Analysis
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max time kernel
139s -
max time network
132s -
platform
windows10_x64 -
resource
win10v20201028 -
submitted
08-04-2021 06:31
Behavioral task
behavioral1
Sample
document-550193913.xls
Resource
win7v20201028
Behavioral task
behavioral2
Sample
document-550193913.xls
Resource
win10v20201028
General
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Target
document-550193913.xls
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Size
91KB
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MD5
4107cd071635b4cc3689f77c688f57c3
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SHA1
cf6dea64431b614757906f32d3d1f016b5afdbb5
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SHA256
d49b40d468269f57fb87ea6ad7fd8bb303fbeb033dbd45fb4967c34c5dfbc2ed
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SHA512
ae568d93ef0c9cea430e18bdf5a27cb5e71fe2e13cfca9c508f196aead42d7a1e68dd863587a0549391b7c08af85de9e6db574c9d819422482ed6529df52c0fb
Malware Config
Signatures
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Process spawned unexpected child process 1 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
Processes:
rundll32.exedescription pid pid_target process target process Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 1552 816 rundll32.exe EXCEL.EXE -
Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
EXCEL.EXEdescription 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
Processes:
EXCEL.EXEdescription 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
Processes:
EXCEL.EXEpid process 816 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 12 IoCs
Processes:
EXCEL.EXEpid process 816 EXCEL.EXE 816 EXCEL.EXE 816 EXCEL.EXE 816 EXCEL.EXE 816 EXCEL.EXE 816 EXCEL.EXE 816 EXCEL.EXE 816 EXCEL.EXE 816 EXCEL.EXE 816 EXCEL.EXE 816 EXCEL.EXE 816 EXCEL.EXE -
Suspicious use of WriteProcessMemory 2 IoCs
Processes:
EXCEL.EXEdescription pid process target process PID 816 wrote to memory of 1552 816 EXCEL.EXE rundll32.exe PID 816 wrote to memory of 1552 816 EXCEL.EXE rundll32.exe
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\document-550193913.xls"1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\rundll32.exerundll32 ..\rieuro.vnt,DllRegisterServer2⤵
- Process spawned unexpected child process
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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memory/816-2-0x00007FFB60CA0000-0x00007FFB60CB0000-memory.dmpFilesize
64KB
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memory/816-3-0x00007FFB60CA0000-0x00007FFB60CB0000-memory.dmpFilesize
64KB
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memory/816-4-0x00007FFB60CA0000-0x00007FFB60CB0000-memory.dmpFilesize
64KB
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memory/816-5-0x00007FFB60CA0000-0x00007FFB60CB0000-memory.dmpFilesize
64KB
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memory/816-6-0x00007FFB84DE0000-0x00007FFB85417000-memory.dmpFilesize
6.2MB
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memory/1552-7-0x0000000000000000-mapping.dmp