Overview

overview

8

Static

static

8

b2f5278a88...38.exe

windows7-x64

6

b2f5278a88...38.exe

windows10-2004-x64

8

Analysis

  • max time kernel
    162s
  • max time network
    180s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/12/2022, 12:27

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General

  • Target

    b2f5278a88eaaffcc74a0ef40065a8d7835db52165165b0e064b07a99aec3f38.exe

  • Size

    6.2MB

  • MD5

    23fbdd1f6e038ed005e248766c9cb4c4

  • SHA1

    17d871305d51302cb3a864bca9278d414e9dd6e0

  • SHA256

    b2f5278a88eaaffcc74a0ef40065a8d7835db52165165b0e064b07a99aec3f38

  • SHA512

    f5b661b09e1589f0d6f32060343c749da31ecdc37fb2152784998ae60484df8034e8c049ad31cba0a2661ec71e1a36a7b5f1445e842d2b829d685ba9774e2297

  • SSDEEP

    24576:a/1zmMUwO8+FIsVkabQfUsfXk5TdxzTDuGD:kGVFzPbat4ddTDuG

Score
8/10
bootkitpersistenceupx

Malware Config

Signatures

  • UPX packed file 1 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

    upx
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Enumerates connected drives 3 TTPs 22 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • 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.

  • Modifies data under HKEY_USERS 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of FindShellTrayWindow 31 IoCs
  • Suspicious use of SendNotifyMessage 25 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b2f5278a88eaaffcc74a0ef40065a8d7835db52165165b0e064b07a99aec3f38.exe
    "C:\Users\Admin\AppData\Local\Temp\b2f5278a88eaaffcc74a0ef40065a8d7835db52165165b0e064b07a99aec3f38.exe"
    1⤵
    • Adds Run key to start application
    • Enumerates connected drives
    • Writes to the Master Boot Record (MBR)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of SetWindowsHookEx
    PID:3924
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    PID:1436
  • C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe
    "C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe" /service
    1⤵
    • Modifies data under HKEY_USERS
    • Suspicious use of SetWindowsHookEx
    PID:3412
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    PID:4720
  • C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe
    "C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe" /service
    1⤵
    • Modifies data under HKEY_USERS
    • Suspicious use of SetWindowsHookEx
    PID:4956
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    PID:3808
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    PID:1904
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    PID:2208
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    PID:4668

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/3924-132-0x0000000000400000-0x0000000000A2E000-memory.dmp

    Filesize

    6.2MB

    Download

  • memory/3924-133-0x0000000000400000-0x0000000000A2E000-memory.dmp

    Filesize

    6.2MB

    Download

  • memory/3924-135-0x00000000010F0000-0x00000000010F8000-memory.dmp

    Filesize

    32KB

    Download

  • memory/3924-136-0x0000000000400000-0x0000000000A2E000-memory.dmp

    Filesize

    6.2MB

    Download

  • memory/3924-137-0x0000000000400000-0x0000000000A2E000-memory.dmp

    Filesize

    6.2MB

    Download