Analysis
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max time kernel
91s -
max time network
102s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
01-07-2022 08:25
Static task
static1
Behavioral task
behavioral1
Sample
d9jkma1x16dzlm900ggg.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
d9jkma1x16dzlm900ggg.exe
Resource
win10v2004-20220414-en
Behavioral task
behavioral3
Sample
nbigdxqqfu.dll
Resource
win7-20220414-en
General
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Target
nbigdxqqfu.dll
-
Size
8.4MB
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MD5
3a2ba549d59aa944f20df5dbbc70827c
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SHA1
b6f0863186b3dee82abdd2806a7313645d4908fc
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SHA256
2cea1385ca83dbc79de55e3aca99f02f2f10a46122956d27346bac0cd23dbc76
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SHA512
c9c4cad12a64969c5ca678b7d3b328fe1d7ff1e3866daf86f5720ed864169f4660c4143bbc84206bd8a64cc2db1327b094e6d87683bb06702e87c9c87e6f8639
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 -
Processes:
resource yara_rule behavioral4/memory/4316-132-0x0000000002B00000-0x000000000411A000-memory.dmp themida behavioral4/memory/4316-133-0x0000000002B00000-0x000000000411A000-memory.dmp themida behavioral4/memory/4316-134-0x0000000002B00000-0x000000000411A000-memory.dmp themida behavioral4/memory/4316-135-0x0000000002B00000-0x000000000411A000-memory.dmp themida behavioral4/memory/4316-136-0x0000000002B00000-0x000000000411A000-memory.dmp themida behavioral4/memory/4316-137-0x0000000002B00000-0x000000000411A000-memory.dmp themida behavioral4/memory/4316-138-0x0000000002B00000-0x000000000411A000-memory.dmp themida behavioral4/memory/4316-139-0x0000000002B00000-0x000000000411A000-memory.dmp themida behavioral4/memory/4316-140-0x0000000002B00000-0x000000000411A000-memory.dmp themida behavioral4/memory/4316-141-0x0000000002B00000-0x000000000411A000-memory.dmp themida -
Processes:
rundll32.exedescription ioc process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA rundll32.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
Processes:
rundll32.exepid process 4316 rundll32.exe -
Program crash 1 IoCs
Processes:
WerFault.exepid pid_target process target process 3296 4316 WerFault.exe rundll32.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
rundll32.exedescription pid process target process PID 724 wrote to memory of 4316 724 rundll32.exe rundll32.exe PID 724 wrote to memory of 4316 724 rundll32.exe rundll32.exe PID 724 wrote to memory of 4316 724 rundll32.exe rundll32.exe
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\nbigdxqqfu.dll,#11⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\nbigdxqqfu.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
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4316 -s 7563⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4316 -ip 43161⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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memory/4316-130-0x0000000000000000-mapping.dmp
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memory/4316-131-0x0000000077BE0000-0x0000000077D83000-memory.dmpFilesize
1.6MB
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memory/4316-132-0x0000000002B00000-0x000000000411A000-memory.dmpFilesize
22.1MB
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memory/4316-133-0x0000000002B00000-0x000000000411A000-memory.dmpFilesize
22.1MB
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memory/4316-134-0x0000000002B00000-0x000000000411A000-memory.dmpFilesize
22.1MB
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memory/4316-135-0x0000000002B00000-0x000000000411A000-memory.dmpFilesize
22.1MB
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memory/4316-136-0x0000000002B00000-0x000000000411A000-memory.dmpFilesize
22.1MB
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memory/4316-137-0x0000000002B00000-0x000000000411A000-memory.dmpFilesize
22.1MB
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memory/4316-138-0x0000000002B00000-0x000000000411A000-memory.dmpFilesize
22.1MB
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memory/4316-139-0x0000000002B00000-0x000000000411A000-memory.dmpFilesize
22.1MB
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memory/4316-140-0x0000000002B00000-0x000000000411A000-memory.dmpFilesize
22.1MB
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memory/4316-141-0x0000000002B00000-0x000000000411A000-memory.dmpFilesize
22.1MB
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memory/4316-142-0x0000000077BE0000-0x0000000077D83000-memory.dmpFilesize
1.6MB