Analysis
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max time kernel
151s -
max time network
52s -
platform
windows7_x64 -
resource
win7-20220901-en -
resource tags
arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system -
submitted
30/10/2022, 00:03
Static task
static1
Behavioral task
behavioral1
Sample
5a2f785e29caa532b03df862116986fec7f15ad87d87fbd00f71c85f58023a0f.exe
Resource
win7-20220901-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
5a2f785e29caa532b03df862116986fec7f15ad87d87fbd00f71c85f58023a0f.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
9 signatures
150 seconds
General
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Target
5a2f785e29caa532b03df862116986fec7f15ad87d87fbd00f71c85f58023a0f.exe
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Size
272KB
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MD5
93d29a3cc4f2d97b7e54195fabf0da50
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SHA1
1a9ef88d2c9563256580cb09b013e7e2bfb601de
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SHA256
5a2f785e29caa532b03df862116986fec7f15ad87d87fbd00f71c85f58023a0f
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SHA512
f1c8cf412ca0771ec8a8010bd38b82eae966939592d133cd4108cac28b9594202ad5e013d078c95062c06519a354d8623f513c25526b79603a7baf6503a8b796
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SSDEEP
3072:O4h9gmss0FvbVJznCRcz/hVFA9MSs/PLLj+Qm4U3YwgTeA3l34:LAvbfznH7O9G/PLLxU3YwgTb
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-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" 5a2f785e29caa532b03df862116986fec7f15ad87d87fbd00f71c85f58023a0f.exe Set value (int) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" yauosig.exe -
Executes dropped EXE 1 IoCs
pid Process 2004 yauosig.exe -
Loads dropped DLL 2 IoCs
pid Process 948 5a2f785e29caa532b03df862116986fec7f15ad87d87fbd00f71c85f58023a0f.exe 948 5a2f785e29caa532b03df862116986fec7f15ad87d87fbd00f71c85f58023a0f.exe -
Adds Run key to start application 2 TTPs 29 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /s" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /c" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /i" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /b" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /k" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /p" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /j" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /t" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /v" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /e" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /y" 5a2f785e29caa532b03df862116986fec7f15ad87d87fbd00f71c85f58023a0f.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /x" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /o" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /n" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /q" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /a" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /m" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /f" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /w" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /d" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /z" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /g" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /u" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /y" yauosig.exe Key created \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\ 5a2f785e29caa532b03df862116986fec7f15ad87d87fbd00f71c85f58023a0f.exe Key created \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\ yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /r" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /l" yauosig.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\yauosig = "C:\\Users\\Admin\\yauosig.exe /h" yauosig.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 948 5a2f785e29caa532b03df862116986fec7f15ad87d87fbd00f71c85f58023a0f.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe 2004 yauosig.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 948 5a2f785e29caa532b03df862116986fec7f15ad87d87fbd00f71c85f58023a0f.exe 2004 yauosig.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 948 wrote to memory of 2004 948 5a2f785e29caa532b03df862116986fec7f15ad87d87fbd00f71c85f58023a0f.exe 27 PID 948 wrote to memory of 2004 948 5a2f785e29caa532b03df862116986fec7f15ad87d87fbd00f71c85f58023a0f.exe 27 PID 948 wrote to memory of 2004 948 5a2f785e29caa532b03df862116986fec7f15ad87d87fbd00f71c85f58023a0f.exe 27 PID 948 wrote to memory of 2004 948 5a2f785e29caa532b03df862116986fec7f15ad87d87fbd00f71c85f58023a0f.exe 27
Processes
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C:\Users\Admin\AppData\Local\Temp\5a2f785e29caa532b03df862116986fec7f15ad87d87fbd00f71c85f58023a0f.exe"C:\Users\Admin\AppData\Local\Temp\5a2f785e29caa532b03df862116986fec7f15ad87d87fbd00f71c85f58023a0f.exe"1⤵
- Modifies visiblity of hidden/system files in Explorer
- Loads dropped DLL
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:948 -
C:\Users\Admin\yauosig.exe"C:\Users\Admin\yauosig.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:2004
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
272KB
MD593d29a3cc4f2d97b7e54195fabf0da50
SHA11a9ef88d2c9563256580cb09b013e7e2bfb601de
SHA2565a2f785e29caa532b03df862116986fec7f15ad87d87fbd00f71c85f58023a0f
SHA512f1c8cf412ca0771ec8a8010bd38b82eae966939592d133cd4108cac28b9594202ad5e013d078c95062c06519a354d8623f513c25526b79603a7baf6503a8b796
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Filesize
272KB
MD593d29a3cc4f2d97b7e54195fabf0da50
SHA11a9ef88d2c9563256580cb09b013e7e2bfb601de
SHA2565a2f785e29caa532b03df862116986fec7f15ad87d87fbd00f71c85f58023a0f
SHA512f1c8cf412ca0771ec8a8010bd38b82eae966939592d133cd4108cac28b9594202ad5e013d078c95062c06519a354d8623f513c25526b79603a7baf6503a8b796
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Filesize
272KB
MD593d29a3cc4f2d97b7e54195fabf0da50
SHA11a9ef88d2c9563256580cb09b013e7e2bfb601de
SHA2565a2f785e29caa532b03df862116986fec7f15ad87d87fbd00f71c85f58023a0f
SHA512f1c8cf412ca0771ec8a8010bd38b82eae966939592d133cd4108cac28b9594202ad5e013d078c95062c06519a354d8623f513c25526b79603a7baf6503a8b796
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Filesize
272KB
MD593d29a3cc4f2d97b7e54195fabf0da50
SHA11a9ef88d2c9563256580cb09b013e7e2bfb601de
SHA2565a2f785e29caa532b03df862116986fec7f15ad87d87fbd00f71c85f58023a0f
SHA512f1c8cf412ca0771ec8a8010bd38b82eae966939592d133cd4108cac28b9594202ad5e013d078c95062c06519a354d8623f513c25526b79603a7baf6503a8b796