Analysis
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max time kernel
152s -
max time network
48s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system -
submitted
30-10-2022 20:02
Static task
static1
Behavioral task
behavioral1
Sample
b4f8d752f46ddae98e3f5e83329b5f6aa1c17c22a59bda6c8c5e3bf6713e05e2.exe
Resource
win7-20220812-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
b4f8d752f46ddae98e3f5e83329b5f6aa1c17c22a59bda6c8c5e3bf6713e05e2.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
b4f8d752f46ddae98e3f5e83329b5f6aa1c17c22a59bda6c8c5e3bf6713e05e2.exe
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Size
260KB
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MD5
a1d70650b0247293705b2994585f09c0
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SHA1
49ba3cdc210933b6ad8a944666e7884969c4cf04
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SHA256
b4f8d752f46ddae98e3f5e83329b5f6aa1c17c22a59bda6c8c5e3bf6713e05e2
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SHA512
a00718501098631c816896eae8fa61004bf3519deeac7ab658816e32aeb7e0776d564fb53310099880f66e7ba30a8253457324a7ac9c54928f058bac5f653cdd
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SSDEEP
3072:bgfAlNommvh25n/kZoSUjMqXnpWAkpAmTSrMaIOYt/jo7LAtPhjjtZnfHFEoWBf3:bdrgTSrMaIl/jcLijfHFEHWzXvjT85R
Score
10/10
Malware Config
Signatures
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Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 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" siiyo.exe -
Executes dropped EXE 1 IoCs
pid Process 1892 siiyo.exe -
Loads dropped DLL 2 IoCs
pid Process 1492 b4f8d752f46ddae98e3f5e83329b5f6aa1c17c22a59bda6c8c5e3bf6713e05e2.exe 1492 b4f8d752f46ddae98e3f5e83329b5f6aa1c17c22a59bda6c8c5e3bf6713e05e2.exe -
Adds Run key to start application 2 TTPs 50 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /z" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /G" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /p" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /X" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /d" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /b" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /Z" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /S" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /N" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /I" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /Q" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /u" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /P" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /r" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /J" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /h" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /V" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /A" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /e" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /w" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /g" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /n" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /i" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /H" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /j" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /K" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /q" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /m" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /y" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /T" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /t" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /R" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /U" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /L" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /k" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /F" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /f" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /l" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /x" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /s" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /M" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /D" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /a" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /C" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /Y" siiyo.exe Key created \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\ siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /B" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /v" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /o" siiyo.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\siiyo = "C:\\Users\\Admin\\siiyo.exe /W" siiyo.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 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe 1892 siiyo.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 1492 b4f8d752f46ddae98e3f5e83329b5f6aa1c17c22a59bda6c8c5e3bf6713e05e2.exe 1892 siiyo.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 1492 wrote to memory of 1892 1492 b4f8d752f46ddae98e3f5e83329b5f6aa1c17c22a59bda6c8c5e3bf6713e05e2.exe 28 PID 1492 wrote to memory of 1892 1492 b4f8d752f46ddae98e3f5e83329b5f6aa1c17c22a59bda6c8c5e3bf6713e05e2.exe 28 PID 1492 wrote to memory of 1892 1492 b4f8d752f46ddae98e3f5e83329b5f6aa1c17c22a59bda6c8c5e3bf6713e05e2.exe 28 PID 1492 wrote to memory of 1892 1492 b4f8d752f46ddae98e3f5e83329b5f6aa1c17c22a59bda6c8c5e3bf6713e05e2.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\b4f8d752f46ddae98e3f5e83329b5f6aa1c17c22a59bda6c8c5e3bf6713e05e2.exe"C:\Users\Admin\AppData\Local\Temp\b4f8d752f46ddae98e3f5e83329b5f6aa1c17c22a59bda6c8c5e3bf6713e05e2.exe"1⤵
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1492 -
C:\Users\Admin\siiyo.exe"C:\Users\Admin\siiyo.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:1892
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
260KB
MD53c46ed0fabd7731e086dd945f1de8a74
SHA1e0a32750f009a981ffe2cf6bbdd10ecbe46f5d0c
SHA25683b19dd626895c738549df990bf3c33f4eca7a0a83b579e3e3a88863bc7dc4f7
SHA5126b7c37ef1249897e2dc5d698494bc5019455d8b6034943f732fe0db09f7d7c5251d1a8596dac6d06008c47fae08e4fc013145b084373e84bc61d53a4cd66877e
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Filesize
260KB
MD53c46ed0fabd7731e086dd945f1de8a74
SHA1e0a32750f009a981ffe2cf6bbdd10ecbe46f5d0c
SHA25683b19dd626895c738549df990bf3c33f4eca7a0a83b579e3e3a88863bc7dc4f7
SHA5126b7c37ef1249897e2dc5d698494bc5019455d8b6034943f732fe0db09f7d7c5251d1a8596dac6d06008c47fae08e4fc013145b084373e84bc61d53a4cd66877e
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Filesize
260KB
MD53c46ed0fabd7731e086dd945f1de8a74
SHA1e0a32750f009a981ffe2cf6bbdd10ecbe46f5d0c
SHA25683b19dd626895c738549df990bf3c33f4eca7a0a83b579e3e3a88863bc7dc4f7
SHA5126b7c37ef1249897e2dc5d698494bc5019455d8b6034943f732fe0db09f7d7c5251d1a8596dac6d06008c47fae08e4fc013145b084373e84bc61d53a4cd66877e
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Filesize
260KB
MD53c46ed0fabd7731e086dd945f1de8a74
SHA1e0a32750f009a981ffe2cf6bbdd10ecbe46f5d0c
SHA25683b19dd626895c738549df990bf3c33f4eca7a0a83b579e3e3a88863bc7dc4f7
SHA5126b7c37ef1249897e2dc5d698494bc5019455d8b6034943f732fe0db09f7d7c5251d1a8596dac6d06008c47fae08e4fc013145b084373e84bc61d53a4cd66877e