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Overview

overview

9

Static

static

3

croyytnb.ef1.exe

windows7-x64

9

croyytnb.ef1.exe

windows10-2004-x64

9

Sharing

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General

  • Target

    croyytnb.ef1.exe

  • Size

    5.0MB

  • Sample

    240713-lpswqaxhmb

  • MD5

    5524daa07608a93528994d9a870e82fe

  • SHA1

    4d388c0ccecbba0e53406f147845da0cdcf17254

  • SHA256

    2b9eb3238b831e83d2579452bc6e45915de682b8e079632afab63be441ccb89a

  • SHA512

    d9d8379bf2398cd128ced2bcf66441c88068012d49e4a893489dbe2ace5110f456cd57df294ce68fbe9663f1bd555d88a21ac54b402e4c78cb89256a07bf6da5

  • SSDEEP

    98304:rFfo66T0/ojCtEfD19WnQNIKg3FfRJrR44LjTg+2in/HTcwPDlty+aZ80h:pfojTmo2UsAIDfRDdWin/HIkl70h

Score
9/10
bootkitevasionpersistencetrojan

Malware Config

Targets

    • Target

      croyytnb.ef1.exe

    • Size

      5.0MB

    • MD5

      5524daa07608a93528994d9a870e82fe

    • SHA1

      4d388c0ccecbba0e53406f147845da0cdcf17254

    • SHA256

      2b9eb3238b831e83d2579452bc6e45915de682b8e079632afab63be441ccb89a

    • SHA512

      d9d8379bf2398cd128ced2bcf66441c88068012d49e4a893489dbe2ace5110f456cd57df294ce68fbe9663f1bd555d88a21ac54b402e4c78cb89256a07bf6da5

    • SSDEEP

      98304:rFfo66T0/ojCtEfD19WnQNIKg3FfRJrR44LjTg+2in/HTcwPDlty+aZ80h:pfojTmo2UsAIDfRDdWin/HIkl70h

    Score
    9/10
    bootkitevasionpersistencetrojan

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

      evasion

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks whether UAC is enabled

      evasiontrojan

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

      bootkitpersistence

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Tasks