Analysis
- max time kernel
152s - max time network
156s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
31/03/2024, 05:22
General
- Target 2024-03-31_100c9800e2965ea2362c8d9cf6ba33eb_ryuk.exe
- Size 4.9MB
- Sample240331-f2rarsfa57
- SHA256 978b11eb0242d5d22561d050efd5e7d092437290b1df02874191813a45ab90a1
Malware Config
Signatures
- Modifies firewall policy service 2 TTPs 6 IoCs
- Deletes itself 1 IoCs
- Executes dropped EXE 1 IoCs
- Modifies registry class 2 IoCs
- Suspicious behavior: RenamesItself 1 IoCs
- Suspicious use of AdjustPrivilegeToken 6 IoCs
- Suspicious use of SetWindowsHookEx 2 IoCs
- Suspicious use of WriteProcessMemory 2 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-03-31_100c9800e2965ea2362c8d9cf6ba33eb_ryuk.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-31_100c9800e2965ea2362c8d9cf6ba33eb_ryuk.exe"1⤵
- Modifies firewall policy service
- Modifies registry class
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\2024-03-31_100c9800e2965ea2362c8d9cf6ba33eb_ryuk.exe"2024-03-31_100c9800e2965ea2362c8d9cf6ba33eb_ryuk.exe"2⤵
- Modifies firewall policy service
- Deletes itself
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
-
-
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4168 --field-trial-handle=2284,i,15722001240173834669,15048020084704567542,262144 --variations-seed-version /prefetch:81⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
2024-03-31_100c9800e2965ea2362c8d9cf6ba33eb_ryuk.exe
user.dat
memory/1632-8-0x00000191E3AA0000-0x00000191E3F97000-memory.dmp
memory/1632-9-0x00000191E3AA0000-0x00000191E3F97000-memory.dmp
memory/1632-4-0x00000191E3AA0000-0x00000191E3F97000-memory.dmp
memory/1632-5-0x00000191E3AA0000-0x00000191E3F97000-memory.dmp
memory/1632-6-0x00000191E3AA0000-0x00000191E3F97000-memory.dmp
memory/1632-7-0x00000191E3AA0000-0x00000191E3F97000-memory.dmp
memory/1632-2-0x00000191E3AA0000-0x00000191E3F97000-memory.dmp
memory/1632-3-0x00000191E3AA0000-0x00000191E3F97000-memory.dmp
memory/1632-10-0x00000191E3AA0000-0x00000191E3F97000-memory.dmp
memory/1632-11-0x00000191E3AA0000-0x00000191E3F97000-memory.dmp
memory/1632-12-0x00000191E3AA0000-0x00000191E3F97000-memory.dmp
memory/1632-13-0x00000191E3AA0000-0x00000191E3F97000-memory.dmp
memory/1632-17-0x00000191E3AA0000-0x00000191E3F97000-memory.dmp
memory/1632-20-0x00007FF6A08D0000-0x00007FF6A0DC4000-memory.dmp
memory/1632-0-0x00000191E3AA0000-0x00000191E3F97000-memory.dmp
memory/1632-1-0x00000191E3AA0000-0x00000191E3F97000-memory.dmp
memory/4468-19-0x000001BC6DA20000-0x000001BC6DF1C000-memory.dmp
memory/4468-23-0x000001BC6DA20000-0x000001BC6DF1C000-memory.dmp
memory/4468-25-0x000001BC6DA20000-0x000001BC6DF1C000-memory.dmp
memory/4468-24-0x000001BC6DA20000-0x000001BC6DF1C000-memory.dmp
memory/4468-22-0x000001BC6DA20000-0x000001BC6DF1C000-memory.dmp
memory/4468-26-0x000001BC6DA20000-0x000001BC6DF1C000-memory.dmp
memory/4468-27-0x000001BC6DA20000-0x000001BC6DF1C000-memory.dmp
memory/4468-28-0x000001BC6DA20000-0x000001BC6DF1C000-memory.dmp
memory/4468-21-0x000001BC6DA20000-0x000001BC6DF1C000-memory.dmp
memory/4468-30-0x000001BC6DA20000-0x000001BC6DF1C000-memory.dmp
memory/4468-32-0x000001BC6DA20000-0x000001BC6DF1C000-memory.dmp
memory/4468-33-0x000001BC6DA20000-0x000001BC6DF1C000-memory.dmp
memory/4468-34-0x000001BC6DA20000-0x000001BC6DF1C000-memory.dmp
memory/4468-36-0x00007FF704BC0000-0x00007FF7050B6000-memory.dmp
memory/4468-39-0x000001BC6DA20000-0x000001BC6DF1C000-memory.dmp