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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
20/10/2022, 05:16
Static task
static1
Behavioral task
behavioral1
Sample
4e703dd145715def9cc64ee25fb9d225575d773374f0628e0775cf7b31a20222.exe
Resource
win7-20220812-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
4e703dd145715def9cc64ee25fb9d225575d773374f0628e0775cf7b31a20222.exe
Resource
win10v2004-20220901-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
4e703dd145715def9cc64ee25fb9d225575d773374f0628e0775cf7b31a20222.exe
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Size
84KB
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MD5
8163478b2a291ced0fb19a17071cfa80
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SHA1
7a98cb8d02ee5464f3fddf2a420ca225591abb9e
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SHA256
4e703dd145715def9cc64ee25fb9d225575d773374f0628e0775cf7b31a20222
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SHA512
d7f54d22759bde84c8e3bbb97fe38c82f49931fd4ec6ace9c352101e92cd70ed0bd751c5d5451c78333b89a424c85d9e30811bcd38caca03b6f8f1cc61850e6a
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SSDEEP
1536:osmdgG5S16Lti8n42APNR2dcScLcPcxeTanuUHWOms3xxNMq39gk34iS5v:l04PNEdcScLcPcfnuS0hv
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" 4e703dd145715def9cc64ee25fb9d225575d773374f0628e0775cf7b31a20222.exe Set value (int) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" yiiril.exe -
Executes dropped EXE 1 IoCs
pid Process 5036 yiiril.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 4e703dd145715def9cc64ee25fb9d225575d773374f0628e0775cf7b31a20222.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\yiiril = "C:\\Users\\Admin\\yiiril.exe /l" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /j" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /t" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /y" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /q" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /n" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /h" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /r" yiiril.exe Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run\ yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /p" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /m" yiiril.exe Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run\ 4e703dd145715def9cc64ee25fb9d225575d773374f0628e0775cf7b31a20222.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /v" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /f" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /a" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /w" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /d" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /u" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /i" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /b" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /k" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /e" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /o" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /g" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /x" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /z" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /s" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /c" yiiril.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yiiril = "C:\\Users\\Admin\\yiiril.exe /f" 4e703dd145715def9cc64ee25fb9d225575d773374f0628e0775cf7b31a20222.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 4060 4e703dd145715def9cc64ee25fb9d225575d773374f0628e0775cf7b31a20222.exe 4060 4e703dd145715def9cc64ee25fb9d225575d773374f0628e0775cf7b31a20222.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe 5036 yiiril.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 4060 4e703dd145715def9cc64ee25fb9d225575d773374f0628e0775cf7b31a20222.exe 5036 yiiril.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4060 wrote to memory of 5036 4060 4e703dd145715def9cc64ee25fb9d225575d773374f0628e0775cf7b31a20222.exe 83 PID 4060 wrote to memory of 5036 4060 4e703dd145715def9cc64ee25fb9d225575d773374f0628e0775cf7b31a20222.exe 83 PID 4060 wrote to memory of 5036 4060 4e703dd145715def9cc64ee25fb9d225575d773374f0628e0775cf7b31a20222.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\4e703dd145715def9cc64ee25fb9d225575d773374f0628e0775cf7b31a20222.exe"C:\Users\Admin\AppData\Local\Temp\4e703dd145715def9cc64ee25fb9d225575d773374f0628e0775cf7b31a20222.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:4060 -
C:\Users\Admin\yiiril.exe"C:\Users\Admin\yiiril.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:5036
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
84KB
MD59ab3f7b9d8889b5552e115da7875e92c
SHA1ab896648c4f4c82df15ac1c3402807326a1256b7
SHA256ce0143cb40109d24d548308826c54e42337a3db1411d2a9f8128b7764504901b
SHA51231cc65296300c010ddc25e54985fed7a89a3f4ba0784b9936d93e1ac08975096428c927f8ec540b2dc97db1a6632b1294eb47d526f09bfffe29254139983e8da
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Filesize
84KB
MD59ab3f7b9d8889b5552e115da7875e92c
SHA1ab896648c4f4c82df15ac1c3402807326a1256b7
SHA256ce0143cb40109d24d548308826c54e42337a3db1411d2a9f8128b7764504901b
SHA51231cc65296300c010ddc25e54985fed7a89a3f4ba0784b9936d93e1ac08975096428c927f8ec540b2dc97db1a6632b1294eb47d526f09bfffe29254139983e8da