Analysis
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max time kernel
51s -
max time network
57s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
13-06-2024 15:25
Static task
static1
Behavioral task
behavioral1
Sample
steamclient.dll
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
steamclient.dll
Resource
win10v2004-20240508-en
General
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Target
steamclient.dll
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Size
5.7MB
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MD5
c324c4fa89de0ad6c8ccd120b7763509
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SHA1
3e9e7ba51c449d138363447caab319c98b33c1f7
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SHA256
bcb4ccca0f0cadacb290f13f1a1b96a5c387955815e2741a13e73408f15b67a4
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SHA512
4bf262dfcd91a7f78c35082ce008acff650fa5d0d6494a6da8f637e1fa88ceee0591d0a7c7201ec7f0946bcee89d329955c5a89902e1ff445ce40b9820e09a7d
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SSDEEP
98304:FZesCuKF4kRvLeuQB7pdCgwuT2OcoD7YefRfLSME+WpHOvLZwUN9HDA/B:X3ClWkJLF+7pkgXiWYefxLE+a0vNuZ
Malware Config
Signatures
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Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
Processes:
rundll32.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ rundll32.exe -
Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
Processes:
rundll32.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion rundll32.exe -
Identifies Wine through registry keys 2 TTPs 1 IoCs
Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.
Processes:
rundll32.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Software\Wine rundll32.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
Processes:
rundll32.exepid process 4100 rundll32.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
rundll32.exepid process 4100 rundll32.exe 4100 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
rundll32.exedescription pid process Token: SeDebugPrivilege 4100 rundll32.exe Token: SeDebugPrivilege 4100 rundll32.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
rundll32.exedescription pid process target process PID 2520 wrote to memory of 4100 2520 rundll32.exe rundll32.exe PID 2520 wrote to memory of 4100 2520 rundll32.exe rundll32.exe PID 2520 wrote to memory of 4100 2520 rundll32.exe rundll32.exe
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\steamclient.dll,#11⤵
- Suspicious use of WriteProcessMemory
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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
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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memory/4100-0-0x0000000073500000-0x0000000075557000-memory.dmpFilesize
32.3MB
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memory/4100-1-0x0000000077AF4000-0x0000000077AF6000-memory.dmpFilesize
8KB
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memory/4100-2-0x0000000073501000-0x0000000073903000-memory.dmpFilesize
4.0MB
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memory/4100-3-0x0000000073500000-0x0000000075557000-memory.dmpFilesize
32.3MB
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memory/4100-4-0x0000000073500000-0x0000000075557000-memory.dmpFilesize
32.3MB