Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/03/2024, 23:32

General

  • Target

    94993854183634c5ace0444f97af99378c5d27f12035a18e773c97fde806a91b.dll

  • Size

    761KB

  • MD5

    b2f80fd20c35e479154fa781c9ae5a19

  • SHA1

    dcec90a124a43ac7af6b9a8a290f0f95720aa5b0

  • SHA256

    94993854183634c5ace0444f97af99378c5d27f12035a18e773c97fde806a91b

  • SHA512

    994a73274973391c7450f36dd1f2d84388a0033149f29676c9d93416b0a4a8fbf05a9183a3bf9db903de8658c2fc53fe072c7625e4c20ac586da4c5c132faa22

  • SSDEEP

    12288:o7ODNZNF+IqOIl8hLu6Mi202K+EY0zNLSJOljn01C:/ZNF+dXlt6Mi202KdzxACn00

Malware Config

Signatures

  • Ramnit

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

  • UPX dump on OEP (original entry point) 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • UPX packed file 1 IoCs

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

  • Drops file in System32 directory 1 IoCs
  • Program crash 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\94993854183634c5ace0444f97af99378c5d27f12035a18e773c97fde806a91b.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2024
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\94993854183634c5ace0444f97af99378c5d27f12035a18e773c97fde806a91b.dll,#1
      2⤵
      • Drops file in System32 directory
      • Suspicious use of WriteProcessMemory
      PID:3708
      • C:\Windows\SysWOW64\rundll32mgr.exe
        C:\Windows\SysWOW64\rundll32mgr.exe
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        PID:2760
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2760 -s 480
          4⤵
          • Program crash
          PID:2804
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2760 -ip 2760
    1⤵
      PID:4304

    Network

          MITRE ATT&CK Matrix

          Replay Monitor

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          Downloads

          • C:\Users\Admin\AppData\Local\Temp\~TM448B.tmp

            Filesize

            1.6MB

            MD5

            4f3387277ccbd6d1f21ac5c07fe4ca68

            SHA1

            e16506f662dc92023bf82def1d621497c8ab5890

            SHA256

            767a3fc4a7a6818cdc3f0b99aaa95db694f6bcde719d2057a88b3d4df3d74fac

            SHA512

            9da199ac69e3c0d4e0c6307e0ab8178f12cc25cb2f14c3511f6b64e6e60a925c860f3263cb38353a97b55a71ef4d27f8cb7fa3cfc08e7c1a349fd8d209dfa219

          • C:\Windows\SysWOW64\rundll32mgr.exe

            Filesize

            157KB

            MD5

            2ad7467eeceedd64b8bd4f6e04c3cd49

            SHA1

            d6c5d9878dc49ae9b531d61283609e207154a921

            SHA256

            2aab17b2f18dfb70cd737b27b1a438ad8878889070a6e025b3684483054f60c9

            SHA512

            7a647d4a8de90d11cd5afb82ace8354869af0893f28afcf9491d1d4de421315d9a394a5d3462d88c0eff6c5a7a4ed41897d8d0498b59b4b7428ddbb61786be2a

          • memory/2760-9-0x00000000775B2000-0x00000000775B4000-memory.dmp

            Filesize

            8KB

          • memory/2760-5-0x0000000000400000-0x0000000000432000-memory.dmp

            Filesize

            200KB

          • memory/2760-11-0x00000000775B2000-0x00000000775B4000-memory.dmp

            Filesize

            8KB

          • memory/2760-10-0x00000000775B2000-0x00000000775B3000-memory.dmp

            Filesize

            4KB

          • memory/2760-12-0x0000000000400000-0x0000000000432000-memory.dmp

            Filesize

            200KB

          • memory/2760-13-0x00000000006B0000-0x00000000006E2000-memory.dmp

            Filesize

            200KB

          • memory/3708-1-0x0000000010000000-0x00000000100C3000-memory.dmp

            Filesize

            780KB