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Analysis
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max time kernel
152s -
max time network
132s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
29/11/2022, 03:18
Static task
static1
Behavioral task
behavioral1
Sample
a2ca1f29e154ba98b589967c2ca5fcf5e96f0f3c0e1a6fbe740e0d29b907fa91.exe
Resource
win7-20221111-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
a2ca1f29e154ba98b589967c2ca5fcf5e96f0f3c0e1a6fbe740e0d29b907fa91.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
a2ca1f29e154ba98b589967c2ca5fcf5e96f0f3c0e1a6fbe740e0d29b907fa91.exe
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Size
140KB
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MD5
d06a88f85f14fa2951739cc0b565ac52
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SHA1
8d6b94956c7cf0787c6043a3d372f98c3b55307e
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SHA256
a2ca1f29e154ba98b589967c2ca5fcf5e96f0f3c0e1a6fbe740e0d29b907fa91
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SHA512
c6f5561d1554201331e98fac4045d50f72b89c3b2defefcb56e694ddc762894b95ba32a496c137ff6fc9f712fad9140964eba0833679d57ca14d092d600402bd
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SSDEEP
1536:YnJFc6Xg/VwssUfw5GZS5u61rC634cmY77UsMJXGoQDnzqLcTJLO01DvqlWgB0gZ:mJFc6QtRLYt77UsMJXGoFDwfG
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-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" guuof.exe Set value (int) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" a2ca1f29e154ba98b589967c2ca5fcf5e96f0f3c0e1a6fbe740e0d29b907fa91.exe -
Executes dropped EXE 1 IoCs
pid Process 4904 guuof.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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation a2ca1f29e154ba98b589967c2ca5fcf5e96f0f3c0e1a6fbe740e0d29b907fa91.exe -
Adds Run key to start application 2 TTPs 29 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /r" guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /c" guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /b" guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /s" guuof.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows\CurrentVersion\Run\ guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /l" guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /k" guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /x" guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /g" guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /e" guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /w" guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /n" guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /d" guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /t" guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /y" guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /a" guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /f" guuof.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows\CurrentVersion\Run\ a2ca1f29e154ba98b589967c2ca5fcf5e96f0f3c0e1a6fbe740e0d29b907fa91.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /z" guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /u" guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /p" guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /i" guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /b" a2ca1f29e154ba98b589967c2ca5fcf5e96f0f3c0e1a6fbe740e0d29b907fa91.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /v" guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /m" guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /q" guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /o" guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /j" guuof.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guuof = "C:\\Users\\Admin\\guuof.exe /h" guuof.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 2440 a2ca1f29e154ba98b589967c2ca5fcf5e96f0f3c0e1a6fbe740e0d29b907fa91.exe 2440 a2ca1f29e154ba98b589967c2ca5fcf5e96f0f3c0e1a6fbe740e0d29b907fa91.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe 4904 guuof.exe -
Suspicious use of SetWindowsHookEx 4 IoCs
pid Process 2440 a2ca1f29e154ba98b589967c2ca5fcf5e96f0f3c0e1a6fbe740e0d29b907fa91.exe 2440 a2ca1f29e154ba98b589967c2ca5fcf5e96f0f3c0e1a6fbe740e0d29b907fa91.exe 4904 guuof.exe 4904 guuof.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 2440 wrote to memory of 4904 2440 a2ca1f29e154ba98b589967c2ca5fcf5e96f0f3c0e1a6fbe740e0d29b907fa91.exe 79 PID 2440 wrote to memory of 4904 2440 a2ca1f29e154ba98b589967c2ca5fcf5e96f0f3c0e1a6fbe740e0d29b907fa91.exe 79 PID 2440 wrote to memory of 4904 2440 a2ca1f29e154ba98b589967c2ca5fcf5e96f0f3c0e1a6fbe740e0d29b907fa91.exe 79
Processes
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C:\Users\Admin\AppData\Local\Temp\a2ca1f29e154ba98b589967c2ca5fcf5e96f0f3c0e1a6fbe740e0d29b907fa91.exe"C:\Users\Admin\AppData\Local\Temp\a2ca1f29e154ba98b589967c2ca5fcf5e96f0f3c0e1a6fbe740e0d29b907fa91.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:2440 -
C:\Users\Admin\guuof.exe"C:\Users\Admin\guuof.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:4904
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
140KB
MD58497dc40dc0e1fc80261aa9435e6c233
SHA19c99e4ca02fc6324eedc0139ff83bfe6491b45aa
SHA256cc22bf255c2525c130babf6e5feb67fc56d7367171bd01af2a29c99abdf0b218
SHA512ee47c8727c00218bb0b339957124df89472361d3d621e386840dc41b75a9c78a656ec8a32a9f84cfadef73b6e93922647595db7bcdb45f199a9924626d1aa6e7
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Filesize
140KB
MD58497dc40dc0e1fc80261aa9435e6c233
SHA19c99e4ca02fc6324eedc0139ff83bfe6491b45aa
SHA256cc22bf255c2525c130babf6e5feb67fc56d7367171bd01af2a29c99abdf0b218
SHA512ee47c8727c00218bb0b339957124df89472361d3d621e386840dc41b75a9c78a656ec8a32a9f84cfadef73b6e93922647595db7bcdb45f199a9924626d1aa6e7