Analysis
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max time kernel
118s -
max time network
139s -
platform
windows10_x64 -
resource
win10-en-20211208 -
submitted
19/01/2022, 09:15
Static task
static1
Behavioral task
behavioral1
Sample
59136a8738af5783756405f46526e99f705dd94a14dd2629de96880814dacc0c.xll
Resource
win10-en-20211208
General
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Target
59136a8738af5783756405f46526e99f705dd94a14dd2629de96880814dacc0c.xll
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Size
1.7MB
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MD5
d9dc8d21d1b662803907276a1c131b2c
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SHA1
ad15b7c845390a2964af34255cf50db8c1c98a8e
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SHA256
59136a8738af5783756405f46526e99f705dd94a14dd2629de96880814dacc0c
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SHA512
680afcc6bd570457b5c146fb9812dbcdf07fc1990c928f5152ac509203accbc8c7e0c194bdd221ac1c01cd63a813218e5b003597293a5e8ddef0fe73a1daca1b
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 2316 1260 rundll32.exe 68 -
Bazar/Team9 Loader payload 1 IoCs
resource yara_rule behavioral1/memory/2316-259-0x0000000180000000-0x000000018003C000-memory.dmp BazarLoaderVar5 -
Blocklisted process makes network request 4 IoCs
flow pid Process 40 2316 rundll32.exe 44 2316 rundll32.exe 46 2316 rundll32.exe 47 2316 rundll32.exe -
Loads dropped DLL 3 IoCs
pid Process 1260 EXCEL.EXE 1260 EXCEL.EXE 2316 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 1260 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 8 IoCs
pid Process 1260 EXCEL.EXE 1260 EXCEL.EXE 1260 EXCEL.EXE 1260 EXCEL.EXE 1260 EXCEL.EXE 1260 EXCEL.EXE 1260 EXCEL.EXE 1260 EXCEL.EXE -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 1260 wrote to memory of 2316 1260 EXCEL.EXE 70 PID 1260 wrote to memory of 2316 1260 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\59136a8738af5783756405f46526e99f705dd94a14dd2629de96880814dacc0c.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:1260 -
C:\Windows\SYSTEM32\rundll32.exerundll32 C:\Users\Admin\JavaObjectReflectiveK.dll , dopt2⤵
- Process spawned unexpected child process
- Blocklisted process makes network request
- Loads dropped DLL
PID:2316
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