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Analysis
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max time kernel
153s -
max time network
157s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
20/10/2022, 22:24
Static task
static1
Behavioral task
behavioral1
Sample
3f8b56fe4dcc2ebf24260dc3b7479571c2912f16f857ccaf35043eb6bc8fcb5c.exe
Resource
win7-20220901-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
3f8b56fe4dcc2ebf24260dc3b7479571c2912f16f857ccaf35043eb6bc8fcb5c.exe
Resource
win10v2004-20220901-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
3f8b56fe4dcc2ebf24260dc3b7479571c2912f16f857ccaf35043eb6bc8fcb5c.exe
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Size
132KB
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MD5
666acd3c0d7fd27c67d2c046699c9540
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SHA1
1878c29a9eca24e52ac3abf3853b7e28c2597c65
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SHA256
3f8b56fe4dcc2ebf24260dc3b7479571c2912f16f857ccaf35043eb6bc8fcb5c
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SHA512
394994a051efc7b2a95d706c0a2bee25568793cc221790f55752b6a4eb72765eb1afd7be5a44b60d06a3c45f832132a8a3af038a4a1aa3f897a7f994eb94ced1
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SSDEEP
1536:1moaJeTlPbX9ixXVG4E2JUXJ3Ue05zn/bzPe9X7wo7JaSh:mJeTlL9ixFG4EU/bGLwQj
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-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" bchun.exe Set value (int) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" 3f8b56fe4dcc2ebf24260dc3b7479571c2912f16f857ccaf35043eb6bc8fcb5c.exe -
Executes dropped EXE 1 IoCs
pid Process 1560 bchun.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation 3f8b56fe4dcc2ebf24260dc3b7479571c2912f16f857ccaf35043eb6bc8fcb5c.exe -
Adds Run key to start application 2 TTPs 52 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run\ 3f8b56fe4dcc2ebf24260dc3b7479571c2912f16f857ccaf35043eb6bc8fcb5c.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /k" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /j" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /Y" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /B" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /z" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /Z" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /a" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /m" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /n" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /w" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /G" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /O" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /i" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /s" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /d" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /u" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /M" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /Z" 3f8b56fe4dcc2ebf24260dc3b7479571c2912f16f857ccaf35043eb6bc8fcb5c.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /J" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /F" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /P" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /Q" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /x" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /o" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /W" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /T" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /f" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /h" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /U" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /t" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /c" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /g" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /E" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /D" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /S" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /q" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /X" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /I" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /p" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /y" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /r" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /R" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /V" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /K" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /L" bchun.exe Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run\ bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /l" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /N" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /H" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /e" bchun.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bchun = "C:\\Users\\Admin\\bchun.exe /C" bchun.exe -
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 652 3f8b56fe4dcc2ebf24260dc3b7479571c2912f16f857ccaf35043eb6bc8fcb5c.exe 652 3f8b56fe4dcc2ebf24260dc3b7479571c2912f16f857ccaf35043eb6bc8fcb5c.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe 1560 bchun.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 652 3f8b56fe4dcc2ebf24260dc3b7479571c2912f16f857ccaf35043eb6bc8fcb5c.exe 1560 bchun.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 652 wrote to memory of 1560 652 3f8b56fe4dcc2ebf24260dc3b7479571c2912f16f857ccaf35043eb6bc8fcb5c.exe 84 PID 652 wrote to memory of 1560 652 3f8b56fe4dcc2ebf24260dc3b7479571c2912f16f857ccaf35043eb6bc8fcb5c.exe 84 PID 652 wrote to memory of 1560 652 3f8b56fe4dcc2ebf24260dc3b7479571c2912f16f857ccaf35043eb6bc8fcb5c.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\3f8b56fe4dcc2ebf24260dc3b7479571c2912f16f857ccaf35043eb6bc8fcb5c.exe"C:\Users\Admin\AppData\Local\Temp\3f8b56fe4dcc2ebf24260dc3b7479571c2912f16f857ccaf35043eb6bc8fcb5c.exe"1⤵
- Modifies visiblity of hidden/system files in Explorer
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:652 -
C:\Users\Admin\bchun.exe"C:\Users\Admin\bchun.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:1560
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
132KB
MD5adf565d19aa52855b5ab78bc2f33e78e
SHA11acfa0fc33a671efee0dc76ae27e753b2b00e655
SHA256e0660b3c45163c6a911e05e3524b9344a3520a0070e6d8512bb0020c210fa7bd
SHA5124dacf04acafe5710f872c5e8b98856e2f35693ba66d28ee74344dce519e1d0f1d9bb17e852a198e970b7a5fd6ca3d237e46ef8ee8022fdfc861a0a51a3a83f24
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Filesize
132KB
MD5adf565d19aa52855b5ab78bc2f33e78e
SHA11acfa0fc33a671efee0dc76ae27e753b2b00e655
SHA256e0660b3c45163c6a911e05e3524b9344a3520a0070e6d8512bb0020c210fa7bd
SHA5124dacf04acafe5710f872c5e8b98856e2f35693ba66d28ee74344dce519e1d0f1d9bb17e852a198e970b7a5fd6ca3d237e46ef8ee8022fdfc861a0a51a3a83f24