Analysis
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max time kernel
146s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
11-10-2022 20:38
Static task
static1
Behavioral task
behavioral1
Sample
e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe
Resource
win7-20220901-en
windows7-x64
10 signatures
150 seconds
Behavioral task
behavioral2
Sample
e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe
Resource
win10v2004-20220901-en
windows10-2004-x64
10 signatures
150 seconds
General
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Target
e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe
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Size
143KB
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MD5
7c77a2430ceaba2169cd64d97cbfa5f0
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SHA1
5f07d401e14df2b3be43451399c70f20c73a90c7
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SHA256
e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce
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SHA512
3c38444d618651ecbf4b7fbd6c811dbf43675884c165365634cfe6c99b10f26437823e1ace529f7c3fe67fd0d61ece94a06e97fa359fae4355210b1b6a06d40e
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SSDEEP
3072:QAoOaoFxBJqHwCA0gdPjDhLTmFBD1Oolf/ms3A0+ott:8OaSw10RaDVlf34or
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" tiegu.exe Set value (int) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe -
Executes dropped EXE 1 IoCs
pid Process 1856 tiegu.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 e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe -
Adds Run key to start application 2 TTPs 13 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\tiegu = "C:\\Users\\Admin\\tiegu.exe /k" tiegu.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\tiegu = "C:\\Users\\Admin\\tiegu.exe /r" tiegu.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\tiegu = "C:\\Users\\Admin\\tiegu.exe /n" tiegu.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\tiegu = "C:\\Users\\Admin\\tiegu.exe /u" tiegu.exe Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run\ e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\tiegu = "C:\\Users\\Admin\\tiegu.exe /o" tiegu.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\tiegu = "C:\\Users\\Admin\\tiegu.exe /s" tiegu.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\tiegu = "C:\\Users\\Admin\\tiegu.exe /b" tiegu.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\tiegu = "C:\\Users\\Admin\\tiegu.exe /c" tiegu.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\tiegu = "C:\\Users\\Admin\\tiegu.exe /g" e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run\ tiegu.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\tiegu = "C:\\Users\\Admin\\tiegu.exe /g" tiegu.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\tiegu = "C:\\Users\\Admin\\tiegu.exe /e" tiegu.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 opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0 e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum tiegu.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0 tiegu.exe -
Drops autorun.inf file 1 TTPs 1 IoCs
Malware can abuse Windows Autorun to spread further via attached volumes.
description ioc Process File opened for modification C:\Users\Admin\c\autorun.inf tiegu.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 1016 e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe 1016 e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe 1016 e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe 1016 e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe 1016 e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe 1016 e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe 1016 e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe 1016 e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe 1016 e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe 1016 e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe 1016 e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe 1016 e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe 1856 tiegu.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 1016 e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe 1856 tiegu.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 1016 wrote to memory of 1856 1016 e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe 86 PID 1016 wrote to memory of 1856 1016 e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe 86 PID 1016 wrote to memory of 1856 1016 e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.exe"C:\Users\Admin\AppData\Local\Temp\e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce.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
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1016 -
C:\Users\Admin\tiegu.exe"C:\Users\Admin\tiegu.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
- Drops autorun.inf file
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:1856
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
143KB
MD57c77a2430ceaba2169cd64d97cbfa5f0
SHA15f07d401e14df2b3be43451399c70f20c73a90c7
SHA256e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce
SHA5123c38444d618651ecbf4b7fbd6c811dbf43675884c165365634cfe6c99b10f26437823e1ace529f7c3fe67fd0d61ece94a06e97fa359fae4355210b1b6a06d40e
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Filesize
143KB
MD57c77a2430ceaba2169cd64d97cbfa5f0
SHA15f07d401e14df2b3be43451399c70f20c73a90c7
SHA256e28c808249be660a3e44ed9990d4925e7acb4425fb7fc9f33b229f96632eb5ce
SHA5123c38444d618651ecbf4b7fbd6c811dbf43675884c165365634cfe6c99b10f26437823e1ace529f7c3fe67fd0d61ece94a06e97fa359fae4355210b1b6a06d40e