Analysis

  • max time kernel
    78s
  • max time network
    92s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12/06/2024, 16:41

General

  • Target

    $PLUGINSDIR/System.dll

  • Size

    124KB

  • MD5

    a5aba2154379a3272c28df43ad342017

  • SHA1

    caaa0fdb1e6aa4369a6b2c751f7bed89f7fd5d8d

  • SHA256

    ab8e9bff458b2e07c0d8ea42b473303b6a6199a9d549401049006b0bc807a9e2

  • SHA512

    530121bacbfc8c08bc214f434a2e6e4a8e7b48078c771456f8d0f00b8a07b86de2a248e7cbc8f10f0fc4354519cc990a93ae3b1beae00426cecfb63a037b9d29

  • SSDEEP

    1536:xIfbm6gv1TPn3QvVIaoAsvVSeSesAdHXjgGkP/jCKQmF3FYkcnvTY1rM:+finznHXxSe7znkD5p5FYtbY1o

Malware Config

Signatures

  • Ramnit

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

  • Executes dropped EXE 4 IoCs
  • UPX packed file 10 IoCs

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

  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 8 IoCs
  • Program crash 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 40 IoCs
  • Suspicious behavior: EnumeratesProcesses 24 IoCs
  • Suspicious use of FindShellTrayWindow 3 IoCs
  • Suspicious use of SetWindowsHookEx 14 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1016
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1
      2⤵
      • Drops file in System32 directory
      • Suspicious use of WriteProcessMemory
      PID:5016
      • C:\Windows\SysWOW64\rundll32Srv.exe
        C:\Windows\SysWOW64\rundll32Srv.exe
        3⤵
        • Executes dropped EXE
        • Drops file in System32 directory
        • Drops file in Program Files directory
        • Suspicious use of WriteProcessMemory
        PID:3524
        • C:\Windows\SysWOW64\rundll32SrvSrv.exe
          C:\Windows\SysWOW64\rundll32SrvSrv.exe
          4⤵
          • Executes dropped EXE
          • Drops file in Program Files directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2944
          • C:\Program Files\Internet Explorer\iexplore.exe
            "C:\Program Files\Internet Explorer\iexplore.exe"
            5⤵
            • Modifies Internet Explorer settings
            • Suspicious use of FindShellTrayWindow
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:2920
            • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
              "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2920 CREDAT:17410 /prefetch:2
              6⤵
              • Modifies Internet Explorer settings
              • Suspicious use of SetWindowsHookEx
              PID:3036
        • C:\Program Files (x86)\Microsoft\DesktopLayer.exe
          "C:\Program Files (x86)\Microsoft\DesktopLayer.exe"
          4⤵
          • Executes dropped EXE
          • Drops file in Program Files directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1648
          • C:\Program Files (x86)\Microsoft\DesktopLayerSrv.exe
            "C:\Program Files (x86)\Microsoft\DesktopLayerSrv.exe"
            5⤵
            • Executes dropped EXE
            • Drops file in Program Files directory
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of WriteProcessMemory
            PID:4928
            • C:\Program Files\Internet Explorer\iexplore.exe
              "C:\Program Files\Internet Explorer\iexplore.exe"
              6⤵
              • Modifies Internet Explorer settings
              • Suspicious use of FindShellTrayWindow
              • Suspicious use of SetWindowsHookEx
              • Suspicious use of WriteProcessMemory
              PID:4960
              • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
                "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:4960 CREDAT:17410 /prefetch:2
                7⤵
                • Modifies Internet Explorer settings
                • Suspicious use of SetWindowsHookEx
                PID:4428
          • C:\Program Files\Internet Explorer\iexplore.exe
            "C:\Program Files\Internet Explorer\iexplore.exe"
            5⤵
            • Modifies Internet Explorer settings
            • Suspicious use of FindShellTrayWindow
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:3468
            • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
              "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:3468 CREDAT:17410 /prefetch:2
              6⤵
              • Modifies Internet Explorer settings
              • Suspicious use of SetWindowsHookEx
              PID:1952
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 5016 -s 620
        3⤵
        • Program crash
        PID:4048
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 5016 -ip 5016
    1⤵
      PID:2332

