General
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Target
userassist-tool.exe
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Size
12.7MB
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Sample
240620-jn39yswhmh
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MD5
4f632fe72cf0db88f6bcc9555ff857ff
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SHA1
5de7916c3248c9da7e3572cdb42f3cc28eb76d48
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SHA256
1040a1fbb98532043ac33ce5bf11a5e493ab8cf7c7baa703a9df0166dda0cf62
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SHA512
02e2f60510a3ac5adc6fe78bb96c14ee2bca7b00504b8256e5c5c55836f7bf04e96f93f75981477117c404f89868c0f98a29f1b5f30c47e3f3305da61e003ea3
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SSDEEP
196608:lZFMT4SxZk98GseGJI1JgUZmKO1Cb0TeN/FJMIDJf0gsAGK4RFuozTp:GzZW8GsR0Jgja/Fqyf0gstFuCF
Behavioral task
behavioral1
Sample
userassist-tool.exe
Resource
win10-20240404-en
Behavioral task
behavioral2
Sample
userassist-tool.exe
Resource
win10v2004-20240611-en
Malware Config
Targets
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Target
userassist-tool.exe
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Size
12.7MB
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MD5
4f632fe72cf0db88f6bcc9555ff857ff
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SHA1
5de7916c3248c9da7e3572cdb42f3cc28eb76d48
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SHA256
1040a1fbb98532043ac33ce5bf11a5e493ab8cf7c7baa703a9df0166dda0cf62
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SHA512
02e2f60510a3ac5adc6fe78bb96c14ee2bca7b00504b8256e5c5c55836f7bf04e96f93f75981477117c404f89868c0f98a29f1b5f30c47e3f3305da61e003ea3
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SSDEEP
196608:lZFMT4SxZk98GseGJI1JgUZmKO1Cb0TeN/FJMIDJf0gsAGK4RFuozTp:GzZW8GsR0Jgja/Fqyf0gstFuCF
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Identifies VirtualBox via ACPI registry values (likely anti-VM)
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Command and Scripting Interpreter: PowerShell
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
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Checks BIOS information in registry
BIOS information is often read in order to detect sandboxing environments.
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Executes dropped EXE
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Loads dropped DLL
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Accesses cryptocurrency files/wallets, possible credential harvesting
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Looks up external IP address via web service
Uses a legitimate IP lookup service to find the infected system's external IP.
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Suspicious use of NtSetInformationThreadHideFromDebugger
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