Analysis
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max time kernel
162s -
max time network
194s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220113 -
submitted
20/01/2022, 08:02
Static task
static1
Behavioral task
behavioral1
Sample
f3bf04bfa6c87ee6e8f66fce0b5fac59.xll
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
f3bf04bfa6c87ee6e8f66fce0b5fac59.xll
Resource
win10v2004-en-20220113
General
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Target
f3bf04bfa6c87ee6e8f66fce0b5fac59.xll
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Size
1.7MB
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MD5
f3bf04bfa6c87ee6e8f66fce0b5fac59
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SHA1
ccd946fa6eed9551ac8f7f0139d8587bb878007e
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SHA256
2045ecc425209bfc5e090d868856afe74cf0cb13dc63f8a00b656aac3fe438ea
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SHA512
95eaeac78d60d5a920542286e70b82e268475f072d690c1b26b166cf7e4ade9f800c4ec911c002473281f2e002a47489cab333390952510db0a361563b65844a
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 1596 1164 rundll32.exe 52 -
Bazar/Team9 Loader payload 1 IoCs
resource yara_rule behavioral2/memory/1596-152-0x0000000180000000-0x000000018003C000-memory.dmp BazarLoaderVar5 -
Blocklisted process makes network request 3 IoCs
flow pid Process 42 1596 rundll32.exe 45 1596 rundll32.exe 46 1596 rundll32.exe -
Loads dropped DLL 3 IoCs
pid Process 1164 EXCEL.EXE 1164 EXCEL.EXE 1596 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 1164 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 8 IoCs
pid Process 1164 EXCEL.EXE 1164 EXCEL.EXE 1164 EXCEL.EXE 1164 EXCEL.EXE 1164 EXCEL.EXE 1164 EXCEL.EXE 1164 EXCEL.EXE 1164 EXCEL.EXE -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 1164 wrote to memory of 1596 1164 EXCEL.EXE 62 PID 1164 wrote to memory of 1596 1164 EXCEL.EXE 62
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\f3bf04bfa6c87ee6e8f66fce0b5fac59.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:1164 -
C:\Windows\SYSTEM32\rundll32.exerundll32 C:\Users\Admin\JavaObjectReflectiveT.dll , dopt2⤵
- Process spawned unexpected child process
- Blocklisted process makes network request
- Loads dropped DLL
PID:1596
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