Analysis
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max time kernel
150s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
01/12/2022, 23:55
Static task
static1
Behavioral task
behavioral1
Sample
7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe
Resource
win7-20220812-en
windows7-x64
11 signatures
150 seconds
Behavioral task
behavioral2
Sample
7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
11 signatures
150 seconds
General
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Target
7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe
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Size
88KB
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MD5
44f40f34501d69bf603c17056cca92c0
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SHA1
eced9b71c5768775ef486878a976f2e941f610bf
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SHA256
7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee
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SHA512
3584cdfb3c517d65bfb36dc315b3ac389c3a08f3ff640088b7cfeaab704a676b789f764ef892caabfedce34142fcde81b49e112d9aeb101e61065f6f4e1bebde
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SSDEEP
1536:TX/07OM/lnd4RLVwEuAcLqW7yTUPUiLgWBtFvkLaHk9wm4uN8Rf:M/lneqEuAceGyGpLZBtZjKBnyRf
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-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" 7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe Set value (int) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" muioy.exe -
Executes dropped EXE 2 IoCs
pid Process 396 muioy.exe 1368 muioy.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation 7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe -
Adds Run key to start application 2 TTPs 29 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /z" muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /e" muioy.exe Key created \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run\ 7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /t" 7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /a" muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /x" muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /q" muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /v" muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /l" muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /r" muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /k" muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /s" muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /c" muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /h" muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /i" muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /t" muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /d" muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /y" muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /n" muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /b" muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /j" muioy.exe Key created \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run\ muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /m" muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /u" muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /f" muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /g" muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /w" muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /p" muioy.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\muioy = "C:\\Users\\Admin\\muioy.exe /o" muioy.exe -
Maps connected drives based on registry 3 TTPs 4 IoCs
Disk information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0 muioy.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum 7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0 7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum muioy.exe -
Drops autorun.inf file 1 TTPs 1 IoCs
Malware can abuse Windows Autorun to spread further via attached volumes.
description ioc Process File opened for modification C:\Users\Admin\c\autorun.inf muioy.exe -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 4800 set thread context of 4736 4800 7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe 80 PID 396 set thread context of 1368 396 muioy.exe 82 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 4736 7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe 4736 7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe 1368 muioy.exe -
Suspicious use of SetWindowsHookEx 4 IoCs
pid Process 4800 7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe 4736 7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe 396 muioy.exe 1368 muioy.exe -
Suspicious use of WriteProcessMemory 21 IoCs
description pid Process procid_target PID 4800 wrote to memory of 4736 4800 7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe 80 PID 4800 wrote to memory of 4736 4800 7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe 80 PID 4800 wrote to memory of 4736 4800 7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe 80 PID 4800 wrote to memory of 4736 4800 7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe 80 PID 4800 wrote to memory of 4736 4800 7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe 80 PID 4800 wrote to memory of 4736 4800 7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe 80 PID 4800 wrote to memory of 4736 4800 7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe 80 PID 4800 wrote to memory of 4736 4800 7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe 80 PID 4800 wrote to memory of 4736 4800 7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe 80 PID 4736 wrote to memory of 396 4736 7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe 81 PID 4736 wrote to memory of 396 4736 7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe 81 PID 4736 wrote to memory of 396 4736 7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe 81 PID 396 wrote to memory of 1368 396 muioy.exe 82 PID 396 wrote to memory of 1368 396 muioy.exe 82 PID 396 wrote to memory of 1368 396 muioy.exe 82 PID 396 wrote to memory of 1368 396 muioy.exe 82 PID 396 wrote to memory of 1368 396 muioy.exe 82 PID 396 wrote to memory of 1368 396 muioy.exe 82 PID 396 wrote to memory of 1368 396 muioy.exe 82 PID 396 wrote to memory of 1368 396 muioy.exe 82 PID 396 wrote to memory of 1368 396 muioy.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe"C:\Users\Admin\AppData\Local\Temp\7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4800 -
C:\Users\Admin\AppData\Local\Temp\7220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee.exe712⤵
- Modifies visiblity of hidden/system files in Explorer
- Checks computer location settings
- Adds Run key to start application
- Maps connected drives based on registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4736 -
C:\Users\Admin\muioy.exe"C:\Users\Admin\muioy.exe"3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:396 -
C:\Users\Admin\muioy.exe714⤵
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- Adds Run key to start application
- Maps connected drives based on registry
- Drops autorun.inf file
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:1368
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
88KB
MD544f40f34501d69bf603c17056cca92c0
SHA1eced9b71c5768775ef486878a976f2e941f610bf
SHA2567220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee
SHA5123584cdfb3c517d65bfb36dc315b3ac389c3a08f3ff640088b7cfeaab704a676b789f764ef892caabfedce34142fcde81b49e112d9aeb101e61065f6f4e1bebde
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Filesize
88KB
MD544f40f34501d69bf603c17056cca92c0
SHA1eced9b71c5768775ef486878a976f2e941f610bf
SHA2567220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee
SHA5123584cdfb3c517d65bfb36dc315b3ac389c3a08f3ff640088b7cfeaab704a676b789f764ef892caabfedce34142fcde81b49e112d9aeb101e61065f6f4e1bebde
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Filesize
88KB
MD544f40f34501d69bf603c17056cca92c0
SHA1eced9b71c5768775ef486878a976f2e941f610bf
SHA2567220b4bf35a7a481d598ca89afd7256ad78b6eb2313628ccd0fe7b42c76ebbee
SHA5123584cdfb3c517d65bfb36dc315b3ac389c3a08f3ff640088b7cfeaab704a676b789f764ef892caabfedce34142fcde81b49e112d9aeb101e61065f6f4e1bebde