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Analysis
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max time kernel
115s -
max time network
156s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
19/03/2024, 17:26
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
d6b3a5bfe9dd5d995109042507d83f6b.exe
Resource
win7-20231129-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
d6b3a5bfe9dd5d995109042507d83f6b.exe
Resource
win10v2004-20240226-en
windows10-2004-x64
9 signatures
150 seconds
General
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Target
d6b3a5bfe9dd5d995109042507d83f6b.exe
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Size
220KB
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MD5
d6b3a5bfe9dd5d995109042507d83f6b
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SHA1
4d2aa29b5dbc281551e2ae452963c519f2030580
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SHA256
23e3a74910e4ec43356db8b37524373a1687c901e55ac3452480769ec90d88de
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SHA512
6266f92c992c22aac8cf34bf89ca95627a284c05b5b16c487d3d8e878c4f9ea6107dc2adceba9d8e2cf5056d372c7b8a2f7ef13656fbf65eb18851137b382953
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SSDEEP
3072:Njwsq8qGAALc3uk85gVzaSCz7TG2KAikGFH+anvjW/JOGb:twXHGPL8uXgzqmhBi/Jj
Score
10/10
Malware Config
Signatures
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Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" d6b3a5bfe9dd5d995109042507d83f6b.exe Set value (int) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" rbyuw.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation d6b3a5bfe9dd5d995109042507d83f6b.exe -
Executes dropped EXE 1 IoCs
pid Process 3052 rbyuw.exe -
Adds Run key to start application 2 TTPs 27 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /t" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /u" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /w" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /r" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /b" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /a" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /f" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /j" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /z" d6b3a5bfe9dd5d995109042507d83f6b.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /o" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /d" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /e" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /h" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /p" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /l" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /v" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /s" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /x" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /y" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /g" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /c" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /n" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /k" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /m" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /z" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /q" rbyuw.exe Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rbyuw = "C:\\Users\\Admin\\rbyuw.exe /i" rbyuw.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000_Classes\Local Settings d6b3a5bfe9dd5d995109042507d83f6b.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 3916 d6b3a5bfe9dd5d995109042507d83f6b.exe 3916 d6b3a5bfe9dd5d995109042507d83f6b.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe 3052 rbyuw.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 3916 d6b3a5bfe9dd5d995109042507d83f6b.exe 3052 rbyuw.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 3916 wrote to memory of 3052 3916 d6b3a5bfe9dd5d995109042507d83f6b.exe 93 PID 3916 wrote to memory of 3052 3916 d6b3a5bfe9dd5d995109042507d83f6b.exe 93 PID 3916 wrote to memory of 3052 3916 d6b3a5bfe9dd5d995109042507d83f6b.exe 93
Processes
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C:\Users\Admin\AppData\Local\Temp\d6b3a5bfe9dd5d995109042507d83f6b.exe"C:\Users\Admin\AppData\Local\Temp\d6b3a5bfe9dd5d995109042507d83f6b.exe"1⤵
- Modifies visiblity of hidden/system files in Explorer
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3916 -
C:\Users\Admin\rbyuw.exe"C:\Users\Admin\rbyuw.exe"2⤵
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:3052
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C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵PID:4812
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
220KB
MD5d6b3a5bfe9dd5d995109042507d83f6b
SHA14d2aa29b5dbc281551e2ae452963c519f2030580
SHA25623e3a74910e4ec43356db8b37524373a1687c901e55ac3452480769ec90d88de
SHA5126266f92c992c22aac8cf34bf89ca95627a284c05b5b16c487d3d8e878c4f9ea6107dc2adceba9d8e2cf5056d372c7b8a2f7ef13656fbf65eb18851137b382953