Analysis
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max time kernel
109s -
max time network
125s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220112 -
submitted
19/01/2022, 02:35
Static task
static1
Behavioral task
behavioral1
Sample
52db9c20a7e362af2fd93800154e761a7fbc7253b9c97d77ec2df6c6e691e0c2.xll
Resource
win10v2004-en-20220112
General
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Target
52db9c20a7e362af2fd93800154e761a7fbc7253b9c97d77ec2df6c6e691e0c2.xll
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Size
1.7MB
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MD5
77461abc7157340cedea763e2813c965
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SHA1
f842ba990c8df5f05d11d00873cbc5c0e082dff4
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SHA256
52db9c20a7e362af2fd93800154e761a7fbc7253b9c97d77ec2df6c6e691e0c2
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SHA512
0ce714c92719788605b4b8d7cb27b481963ce9a6084af183e75a246bc23d0fab65dc86fc395aa46d1ec8b47e0c9cfda7a0efd63dc9af865ce2bfd9668cb5b456
Malware Config
Extracted
Signatures
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Bazar Loader
Detected loader normally used to deploy BazarBackdoor malware.
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Process spawned unexpected child process 1 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
description pid pid_target Process procid_target Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 2936 3748 rundll32.exe 50 -
Bazar/Team9 Loader payload 1 IoCs
resource yara_rule behavioral1/memory/2936-952-0x0000000180000000-0x000000018003C000-memory.dmp BazarLoaderVar5 -
Loads dropped DLL 3 IoCs
pid Process 3748 EXCEL.EXE 3748 EXCEL.EXE 2936 rundll32.exe -
Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString EXCEL.EXE -
Enumerates system info in registry 2 TTPs 3 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU EXCEL.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 3748 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 8 IoCs
pid Process 3748 EXCEL.EXE 3748 EXCEL.EXE 3748 EXCEL.EXE 3748 EXCEL.EXE 3748 EXCEL.EXE 3748 EXCEL.EXE 3748 EXCEL.EXE 3748 EXCEL.EXE -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 3748 wrote to memory of 2936 3748 EXCEL.EXE 55 PID 3748 wrote to memory of 2936 3748 EXCEL.EXE 55
Processes
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C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\52db9c20a7e362af2fd93800154e761a7fbc7253b9c97d77ec2df6c6e691e0c2.xll"1⤵
- Loads dropped DLL
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3748 -
C:\Windows\SYSTEM32\rundll32.exerundll32 C:\Users\Admin\JavaObjectReflectW.dll , dopt2⤵
- Process spawned unexpected child process
- Loads dropped DLL
PID:2936
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