Analysis
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max time kernel
152s -
max time network
45s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system -
submitted
03-12-2022 19:01
Static task
static1
Behavioral task
behavioral1
Sample
ef4498460b299442b3000c4aebda7449e86c8a371507613209580e5fc9cb0b56.exe
Resource
win7-20220812-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
ef4498460b299442b3000c4aebda7449e86c8a371507613209580e5fc9cb0b56.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
ef4498460b299442b3000c4aebda7449e86c8a371507613209580e5fc9cb0b56.exe
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Size
160KB
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MD5
0fc1cf3f85574010a23f7c53f1d3e174
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SHA1
93be5d7cb5e53afef37986d3240e072d01d68ce6
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SHA256
ef4498460b299442b3000c4aebda7449e86c8a371507613209580e5fc9cb0b56
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SHA512
3c3d6f2efae3a2d4ce532c4b0da534da771fbb49717e39b42055399bebdbb28e7ca5045da3f3937a6c63bc66a5fa9362247a9f91ca5baf104a18f8b1020e9561
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SSDEEP
3072:p6kT5dapGlY0wRmWOl5i6wJjHQgQzEIbdt:p7VdVFwRmWcuad
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-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" ef4498460b299442b3000c4aebda7449e86c8a371507613209580e5fc9cb0b56.exe Set value (int) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" bcvok.exe -
Executes dropped EXE 1 IoCs
pid Process 1124 bcvok.exe -
Loads dropped DLL 2 IoCs
pid Process 1620 ef4498460b299442b3000c4aebda7449e86c8a371507613209580e5fc9cb0b56.exe 1620 ef4498460b299442b3000c4aebda7449e86c8a371507613209580e5fc9cb0b56.exe -
Adds Run key to start application 2 TTPs 52 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /l" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /r" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /T" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /y" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /S" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /X" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /P" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /Y" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /F" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /x" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /V" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /z" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /w" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /f" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /v" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /E" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /Q" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /t" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /I" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /L" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /l" ef4498460b299442b3000c4aebda7449e86c8a371507613209580e5fc9cb0b56.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /K" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /o" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /m" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /k" bcvok.exe Key created \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\ bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /G" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /J" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /d" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /R" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /i" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /B" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /b" bcvok.exe Key created \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\ ef4498460b299442b3000c4aebda7449e86c8a371507613209580e5fc9cb0b56.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /h" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /U" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /Z" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /D" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /g" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /C" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /H" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /s" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /A" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /c" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /W" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /M" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /n" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /j" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /a" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /p" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /O" bcvok.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcvok = "C:\\Users\\Admin\\bcvok.exe /e" bcvok.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 1620 ef4498460b299442b3000c4aebda7449e86c8a371507613209580e5fc9cb0b56.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe 1124 bcvok.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 1620 ef4498460b299442b3000c4aebda7449e86c8a371507613209580e5fc9cb0b56.exe 1124 bcvok.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 1620 wrote to memory of 1124 1620 ef4498460b299442b3000c4aebda7449e86c8a371507613209580e5fc9cb0b56.exe 27 PID 1620 wrote to memory of 1124 1620 ef4498460b299442b3000c4aebda7449e86c8a371507613209580e5fc9cb0b56.exe 27 PID 1620 wrote to memory of 1124 1620 ef4498460b299442b3000c4aebda7449e86c8a371507613209580e5fc9cb0b56.exe 27 PID 1620 wrote to memory of 1124 1620 ef4498460b299442b3000c4aebda7449e86c8a371507613209580e5fc9cb0b56.exe 27
Processes
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C:\Users\Admin\AppData\Local\Temp\ef4498460b299442b3000c4aebda7449e86c8a371507613209580e5fc9cb0b56.exe"C:\Users\Admin\AppData\Local\Temp\ef4498460b299442b3000c4aebda7449e86c8a371507613209580e5fc9cb0b56.exe"1⤵
- Modifies visiblity of hidden/system files in Explorer
- Loads dropped DLL
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1620 -
C:\Users\Admin\bcvok.exe"C:\Users\Admin\bcvok.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:1124
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
160KB
MD5125326b444e084ce42b85ab16ef330ae
SHA136abf20ddbd395e42e05fc051b25d4a7d280b753
SHA2562a8d397e2451bfd70939b36553d61ebb716091b194186b1834cf2afed500c36b
SHA51235ee5a768fe391199841a047e69b2bb2cadd3758adf6683e0eaa734724880969e10aee318afef9badcfa8ebe02a7d83d043c9a0520241fda3a54761752219036
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Filesize
160KB
MD5125326b444e084ce42b85ab16ef330ae
SHA136abf20ddbd395e42e05fc051b25d4a7d280b753
SHA2562a8d397e2451bfd70939b36553d61ebb716091b194186b1834cf2afed500c36b
SHA51235ee5a768fe391199841a047e69b2bb2cadd3758adf6683e0eaa734724880969e10aee318afef9badcfa8ebe02a7d83d043c9a0520241fda3a54761752219036
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Filesize
160KB
MD5125326b444e084ce42b85ab16ef330ae
SHA136abf20ddbd395e42e05fc051b25d4a7d280b753
SHA2562a8d397e2451bfd70939b36553d61ebb716091b194186b1834cf2afed500c36b
SHA51235ee5a768fe391199841a047e69b2bb2cadd3758adf6683e0eaa734724880969e10aee318afef9badcfa8ebe02a7d83d043c9a0520241fda3a54761752219036
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Filesize
160KB
MD5125326b444e084ce42b85ab16ef330ae
SHA136abf20ddbd395e42e05fc051b25d4a7d280b753
SHA2562a8d397e2451bfd70939b36553d61ebb716091b194186b1834cf2afed500c36b
SHA51235ee5a768fe391199841a047e69b2bb2cadd3758adf6683e0eaa734724880969e10aee318afef9badcfa8ebe02a7d83d043c9a0520241fda3a54761752219036