Analysis

  • max time kernel
    129s
  • max time network
    143s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-05-2024 19:09

General

  • Target

    $PLUGINSDIR/MyNsisExtend.dll

  • Size

    596KB

  • MD5

    37e4e1ab9aee0596c2fa5888357a63b0

  • SHA1

    a5dba8c0a1bd936dca2b6a81f2dc9a3005f1a2b6

  • SHA256

    ff4b245fea98cedd881ca102468623a449a0b40df0c557dd8a6ea32e788d56fe

  • SHA512

    5cbab2872683079c6cc09423a2baf7107b5ac5731f336cd237fa93a4a4ee53a127963dc0ec0dbc6168b9b3d2c3a881c7663ce4ecd84d964628dd566395d49bb3

  • SSDEEP

    12288:1QXznhWxifqPG8yDAay0BQeMrtQW27ZJ6ObWTE5lqtmsVsIdj:1QXznYybPJnWTE5lqwsKG

Malware Config

Signatures

  • Ramnit

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

  • Executes dropped EXE 2 IoCs
  • UPX packed file 5 IoCs

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

  • Drops file in System32 directory 1 IoCs
  • Drops file in Program Files directory 3 IoCs
  • Program crash 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 30 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 6 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\MyNsisExtend.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3452
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\MyNsisExtend.dll,#1
      2⤵
      • Drops file in System32 directory
      • Suspicious use of WriteProcessMemory
      PID:2788
      • C:\Windows\SysWOW64\rundll32Srv.exe
        C:\Windows\SysWOW64\rundll32Srv.exe
        3⤵
        • Executes dropped EXE
        • Drops file in Program Files directory
        • Suspicious use of WriteProcessMemory
        PID:2516
        • C:\Program Files (x86)\Microsoft\DesktopLayer.exe
          "C:\Program Files (x86)\Microsoft\DesktopLayer.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2192
          • 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:3148
            • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
              "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:3148 CREDAT:17410 /prefetch:2
              6⤵
              • Modifies Internet Explorer settings
              • Suspicious use of SetWindowsHookEx
              PID:3260
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 2788 -s 652
        3⤵
        • Program crash
        PID:1180
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2788 -ip 2788
    1⤵
      PID:2328

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776

      Filesize

      471B

      MD5

      c41ab5352ba79baac9ac093dd7eb2500

      SHA1

      1ffb0e70f86845daba211aeda43cad539d34ffd3

      SHA256

      558e13bb7aa293569457e9703d2db37e8365e2ab670b2c3484ada9336ed24895

      SHA512

      ccebe3f11039e14d39d4102652669fd372d179778bf73fae0659dd01da569bbf850b273cd3a4e13dc77b3fd4fb4d84d01525ac3a0dcb23b297c733da10bc2ff0

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776

      Filesize

      404B

      MD5

      ecdb490de2e24ddfa0bb0a311aa76cf3

      SHA1

      767ef1b685c23ec77dcf7c95076d70eb8070cf72

      SHA256

      7e8e501dd38f9eb9772199aa5210621b050f502571d99e3ba9f7721f49b59f9f

      SHA512

      253966dce88e907a7da4cad08aafb5457a9fcd14a4d559203872905981584f124e3ea72803783799de51b719c99fd6d6b401f8c3be229c8fe487c82f41dda009

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\YB09K3UP\suggestions[1].en-US

      Filesize

      17KB

      MD5

      5a34cb996293fde2cb7a4ac89587393a

      SHA1

      3c96c993500690d1a77873cd62bc639b3a10653f

      SHA256

      c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad

      SHA512

      e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee

    • C:\Windows\SysWOW64\rundll32Srv.exe

      Filesize

      55KB

      MD5

      ff5e1f27193ce51eec318714ef038bef

      SHA1

      b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6

      SHA256

      fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320

      SHA512

      c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a

    • memory/2192-15-0x0000000000400000-0x000000000042E000-memory.dmp

      Filesize

      184KB

    • memory/2192-13-0x0000000000590000-0x0000000000591000-memory.dmp

      Filesize

      4KB

    • memory/2192-14-0x0000000000400000-0x000000000042E000-memory.dmp

      Filesize

      184KB

    • memory/2516-4-0x0000000000400000-0x000000000042E000-memory.dmp

      Filesize

      184KB

    • memory/2516-7-0x0000000000400000-0x000000000042E000-memory.dmp

      Filesize

      184KB

    • memory/2516-6-0x00000000004C0000-0x00000000004CF000-memory.dmp

      Filesize

      60KB

    • memory/2788-1-0x0000000010000000-0x000000001009A000-memory.dmp

      Filesize

      616KB

    • memory/2788-17-0x0000000010000000-0x000000001009A000-memory.dmp

      Filesize

      616KB