Analysis
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max time kernel
146s -
max time network
133s -
platform
windows7_x64 -
resource
win7-20230831-en -
resource tags
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submitted
12/10/2023, 01:39
General
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Target
2023-08-26_35e95418bc721c5096b1830b8f78e245_ryuk_JC.exe
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Size
9.3MB
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MD5
35e95418bc721c5096b1830b8f78e245
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SHA1
478880196c8fe0df73901ff6bd7634132f551a01
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SHA256
8185a930fc728601eeecefbed85746f24bd90ab43d1be39e8e9441b160dffac1
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SHA512
224b4630682c4093980225ce353d1166545c42a964cf5a6199aa7b851e4de17d2dbc37427a1aa1a383ca77531af0d3238cfc8a0e7904013899e1808ddf5258bf
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SSDEEP
98304:9E2RpMMHMMMvMMZMMMlmMMMiMMMYJMMHMMM6MMZMMMqNMMzMMMUMMVMMMYJMMzMY:9nwnX
Malware Config
Signatures
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Modifies WinLogon for persistence 2 TTPs 1 IoCs
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Drops startup file 2 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 3 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 behavior: EnumeratesProcesses 1 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\2023-08-26_35e95418bc721c5096b1830b8f78e245_ryuk_JC.exe"C:\Users\Admin\AppData\Local\Temp\2023-08-26_35e95418bc721c5096b1830b8f78e245_ryuk_JC.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 behavior: EnumeratesProcesses
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
9.3MB
MD5e161096f43775bfa6580393ddd3ff71f
SHA1dcbacbbfd7eb1011b44d271c300b5a017a254886
SHA256769d064c03331e9fe798e0a953e9acd5a2cb768abb3f216fe9c8226b270aecad
SHA512ac48577c8d2583614a3f238197b28d47c4456a5ac320c2a14c349780649030a25ddf1671175c30de01b9a54e43e30f2188fbcc80a52fcb3262cd6a92349c55f9
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Filesize
10.1MB
MD585c51c93894517e985b7ca5af207e268
SHA1682b2b6e47ec79bd6af1fbf3d740f02266cb0c86
SHA256157616b50164e20f8eea5311cd3b3d9e2a8b12e68a4990e207172c8e11cf4d18
SHA512fb3684f0ff0d13c163ba30dd2485c41bf9e383c7c72527e358ac6e03deb422264b927a9ce2282b0c2a8ee1aae4a82c390c3142f537de12d645bb59efa1dbaab3
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Filesize
1KB
MD5de741ff762f2077d559402c27a5758f2
SHA114add5b60eb73462201a7c19fae119869fde5b12
SHA2568954cdb5191a05127cf5e995414a3013f4666baa61e4b3d41347dc06a5cefd49
SHA5122c51b8a6bd582fa19a6955775461d26e6ee6e0a0e08f826f1fecb96f4de7cbb3d3c19b9ef36f827021ee27aa661d3358b5c64797b0db9604d1ef90020b3728a4
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Filesize
145B
MD5ca13857b2fd3895a39f09d9dde3cca97
SHA18b78c5b2ec97c372ebdcef92d14b0998f8dd6dd0
SHA256cfe448b4506a95b33b529efa88f1ac704d8bdf98a941c065650ead27609318ae
SHA51255e5b5325968d1e5314527fb2d26012f5aae4a1c38e305417be273400cb1c6d0c22b85bddb501d7a5720a3f53bb5caf6ada8a7894232344c4f6c6ef85d226b47
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Filesize
492KB
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Filesize
4KB
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Filesize
492KB
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Filesize
4KB