Overview

overview

8

Static

static

3

uwd.exe

windows10-2004-x64

8

uwd.exe

windows11-21h2-x64

8

Analysis

  • max time kernel
    10s
  • max time network
    14s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240221-en
  • resource tags

    arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    07-03-2024 14:32

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General

  • Target

    uwd.exe

  • Size

    610KB

  • MD5

    49637e4ae02ad0066cd78eb0ea21ec9e

  • SHA1

    e875447cd5f5eb7c486a475eba97823678c29962

  • SHA256

    12bae61fbc85d233135b2364b34ece68bf578db4535c54cdfeb2c8ac67b08325

  • SHA512

    113b716aed397fb4a8cf19b412793fc0b1a1691922145f833692a8d8069a7e907c8b1e41b139453154b03023dd0ec3362d21e109753dd736d35e8c531da898be

  • SSDEEP

    12288:zN800y4lJOSdwJ9L4Abzc1LBWBZdnzhvc:x+ypWGfo1LBWBZpFc

Score
8/10
persistence

Malware Config

Signatures

  • Modifies Installed Components in the registry 2 TTPs 1 IoCs
    persistence
  • Loads dropped DLL 1 IoCs
  • Registers COM server for autorun 1 TTPs 2 IoCs
    persistence
  • Enumerates connected drives 3 TTPs 2 IoCs

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

  • Drops file in System32 directory 1 IoCs
  • Checks SCSI registry key(s) 3 TTPs 36 IoCs

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

  • Modifies registry class 11 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 11 IoCs
  • Suspicious use of FindShellTrayWindow 6 IoCs
  • Suspicious use of SendNotifyMessage 10 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\uwd.exe
    "C:\Users\Admin\AppData\Local\Temp\uwd.exe"
    1⤵
    • Registers COM server for autorun
    • Drops file in System32 directory
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:1368
    • C:\Windows\explorer.exe
      "C:\Windows\explorer.exe"
      2⤵
      • Modifies Installed Components in the registry
      • Loads dropped DLL
      • Enumerates connected drives
      • Checks SCSI registry key(s)
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      PID:2420
  • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
    "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
    1⤵
      PID:4612
    • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe
      "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe" -ServerName:CortanaUI.AppXstmwaab17q5s3y22tp6apqz7a45vwv65.mca
      1⤵
        PID:4388
      • C:\Windows\system32\LogonUI.exe
        "LogonUI.exe" /flags:0x4 /state0:0xa39d8855 /state1:0x41c64e6d
        1⤵
          PID:3744

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Windows\System32\painter_x64.dll
          Filesize

          7KB

          MD5

          8a91a913141f8758969991d1715369a9

          SHA1

          d59de6f8146ead378723bebc285bbb13b2aa6a7b

          SHA256

          550315a7cd9a929476d1b7dcf63072d1c405e2d15d29f9f9b1a6284a1aa34a47

          SHA512

          7471762efcbb7dbba9c140f03e31ca436522a11d3db8c3878f561b42c2c6995521e0350eda2d381dbfa1a9952491483ca9949c76c9b71593f3f281f0b858bdcb

          Download Submit

        • memory/1368-0-0x0000000002410000-0x0000000002411000-memory.dmp

          Filesize

          4KB

          Download

        • memory/1368-5-0x0000000000400000-0x000000000049F000-memory.dmp

          Filesize

          636KB

          Download