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Analysis

  • max time kernel
    94s
  • max time network
    112s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/01/2025, 18:35

General

  • Target

    $PLUGINSDIR/nsRandom.dll

  • Size

    77KB

  • MD5

    d86b2899f423931131b696ff659aa7ed

  • SHA1

    007ca98f5d7921fe26fb9b8bd8a822dd5ae09ed6

  • SHA256

    8935cba8e9b276daa357a809e0eca3bebf3fdc6d0d3466ab37fb2cbbfacd3a94

  • SHA512

    9a4437ab484e4e22597c642d21b0107a063a208a582df3a5bf276466ad8d0ba9aeebac6de8dcf1372939984bb187d58e94c799918cfbe80e85c958bf0a537fc7

  • SSDEEP

    1536:/lKXi95r2UwOpUtoqoQvfDrghNT+2w8mbJ1/NfSttVx:sgr2eGoqVvbaNXubJ1JI

Malware Config

Signatures

  • Ramnit

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

  • Ramnit family
  • Executes dropped EXE 2 IoCs
  • Drops file in System32 directory 1 IoCs
  • UPX packed file 8 IoCs

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

  • Drops file in Program Files directory 3 IoCs
  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies Internet Explorer settings 1 TTPs 26 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\nsRandom.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3568
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\nsRandom.dll,#1
      2⤵
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4344
      • C:\Windows\SysWOW64\rundll32Srv.exe
        C:\Windows\SysWOW64\rundll32Srv.exe
        3⤵
        • Executes dropped EXE
        • Drops file in Program Files directory
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4204
        • C:\Program Files (x86)\Microsoft\DesktopLayer.exe
          "C:\Program Files (x86)\Microsoft\DesktopLayer.exe"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1756
          • 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:1048
            • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
              "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1048 CREDAT:17410 /prefetch:2
              6⤵
              • System Location Discovery: System Language Discovery
              • Modifies Internet Explorer settings
              • Suspicious use of SetWindowsHookEx
              PID:4408
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4344 -s 628
        3⤵
        • Program crash
        PID:1608
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4344 -ip 4344
    1⤵
      PID:4304

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

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

      Filesize

      471B

      MD5

      ce36378334f2edb4e728e0632afebb70

      SHA1

      89d54efcb8c7bbe532e5ad91b38468279d3f5c93

      SHA256

      6be47a3ecfbf81a123c297ee65d70177b4010bfbe728b94b4337453683b9a6e1

      SHA512

      3e09cc9ece1907c072f02f768ec749ceef3b8913f394bb075b1948d0409b7910670b91da7d35160c211d0bf8df05e83409a1ad7493ea53864c41f37305f75aa2

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

      Filesize

      404B

      MD5

      cf1b5975cad431512a52e29a11868987

      SHA1

      ab04a29015b892ac83fce6dd4a73cc04b6de7840

      SHA256

      267c375c1c2ff2fba8832f4f299c7c52df5e222c2bf74858bd6110526873f5ee

      SHA512

      51f607ffeb321344b0d43d85bd9fc25970109f381105a0191f7c7cc0dde3f2679061748b4cebd26b198aa010cd9651abb5516b4812d15100191f65bef734a1fc

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\PGH3GSHW\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/1756-16-0x0000000000520000-0x0000000000521000-memory.dmp

      Filesize

      4KB

    • memory/1756-14-0x0000000000400000-0x000000000042E000-memory.dmp

      Filesize

      184KB

    • memory/1756-12-0x0000000000400000-0x000000000042E000-memory.dmp

      Filesize

      184KB

    • memory/1756-15-0x0000000000400000-0x000000000042E000-memory.dmp

      Filesize

      184KB

    • memory/4204-5-0x00000000005A0000-0x00000000005AF000-memory.dmp

      Filesize

      60KB

    • memory/4204-7-0x0000000000400000-0x000000000042E000-memory.dmp

      Filesize

      184KB

    • memory/4204-4-0x0000000000400000-0x000000000042E000-memory.dmp

      Filesize

      184KB

    • memory/4344-19-0x0000000000400000-0x0000000000421000-memory.dmp

      Filesize

      132KB

    • memory/4344-0-0x0000000000400000-0x0000000000421000-memory.dmp

      Filesize

      132KB