Analysis

  • max time kernel
    136s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220331-en
  • submitted
    11-04-2022 03:05

General

  • Target

    %E5%88%9B%E8%BE%89%E4%BC%81%E4%B8%9A%E5%90%8D%E5%BD%95%E4%BF%A1%E6%81%AF%E6%90%9C%E7%B4%A2%E8%BD%AF%E4%BB%B6.exe

  • Size

    968KB

  • MD5

    b002b1aef58889242163dba60b7d6a47

  • SHA1

    360b5a679662061f20778d12a668ceb204179f00

  • SHA256

    4e707c27c365409032b8081092276d83498149589fa42c52271febbc5682bc81

  • SHA512

    ccdf7add0ccc3a9c9b8a98683a04deaa1fa5197a4002276f92bc303042a1c824cbd80706d5522d676fc907f7625673d2d8ae3a4c945be3fb62bdf92dfa185ec7

Malware Config

Signatures

  • Ramnit

    Ramnit is a versatile family that holds viruses, worms, and Trojans.

  • Executes dropped EXE 2 IoCs
  • UPX packed file 29 IoCs

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

  • 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.

  • Drops file in Program Files directory 3 IoCs
  • Modifies Internet Explorer settings 1 TTPs 28 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 9 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\%E5%88%9B%E8%BE%89%E4%BC%81%E4%B8%9A%E5%90%8D%E5%BD%95%E4%BF%A1%E6%81%AF%E6%90%9C%E7%B4%A2%E8%BD%AF%E4%BB%B6.exe
    "C:\Users\Admin\AppData\Local\Temp\%E5%88%9B%E8%BE%89%E4%BC%81%E4%B8%9A%E5%90%8D%E5%BD%95%E4%BF%A1%E6%81%AF%E6%90%9C%E7%B4%A2%E8%BD%AF%E4%BB%B6.exe"
    1⤵
    • Writes to the Master Boot Record (MBR)
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2252
    • C:\Users\Admin\AppData\Local\Temp\%E5%88%9B%E8%BE%89%E4%BC%81%E4%B8%9A%E5%90%8D%E5%BD%95%E4%BF%A1%E6%81%AF%E6%90%9C%E7%B4%A2%E8%BD%AF%E4%BB%B6Srv.exe
      C:\Users\Admin\AppData\Local\Temp\%E5%88%9B%E8%BE%89%E4%BC%81%E4%B8%9A%E5%90%8D%E5%BD%95%E4%BF%A1%E6%81%AF%E6%90%9C%E7%B4%A2%E8%BD%AF%E4%BB%B6Srv.exe
      2⤵
      • Executes dropped EXE
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:2132
      • C:\Program Files (x86)\Microsoft\DesktopLayer.exe
        "C:\Program Files (x86)\Microsoft\DesktopLayer.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:3948
        • C:\Program Files\Internet Explorer\iexplore.exe
          "C:\Program Files\Internet Explorer\iexplore.exe"
          4⤵
          • Modifies Internet Explorer settings
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:1448
          • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
            "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1448 CREDAT:17410 /prefetch:2
            5⤵
            • Modifies Internet Explorer settings
            • Suspicious use of SetWindowsHookEx
            PID:1212

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Bootkit

1
T1067

Defense Evasion

Modify Registry

1
T1112

Replay Monitor

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Downloads

  • C:\Program Files (x86)\Microsoft\DesktopLayer.exe
    Filesize

    55KB

    MD5

    ff5e1f27193ce51eec318714ef038bef

    SHA1

    b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6

    SHA256

    fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320

    SHA512

    c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a

  • C:\Program Files (x86)\Microsoft\DesktopLayer.exe
    Filesize

    55KB

    MD5

    ff5e1f27193ce51eec318714ef038bef

    SHA1

    b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6

    SHA256

    fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320

    SHA512

    c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a

  • C:\Users\Admin\AppData\Local\Temp\%E5%88%9B%E8%BE%89%E4%BC%81%E4%B8%9A%E5%90%8D%E5%BD%95%E4%BF%A1%E6%81%AF%E6%90%9C%E7%B4%A2%E8%BD%AF%E4%BB%B6Srv.exe
    Filesize

