Analysis
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max time kernel
145s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220113 -
submitted
19/01/2022, 03:26
Static task
static1
Behavioral task
behavioral1
Sample
964e1ff84b5c231a5176e2e4425d1e8b9186f0b62c02d492505872d48f6dd58b.xll
Resource
win10v2004-en-20220113
General
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Target
964e1ff84b5c231a5176e2e4425d1e8b9186f0b62c02d492505872d48f6dd58b.xll
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Size
1.7MB
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MD5
f355eb875cebdf6418598393987aba03
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SHA1
558c007d1f4ae8e10d5216fec28d624f0097d31f
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SHA256
964e1ff84b5c231a5176e2e4425d1e8b9186f0b62c02d492505872d48f6dd58b
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SHA512
232964841b6deabf8fec36b5ccdd98f78a72a8cdda9ddc71fee5d7f4cee742049bd78e6b295c02d111ff1172022be8de8b79d07574ab5028ff22acf45e01644a
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 3560 2120 rundll32.exe 52 -
Bazar/Team9 Loader payload 1 IoCs
resource yara_rule behavioral1/memory/3560-152-0x0000000180000000-0x000000018003C000-memory.dmp BazarLoaderVar5 -
Blocklisted process makes network request 1 IoCs
flow pid Process 42 3560 rundll32.exe -
Loads dropped DLL 3 IoCs
pid Process 2120 EXCEL.EXE 2120 EXCEL.EXE 3560 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 2120 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 8 IoCs
pid Process 2120 EXCEL.EXE 2120 EXCEL.EXE 2120 EXCEL.EXE 2120 EXCEL.EXE 2120 EXCEL.EXE 2120 EXCEL.EXE 2120 EXCEL.EXE 2120 EXCEL.EXE -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 2120 wrote to memory of 3560 2120 EXCEL.EXE 57 PID 2120 wrote to memory of 3560 2120 EXCEL.EXE 57
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\964e1ff84b5c231a5176e2e4425d1e8b9186f0b62c02d492505872d48f6dd58b.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:2120 -
C:\Windows\SYSTEM32\rundll32.exerundll32 C:\Users\Admin\JavaObjectReflectiveI.dll , dopt2⤵
- Process spawned unexpected child process
- Blocklisted process makes network request
- Loads dropped DLL
PID:3560
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