Analysis
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max time kernel
182s -
max time network
51s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system -
submitted
01/12/2022, 22:43
Static task
static1
Behavioral task
behavioral1
Sample
c292df5da5ec342e70d55d67ce64b8f7fd9aeccbeaebb88df98dd6dac6fbe961.exe
Resource
win7-20220812-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
c292df5da5ec342e70d55d67ce64b8f7fd9aeccbeaebb88df98dd6dac6fbe961.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
c292df5da5ec342e70d55d67ce64b8f7fd9aeccbeaebb88df98dd6dac6fbe961.exe
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Size
88KB
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MD5
6a860dc52093d8788209dfcdfd8b6d5c
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SHA1
707a335328c617d9fdd5dc051794c3db4040fb5c
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SHA256
c292df5da5ec342e70d55d67ce64b8f7fd9aeccbeaebb88df98dd6dac6fbe961
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SHA512
2194dc5a08d8da473faae2a31e13823e05f5f75dcf2c1ce614332fd207363916d3bd6d3fb924885001be4f6693defcaf75f5e013219b8cd96c0e838f4c3dd76f
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SSDEEP
1536:ezUDdaaW1pLDcw3Hr+PaGme76FrknzKLqOP:AUDblOFonzK9
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" c292df5da5ec342e70d55d67ce64b8f7fd9aeccbeaebb88df98dd6dac6fbe961.exe Set value (int) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" biufai.exe -
Executes dropped EXE 1 IoCs
pid Process 1348 biufai.exe -
Loads dropped DLL 2 IoCs
pid Process 2000 c292df5da5ec342e70d55d67ce64b8f7fd9aeccbeaebb88df98dd6dac6fbe961.exe 2000 c292df5da5ec342e70d55d67ce64b8f7fd9aeccbeaebb88df98dd6dac6fbe961.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\biufai = "C:\\Users\\Admin\\biufai.exe /h" biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /f" biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /x" biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /r" biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /d" biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /n" biufai.exe Key created \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\ c292df5da5ec342e70d55d67ce64b8f7fd9aeccbeaebb88df98dd6dac6fbe961.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /y" biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /e" biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /v" biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /g" biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /q" biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /p" biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /u" biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /t" biufai.exe Key created \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\ biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /s" biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /j" biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /a" biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /b" biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /m" biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /k" biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /c" c292df5da5ec342e70d55d67ce64b8f7fd9aeccbeaebb88df98dd6dac6fbe961.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /c" biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /w" biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /i" biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /o" biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /l" biufai.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\biufai = "C:\\Users\\Admin\\biufai.exe /z" biufai.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 2000 c292df5da5ec342e70d55d67ce64b8f7fd9aeccbeaebb88df98dd6dac6fbe961.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe 1348 biufai.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 2000 c292df5da5ec342e70d55d67ce64b8f7fd9aeccbeaebb88df98dd6dac6fbe961.exe 1348 biufai.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2000 wrote to memory of 1348 2000 c292df5da5ec342e70d55d67ce64b8f7fd9aeccbeaebb88df98dd6dac6fbe961.exe 28 PID 2000 wrote to memory of 1348 2000 c292df5da5ec342e70d55d67ce64b8f7fd9aeccbeaebb88df98dd6dac6fbe961.exe 28 PID 2000 wrote to memory of 1348 2000 c292df5da5ec342e70d55d67ce64b8f7fd9aeccbeaebb88df98dd6dac6fbe961.exe 28 PID 2000 wrote to memory of 1348 2000 c292df5da5ec342e70d55d67ce64b8f7fd9aeccbeaebb88df98dd6dac6fbe961.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\c292df5da5ec342e70d55d67ce64b8f7fd9aeccbeaebb88df98dd6dac6fbe961.exe"C:\Users\Admin\AppData\Local\Temp\c292df5da5ec342e70d55d67ce64b8f7fd9aeccbeaebb88df98dd6dac6fbe961.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:2000 -
C:\Users\Admin\biufai.exe"C:\Users\Admin\biufai.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:1348
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
88KB
MD59adefeecfec3ac48576d5fe181f12cd8
SHA1b328fd047cfef8ae2db950f2f73847c01e6a9f16
SHA2564941673aaf76a5856f4a77502dfe0c2f1f21c46a20c0d5c47ee910f8ebd3312a
SHA512e83fe325b542e5a3638278d5247c89666a58e84e26450a72b686587d0b3bc980487fc53a798fa6c9dff122117534645542db13ed0242f88b50e7efcc8559b916
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Filesize
88KB
MD59adefeecfec3ac48576d5fe181f12cd8
SHA1b328fd047cfef8ae2db950f2f73847c01e6a9f16
SHA2564941673aaf76a5856f4a77502dfe0c2f1f21c46a20c0d5c47ee910f8ebd3312a
SHA512e83fe325b542e5a3638278d5247c89666a58e84e26450a72b686587d0b3bc980487fc53a798fa6c9dff122117534645542db13ed0242f88b50e7efcc8559b916
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Filesize
88KB
MD59adefeecfec3ac48576d5fe181f12cd8
SHA1b328fd047cfef8ae2db950f2f73847c01e6a9f16
SHA2564941673aaf76a5856f4a77502dfe0c2f1f21c46a20c0d5c47ee910f8ebd3312a
SHA512e83fe325b542e5a3638278d5247c89666a58e84e26450a72b686587d0b3bc980487fc53a798fa6c9dff122117534645542db13ed0242f88b50e7efcc8559b916
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Filesize
88KB
MD59adefeecfec3ac48576d5fe181f12cd8
SHA1b328fd047cfef8ae2db950f2f73847c01e6a9f16
SHA2564941673aaf76a5856f4a77502dfe0c2f1f21c46a20c0d5c47ee910f8ebd3312a
SHA512e83fe325b542e5a3638278d5247c89666a58e84e26450a72b686587d0b3bc980487fc53a798fa6c9dff122117534645542db13ed0242f88b50e7efcc8559b916