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Analysis

  • max time kernel
    119s
  • max time network
    94s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-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
  • 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 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:608
    • C:\Windows\Explorer.EXE
      C:\Windows\Explorer.EXE
      1⤵
        PID:3380
        • C:\Users\Admin\AppData\Local\Temp\a797b8d85a1a3654cf2578b3025e2d265fd9c45ecfea95d7b9c2a08eaa0d9a43N.exe
          "C:\Users\Admin\AppData\Local\Temp\a797b8d85a1a3654cf2578b3025e2d265fd9c45ecfea95d7b9c2a08eaa0d9a43N.exe"
          2⤵
          • Drops file in System32 directory
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:3352
          • 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:3992
            • C:\Windows\SysWOW64\rmass.exe
              --k33p
              4⤵
              • Executes dropped EXE
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: EnumeratesProcesses
              PID:3288

      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

        c4b60212f9f1bc1b63b7f9e7cf51d5ea

        SHA1

        663416dfe685acb7269af6f2207b719b28e7c50f

        SHA256

        d51d407cace6a95dc81c1985ffed4b6040332bdb764a51071a40eafc5c91ded4

        SHA512

        d147c04f7ecb1567d0d5e88215a304d654f34db40443ad8da8495e18fe23e61feefe627266bacf4d9e2ab0d47a4a15aceb05ffae273f7edaf1e02332ca83b335

      • C:\Windows\SysWOW64\ntdbg.exe

        Filesize

        23KB

        MD5

        154df2788255430979347fea4ced6a29

        SHA1

        d3b3917246eb4838f7d611f64c7c18dc0146daeb

        SHA256

        188b1444cc253ab668d8970b2afacfb2b66a7a7968857821542f2d07bbbc1920

        SHA512

        bcc10766f8b1d143c45406a826aa404e2f44a0d64c94fe7459c95722f35548ff23b612891361055e7553355c12449a8fe86283f073ab6056ea3fda1c7ceaea42

      • C:\Windows\SysWOW64\rmass.exe

        Filesize

        20KB

        MD5

        8fce0865c8cce17a58b7afe940d30380

        SHA1

        56e081a51ae2690f2280eabcf6a4b1008261203c

        SHA256

        a797b8d85a1a3654cf2578b3025e2d265fd9c45ecfea95d7b9c2a08eaa0d9a43

        SHA512

        3f7834ae93dd9e7b68c1b1a9e2e5e02a07169f54072b441200da42d52518413349a1169a00d5a06ffaf460b5f0081cc88ce6eb421d2e9550a034e85230f52c7f

      • memory/3288-18-0x0000000000400000-0x0000000000411000-memory.dmp

        Filesize

        68KB

      • memory/3288-48-0x0000000000400000-0x0000000000411000-memory.dmp

        Filesize

        68KB

      • memory/3352-0-0x0000000000400000-0x0000000000411000-memory.dmp

        Filesize

        68KB

      • memory/3352-7-0x0000000000400000-0x0000000000411000-memory.dmp

        Filesize

        68KB

      • memory/3992-43-0x0000000000400000-0x0000000000411000-memory.dmp

        Filesize

        68KB