Analysis
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max time kernel
152s -
max time network
127s -
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, 17:34
Static task
static1
Behavioral task
behavioral1
Sample
81ff1fab47dcd93c488f4a1d831c91fe2c4e63d00a5aadf14a0b204894e83d20.exe
Resource
win7-20220812-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
81ff1fab47dcd93c488f4a1d831c91fe2c4e63d00a5aadf14a0b204894e83d20.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
81ff1fab47dcd93c488f4a1d831c91fe2c4e63d00a5aadf14a0b204894e83d20.exe
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Size
200KB
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MD5
e52399e7c48e7fb73e7afb0d99f4f2dc
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SHA1
217b3957a17bb75f7fdbd4333c6952a268a6310d
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SHA256
81ff1fab47dcd93c488f4a1d831c91fe2c4e63d00a5aadf14a0b204894e83d20
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SHA512
0defc3cffe86482c387c43299d144c1d1640c39732ec7e4f14be65fc336b94608bca3d8df7d5db1bc9c025c2e0eef6017688a93fb56cd8652dafcbcdafb56bfd
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SSDEEP
1536:jeKgsz6RfSJ1tx1x1e2xNy3tQ9CW5EZWHakMwP9W6uXN993ZNxtFnqlGcNskVatm:C26RfSJL10tQ9nLHbB9WF478dDVBm45E
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" 81ff1fab47dcd93c488f4a1d831c91fe2c4e63d00a5aadf14a0b204894e83d20.exe Set value (int) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" naiuf.exe -
Executes dropped EXE 1 IoCs
pid Process 1368 naiuf.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 81ff1fab47dcd93c488f4a1d831c91fe2c4e63d00a5aadf14a0b204894e83d20.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\naiuf = "C:\\Users\\Admin\\naiuf.exe /d" 81ff1fab47dcd93c488f4a1d831c91fe2c4e63d00a5aadf14a0b204894e83d20.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /a" naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /g" naiuf.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows\CurrentVersion\Run\ naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /r" naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /k" naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /u" naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /j" naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /q" naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /l" naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /x" naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /e" naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /w" naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /s" naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /i" naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /o" naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /m" naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /b" naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /d" naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /h" naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /v" naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /t" naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /f" naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /z" naiuf.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows\CurrentVersion\Run\ 81ff1fab47dcd93c488f4a1d831c91fe2c4e63d00a5aadf14a0b204894e83d20.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /c" naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /y" naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /p" naiuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\naiuf = "C:\\Users\\Admin\\naiuf.exe /n" naiuf.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 1200 81ff1fab47dcd93c488f4a1d831c91fe2c4e63d00a5aadf14a0b204894e83d20.exe 1200 81ff1fab47dcd93c488f4a1d831c91fe2c4e63d00a5aadf14a0b204894e83d20.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe 1368 naiuf.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 1200 81ff1fab47dcd93c488f4a1d831c91fe2c4e63d00a5aadf14a0b204894e83d20.exe 1368 naiuf.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 1200 wrote to memory of 1368 1200 81ff1fab47dcd93c488f4a1d831c91fe2c4e63d00a5aadf14a0b204894e83d20.exe 79 PID 1200 wrote to memory of 1368 1200 81ff1fab47dcd93c488f4a1d831c91fe2c4e63d00a5aadf14a0b204894e83d20.exe 79 PID 1200 wrote to memory of 1368 1200 81ff1fab47dcd93c488f4a1d831c91fe2c4e63d00a5aadf14a0b204894e83d20.exe 79
Processes
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C:\Users\Admin\AppData\Local\Temp\81ff1fab47dcd93c488f4a1d831c91fe2c4e63d00a5aadf14a0b204894e83d20.exe"C:\Users\Admin\AppData\Local\Temp\81ff1fab47dcd93c488f4a1d831c91fe2c4e63d00a5aadf14a0b204894e83d20.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:1200 -
C:\Users\Admin\naiuf.exe"C:\Users\Admin\naiuf.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:1368
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
200KB
MD551aa2278ccfb77a1ba2d221bdf530082
SHA131e2052adfef4438747e5c6975628cf7de275910
SHA2565e32b313944ab0ba0c045f778c225a7addaa5e1e9bd2a4a26b67fc9db419150e
SHA51299f8c983484ed9aad15b2aece8b54a9194efe8ea7582d6f47e5a75414bb2047a7f7f7fb8f93165ae96ebc19011384c068b5f5bcd6d3a431c09d744578cef04b4
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Filesize
200KB
MD551aa2278ccfb77a1ba2d221bdf530082
SHA131e2052adfef4438747e5c6975628cf7de275910
SHA2565e32b313944ab0ba0c045f778c225a7addaa5e1e9bd2a4a26b67fc9db419150e
SHA51299f8c983484ed9aad15b2aece8b54a9194efe8ea7582d6f47e5a75414bb2047a7f7f7fb8f93165ae96ebc19011384c068b5f5bcd6d3a431c09d744578cef04b4