Analysis

  • max time kernel
    150s
  • max time network
    159s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-12-2024 23:59

General

  • Target

    81323fd94b1390b66662692f8c2104024d2cf9ab761763fd8ec497b5d4c577d4.dll

  • Size

    584KB

  • MD5

    b67f234d2aff8a0ed8545bf5bb9f4f88

  • SHA1

    3db9eb3cec3df79a4adc7cc7394cfcb1f9e0be63

  • SHA256

    81323fd94b1390b66662692f8c2104024d2cf9ab761763fd8ec497b5d4c577d4

  • SHA512

    fbca5c0f05009e7388bbd2bf14de63065326c2abf7807bee72861a9dc055548ac3e6d42fa7db53d090d287e74098fdeb2137a0e49ae521af0979592a8c3ce528

  • SSDEEP

    12288:1hpUrEIZJqr1AkBWwNa5R0EYl795/amaX3QXaPKUmTO9A:1/jG01NHXaPVA

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 11 IoCs

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

  • Drops file in Program Files directory 3 IoCs
  • Program crash 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 5 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 51 IoCs
  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 10 IoCs
  • Suspicious use of UnmapMainImage 2 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\81323fd94b1390b66662692f8c2104024d2cf9ab761763fd8ec497b5d4c577d4.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1936
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\81323fd94b1390b66662692f8c2104024d2cf9ab761763fd8ec497b5d4c577d4.dll,#1
      2⤵
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4692
      • C:\Windows\SysWOW64\rundll32mgr.exe
        C:\Windows\SysWOW64\rundll32mgr.exe
        3⤵
        • Executes dropped EXE
        • Drops file in Program Files directory
        • System Location Discovery: System Language Discovery
        • Suspicious use of UnmapMainImage
        • Suspicious use of WriteProcessMemory
        PID:1572
        • C:\Program Files (x86)\Microsoft\WaterMark.exe
          "C:\Program Files (x86)\Microsoft\WaterMark.exe"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of UnmapMainImage
          • Suspicious use of WriteProcessMemory
          PID:2676
          • C:\Windows\SysWOW64\svchost.exe
            C:\Windows\system32\svchost.exe
            5⤵
              PID:1040
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 1040 -s 204
                6⤵
                • Program crash
                PID:4804
            • 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:3680
              • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
                "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:3680 CREDAT:17410 /prefetch:2
                6⤵
                • System Location Discovery: System Language Discovery
                • Modifies Internet Explorer settings
                • Suspicious use of SetWindowsHookEx
                PID:3232
            • 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:2056
              • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
                "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2056 CREDAT:17410 /prefetch:2
                6⤵
                • System Location Discovery: System Language Discovery
                • Modifies Internet Explorer settings
                • Suspicious use of SetWindowsHookEx
                PID:632
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4692 -s 628
          3⤵
          • Program crash
          PID:1216
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 4692 -ip 4692
      1⤵
        PID:116
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1040 -ip 1040
        1⤵
          PID:4376

        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

          ac3f25913a50aa09aeebae9f6bbaf3a8

          SHA1

          bb3e14c2752ffb0ecd49b0ec36ff7863be5de433

          SHA256

          a49353ed65cfc07f36f60316157f1435a42e143e65442abf45e28eadbb796c60

          SHA512

          e21124bcd0fa9fc5451556845830853111a3072ee4720dfdc758d0a79dcc9cee7420d6cbefb8be2568bdf048ebc799af8df44d72614ad7ac3e21470f675f0ade

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

          Filesize

          404B

          MD5

          77d208527c3a644ec8534358b8746d31

          SHA1

          ab077363e1f583dc9d4ecc67160b8e61171b5043

          SHA256

          cc9fef45093160f32c11f1f0047de8c8e9f09d884c9091689c490821df92753a

          SHA512

          393df8cdb5a0d2e1657c61d6ba69495b62766c5c16f4a5cb6a8da4c1e4ccc04ba26f1dbc1abb45f9707de77dc7a352dddebdbe6bb79eb86ccc949b86392f6711

        • C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{34A2910C-C253-11EF-B9D5-FAA11E730504}.dat

          Filesize

          3KB

          MD5

          bc895aaad2bde9407a2a17b8c99127fb

          SHA1

          539f3aa0d02ca2ce7eb0ec498b7faa6c9bfa3f69

          SHA256

          4d49434f8a61605ddd400fb2724b48070cb3644647bc68df106fc2de898ec9dc

          SHA512

          3febeee8feec5c4a31ba31ad43c27e36d0706eba377479bb6cf1fc0fe32fe11d8f803fbd7b3d7a56538af0640d3de6b6db15d6cee9274ac249017f8546074c32