    55KB

    MD5

    ff5e1f27193ce51eec318714ef038bef

    SHA1

    b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6

    SHA256

    fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320

    SHA512

    c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a

  • C:\Users\Admin\AppData\Local\Temp\%E5%88%9B%E8%BE%89%E4%BC%81%E4%B8%9A%E5%90%8D%E5%BD%95%E4%BF%A1%E6%81%AF%E6%90%9C%E7%B4%A2%E8%BD%AF%E4%BB%B6Srv.exe
    Filesize

    55KB

    MD5

    ff5e1f27193ce51eec318714ef038bef

    SHA1

    b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6

    SHA256

    fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320

    SHA512

    c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a

  • memory/2132-124-0x0000000000000000-mapping.dmp
  • memory/2132-129-0x0000000000400000-0x000000000042E000-memory.dmp
    Filesize

    184KB

  • memory/2252-160-0x0000000010000000-0x000000001003D000-memory.dmp
    Filesize

    244KB

  • memory/2252-150-0x0000000010000000-0x000000001003D000-memory.dmp
    Filesize

    244KB

  • memory/2252-176-0x0000000010000000-0x000000001003D000-memory.dmp
    Filesize

    244KB

  • memory/2252-174-0x0000000010000000-0x000000001003D000-memory.dmp
    Filesize

    244KB

  • memory/2252-134-0x0000000010000000-0x000000001003D000-memory.dmp
    Filesize

    244KB

  • memory/2252-130-0x0000000010000000-0x000000001003D000-memory.dmp
    Filesize

    244KB

  • memory/2252-172-0x0000000010000000-0x000000001003D000-memory.dmp
    Filesize

    244KB

  • memory/2252-138-0x0000000010000000-0x000000001003D000-memory.dmp
    Filesize

    244KB

  • memory/2252-140-0x0000000010000000-0x000000001003D000-memory.dmp
    Filesize

    244KB

  • memory/2252-142-0x0000000010000000-0x000000001003D000-memory.dmp
    Filesize

    244KB

  • memory/2252-144-0x0000000010000000-0x000000001003D000-memory.dmp
    Filesize

    244KB

  • memory/2252-146-0x0000000010000000-0x000000001003D000-memory.dmp
    Filesize

    244KB

  • memory/2252-148-0x0000000010000000-0x000000001003D000-memory.dmp
    Filesize

    244KB

  • memory/2252-136-0x0000000010000000-0x000000001003D000-memory.dmp
    Filesize

    244KB

  • memory/2252-152-0x0000000010000000-0x000000001003D000-memory.dmp
    Filesize

    244KB

  • memory/2252-154-0x0000000010000000-0x000000001003D000-memory.dmp
    Filesize

    244KB

  • memory/2252-156-0x0000000010000000-0x000000001003D000-memory.dmp
    Filesize

    244KB

  • memory/2252-158-0x0000000010000000-0x000000001003D000-memory.dmp
    Filesize

    244KB

  • memory/2252-170-0x0000000010000000-0x000000001003D000-memory.dmp
    Filesize

    244KB

  • memory/2252-162-0x0000000010000000-0x000000001003D000-memory.dmp
    Filesize

    244KB

  • memory/2252-164-0x0000000010000000-0x000000001003D000-memory.dmp
    Filesize

    244KB

  • memory/2252-168-0x0000000010000000-0x000000001003D000-memory.dmp
    Filesize

    244KB

  • memory/2252-166-0x0000000010000000-0x000000001003D000-memory.dmp
    Filesize

    244KB

  • memory/3948-127-0x0000000000000000-mapping.dmp
  • memory/3948-133-0x0000000000610000-0x0000000000611000-memory.dmp
    Filesize

    4KB

  • memory/3948-132-0x0000000000600000-0x000000000060F000-memory.dmp
    Filesize

    60KB

  • memory/3948-135-0x0000000000400000-0x000000000042E000-memory.dmp
    Filesize

    184KB