Analysis
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max time kernel
201s -
max time network
246s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system -
submitted
07/12/2022, 03:27
Static task
static1
Behavioral task
behavioral1
Sample
f2b5a39cd7dc2872779b2cee65bb5d76cc6d284345f50c40745a9c31b1fd4946.exe
Resource
win7-20220812-en
windows7-x64
9 signatures
150 seconds
Behavioral task
behavioral2
Sample
f2b5a39cd7dc2872779b2cee65bb5d76cc6d284345f50c40745a9c31b1fd4946.exe
Resource
win10v2004-20221111-en
windows10-2004-x64
10 signatures
150 seconds
General
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Target
f2b5a39cd7dc2872779b2cee65bb5d76cc6d284345f50c40745a9c31b1fd4946.exe
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Size
244KB
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MD5
f5f355085d72d2510b12d0f3760395a0
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SHA1
3d73d547328b5bf1390d721615955be3b6440436
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SHA256
f2b5a39cd7dc2872779b2cee65bb5d76cc6d284345f50c40745a9c31b1fd4946
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SHA512
41d512155dc74afd36e2be8b3a9b181417aed6e36818fbdd390793391729b643a765370f62abf91541b4346468aa106d01c1d46ac3566be48707b81e7e24a65d
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SSDEEP
3072:CTgTtWKfoa96895EKL2K3mG/iCXxhKOLPXvOH8dyRN2:pTloa96iL2KfvxhKC/Ocdr
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-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" f2b5a39cd7dc2872779b2cee65bb5d76cc6d284345f50c40745a9c31b1fd4946.exe Set value (int) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" guaaro.exe -
Executes dropped EXE 1 IoCs
pid Process 4324 guaaro.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-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation f2b5a39cd7dc2872779b2cee65bb5d76cc6d284345f50c40745a9c31b1fd4946.exe -
Adds Run key to start application 2 TTPs 29 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /b" guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /s" guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /g" guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /w" guaaro.exe Key created \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Windows\CurrentVersion\Run\ f2b5a39cd7dc2872779b2cee65bb5d76cc6d284345f50c40745a9c31b1fd4946.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /q" guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /e" guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /h" guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /o" guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /l" guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /r" guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /t" guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /c" guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /i" guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /z" guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /d" guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /p" guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /l" f2b5a39cd7dc2872779b2cee65bb5d76cc6d284345f50c40745a9c31b1fd4946.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /a" guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /m" guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /u" guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /x" guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /j" guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /f" guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /k" guaaro.exe Key created \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Windows\CurrentVersion\Run\ guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /v" guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /y" guaaro.exe Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\guaaro = "C:\\Users\\Admin\\guaaro.exe /n" guaaro.exe -
Maps connected drives based on registry 3 TTPs 4 IoCs
Disk information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0 f2b5a39cd7dc2872779b2cee65bb5d76cc6d284345f50c40745a9c31b1fd4946.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum guaaro.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0 guaaro.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum f2b5a39cd7dc2872779b2cee65bb5d76cc6d284345f50c40745a9c31b1fd4946.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000_Classes\Local Settings f2b5a39cd7dc2872779b2cee65bb5d76cc6d284345f50c40745a9c31b1fd4946.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 4900 f2b5a39cd7dc2872779b2cee65bb5d76cc6d284345f50c40745a9c31b1fd4946.exe 4900 f2b5a39cd7dc2872779b2cee65bb5d76cc6d284345f50c40745a9c31b1fd4946.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe 4324 guaaro.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 4900 f2b5a39cd7dc2872779b2cee65bb5d76cc6d284345f50c40745a9c31b1fd4946.exe 4324 guaaro.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4900 wrote to memory of 4324 4900 f2b5a39cd7dc2872779b2cee65bb5d76cc6d284345f50c40745a9c31b1fd4946.exe 81 PID 4900 wrote to memory of 4324 4900 f2b5a39cd7dc2872779b2cee65bb5d76cc6d284345f50c40745a9c31b1fd4946.exe 81 PID 4900 wrote to memory of 4324 4900 f2b5a39cd7dc2872779b2cee65bb5d76cc6d284345f50c40745a9c31b1fd4946.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\f2b5a39cd7dc2872779b2cee65bb5d76cc6d284345f50c40745a9c31b1fd4946.exe"C:\Users\Admin\AppData\Local\Temp\f2b5a39cd7dc2872779b2cee65bb5d76cc6d284345f50c40745a9c31b1fd4946.exe"1⤵
- Modifies visiblity of hidden/system files in Explorer
- Checks computer location settings
- Adds Run key to start application
- Maps connected drives based on registry
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4900 -
C:\Users\Admin\guaaro.exe"C:\Users\Admin\guaaro.exe"2⤵
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- Adds Run key to start application
- Maps connected drives based on registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:4324
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C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵PID:3548
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
244KB
MD5f5f355085d72d2510b12d0f3760395a0
SHA13d73d547328b5bf1390d721615955be3b6440436
SHA256f2b5a39cd7dc2872779b2cee65bb5d76cc6d284345f50c40745a9c31b1fd4946
SHA51241d512155dc74afd36e2be8b3a9b181417aed6e36818fbdd390793391729b643a765370f62abf91541b4346468aa106d01c1d46ac3566be48707b81e7e24a65d
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Filesize
244KB
MD5f5f355085d72d2510b12d0f3760395a0
SHA13d73d547328b5bf1390d721615955be3b6440436
SHA256f2b5a39cd7dc2872779b2cee65bb5d76cc6d284345f50c40745a9c31b1fd4946
SHA51241d512155dc74afd36e2be8b3a9b181417aed6e36818fbdd390793391729b643a765370f62abf91541b4346468aa106d01c1d46ac3566be48707b81e7e24a65d