Analysis
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max time kernel
150s -
max time network
152s -
platform
windows10_x64 -
resource
win10-en-20211208 -
submitted
19/01/2022, 01:07
Static task
static1
Behavioral task
behavioral1
Sample
b9161245a81bdee1f12e09a4a66abb8ec219f10a4fbfa2023dcf2ca4a2ab7114.xll
Resource
win10-en-20211208
General
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Target
b9161245a81bdee1f12e09a4a66abb8ec219f10a4fbfa2023dcf2ca4a2ab7114.xll
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Size
1.7MB
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MD5
f75225bfef07aa3184aa677b61520bd3
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SHA1
dc32f7bdb0fb5c76df8dd1a235ef9c0f85138af6
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SHA256
b9161245a81bdee1f12e09a4a66abb8ec219f10a4fbfa2023dcf2ca4a2ab7114
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SHA512
08c3c4c7e9674cbc14a6ed456c6778dc527dc905300e14bd990be73eccc890ce60b7f7d39c41a8e6da659efa3d1b3b671b5cdf30aa7fbc5d5b495b334017824e
Malware Config
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 2128 3812 rundll32.exe 68 -
Bazar/Team9 Loader payload 1 IoCs
resource yara_rule behavioral1/memory/2128-259-0x0000000180000000-0x000000018003C000-memory.dmp BazarLoaderVar5 -
Blocklisted process makes network request 3 IoCs
flow pid Process 47 2128 rundll32.exe 50 2128 rundll32.exe 51 2128 rundll32.exe -
Loads dropped DLL 3 IoCs
pid Process 3812 EXCEL.EXE 3812 EXCEL.EXE 2128 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 3812 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 8 IoCs
pid Process 3812 EXCEL.EXE 3812 EXCEL.EXE 3812 EXCEL.EXE 3812 EXCEL.EXE 3812 EXCEL.EXE 3812 EXCEL.EXE 3812 EXCEL.EXE 3812 EXCEL.EXE -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 3812 wrote to memory of 2128 3812 EXCEL.EXE 70 PID 3812 wrote to memory of 2128 3812 EXCEL.EXE 70
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\b9161245a81bdee1f12e09a4a66abb8ec219f10a4fbfa2023dcf2ca4a2ab7114.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:3812 -
C:\Windows\SYSTEM32\rundll32.exerundll32 C:\Users\Admin\JavaObjectReflectiveH.dll , dopt2⤵
- Process spawned unexpected child process
- Blocklisted process makes network request
- Loads dropped DLL
PID:2128
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