Analysis
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max time kernel
149s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220113 -
submitted
19/01/2022, 04:26
Static task
static1
Behavioral task
behavioral1
Sample
f983a109d3d2856794352c36289e6f34f0f55420acfdc196ec9c75095eb79c90.xll
Resource
win10v2004-en-20220113
General
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Target
f983a109d3d2856794352c36289e6f34f0f55420acfdc196ec9c75095eb79c90.xll
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Size
1.7MB
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MD5
e476534e17521b823794d3cc338da3e5
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SHA1
f26daa812ee01d3c5b6cb3412248107ad5b8253d
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SHA256
f983a109d3d2856794352c36289e6f34f0f55420acfdc196ec9c75095eb79c90
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SHA512
32a37814a8110da741386b4aba804002eadbdea1390961bc291acfda709c8d0e0644b68e228d35d828f2b916fbd21b3e4bb2acde2c7ff2a66fc7292462c4d7ae
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 2932 1432 rundll32.exe 51 -
Bazar/Team9 Loader payload 1 IoCs
resource yara_rule behavioral1/memory/2932-154-0x0000000180000000-0x000000018003C000-memory.dmp BazarLoaderVar5 -
Blocklisted process makes network request 2 IoCs
flow pid Process 36 2932 rundll32.exe 39 2932 rundll32.exe -
Loads dropped DLL 3 IoCs
pid Process 1432 EXCEL.EXE 1432 EXCEL.EXE 2932 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 1432 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 8 IoCs
pid Process 1432 EXCEL.EXE 1432 EXCEL.EXE 1432 EXCEL.EXE 1432 EXCEL.EXE 1432 EXCEL.EXE 1432 EXCEL.EXE 1432 EXCEL.EXE 1432 EXCEL.EXE -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 1432 wrote to memory of 2932 1432 EXCEL.EXE 58 PID 1432 wrote to memory of 2932 1432 EXCEL.EXE 58
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\f983a109d3d2856794352c36289e6f34f0f55420acfdc196ec9c75095eb79c90.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:1432 -
C:\Windows\SYSTEM32\rundll32.exerundll32 C:\Users\Admin\JavaObjectReflectO.dll , dopt2⤵
- Process spawned unexpected child process
- Blocklisted process makes network request
- Loads dropped DLL
PID:2932
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