNMMzMMMUMMVMMMYJMMzMr:9nwngnwnC
Score
10/10
Malware Config
Signatures
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Modifies WinLogon for persistence 2 TTPs 2 IoCs
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Drops startup file 1 IoCs
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Executes dropped EXE 1 IoCs
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Enumerates connected drives 3 TTPs 23 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
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Drops autorun.inf file 1 TTPs 2 IoCs
Malware can abuse Windows Autorun to spread further via attached volumes.
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Drops file in System32 directory 2 IoCs
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Drops file in Program Files directory 1 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of WriteProcessMemory 3 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\2023-12-29_5d52e0e5d2e1c2955011dd585f0848ae_ryuk.exe"C:\Users\Admin\AppData\Local\Temp\2023-12-29_5d52e0e5d2e1c2955011dd585f0848ae_ryuk.exe"1⤵
- Modifies WinLogon for persistence
- Drops startup file
- Enumerates connected drives
- Drops autorun.inf file
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\HelpMe.exeC:\Windows\system32\HelpMe.exe2⤵
- Modifies WinLogon for persistence
- Executes dropped EXE
- Drops file in System32 directory
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
492KB
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Filesize
4KB
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Filesize
492KB
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Filesize
4KB
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Filesize
4KB
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Filesize
492KB
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Filesize
4KB