Analysis
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max time kernel
152s -
max time network
158s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220113 -
submitted
19/01/2022, 09:55
Static task
static1
Behavioral task
behavioral1
Sample
4507c736a5aa8756e4ae1f5a43f16fffbf1f8536cde0f450eb2fb8e9edf68142.xll
Resource
win10v2004-en-20220113
General
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Target
4507c736a5aa8756e4ae1f5a43f16fffbf1f8536cde0f450eb2fb8e9edf68142.xll
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Size
1.7MB
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MD5
5a0e926c464b2ca981fefa8f4b6216f6
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SHA1
e8bff4f832a2826b5479ada18cedb7ccd12dbac0
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SHA256
4507c736a5aa8756e4ae1f5a43f16fffbf1f8536cde0f450eb2fb8e9edf68142
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SHA512
1b5410ad5d99e87fa1673f9c99c3c3c2deb3768e358ea4faefccdbfbf5d7a9a8c5b5d446cbe8dfa4307ee51d648771f5a26ceaf39167a03c36d1e46150de1060
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 1724 2700 rundll32.exe 50 -
Bazar/Team9 Loader payload 1 IoCs
resource yara_rule behavioral1/memory/1724-152-0x0000000180000000-0x000000018003C000-memory.dmp BazarLoaderVar5 -
Blocklisted process makes network request 1 IoCs
flow pid Process 31 1724 rundll32.exe -
Loads dropped DLL 3 IoCs
pid Process 2700 EXCEL.EXE 2700 EXCEL.EXE 1724 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 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 Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 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 2700 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 8 IoCs
pid Process 2700 EXCEL.EXE 2700 EXCEL.EXE 2700 EXCEL.EXE 2700 EXCEL.EXE 2700 EXCEL.EXE 2700 EXCEL.EXE 2700 EXCEL.EXE 2700 EXCEL.EXE -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 2700 wrote to memory of 1724 2700 EXCEL.EXE 52 PID 2700 wrote to memory of 1724 2700 EXCEL.EXE 52
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\4507c736a5aa8756e4ae1f5a43f16fffbf1f8536cde0f450eb2fb8e9edf68142.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:2700 -
C:\Windows\SYSTEM32\rundll32.exerundll32 C:\Users\Admin\JavaObjectReflectA.dll , dopt2⤵
- Process spawned unexpected child process
- Blocklisted process makes network request
- Loads dropped DLL
PID:1724
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