Analysis
- max time kernel
148s - max time network
126s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
- submitted
23/07/2026, 10:01
General
- Target osu!AerisSetup.exe
- Size 8.0MB
- Sample260723-l2jhtabe44
- SHA256 0dafb664a0a0b9f1d69409d266a687a199808f3c58b7f7257d8b1761d73aed2b
Malware Config
Signatures
- Executes dropped EXE 2 IoCs
- Loads dropped DLL 4 IoCs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Costura .NET executable packer 1 IoCs
Costura packer aka Costura Fody, is an add-in for the .NET framework that embeds all external dependency .dll files as resources inside main executable.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Inno Setup is an open-source installation builder for Windows applications. 3 IoCs
Inno Setup installer
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of WriteProcessMemory 2 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\osu!AerisSetup.exe"C:\Users\Admin\AppData\Local\Temp\osu!AerisSetup.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-QN33IDWCOO.tmp\osu!AerisSetup.tmp"C:\Users\Admin\AppData\Local\Temp\is-QN33IDWCOO.tmp\osu!AerisSetup.tmp" /SL5="$400B0,7133786,1012224,C:\Users\Admin\AppData\Local\Temp\osu!AerisSetup.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\osu!Aeris\osu!.exe"C:\Users\Admin\AppData\Local\osu!Aeris\osu!.exe" -go3⤵
- Executes dropped EXE
- Loads dropped DLL
-
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
osu!AerisSetup.tmp
osu!.Game.dll
osu!.deps.json
osu!.dll
osu!.exe
osu!.runtimeconfig.json
memory/2580-8-0x0000000000B20000-0x0000000000C26000-memory.dmp
memory/2580-0-0x0000000000B20000-0x0000000000C26000-memory.dmp
memory/2580-53-0x0000000000B20000-0x0000000000C26000-memory.dmp
memory/3320-12-0x0000000000680000-0x0000000000AE1000-memory.dmp
memory/3320-10-0x0000000002E10000-0x0000000002E11000-memory.dmp
memory/3320-9-0x0000000000680000-0x0000000000AE1000-memory.dmp
memory/3320-6-0x0000000002E10000-0x0000000002E11000-memory.dmp
memory/3320-50-0x0000000000680000-0x0000000000AE1000-memory.dmp