Overview

overview

7

Static

static

1

cpuz.ini

windows7-x64

5

cpuz.ini

windows10-2004-x64

5

cpuz_x64.exe

windows7-x64

6

cpuz_x64.exe

windows10-2004-x64

7

Resubmissions

06-04-2023 01:50

230406-b9gzvacg41 7

06-04-2023 01:46

230406-b6yhesag32 1

06-04-2023 01:43

230406-b5fafscg21 7

Analysis

  • max time kernel
    416s
  • max time network
    393s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    06-04-2023 01:50

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General

  • Target

    cpuz_x64.exe

  • Size

    4.4MB

  • MD5

    052bbb4cf1736d4375cb9d33c6716f59

  • SHA1

    a2245821a0a676b83ed42b0cbe504bf863f2fef8

  • SHA256

    b617f63ba7afd4cdab95215bb48c7829311ef6226053ffe23f088e07068fed05

  • SHA512

    385df99203bc7c424ad7d9a5f1b9b41ee2cb495383e51e76739e9b14a2a05124ad102583c77ad789fb1da3da19c9e4ce004eb4495bdd2bac6df977930ec4a4ff

  • SSDEEP

    49152:TbH6EAnJD3G28reHVRYjE3TPnXELpItLc8aOm7s+TgC:TKnJD2etnXu427hTg

Score
6/10
bootkitpersistence

Malware Config

Signatures

  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

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

    bootkitpersistence
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Opens file in notepad (likely ransom note) 1 IoCs
    ransomware
  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious behavior: LoadsDriver 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 27 IoCs
  • Suspicious use of SendNotifyMessage 27 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\cpuz_x64.exe
    "C:\Users\Admin\AppData\Local\Temp\cpuz_x64.exe"
    1⤵
    • Writes to the Master Boot Record (MBR)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1736
    • C:\Windows\system32\NOTEPAD.EXE
      "C:\Windows\system32\NOTEPAD.EXE" C:\Windows\temp\cpuz_driver_1736.log
      2⤵
      • Opens file in notepad (likely ransom note)
      PID:868
  • C:\Windows\system32\taskmgr.exe
    "C:\Windows\system32\taskmgr.exe" /4
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:1584

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Windows\temp\cpuz_driver_1736.log
    Filesize

    2KB

    MD5

    cef7159c14b8a32347fee6b03361866d

    SHA1

    a8f0c9691c92d43d8be4d4273edb8fb96b2d79dc

    SHA256

    d8caacb6e86095b95b11ee366858390de5444fd553bbd02fa9595e78f5321cd2

    SHA512

    d7da58c4202c362934446ed497813fff11e311c6f080f819191941c4c949593ab61d416b663576ce398d0fa0ce25c04c74803cfdad0a39224c6eb230f904cf11

    Download Submit
  • memory/1584-99-0x0000000140000000-0x00000001405E8000-memory.dmp
    Filesize

    5.9MB

    Download
  • memory/1584-100-0x0000000140000000-0x00000001405E8000-memory.dmp
    Filesize

    5.9MB

    Download
  • memory/1584-101-0x00000000020D0000-0x00000000020D1000-memory.dmp
    Filesize

    4KB

    Download