Analysis

  • max time kernel
    120s
  • max time network
    133s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    07/05/2024, 03:11

General

  • Target

    uninst.exe

  • Size

    289KB

  • MD5

    62d59d949c8738764fb4e0c440fc0d3b

  • SHA1

    cc0d44be6faa84393a3ce3e1e725a95d5a662ce4

  • SHA256

    c9a35e11c82fe4df61b96a9c57b20bdd59a5903a67a59c6e9156d303450afc61

  • SHA512

    1587f863992d1ab62029d033551f3d567c9716738dfc4ca90f6cf9f7a034925d9a019cee1fed839b51db7c187eaa230b79a8f47f2eb0d22232bbb9cf7347b9e5

  • SSDEEP

    6144:Ie34RTXlHyCn4ik6yiUfFY2SzpYn2/gnqqjG:kTVFkJy2Sz6n2/

Score
7/10

Malware Config

Signatures

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 3 IoCs
  • 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.

  • Enumerates physical storage devices 1 TTPs

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

  • NSIS installer 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\uninst.exe
    "C:\Users\Admin\AppData\Local\Temp\uninst.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1440
    • C:\Users\Admin\AppData\Local\Temp\~nsu.tmp\Au_.exe
      "C:\Users\Admin\AppData\Local\Temp\~nsu.tmp\Au_.exe" _?=C:\Users\Admin\AppData\Local\Temp\
      2⤵
      • Deletes itself
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of WriteProcessMemory
      PID:1224
      • C:\Users\Admin\AppData\Local\Temp\yj_dtsk.exe
        "C:\Users\Admin\AppData\Local\Temp\yj_dtsk.exe" /uninstallsucc
        3⤵
        • Writes to the Master Boot Record (MBR)
        • Suspicious behavior: EnumeratesProcesses
        PID:2096

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\lander.ini

          Filesize

          439B

          MD5

          5ac808ed7aa482e21ef198bf27bd99f8

          SHA1

          f30f9f06d64ef4690259d02afc13f27ce2a34003

          SHA256

          3461f6954479e0861b65a54e9e6202608308388c119201811abd543394215194

          SHA512

          05d894f90b7961c3a80baac6e2bd8f01e24ef07117bc61d822c50c3b4c216305ffaf1696b10048607ebf88ce66b93536cd15d6b5319778ca115dbc371c5f924c

        • \Users\Admin\AppData\Local\Temp\nsjA92C.tmp\FindProcDLL.dll

          Filesize

          3KB

          MD5

          8614c450637267afacad1645e23ba24a

          SHA1

          e7b7b09b5bbc13e910aa36316d9cc5fc5d4dcdc2

          SHA256

          0fa04f06a6de18d316832086891e9c23ae606d7784d5d5676385839b21ca2758

          SHA512

          af46cd679097584ff9a1d894a729b6397f4b3af17dff3e6f07bef257bc7e48ffa341d82daf298616cd5df1450fc5ab7435cacb70f27302b6db193f01a9f8391b

        • \Users\Admin\AppData\Local\Temp\nsjA92C.tmp\inetc.dll

          Filesize

          20KB

          MD5

          c498ae64b4971132bba676873978de1e

          SHA1

          92e4009cd776b6c8616d8bffade7668ef3cb3c27

          SHA256

          5552bdde7e4113393f683ef501e4cc84dccc071bdc51391ea7fa3e7c1d49e4e8

          SHA512

          8e5ca35493f749a39ceae6796d2658ba10f7d8d9ceca45bb4365b338fabd1dfa9b9f92e33f50c91b0273e66adfbce4b98b09c15fd2473f8b214ed797462333d7

        • \Users\Admin\AppData\Local\Temp\~nsu.tmp\Au_.exe

          Filesize

          289KB

          MD5

          62d59d949c8738764fb4e0c440fc0d3b

          SHA1

          cc0d44be6faa84393a3ce3e1e725a95d5a662ce4

          SHA256

          c9a35e11c82fe4df61b96a9c57b20bdd59a5903a67a59c6e9156d303450afc61

          SHA512

          1587f863992d1ab62029d033551f3d567c9716738dfc4ca90f6cf9f7a034925d9a019cee1fed839b51db7c187eaa230b79a8f47f2eb0d22232bbb9cf7347b9e5

        • memory/1224-12-0x0000000010000000-0x0000000010003000-memory.dmp

          Filesize

          12KB