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General
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Target
croyytnb.ef1.exe
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Size
5.0MB
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Sample
240713-lpswqaxhmb
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MD5
5524daa07608a93528994d9a870e82fe
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SHA1
4d388c0ccecbba0e53406f147845da0cdcf17254
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SHA256
2b9eb3238b831e83d2579452bc6e45915de682b8e079632afab63be441ccb89a
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SHA512
d9d8379bf2398cd128ced2bcf66441c88068012d49e4a893489dbe2ace5110f456cd57df294ce68fbe9663f1bd555d88a21ac54b402e4c78cb89256a07bf6da5
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SSDEEP
98304:rFfo66T0/ojCtEfD19WnQNIKg3FfRJrR44LjTg+2in/HTcwPDlty+aZ80h:pfojTmo2UsAIDfRDdWin/HIkl70h
Static task
static1
Behavioral task
behavioral1
Sample
croyytnb.ef1.exe
Resource
win7-20240708-en
Behavioral task
behavioral2
Sample
croyytnb.ef1.exe
Resource
win10v2004-20240709-en
Malware Config
Targets
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Target
croyytnb.ef1.exe
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Size
5.0MB
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MD5
5524daa07608a93528994d9a870e82fe
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SHA1
4d388c0ccecbba0e53406f147845da0cdcf17254
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SHA256
2b9eb3238b831e83d2579452bc6e45915de682b8e079632afab63be441ccb89a
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SHA512
d9d8379bf2398cd128ced2bcf66441c88068012d49e4a893489dbe2ace5110f456cd57df294ce68fbe9663f1bd555d88a21ac54b402e4c78cb89256a07bf6da5
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SSDEEP
98304:rFfo66T0/ojCtEfD19WnQNIKg3FfRJrR44LjTg+2in/HTcwPDlty+aZ80h:pfojTmo2UsAIDfRDdWin/HIkl70h
Score9/10-
Identifies VirtualBox via ACPI registry values (likely anti-VM)
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Checks BIOS information in registry
BIOS information is often read in order to detect sandboxing environments.
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Writes to the Master Boot Record (MBR)
Bootkits write to the MBR to gain persistence at a level below the operating system.
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Suspicious use of NtSetInformationThreadHideFromDebugger
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