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Analysis

  • max time kernel
    119s
  • max time network
    117s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    30/09/2024, 19:15

General

  • Target

    a797b8d85a1a3654cf2578b3025e2d265fd9c45ecfea95d7b9c2a08eaa0d9a43N.exe

  • Size

    20KB

  • MD5

    8fce0865c8cce17a58b7afe940d30380

  • SHA1

    56e081a51ae2690f2280eabcf6a4b1008261203c

  • SHA256

    a797b8d85a1a3654cf2578b3025e2d265fd9c45ecfea95d7b9c2a08eaa0d9a43

  • SHA512

    3f7834ae93dd9e7b68c1b1a9e2e5e02a07169f54072b441200da42d52518413349a1169a00d5a06ffaf460b5f0081cc88ce6eb421d2e9550a034e85230f52c7f

  • SSDEEP

    384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvXziCybr:rRkiLw3HsDSARGG/jfer

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
  • Loads dropped DLL 3 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 6 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 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs

Processes

  • C:\Windows\system32\winlogon.exe
    winlogon.exe
    1⤵
      PID:428
    • C:\Windows\Explorer.EXE
      C:\Windows\Explorer.EXE
      1⤵
        PID:1224
        • C:\Users\Admin\AppData\Local\Temp\a797b8d85a1a3654cf2578b3025e2d265fd9c45ecfea95d7b9c2a08eaa0d9a43N.exe
          "C:\Users\Admin\AppData\Local\Temp\a797b8d85a1a3654cf2578b3025e2d265fd9c45ecfea95d7b9c2a08eaa0d9a43N.exe"
          2⤵
          • Loads dropped DLL
          • Drops file in System32 directory
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:812
          • 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
            • Loads dropped DLL
            • 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:2084
            • C:\Windows\SysWOW64\rmass.exe
              --k33p
              4⤵
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              PID:1108

      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

        22KB

        MD5

        97f45b32a185c3fb7cc06188c8f84864

        SHA1

        48152a83603dca0e878f491455b9d8041d43a214

        SHA256

        18f0178b21a59bd504f1d0eccb6213307e2a01ce4908903bd506251c2cb0b9ed

        SHA512

        acfbbe38518c69afefb9d2f1ecf6a0d04a836134bd8589f6bd500851ab2a1a0f83488b9d23598a38dbceb9651a76ecceb86cae52636839ccce30bea8e066df92

      • C:\Windows\SysWOW64\ntdbg.exe

        Filesize

        23KB

        MD5

        04944af5b2aacb5bd32424cdde4b8a48

        SHA1

        dc20058d31651b435f9b0c00d911de1b61e2340d

        SHA256

        e24d0a63ba9309cd5411bf909a20320a2b9568b9b2901c7d095962c0e5f9897d

        SHA512

        861e99968de4fc8675d99deb9b106c36c207cf0615b4a40d7ace4937b10d08c4c21af2b0acead266742f3e270bb2ee3c1cc2cd4ccf836ba6028c44152ec5483e

      • C:\Windows\SysWOW64\rmass.exe

        Filesize

        20KB

        MD5

        8fce0865c8cce17a58b7afe940d30380

        SHA1

        56e081a51ae2690f2280eabcf6a4b1008261203c

        SHA256

        a797b8d85a1a3654cf2578b3025e2d265fd9c45ecfea95d7b9c2a08eaa0d9a43

        SHA512

        3f7834ae93dd9e7b68c1b1a9e2e5e02a07169f54072b441200da42d52518413349a1169a00d5a06ffaf460b5f0081cc88ce6eb421d2e9550a034e85230f52c7f

      • memory/812-0-0x0000000000400000-0x0000000000411000-memory.dmp

        Filesize

        68KB

      • memory/812-11-0x0000000000400000-0x0000000000411000-memory.dmp

        Filesize

        68KB

      • memory/1108-26-0x0000000000400000-0x0000000000411000-memory.dmp

        Filesize

        68KB

      • memory/2084-25-0x00000000003A0000-0x00000000003B1000-memory.dmp

        Filesize

        68KB

      • memory/2084-13-0x0000000000400000-0x0000000000411000-memory.dmp

        Filesize

        68KB

      • memory/2084-48-0x0000000000400000-0x0000000000411000-memory.dmp

        Filesize

        68KB