Analysis

  • max time kernel
    119s
  • max time network
    108s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/11/2024, 04:59

General

  • Target

    52477199561794e3f8e5871c0226cc4d267f039ff66535554d4be1e19796fdd6N.exe

  • Size

    64KB

  • MD5

    58cc7772895672f3c1ad1eb2b089f080

  • SHA1

    3411881e2c0c92d496a310736aa4c7f6892fcefc

  • SHA256

    52477199561794e3f8e5871c0226cc4d267f039ff66535554d4be1e19796fdd6

  • SHA512

    508320d35dec15ef7fa906a178d81e74d650e0464dc099d0806030a0d9f6c2e17fac24f32d23b579e6b8effde1edf82842c1ec6b311b8115a217caaa1ff24abc

  • SSDEEP

    768:rAUJmQCcmLCXQq6fsKiJYsIkjJVzqsVG5kuGKQLddOW/p4WvEITH3i:sUNHFKQbIkHvGMdOq4b

Malware Config

Signatures

  • Windows security bypass 2 TTPs 4 IoCs
  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 4 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

  • Drops file in Drivers directory 1 IoCs
  • Event Triggered Execution: Image File Execution Options Injection 1 TTPs 3 IoCs
  • Executes dropped EXE 2 IoCs
  • Windows security modification 2 TTPs 4 IoCs
  • Indicator Removal: Clear Persistence 1 TTPs 1 IoCs

    remove IFEO.

  • Modifies WinLogon 2 TTPs 5 IoCs
  • Drops file in System32 directory 12 IoCs
  • UPX packed file 5 IoCs

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

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

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

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Windows\system32\winlogon.exe
    winlogon.exe
    1⤵
      PID:612
    • C:\Windows\Explorer.EXE
      C:\Windows\Explorer.EXE
      1⤵
        PID:3472
        • C:\Users\Admin\AppData\Local\Temp\52477199561794e3f8e5871c0226cc4d267f039ff66535554d4be1e19796fdd6N.exe
          "C:\Users\Admin\AppData\Local\Temp\52477199561794e3f8e5871c0226cc4d267f039ff66535554d4be1e19796fdd6N.exe"
          2⤵
          • Drops file in System32 directory
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:4020
          • C:\Windows\SysWOW64\rmass.exe
            "C:\Windows\system32\rmass.exe"
            3⤵
            • Windows security bypass
            • Boot or Logon Autostart Execution: Active Setup
            • Drops file in Drivers directory
            • Event Triggered Execution: Image File Execution Options Injection
            • Executes dropped EXE
            • Windows security modification
            • Indicator Removal: Clear Persistence
            • Modifies WinLogon
            • Drops file in System32 directory
            • Drops file in Program Files directory
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:1512
            • C:\Windows\SysWOW64\rmass.exe
              --k33p
              4⤵
              • Executes dropped EXE
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: EnumeratesProcesses
              PID:3124

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            • C:\Windows\SysWOW64\RECOVER32.DLL

              Filesize

              5KB

              MD5

              2b2c28a7a01f9584fe220ef84003427f

              SHA1

              5fc023df0b5064045eb8de7f2dbe26f07f6fec70

              SHA256

              9e00af53b1d0c0f5270d94a666d95aa7b4dcb9fea49487c210c055c9dcfcc9eb

              SHA512

              39192a8a91dec1abff25af8dac0cf39da4dfd51b3fb4f1ef0b4e776185d4280fbe8387c2ea778da7bbf2ce288b0bce4d23cbe8d9e87bbd250159044f5adbac78

            • C:\Windows\SysWOW64\ahuy.exe

              Filesize

              66KB

              MD5

              002dab514849e6de112fd052244f9866

              SHA1

              ac578ab18b88f8b1fa8f8a7226aeb82500d71449

              SHA256

              29c78f2275910d9c72ec462e2ddab5e6275698a7a51acd3968f25f17569ba10d

              SHA512

              c6afff556f391bc522d1dc47191f68771ae4d7fdf3d03382325aaf282103afb34ea7c9cf501b7e4c0e29cdbd97b1fdae84c43875e6ad4998d914e14c7e75f56e

            • C:\Windows\SysWOW64\ntdbg.exe

              Filesize

              67KB

              MD5

              733c0a5fd4258233bb181bace0dcc844

              SHA1

              f69467e0d235d0d7da9cf565fc7dc308fd9bec5c

              SHA256

              4eb646409a601fcf310a6758bf3eb20b723e4bdcb585b3d1e0357d91db893f04

              SHA512

              19b0da38893bad29dbc60facb6fcf98554f2a1b6be6dbf524327b06443ddb44bba1953a17b0ece84136db96bc68b50f2d9044ce5946f191b56cdca7993634347

            • C:\Windows\SysWOW64\rmass.exe

              Filesize

              64KB

              MD5

              58cc7772895672f3c1ad1eb2b089f080

              SHA1

              3411881e2c0c92d496a310736aa4c7f6892fcefc

              SHA256

              52477199561794e3f8e5871c0226cc4d267f039ff66535554d4be1e19796fdd6

              SHA512

              508320d35dec15ef7fa906a178d81e74d650e0464dc099d0806030a0d9f6c2e17fac24f32d23b579e6b8effde1edf82842c1ec6b311b8115a217caaa1ff24abc

            • memory/1512-41-0x0000000000400000-0x0000000000412000-memory.dmp

              Filesize

              72KB

            • memory/3124-45-0x0000000000400000-0x0000000000412000-memory.dmp

              Filesize

              72KB

            • memory/4020-0-0x0000000000400000-0x0000000000412000-memory.dmp

              Filesize

              72KB

            • memory/4020-7-0x0000000000400000-0x0000000000412000-memory.dmp

              Filesize

              72KB