        • C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{34A753BC-C253-11EF-B9D5-FAA11E730504}.dat

          Filesize

          5KB

          MD5

          45e021dfd9d2e7f2f4c689fc980000ab

          SHA1

          4c2846063eacb8cdc6f9de0de50a1389e07bd139

          SHA256

          b60fc3411f26f464169ceef692f25b29702478413cc111a4501b1b2345cb9b03

          SHA512

          2b33aeb625a677fc167cc5a528921025efd94427ccf45e5b6a479627274b12236ee028c110942a62da59a2a023d50139760da33b9c1ae3058c35382aef5cda20

        • C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\VersionManager\verD6A.tmp

          Filesize

          15KB

          MD5

          1a545d0052b581fbb2ab4c52133846bc

          SHA1

          62f3266a9b9925cd6d98658b92adec673cbe3dd3

          SHA256

          557472aeaebf4c1c800b9df14c190f66d62cbabb011300dbedde2dcddd27a6c1

          SHA512

          bd326d111589d87cd6d019378ec725ac9ac7ad4c36f22453941f7d52f90b747ede4783a83dfff6cae1b3bb46690ad49cffa77f2afda019b22863ac485b406e8d

        • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\FQRZN8O7\suggestions[1].en-US

          Filesize

          17KB

          MD5

          5a34cb996293fde2cb7a4ac89587393a

          SHA1

          3c96c993500690d1a77873cd62bc639b3a10653f

          SHA256

          c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad

          SHA512

          e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee

        • C:\Windows\SysWOW64\rundll32mgr.exe

          Filesize

          123KB

          MD5

          2cc65cb5dea68dcb6aefbce0d78a3fa3

          SHA1

          f05fd2ad722e4feb9f90fec42081b00acd5b3810

          SHA256

          a461da98eb645a7df5450ef0ac644674d32a557ce94b2529bc3fd8b896143ef3

          SHA512

          e67951b2dbad43c143e6a7f9058dccbba669913804ed8c74720a5694edd1e2a3021c98affa68b0565b2a266ec5132b531d79eeb41989bc1c418d5bb8842b7db5

        • memory/1040-33-0x0000000000E60000-0x0000000000E61000-memory.dmp

          Filesize

          4KB

        • memory/1040-34-0x0000000000E40000-0x0000000000E41000-memory.dmp

          Filesize

          4KB

        • memory/1572-14-0x0000000000400000-0x0000000000421000-memory.dmp

          Filesize

          132KB

        • memory/1572-6-0x0000000000400000-0x0000000000421000-memory.dmp

          Filesize

          132KB

        • memory/1572-12-0x00000000014C0000-0x00000000014C1000-memory.dmp

          Filesize

          4KB

        • memory/1572-10-0x0000000000400000-0x0000000000421000-memory.dmp

          Filesize

          132KB

        • memory/1572-7-0x0000000000400000-0x0000000000421000-memory.dmp

          Filesize

          132KB

        • memory/1572-8-0x0000000000400000-0x0000000000421000-memory.dmp

          Filesize

          132KB

        • memory/1572-16-0x0000000000400000-0x0000000000421000-memory.dmp

          Filesize

          132KB

        • memory/1572-13-0x0000000000400000-0x0000000000421000-memory.dmp

          Filesize

          132KB

        • memory/1572-4-0x0000000000400000-0x0000000000441000-memory.dmp

          Filesize

          260KB

        • memory/2676-25-0x0000000000400000-0x0000000000441000-memory.dmp

          Filesize

          260KB

        • memory/2676-38-0x0000000000400000-0x0000000000421000-memory.dmp

          Filesize

          132KB

        • memory/2676-37-0x0000000077382000-0x0000000077383000-memory.dmp

          Filesize

          4KB

        • memory/2676-36-0x0000000000070000-0x0000000000071000-memory.dmp

          Filesize

          4KB

        • memory/2676-41-0x0000000000400000-0x0000000000421000-memory.dmp

          Filesize

          132KB

        • memory/2676-31-0x0000000077382000-0x0000000077383000-memory.dmp

          Filesize

          4KB

        • memory/2676-30-0x0000000000060000-0x0000000000061000-memory.dmp

          Filesize

          4KB

        • memory/2676-29-0x0000000000400000-0x0000000000421000-memory.dmp

          Filesize

          132KB

        • memory/4692-35-0x0000000010000000-0x0000000010093000-memory.dmp

          Filesize

          588KB

        • memory/4692-0-0x0000000010000000-0x0000000010093000-memory.dmp

          Filesize

          588KB