Analysis
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max time kernel
150s -
max time network
44s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system -
submitted
02/12/2022, 00:26
Static task
static1
Behavioral task
behavioral1
Sample
982c9b4433a74a177275185249438ced101a086e58dc13c80f196f3dd8a27765.exe
Resource
win7-20220812-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
982c9b4433a74a177275185249438ced101a086e58dc13c80f196f3dd8a27765.exe
Resource
win10v2004-20220901-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
982c9b4433a74a177275185249438ced101a086e58dc13c80f196f3dd8a27765.exe
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Size
200KB
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MD5
670e7ba325b462f960cd0f5b56354916
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SHA1
0e3287287e39fa0c570204599bc37269419518aa
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SHA256
982c9b4433a74a177275185249438ced101a086e58dc13c80f196f3dd8a27765
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SHA512
d9d25506072fc6323d719c9863b0755c90571411f3b76f8ae890be8ddb9b30a6c827330d157a60cd66a1b713ddf033651e5c48af83fcbae00da38659af667593
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SSDEEP
3072:CLv6LHJdkvY2+ydeYMvnWtmpzaVmS4plDuUhMjn:ovadkgM03utmQt4n7+
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" yoikuo.exe Set value (int) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" 982c9b4433a74a177275185249438ced101a086e58dc13c80f196f3dd8a27765.exe -
Executes dropped EXE 1 IoCs
pid Process 1348 yoikuo.exe -
Loads dropped DLL 2 IoCs
pid Process 1668 982c9b4433a74a177275185249438ced101a086e58dc13c80f196f3dd8a27765.exe 1668 982c9b4433a74a177275185249438ced101a086e58dc13c80f196f3dd8a27765.exe -
Adds Run key to start application 2 TTPs 29 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /y" yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /c" yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /s" yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /l" yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /o" yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /k" yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /p" yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /h" yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /n" 982c9b4433a74a177275185249438ced101a086e58dc13c80f196f3dd8a27765.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /g" yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /z" yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /a" yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /u" yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /r" yoikuo.exe Key created \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\ 982c9b4433a74a177275185249438ced101a086e58dc13c80f196f3dd8a27765.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /v" yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /q" yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /t" yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /i" yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /f" yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /d" yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /m" yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /e" yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /b" yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /j" yoikuo.exe Key created \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\ yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /w" yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /x" yoikuo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\yoikuo = "C:\\Users\\Admin\\yoikuo.exe /n" yoikuo.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 1668 982c9b4433a74a177275185249438ced101a086e58dc13c80f196f3dd8a27765.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe 1348 yoikuo.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 1668 982c9b4433a74a177275185249438ced101a086e58dc13c80f196f3dd8a27765.exe 1348 yoikuo.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 1668 wrote to memory of 1348 1668 982c9b4433a74a177275185249438ced101a086e58dc13c80f196f3dd8a27765.exe 27 PID 1668 wrote to memory of 1348 1668 982c9b4433a74a177275185249438ced101a086e58dc13c80f196f3dd8a27765.exe 27 PID 1668 wrote to memory of 1348 1668 982c9b4433a74a177275185249438ced101a086e58dc13c80f196f3dd8a27765.exe 27 PID 1668 wrote to memory of 1348 1668 982c9b4433a74a177275185249438ced101a086e58dc13c80f196f3dd8a27765.exe 27
Processes
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C:\Users\Admin\AppData\Local\Temp\982c9b4433a74a177275185249438ced101a086e58dc13c80f196f3dd8a27765.exe"C:\Users\Admin\AppData\Local\Temp\982c9b4433a74a177275185249438ced101a086e58dc13c80f196f3dd8a27765.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:1668 -
C:\Users\Admin\yoikuo.exe"C:\Users\Admin\yoikuo.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:1348
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
200KB
MD553d79feccb3cc4823ca4df9f9b913cb8
SHA17d6e3a8992afc247e54120caaec2a639a88678e5
SHA25688f923ac89ad87c7d2dda43ecb97c022e461ca61b2e564d8018e44fea443744d
SHA512383a1acd1c62ad274f640ce3ac5eadf43affcfbfd983888aebca2732a6181df784a165d1d203373476cbf6f310d6117af6aa00aaf4365a362824c1a935b14c81
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Filesize
200KB
MD553d79feccb3cc4823ca4df9f9b913cb8
SHA17d6e3a8992afc247e54120caaec2a639a88678e5
SHA25688f923ac89ad87c7d2dda43ecb97c022e461ca61b2e564d8018e44fea443744d
SHA512383a1acd1c62ad274f640ce3ac5eadf43affcfbfd983888aebca2732a6181df784a165d1d203373476cbf6f310d6117af6aa00aaf4365a362824c1a935b14c81
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Filesize
200KB
MD553d79feccb3cc4823ca4df9f9b913cb8
SHA17d6e3a8992afc247e54120caaec2a639a88678e5
SHA25688f923ac89ad87c7d2dda43ecb97c022e461ca61b2e564d8018e44fea443744d
SHA512383a1acd1c62ad274f640ce3ac5eadf43affcfbfd983888aebca2732a6181df784a165d1d203373476cbf6f310d6117af6aa00aaf4365a362824c1a935b14c81
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Filesize
200KB
MD553d79feccb3cc4823ca4df9f9b913cb8
SHA17d6e3a8992afc247e54120caaec2a639a88678e5
SHA25688f923ac89ad87c7d2dda43ecb97c022e461ca61b2e564d8018e44fea443744d
SHA512383a1acd1c62ad274f640ce3ac5eadf43affcfbfd983888aebca2732a6181df784a165d1d203373476cbf6f310d6117af6aa00aaf4365a362824c1a935b14c81