Analysis
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max time kernel
150s -
max time network
45s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system -
submitted
01/12/2022, 23:57
Static task
static1
Behavioral task
behavioral1
Sample
ffa46723d9cc5cb10f489ed35249d50923350177be5df6a5936c979c391c2e85.exe
Resource
win7-20220812-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
ffa46723d9cc5cb10f489ed35249d50923350177be5df6a5936c979c391c2e85.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
ffa46723d9cc5cb10f489ed35249d50923350177be5df6a5936c979c391c2e85.exe
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Size
352KB
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MD5
7d4aaac60c20157f4a38700fb8bf49c1
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SHA1
9e482d8c7213bfdf9587e2143185a5c5ef65fa4f
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SHA256
ffa46723d9cc5cb10f489ed35249d50923350177be5df6a5936c979c391c2e85
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SHA512
9a252c1eb4f22bfbefb76d887dab70d00a80be80631acfc9f67f942780105844254dac6af53f5e6b8e775f3f6baa1cba5617c834cb4eecf616034a55f8e229ff
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SSDEEP
3072:o9d1rZ92FqP1Ij9j0wQjiktVIyVcmsjWNbnOG7pdfXB+yTNdvE7leT0MY8zWELjC:ohZU7K1Zc/jWhvd0yTNxjT0M1zWyjYdP
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-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" nuiucu.exe Set value (int) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" ffa46723d9cc5cb10f489ed35249d50923350177be5df6a5936c979c391c2e85.exe -
Executes dropped EXE 1 IoCs
pid Process 1656 nuiucu.exe -
Loads dropped DLL 2 IoCs
pid Process 1404 ffa46723d9cc5cb10f489ed35249d50923350177be5df6a5936c979c391c2e85.exe 1404 ffa46723d9cc5cb10f489ed35249d50923350177be5df6a5936c979c391c2e85.exe -
Adds Run key to start application 2 TTPs 29 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /k" nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /y" nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /o" nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /u" nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /l" nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /c" nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /f" nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /h" nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /a" nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /s" nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /i" nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /z" nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /b" nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /w" nuiucu.exe Key created \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\ nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /m" nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /q" nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /g" nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /d" nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /j" nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /r" nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /t" nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /e" nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /x" nuiucu.exe Key created \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\ ffa46723d9cc5cb10f489ed35249d50923350177be5df6a5936c979c391c2e85.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /s" ffa46723d9cc5cb10f489ed35249d50923350177be5df6a5936c979c391c2e85.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /v" nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /n" nuiucu.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\nuiucu = "C:\\Users\\Admin\\nuiucu.exe /p" nuiucu.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 1404 ffa46723d9cc5cb10f489ed35249d50923350177be5df6a5936c979c391c2e85.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe 1656 nuiucu.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 1404 ffa46723d9cc5cb10f489ed35249d50923350177be5df6a5936c979c391c2e85.exe 1656 nuiucu.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 1404 wrote to memory of 1656 1404 ffa46723d9cc5cb10f489ed35249d50923350177be5df6a5936c979c391c2e85.exe 28 PID 1404 wrote to memory of 1656 1404 ffa46723d9cc5cb10f489ed35249d50923350177be5df6a5936c979c391c2e85.exe 28 PID 1404 wrote to memory of 1656 1404 ffa46723d9cc5cb10f489ed35249d50923350177be5df6a5936c979c391c2e85.exe 28 PID 1404 wrote to memory of 1656 1404 ffa46723d9cc5cb10f489ed35249d50923350177be5df6a5936c979c391c2e85.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\ffa46723d9cc5cb10f489ed35249d50923350177be5df6a5936c979c391c2e85.exe"C:\Users\Admin\AppData\Local\Temp\ffa46723d9cc5cb10f489ed35249d50923350177be5df6a5936c979c391c2e85.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:1404 -
C:\Users\Admin\nuiucu.exe"C:\Users\Admin\nuiucu.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:1656
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
352KB
MD51e01b5ef79e1510d77e65e666086066c
SHA15df7b7ccca401d2ba14671b7214051b5aafb00e7
SHA256759b15f8083afcdf8d92713fbd1dc31ee11fbf7bc5b53a84f6951d052b1321cf
SHA51267de85f854488d4e1b8a702037258b137f2ccbbcf114adce165b1e1779651988a9669ec37816c22530f56daa781c43c4fae66acec3e2f9c1687118de673a1b8d
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Filesize
352KB
MD51e01b5ef79e1510d77e65e666086066c
SHA15df7b7ccca401d2ba14671b7214051b5aafb00e7
SHA256759b15f8083afcdf8d92713fbd1dc31ee11fbf7bc5b53a84f6951d052b1321cf
SHA51267de85f854488d4e1b8a702037258b137f2ccbbcf114adce165b1e1779651988a9669ec37816c22530f56daa781c43c4fae66acec3e2f9c1687118de673a1b8d
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Filesize
352KB
MD51e01b5ef79e1510d77e65e666086066c
SHA15df7b7ccca401d2ba14671b7214051b5aafb00e7
SHA256759b15f8083afcdf8d92713fbd1dc31ee11fbf7bc5b53a84f6951d052b1321cf
SHA51267de85f854488d4e1b8a702037258b137f2ccbbcf114adce165b1e1779651988a9669ec37816c22530f56daa781c43c4fae66acec3e2f9c1687118de673a1b8d
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Filesize
352KB
MD51e01b5ef79e1510d77e65e666086066c
SHA15df7b7ccca401d2ba14671b7214051b5aafb00e7
SHA256759b15f8083afcdf8d92713fbd1dc31ee11fbf7bc5b53a84f6951d052b1321cf
SHA51267de85f854488d4e1b8a702037258b137f2ccbbcf114adce165b1e1779651988a9669ec37816c22530f56daa781c43c4fae66acec3e2f9c1687118de673a1b8d