Analysis
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max time kernel
149s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
26-02-2024 22:14
Behavioral task
behavioral1
Sample
b548389c0a77f5e77b0fe07725d79732e9c76162349b1f4dc506bdf29f96e511.xlsm
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
b548389c0a77f5e77b0fe07725d79732e9c76162349b1f4dc506bdf29f96e511.xlsm
Resource
win10v2004-20240226-en
General
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Target
b548389c0a77f5e77b0fe07725d79732e9c76162349b1f4dc506bdf29f96e511.xlsm
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Size
32KB
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MD5
d30f2b217f3ae3e8ac19c81129e7de3b
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SHA1
a7b076a6b84be14691e3071a219c7cbfce94adb0
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SHA256
b548389c0a77f5e77b0fe07725d79732e9c76162349b1f4dc506bdf29f96e511
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SHA512
8aaa87457c7c8b1c0087eb5abccd981238c386a34f76791b4e2908fa13b825a801c4ba6b87000a38912c50ef8d3b74ef0d341a673006f37b0764a3e39ecee4fb
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SSDEEP
384:wjzZPFhNjqEBOA7iEibbwBLg0SCdiVXUKgUrNU/qWhZOdBNPJM+kqr9eCgh0k5lY:wjpFhNNlizXT28dFfPdkqstJmE6/
Malware Config
Extracted
https://casache.com/web/n3jxwXXwa/
https://www.blessingsource.com/blessingsource.com/rFQ0Ip6lQXXK/
http://ccalaire.com/wp-admin/d1pGRa0X/
http://cdimprintpr.com/brochure2/A9NmYDndZ/
http://careerplan.host20.uk/images/Ls/
http://ausnz.net/2010wc/odSi5tQKkCIXEWl9/
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:
regsvr32.exedescription pid pid_target process target process Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 4092 1396 regsvr32.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 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 Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 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 1396 EXCEL.EXE -
Suspicious use of FindShellTrayWindow 2 IoCs
Processes:
EXCEL.EXEpid process 1396 EXCEL.EXE 1396 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 12 IoCs
Processes:
EXCEL.EXEpid process 1396 EXCEL.EXE 1396 EXCEL.EXE 1396 EXCEL.EXE 1396 EXCEL.EXE 1396 EXCEL.EXE 1396 EXCEL.EXE 1396 EXCEL.EXE 1396 EXCEL.EXE 1396 EXCEL.EXE 1396 EXCEL.EXE 1396 EXCEL.EXE 1396 EXCEL.EXE -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
EXCEL.EXEdescription pid process target process PID 1396 wrote to memory of 4092 1396 EXCEL.EXE regsvr32.exe PID 1396 wrote to memory of 4092 1396 EXCEL.EXE regsvr32.exe PID 1396 wrote to memory of 4092 1396 EXCEL.EXE regsvr32.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\b548389c0a77f5e77b0fe07725d79732e9c76162349b1f4dc506bdf29f96e511.xlsm"1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1396 -
C:\Windows\SysWow64\regsvr32.exeC:\Windows\SysWow64\regsvr32.exe -s ..\rfs.dll2⤵
- Process spawned unexpected child process
PID:4092
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
158KB
MD59928ddf89badc66b1ab8ae8fcbd86691
SHA102c8e7933524f390fb0f1ba9b1a2201114ba1d71
SHA256b37143a6c2132fd29f3910df27b2a8d34b659b32aecee3cdfaac4a66c7633ffc
SHA51258bc468a0f7a33a6210f5ce0f06321d43b36803affc7d1c756e26c6ac89c6fcf0995aec1a529d3583212e4983bbfa289a916f92186c9d8d011019239b8b3ae80