Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/06/2024, 12:11

General

  • Target
    UrlUpdate.exe
  • Size 152KB
  • Sample240620-pczehs1bpr
  • SHA256 94a6a81ad5c12aec33d7274e43ed8197cd476bb9680724995631fd971e8a3d86
  • MD5 SHA1 SHA512 SSDEEP
Score
7/10

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Installs/modifies Browser Helper Object 2 TTPs 5 IoCs

    BHOs are DLL modules which act as plugins for Internet Explorer.

  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 1 IoCs
  • Launches sc.exe 1 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Modifies Internet Explorer settings 1 TTPs 24 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\UrlUpdate.exe
    "C:\Users\Admin\AppData\Local\Temp\UrlUpdate.exe"
    1⤵
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2908
    • C:\Users\Admin\AppData\Local\Temp\urlupdate1.exe
      C:\Users\Admin\AppData\Local\Temp\urlupdate1.exe
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3104
      • C:\Users\Admin\AppData\Local\Temp\ntmurl.exe
        C:\Users\Admin\AppData\Local\Temp\ntmurl.exe install scope addressbar
        3⤵
        • Installs/modifies Browser Helper Object
        • Drops file in System32 directory
        • Drops file in Program Files directory
        • Modifies Internet Explorer settings
        • Modifies registry class
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1724
        • C:\Windows\SysWOW64\regsvr32.exe
          regsvr32.exe /s "C:\Users\Admin\AppData\Local\Temp\ntmurl.dll"
          4⤵
          • Modifies registry class
          PID:4908
        • C:\Users\Admin\AppData\Local\Temp\nnlogon.exe
          "C:\Users\Admin\AppData\Local\Temp\nnlogon.exe" -i
          4⤵
            PID:3924
          • C:\Windows\SysWOW64\sc.exe
            sc start efinderservice
            4⤵
            • Launches sc.exe
            PID:3612
          • C:\Windows\SysWOW64\regsvr32.exe
            regsvr32.exe /s "C:\Users\Admin\AppData\Local\Temp\efsbar.dll"
            4⤵
            • Modifies registry class
            PID:4896
          • C:\Windows\SysWOW64\REG.exe
            REG IMPORT "C:\Users\Admin\AppData\Local\Temp\sbinstall.reg"
            4⤵
            • Installs/modifies Browser Helper Object
            • Modifies Internet Explorer settings
            PID:556
          • C:\Windows\SysWOW64\REG.exe
            REG IMPORT "C:\Users\Admin\AppData\Local\Temp\sbinstall.reg"
            4⤵
            • Modifies Internet Explorer settings
            PID:2504
          • C:\Windows\SysWOW64\REG.exe
            REG IMPORT "C:\Users\Admin\AppData\Local\Temp\bbuninstall.reg"
            4⤵
              PID:2032
            • C:\Windows\SysWOW64\REG.exe
              REG IMPORT "C:\Users\Admin\AppData\Local\Temp\appext.reg"
              4⤵
              • Modifies Internet Explorer settings
              PID:4288
            • C:\Users\Admin\AppData\Local\Temp\iewindow.exe
              C:\Users\Admin\AppData\Local\Temp\iewindow.exe
              4⤵
              • Suspicious use of SetWindowsHookEx
              PID:2852
      • C:\Users\Admin\AppData\Local\Temp\nnlogon.exe
        C:\Users\Admin\AppData\Local\Temp\nnlogon.exe
        1⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2316
        • C:\Users\Admin\AppData\Local\Temp\UrlUpdate.exe
          C:\Users\Admin\AppData\Local\Temp\UrlUpdate.exe
          2⤵
          • Suspicious use of SetWindowsHookEx
          PID:3736

