Analysis
- max time kernel
40s - max time network
41s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
03/10/2026, 15:54
General
- Target steamclient.dll
- Size 6.7MB
- Sample261003-tcd6sssamd
- SHA256 e4f4b71eebe895db1fedbed1a23344e53f4b9b5cd345faa82b74d9f5f2cafb6f
Malware Config
Signatures
- Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
- Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
- Checks whether UAC is enabled 1 TTPs 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 1 TTPs 1 IoCs
- System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 1 IoCs
Processes
-
C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\steamclient.dll,#11⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\steamclient.dll,#12⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
memory/1720-0-0x0000000072D50000-0x00000000752F9000-memory.dmp
memory/1720-1-0x0000000072D50000-0x00000000752F9000-memory.dmp
memory/1720-2-0x0000000072D50000-0x00000000752F9000-memory.dmp
memory/1720-5-0x0000000072D50000-0x00000000752F9000-memory.dmp
memory/1720-7-0x0000000072D50000-0x00000000752F9000-memory.dmp
memory/1720-8-0x0000000072D50000-0x00000000752F9000-memory.dmp
memory/1720-9-0x0000000072D50000-0x00000000752F9000-memory.dmp
memory/1720-15-0x000000007338E000-0x000000007338F000-memory.dmp
memory/1720-13-0x0000000072D50000-0x00000000752F9000-memory.dmp
memory/1720-14-0x0000000072D50000-0x00000000752F9000-memory.dmp
memory/1720-16-0x0000000072D50000-0x00000000752F9000-memory.dmp
memory/1720-12-0x0000000072D50000-0x00000000752F9000-memory.dmp
memory/1720-11-0x0000000072D50000-0x00000000752F9000-memory.dmp
memory/1720-6-0x0000000072D50000-0x00000000752F9000-memory.dmp
memory/1720-4-0x0000000072D50000-0x00000000752F9000-memory.dmp
memory/1720-3-0x0000000072D50000-0x00000000752F9000-memory.dmp
memory/1720-10-0x0000000072D50000-0x00000000752F9000-memory.dmp
memory/1720-20-0x0000000072D50000-0x00000000752F9000-memory.dmp