Analysis
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max time kernel
93s -
max time network
97s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
23/12/2023, 01:18
General
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Target
Prax.dll
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Size
5.4MB
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MD5
ad6bf6c37d545b51df1ae3670f911020
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SHA1
fc32a802c09a4d91257edaf993f5d0f65d368d04
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SHA256
6b03618ea53f12d9ce51476599362e5f503b3a020f22b80dd2ad7d1be4b5add5
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SHA512
a90e08e457aaebd68915627c8aae5ad4e2626f712cc10578cd3ffd97e358c98ad36f8226068bf0343e1b5d9bdb2dda52d52bb526827d63671836569d626a7adb
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SSDEEP
98304:Ro+ZRKELs7IM7RnLYQQaLZBKSFE0aypzLUbfkKLjowtgPrILFfrN1mwb:9KYWIARnkQQaPKSFE05JUbsKvNe4D6wb
Malware Config
Signatures
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Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ rundll32.exe -
Blocklisted process makes network request 2 IoCs
flow pid Process 25 2480 rundll32.exe 26 2480 rundll32.exe -
Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion rundll32.exe -
resource yara_rule behavioral1/memory/2480-0-0x00007FF958900000-0x00007FF9596E3000-memory.dmp themida behavioral1/memory/2480-2-0x00007FF958900000-0x00007FF9596E3000-memory.dmp themida behavioral1/memory/2480-3-0x00007FF958900000-0x00007FF9596E3000-memory.dmp themida behavioral1/memory/2480-4-0x00007FF958900000-0x00007FF9596E3000-memory.dmp themida behavioral1/memory/2480-5-0x00007FF958900000-0x00007FF9596E3000-memory.dmp themida behavioral1/memory/2480-6-0x00007FF958900000-0x00007FF9596E3000-memory.dmp themida behavioral1/memory/2480-7-0x00007FF958900000-0x00007FF9596E3000-memory.dmp themida behavioral1/memory/2480-8-0x00007FF958900000-0x00007FF9596E3000-memory.dmp themida -
description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA rundll32.exe -
Legitimate hosting services abused for malware hosting/C2 1 TTPs
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Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
pid Process 2480 rundll32.exe
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\Prax.dll,#11⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Blocklisted process makes network request
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
PID:2480