Analysis
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max time kernel
133s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220112 -
submitted
19/01/2022, 12:16
Static task
static1
Behavioral task
behavioral1
Sample
628430a43571477dd00085cdcdaa9a834e030cb80e39ae19b6a107c1f904e2cf.xll
Resource
win10v2004-en-20220112
General
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Target
628430a43571477dd00085cdcdaa9a834e030cb80e39ae19b6a107c1f904e2cf.xll
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Size
1.7MB
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MD5
b93d82f11a5e25f636292756755dcb34
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SHA1
f4f73365f963e1ff660647ea5fec64183232a359
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SHA256
628430a43571477dd00085cdcdaa9a834e030cb80e39ae19b6a107c1f904e2cf
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SHA512
cb20f48d26c57cdc7a24db0fbd77ad7fd4f94ae5bbc6a7a740284efe111fae1cc719c88c874b5651c6e13a7166cc5cbd21f6bc8d4ea02b98b83cc48d523a204e
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 452 416 rundll32.exe 51 -
Bazar/Team9 Loader payload 1 IoCs
resource yara_rule behavioral1/memory/452-152-0x0000000180000000-0x000000018003C000-memory.dmp BazarLoaderVar5 -
Blocklisted process makes network request 2 IoCs
flow pid Process 30 452 rundll32.exe 34 452 rundll32.exe -
Loads dropped DLL 3 IoCs
pid Process 416 EXCEL.EXE 416 EXCEL.EXE 452 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 416 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 8 IoCs
pid Process 416 EXCEL.EXE 416 EXCEL.EXE 416 EXCEL.EXE 416 EXCEL.EXE 416 EXCEL.EXE 416 EXCEL.EXE 416 EXCEL.EXE 416 EXCEL.EXE -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 416 wrote to memory of 452 416 EXCEL.EXE 53 PID 416 wrote to memory of 452 416 EXCEL.EXE 53
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\628430a43571477dd00085cdcdaa9a834e030cb80e39ae19b6a107c1f904e2cf.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:416 -
C:\Windows\SYSTEM32\rundll32.exerundll32 C:\Users\Admin\JavaObjectReflectiveO.dll , dopt2⤵
- Process spawned unexpected child process
- Blocklisted process makes network request
- Loads dropped DLL
PID:452
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