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
12-10-2022 14:34
Static task
static1
Behavioral task
behavioral1
Sample
b4d8946d86c292a317e51a361c025dacec179d5abe7390c111dfd6b6007370b4.exe
Resource
win7-20220812-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
b4d8946d86c292a317e51a361c025dacec179d5abe7390c111dfd6b6007370b4.exe
Resource
win10v2004-20220901-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
b4d8946d86c292a317e51a361c025dacec179d5abe7390c111dfd6b6007370b4.exe
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Size
192KB
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MD5
645ca490aa27772d1ea468fefff85301
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SHA1
467b3b44f0509dd09c10c9b8236a6f5cbeeeec60
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SHA256
b4d8946d86c292a317e51a361c025dacec179d5abe7390c111dfd6b6007370b4
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SHA512
a59d8660ad416ec4bc2c2a7fbf94c84dd9ebf7688436b231f9dffbf15babaf888a85304a122ed65b68ff0c1bd881dce6e4b0c7571c13a5eff39f6f9dbf7b3314
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SSDEEP
3072:4u8+MJApOOBrpM3lt0bqO4deKIpS2Q9tC3UwtxaTSGzGXDzp8D8OJbhaDgloeH:9OOBr63cbqO40K394aTSGzGZ8ogMe
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" b4d8946d86c292a317e51a361c025dacec179d5abe7390c111dfd6b6007370b4.exe Set value (int) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" cuulaal.exe -
Executes dropped EXE 1 IoCs
pid Process 1716 cuulaal.exe -
Loads dropped DLL 2 IoCs
pid Process 1764 b4d8946d86c292a317e51a361c025dacec179d5abe7390c111dfd6b6007370b4.exe 1764 b4d8946d86c292a317e51a361c025dacec179d5abe7390c111dfd6b6007370b4.exe -
Adds Run key to start application 2 TTPs 54 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /N" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /G" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /t" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /V" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /k" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /u" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /Q" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /c" cuulaal.exe Key created \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\ cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /Y" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /h" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /B" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /M" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /F" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /g" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /j" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /d" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /E" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /z" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /P" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /A" cuulaal.exe Key created \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\ b4d8946d86c292a317e51a361c025dacec179d5abe7390c111dfd6b6007370b4.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /n" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /y" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /p" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /J" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /I" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /S" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /T" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /R" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /C" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /D" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /b" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /r" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /H" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /L" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /O" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /s" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /m" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /K" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /w" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /a" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /U" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /E" b4d8946d86c292a317e51a361c025dacec179d5abe7390c111dfd6b6007370b4.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /e" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /f" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /l" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /Z" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /x" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /q" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /X" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /i" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /v" cuulaal.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\cuulaal = "C:\\Users\\Admin\\cuulaal.exe /o" cuulaal.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 1764 b4d8946d86c292a317e51a361c025dacec179d5abe7390c111dfd6b6007370b4.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe 1716 cuulaal.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 1764 b4d8946d86c292a317e51a361c025dacec179d5abe7390c111dfd6b6007370b4.exe 1716 cuulaal.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 1764 wrote to memory of 1716 1764 b4d8946d86c292a317e51a361c025dacec179d5abe7390c111dfd6b6007370b4.exe 28 PID 1764 wrote to memory of 1716 1764 b4d8946d86c292a317e51a361c025dacec179d5abe7390c111dfd6b6007370b4.exe 28 PID 1764 wrote to memory of 1716 1764 b4d8946d86c292a317e51a361c025dacec179d5abe7390c111dfd6b6007370b4.exe 28 PID 1764 wrote to memory of 1716 1764 b4d8946d86c292a317e51a361c025dacec179d5abe7390c111dfd6b6007370b4.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\b4d8946d86c292a317e51a361c025dacec179d5abe7390c111dfd6b6007370b4.exe"C:\Users\Admin\AppData\Local\Temp\b4d8946d86c292a317e51a361c025dacec179d5abe7390c111dfd6b6007370b4.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:1764 -
C:\Users\Admin\cuulaal.exe"C:\Users\Admin\cuulaal.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:1716
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
192KB
MD5b7509ff2f6a83889389f3e70a889f37b
SHA1dba42934787738a7cf28ed6c2eb6a947bfafe349
SHA256b058fb471f668bb388a732472e74f5cb2c3207537202d81bcaebe60705743e01
SHA51289c0c04007f3ce55263799c9e603a22df70d6dce7da5d282db5934c61399d274dac21e7fc445328e500d832482c37b4c6d40b5f92e4169ec6a5632738a063b3b
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Filesize
192KB
MD5b7509ff2f6a83889389f3e70a889f37b
SHA1dba42934787738a7cf28ed6c2eb6a947bfafe349
SHA256b058fb471f668bb388a732472e74f5cb2c3207537202d81bcaebe60705743e01
SHA51289c0c04007f3ce55263799c9e603a22df70d6dce7da5d282db5934c61399d274dac21e7fc445328e500d832482c37b4c6d40b5f92e4169ec6a5632738a063b3b
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Filesize
192KB
MD5b7509ff2f6a83889389f3e70a889f37b
SHA1dba42934787738a7cf28ed6c2eb6a947bfafe349
SHA256b058fb471f668bb388a732472e74f5cb2c3207537202d81bcaebe60705743e01
SHA51289c0c04007f3ce55263799c9e603a22df70d6dce7da5d282db5934c61399d274dac21e7fc445328e500d832482c37b4c6d40b5f92e4169ec6a5632738a063b3b
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Filesize
192KB
MD5b7509ff2f6a83889389f3e70a889f37b
SHA1dba42934787738a7cf28ed6c2eb6a947bfafe349
SHA256b058fb471f668bb388a732472e74f5cb2c3207537202d81bcaebe60705743e01
SHA51289c0c04007f3ce55263799c9e603a22df70d6dce7da5d282db5934c61399d274dac21e7fc445328e500d832482c37b4c6d40b5f92e4169ec6a5632738a063b3b