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

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

            Filesize

            55KB

            MD5

            ff5e1f27193ce51eec318714ef038bef

            SHA1

            b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6

            SHA256

            fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320

            SHA512

            c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a

          • C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{AFA906E0-28DA-11EF-BA70-E659512317F8}.dat

            Filesize

            5KB

            MD5

            8421054041c760fba1c200a3a43c4c81

            SHA1

            55be6b5247b40c773bb855d998a5adb9b92ba8e1

            SHA256

            44dd862f9bdb1563af429238d0b62a5e89ca03a7d5e5a5ec9b77248b2432aaa1

            SHA512

            e3ba7d2ad2c50b3824dee0acfbf0c8591632229ce5c1bf7abefb1c864f38201a90f57b5a4849e150429e0c266251702458c9af97a7dc653063c0192c270b0467

          • C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{AFADCBE2-28DA-11EF-BA70-E659512317F8}.dat

            Filesize

            3KB

            MD5

            2072c1890914682d64a08394a9d09968

            SHA1

            c6d7a9844b8d6315e3941c45225f72248563d32e

            SHA256

            af31c4215e30914e44a1cf75c3e298bb1d7e8429582563d121dac5bf3f2d0aa5

            SHA512

            16e8ba0d25f3d35360cc811b0e80ab4c0b6f7e538af779c001d1946422d9e69c0a0c1e719105c2e51f42ba13dc2effb3ab63cd993f351f9f8799fd1b09841e18

          • C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{AFB29079-28DA-11EF-BA70-E659512317F8}.dat

            Filesize

            5KB

            MD5

            2572cff95161dd3969619ff1218d396c

            SHA1

            3586f87a345cddda685afdfc6a2ac194745ee4a0

            SHA256

            6da9d98759bcd8da9f8c52a097afa931c624fec7c2a6496dcf6f68ccc9283fa8

            SHA512

            a61002b515fc60ace21b5ec4cb7055d75b41eec5b982fac101c9a836b6e1e161d1f9a42023521fd32c9c171db1f671ac699d1ec1816565158bf3a998e3ce6167

          • C:\Windows\SysWOW64\rundll32Srv.exe

            Filesize

            111KB

            MD5

            309d79d766e9b9025d15adc1aa5ecf52

            SHA1

            cd2b67a54850229ea8b1e8b82270ccdf0bb088e8

            SHA256

            3d3a07dcc43505b2ecafaa8fc4164a70f66a234c894a7f902444a6fa82e07868

            SHA512

            63cfcfe9ebfd634a1a248eca12d174854c5d828d2e610fb3f65e9a5d5106969f212ec466933e4d6afee2e5e4cd31998ea844c0c1f4ccdd78fa10a24650567308

          • memory/1648-30-0x0000000000400000-0x000000000043D000-memory.dmp

            Filesize

            244KB

          • memory/1648-24-0x0000000000400000-0x000000000043D000-memory.dmp

            Filesize

            244KB

          • memory/1648-23-0x0000000000570000-0x0000000000571000-memory.dmp

            Filesize

            4KB

          • memory/2944-17-0x0000000000400000-0x000000000042E000-memory.dmp

            Filesize

            184KB

          • memory/2944-13-0x0000000000400000-0x000000000042E000-memory.dmp

            Filesize

            184KB

          • memory/2944-16-0x0000000000400000-0x000000000042E000-memory.dmp

            Filesize

            184KB

          • memory/2944-15-0x00000000004D0000-0x00000000004D1000-memory.dmp

            Filesize

            4KB

          • memory/3524-11-0x0000000000570000-0x000000000057F000-memory.dmp

            Filesize

            60KB

          • memory/3524-12-0x0000000000400000-0x000000000043D000-memory.dmp

            Filesize

            244KB

          • memory/3524-5-0x0000000000400000-0x000000000043D000-memory.dmp

            Filesize

            244KB

          • memory/4928-28-0x00000000004A0000-0x00000000004A1000-memory.dmp

            Filesize

            4KB

          • memory/4928-31-0x0000000000400000-0x000000000042E000-memory.dmp

            Filesize

            184KB

          • memory/5016-1-0x0000000010000000-0x0000000010023000-memory.dmp

            Filesize

            140KB

          • memory/5016-33-0x0000000010000000-0x0000000010023000-memory.dmp

            Filesize

            140KB