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            appext.reg

            • Path C:\Users\Admin\AppData\Local\Temp\appext.reg
            • Size 1KB
            • SHA256 c23dc16f219dc1c20150075a49484c443913e64b3b0f1dddf93a48e66af8d406
            • MD5 SHA1 SHA512

            autoup.ini

            • Path C:\Users\Admin\AppData\Local\Temp\autoup.ini
            • Size 754B
            • SHA256 c75f48b727d55d10b053ad1f0b11d1c02ae10f5ff7805241f985c4d7e7aa013c
            • MD5 SHA1 SHA512

            bbuninstall.reg

            • Path C:\Users\Admin\AppData\Local\Temp\bbuninstall.reg
            • Size 442B
            • SHA256 3f0c9bf08a9cdcdb96c2401271dc2bf0316adc6d4b01dde12c0d9da32594690d
            • MD5 SHA1 SHA512

            nautoup.log

            • Path C:\Users\Admin\AppData\Local\Temp\nautoup.log
            • Size 584B
            • SHA256 6059c8e64f71e5ebe3d8fbb6197ef01091095e3bd1ab065ae726616b793cf290
            • MD5 SHA1 SHA512

            nnlogon.ini

            • Path C:\Users\Admin\AppData\Local\Temp\nnlogon.ini
            • Size 324B
            • SHA256 3447a237c8d3c323476c6546a6fa915c12e6dc09741428c4f0062412cabedd7d
            • MD5 SHA1 SHA512

            nnlogon.log

            • Path C:\Users\Admin\AppData\Local\Temp\nnlogon.log
            • Size 382B
            • SHA256 59675f2e6c13a7cb80ff3f7f1a14a35b5d5a7639740cb03b3a09c78922225db5
            • MD5 SHA1 SHA512

            nnlogon.log

            • Path C:\Users\Admin\AppData\Local\Temp\nnlogon.log
            • Size 623B
            • SHA256 ce77b91cf729e56499153f1f67ecd4837fc1c5300b7c08ad7907c3840ce87086
            • MD5 SHA1 SHA512

            nnlogon.log

            • Path C:\Users\Admin\AppData\Local\Temp\nnlogon.log
            • Size 902B
            • SHA256 426eaac2896eb60b60c197c3f519a271cc3966a18ac000fb037f0e5281a3f8cf
            • MD5 SHA1 SHA512

            sbinstall.reg

            • Path C:\Users\Admin\AppData\Local\Temp\sbinstall.reg
            • Size 830B
            • SHA256 a89c9dcc2775d7b98f177fd55c553e5b00d1800a59322e1e1e854a79620868ae
            • MD5 SHA1 SHA512

            sbinstall.reg

            • Path C:\Users\Admin\AppData\Local\Temp\sbinstall.reg
            • Size 324B
            • SHA256 2e58e8a351d814537317d27c339272ec69e611daa63c7df80a3dc8666096fc98
            • MD5 SHA1 SHA512

            tags.mdb

            • Path C:\Users\Admin\AppData\Local\Temp\tags.mdb
            • Size 232KB
            • SHA256 c6e3f64ebaf43964a00c98796522b085343dfe2529b0dfe1bc36fd5756a39d0a
            • MD5 SHA1 SHA512 SSDEEP

            urlupdate1.exe

            • Path C:\Users\Admin\AppData\Local\Temp\urlupdate1.exe
            • Size 152KB
            • SHA256 94a6a81ad5c12aec33d7274e43ed8197cd476bb9680724995631fd971e8a3d86
            • MD5 SHA1 SHA512 SSDEEP

            nautoup.log

            • Path C:\nautoup.log
            • Size 218B
            • SHA256 7b2fe12a63aa0b255d7a8b03f1985c62aa6ff5b440bb60e29841b5cecebaae73
            • MD5 SHA1 SHA512

            nautoup.log

            • Path C:\nautoup.log
            • Size 265B
            • SHA256 f06defcb1a491b48e22bf9b56a165b39a3b8274e11c0049edf73487bb42ae13e
            • MD5 SHA1 SHA512