Analysis
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max time kernel
143s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220112 -
submitted
19/01/2022, 16:28
Static task
static1
Behavioral task
behavioral1
Sample
113fa9ae34480ab1f6b091d8928b9716a4e7dffeb3c9c47129ed249af762b47a.xll
Resource
win10v2004-en-20220112
General
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Target
113fa9ae34480ab1f6b091d8928b9716a4e7dffeb3c9c47129ed249af762b47a.xll
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Size
1.7MB
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MD5
b47c88fd74a78d1125de7b06893861c0
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SHA1
6751d6a7b3e9b274a7b91c5ace5e0300eb5b7fe7
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SHA256
113fa9ae34480ab1f6b091d8928b9716a4e7dffeb3c9c47129ed249af762b47a
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SHA512
198d1ea049a7b929a409f3d6f33312233016fdee3e4a964dc48cd613fbd2c8eb4a5b9bc1a29d2f2eb178a4c7be023c70b108c10ef39857e8980e42e248b757dc
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 3552 3220 rundll32.exe 51 -
Bazar/Team9 Loader payload 1 IoCs
resource yara_rule behavioral1/memory/3552-157-0x0000000180000000-0x000000018003C000-memory.dmp BazarLoaderVar5 -
Blocklisted process makes network request 2 IoCs
flow pid Process 56 3552 rundll32.exe 57 3552 rundll32.exe -
Loads dropped DLL 3 IoCs
pid Process 3220 EXCEL.EXE 3220 EXCEL.EXE 3552 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 3220 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 8 IoCs
pid Process 3220 EXCEL.EXE 3220 EXCEL.EXE 3220 EXCEL.EXE 3220 EXCEL.EXE 3220 EXCEL.EXE 3220 EXCEL.EXE 3220 EXCEL.EXE 3220 EXCEL.EXE -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 3220 wrote to memory of 3552 3220 EXCEL.EXE 60 PID 3220 wrote to memory of 3552 3220 EXCEL.EXE 60
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\113fa9ae34480ab1f6b091d8928b9716a4e7dffeb3c9c47129ed249af762b47a.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:3220 -
C:\Windows\SYSTEM32\rundll32.exerundll32 C:\Users\Admin\JavaObjectReflectD.dll , dopt2⤵
- Process spawned unexpected child process
- Blocklisted process makes network request
- Loads dropped DLL
PID:3552
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation -p1⤵PID:3936