Analysis
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max time kernel
121s -
max time network
132s -
platform
windows10_x64 -
resource
win10-en-20211208 -
submitted
19/01/2022, 09:14
Static task
static1
Behavioral task
behavioral1
Sample
75cdb51337ba20c2f53bc8dac34e55678cc01b7698550ba91aaa3ce667af32c0.xll
Resource
win10-en-20211208
General
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Target
75cdb51337ba20c2f53bc8dac34e55678cc01b7698550ba91aaa3ce667af32c0.xll
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Size
1.7MB
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MD5
ae5c387389575adab73f177a746b1f7e
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SHA1
b3e56b3dabed8f748d6e94c91c9c2f43fb0ad784
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SHA256
75cdb51337ba20c2f53bc8dac34e55678cc01b7698550ba91aaa3ce667af32c0
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SHA512
2a45a1094746463274e86bd48bcf40e820a0d4d56fae35d74e493978b9835e7877c42ddde0da5b3bce7df42e49edd64dcd5b243459480c84f4e1149972a950d4
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 1944 2796 rundll32.exe 68 -
Bazar/Team9 Loader payload 1 IoCs
resource yara_rule behavioral1/memory/1944-259-0x0000000180000000-0x000000018003C000-memory.dmp BazarLoaderVar5 -
Loads dropped DLL 3 IoCs
pid Process 2796 EXCEL.EXE 2796 EXCEL.EXE 1944 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 value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU EXCEL.EXE Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS EXCEL.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2796 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 8 IoCs
pid Process 2796 EXCEL.EXE 2796 EXCEL.EXE 2796 EXCEL.EXE 2796 EXCEL.EXE 2796 EXCEL.EXE 2796 EXCEL.EXE 2796 EXCEL.EXE 2796 EXCEL.EXE -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 2796 wrote to memory of 1944 2796 EXCEL.EXE 70 PID 2796 wrote to memory of 1944 2796 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\75cdb51337ba20c2f53bc8dac34e55678cc01b7698550ba91aaa3ce667af32c0.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:2796 -
C:\Windows\SYSTEM32\rundll32.exerundll32 C:\Users\Admin\JavaObjectReflectB.dll , dopt2⤵
- Process spawned unexpected child process
- Loads dropped DLL
PID:1944
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