Analysis
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max time kernel
151s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
05/12/2022, 10:03
Static task
static1
Behavioral task
behavioral1
Sample
b45661bfcd3c9081db22ba55287cc6d9c3de788837542b0e000de347354c7600.exe
Resource
win7-20220812-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
b45661bfcd3c9081db22ba55287cc6d9c3de788837542b0e000de347354c7600.exe
Resource
win10v2004-20220901-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
b45661bfcd3c9081db22ba55287cc6d9c3de788837542b0e000de347354c7600.exe
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Size
360KB
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MD5
5990d596cbcb25a18ece5c5a297c00cb
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SHA1
05b08d1f62e145be70c1d69ce5c152665bb0780b
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SHA256
b45661bfcd3c9081db22ba55287cc6d9c3de788837542b0e000de347354c7600
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SHA512
8fa008dff87ac58eadf375b0f56a51050a6345445394c21fa59312f01e3b4f61af92ea156fc39de081eb2108457273ee270047c30eb59a5c2592d8662645b6c2
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SSDEEP
6144:uGTTeO46r4UZN6tj3tjuPQxD4b8/RqIsSp7ibSaZt/DIT4WT:OO4rUZN6tj99D4b8/EIsSp7ibSaZh0TN
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" b45661bfcd3c9081db22ba55287cc6d9c3de788837542b0e000de347354c7600.exe Set value (int) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" guiofi.exe -
Executes dropped EXE 1 IoCs
pid Process 3540 guiofi.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 b45661bfcd3c9081db22ba55287cc6d9c3de788837542b0e000de347354c7600.exe -
Adds Run key to start application 2 TTPs 29 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /k" guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /e" guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /y" guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /s" guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /a" guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /g" guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /x" guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /j" guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /z" guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /d" b45661bfcd3c9081db22ba55287cc6d9c3de788837542b0e000de347354c7600.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /c" guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /w" guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /r" guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /p" guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /u" guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /n" guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /v" guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /m" guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /f" guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /q" guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /t" guiofi.exe Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run\ b45661bfcd3c9081db22ba55287cc6d9c3de788837542b0e000de347354c7600.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /h" guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /i" guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /d" guiofi.exe Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run\ guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /l" guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /o" guiofi.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guiofi = "C:\\Users\\Admin\\guiofi.exe /b" guiofi.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 516 b45661bfcd3c9081db22ba55287cc6d9c3de788837542b0e000de347354c7600.exe 516 b45661bfcd3c9081db22ba55287cc6d9c3de788837542b0e000de347354c7600.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe 3540 guiofi.exe -
Suspicious use of SetWindowsHookEx 4 IoCs
pid Process 516 b45661bfcd3c9081db22ba55287cc6d9c3de788837542b0e000de347354c7600.exe 516 b45661bfcd3c9081db22ba55287cc6d9c3de788837542b0e000de347354c7600.exe 3540 guiofi.exe 3540 guiofi.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 516 wrote to memory of 3540 516 b45661bfcd3c9081db22ba55287cc6d9c3de788837542b0e000de347354c7600.exe 82 PID 516 wrote to memory of 3540 516 b45661bfcd3c9081db22ba55287cc6d9c3de788837542b0e000de347354c7600.exe 82 PID 516 wrote to memory of 3540 516 b45661bfcd3c9081db22ba55287cc6d9c3de788837542b0e000de347354c7600.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\b45661bfcd3c9081db22ba55287cc6d9c3de788837542b0e000de347354c7600.exe"C:\Users\Admin\AppData\Local\Temp\b45661bfcd3c9081db22ba55287cc6d9c3de788837542b0e000de347354c7600.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:516 -
C:\Users\Admin\guiofi.exe"C:\Users\Admin\guiofi.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:3540
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
360KB
MD5ff579999cc273f9271ed8f09bb1875d3
SHA1ea4759d88d610570eca6994ad267246d53504ac9
SHA256e2d803c48455de187ec9e9d5e50488e83321520b5556bb0733c7e596dbbf48a3
SHA5121a2cfcf5a1fb8298312506e45e0e8e2a9d3fc8a083094418e4891e0df7ce043160ba6c51e7f54b9f15dfdab5831548b9d9fde7ddf4979df1eee2370592f0838f
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Filesize
360KB
MD5ff579999cc273f9271ed8f09bb1875d3
SHA1ea4759d88d610570eca6994ad267246d53504ac9
SHA256e2d803c48455de187ec9e9d5e50488e83321520b5556bb0733c7e596dbbf48a3
SHA5121a2cfcf5a1fb8298312506e45e0e8e2a9d3fc8a083094418e4891e0df7ce043160ba6c51e7f54b9f15dfdab5831548b9d9fde7ddf4979df1eee2370592f0838f