Analysis
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max time kernel
144s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220112 -
submitted
19/01/2022, 10:58
Static task
static1
Behavioral task
behavioral1
Sample
FF-1642589841.xll
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
FF-1642589841.xll
Resource
win10v2004-en-20220112
General
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Target
FF-1642589841.xll
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Size
1.7MB
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MD5
f113fd9a32bdff6c4a90a0ccd905fd97
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SHA1
c3edf7f63f3e65fef0ddf17e47d6d048ba3ee4d7
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SHA256
465f6c30e884e9422573f39388e9aff5709c40301baf83369bffac32a797bb4d
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SHA512
84f4355a0ee609df9b84f37d4a6ffff1d8dfd0637823c41e7d3a5d8991efd2d55a04d92a1455ceacb0e04b8283f2ba8504b9ad8eb9bf75f2430bf0e228f1a560
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 3272 3708 rundll32.exe 50 -
Bazar/Team9 Loader payload 1 IoCs
resource yara_rule behavioral2/memory/3272-152-0x0000000180000000-0x000000018003C000-memory.dmp BazarLoaderVar5 -
Blocklisted process makes network request 1 IoCs
flow pid Process 38 3272 rundll32.exe -
Loads dropped DLL 3 IoCs
pid Process 3708 EXCEL.EXE 3708 EXCEL.EXE 3272 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 3708 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 8 IoCs
pid Process 3708 EXCEL.EXE 3708 EXCEL.EXE 3708 EXCEL.EXE 3708 EXCEL.EXE 3708 EXCEL.EXE 3708 EXCEL.EXE 3708 EXCEL.EXE 3708 EXCEL.EXE -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 3708 wrote to memory of 3272 3708 EXCEL.EXE 54 PID 3708 wrote to memory of 3272 3708 EXCEL.EXE 54
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\FF-1642589841.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:3708 -
C:\Windows\SYSTEM32\rundll32.exerundll32 C:\Users\Admin\JavaObjectReflectH.dll , dopt2⤵
- Process spawned unexpected child process
- Blocklisted process makes network request
- Loads dropped DLL
PID:3272
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