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Analysis

  • max time kernel
    149s
  • max time network
    144s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    05/10/2023, 18:49

General

  • Target

    811581243c03c2d6a98d0b24bfec9e31_JC.exe

  • Size

    19KB

  • MD5

    811581243c03c2d6a98d0b24bfec9e31

  • SHA1

    77cf93cd3f857f59c22c6d6f13770e33672f7777

  • SHA256

    5457179ec6ed6bce1c5c11ed274409b2802fa3d7b220569301d47bee3971b405

  • SHA512

    93b70881b103fa8af9edb24054b4e6b658443202fb74ee162d8fb239c08a3eeaf1d973f49d03569ac21dcc9cbd426d5a4b379c556d8d84337799f828a3608b4f

  • SSDEEP

    384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvXfy:rRkiLw3HsDSARGG/q

Malware Config

Signatures

  • Windows security bypass 2 TTPs 4 IoCs
  • Drops file in Drivers directory 1 IoCs
  • Modifies Installed Components in the registry 2 TTPs 4 IoCs
  • Sets file execution options in registry 2 TTPs 3 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 3 IoCs
  • UPX packed file 12 IoCs

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

  • Windows security modification 2 TTPs 4 IoCs
  • Modifies WinLogon 2 TTPs 5 IoCs
  • Drops file in System32 directory 12 IoCs
  • Drops file in Program Files directory 3 IoCs
  • 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:420
    • C:\Windows\Explorer.EXE
      C:\Windows\Explorer.EXE
      1⤵
        PID:1216
        • C:\Users\Admin\AppData\Local\Temp\811581243c03c2d6a98d0b24bfec9e31_JC.exe
          "C:\Users\Admin\AppData\Local\Temp\811581243c03c2d6a98d0b24bfec9e31_JC.exe"
          2⤵
          • Loads dropped DLL
          • Drops file in System32 directory
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2252
          • C:\Windows\SysWOW64\rmass.exe
            "C:\Windows\system32\rmass.exe"
            3⤵
            • Windows security bypass
            • Drops file in Drivers directory
            • Modifies Installed Components in the registry
            • Sets file execution options in registry
            • Executes dropped EXE
            • Loads dropped DLL
            • Windows security modification
            • Modifies WinLogon
            • Drops file in System32 directory
            • Drops file in Program Files directory
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:2912
            • C:\Windows\SysWOW64\rmass.exe
              --k33p
              4⤵
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              PID:2780

      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

        21KB

        MD5

        0716bd9f3e1d9549693aad7d8251f1b0

        SHA1

        266d346ab79af8b3d87004431dc78d72869b38d9

        SHA256

        ce40d8757566e0295e2a660c7b8afb054743b3419c9f0bd3e848e63f95ef866b

        SHA512

        42677c9162b2ad5b52ea98f9e39f725d1c7192996b6f67eaf727481fa40b749d0c7ae80529ead9b14f53fb15d832a91e33a81b826a60f3d4c856ce915cc7af65

      • C:\Windows\SysWOW64\ntdbg.exe

        Filesize

        22KB

        MD5

        034f41df90c521525d69cd82e2bc6ce5

        SHA1

        4201c4274f9b73a9d84d2130f6a0ab2f075cb9f8

        SHA256

        825055de35a124c366b8b9c6d1b26ce17f9cd3c0b57c9edd5f29dbd903359ae0

        SHA512

        f56a26ca02cc067850068765426cac91d48aa359a57657da4a2a67c56b6acf639d6fa9d34889acc03d930661c9a87a821f8b58ac150d1b529d50d3f2c4c527cc

      • C:\Windows\SysWOW64\rmass.exe

        Filesize

        19KB

        MD5

        811581243c03c2d6a98d0b24bfec9e31

        SHA1

        77cf93cd3f857f59c22c6d6f13770e33672f7777

        SHA256

        5457179ec6ed6bce1c5c11ed274409b2802fa3d7b220569301d47bee3971b405

        SHA512

        93b70881b103fa8af9edb24054b4e6b658443202fb74ee162d8fb239c08a3eeaf1d973f49d03569ac21dcc9cbd426d5a4b379c556d8d84337799f828a3608b4f

      • C:\Windows\SysWOW64\rmass.exe

        Filesize

        19KB

        MD5

        811581243c03c2d6a98d0b24bfec9e31

        SHA1

        77cf93cd3f857f59c22c6d6f13770e33672f7777

        SHA256

        5457179ec6ed6bce1c5c11ed274409b2802fa3d7b220569301d47bee3971b405

        SHA512

        93b70881b103fa8af9edb24054b4e6b658443202fb74ee162d8fb239c08a3eeaf1d973f49d03569ac21dcc9cbd426d5a4b379c556d8d84337799f828a3608b4f

      • C:\Windows\SysWOW64\rmass.exe

        Filesize

        19KB

        MD5

        811581243c03c2d6a98d0b24bfec9e31

        SHA1

        77cf93cd3f857f59c22c6d6f13770e33672f7777

        SHA256

        5457179ec6ed6bce1c5c11ed274409b2802fa3d7b220569301d47bee3971b405

        SHA512

        93b70881b103fa8af9edb24054b4e6b658443202fb74ee162d8fb239c08a3eeaf1d973f49d03569ac21dcc9cbd426d5a4b379c556d8d84337799f828a3608b4f

      • C:\Windows\SysWOW64\rmass.exe

        Filesize

        19KB

        MD5

        811581243c03c2d6a98d0b24bfec9e31

        SHA1

        77cf93cd3f857f59c22c6d6f13770e33672f7777

        SHA256

        5457179ec6ed6bce1c5c11ed274409b2802fa3d7b220569301d47bee3971b405

        SHA512

        93b70881b103fa8af9edb24054b4e6b658443202fb74ee162d8fb239c08a3eeaf1d973f49d03569ac21dcc9cbd426d5a4b379c556d8d84337799f828a3608b4f

      • C:\Windows\System32\drivers\etc\hosts

        Filesize

        1KB

        MD5

        b10b13206b0f2cf3968050072f6979bf

        SHA1

        699db21ba9cecf3f13ac3d76e22cfa41aa94da80

        SHA256

        0eef3217095cb97b695c434e74d6314bf9e869a013d6e9c88e58c34576a276b4

        SHA512

        d33bfd931be6676539507a69101d99fa4c5ef36b12422bd11f063b9b6a47b7444f6c4ad5f35e044714fdb872e96cd9fddf049e8329af1219483887f6ac5f4a5d

      • \Windows\SysWOW64\rmass.exe

        Filesize

        19KB

        MD5

        811581243c03c2d6a98d0b24bfec9e31

        SHA1

        77cf93cd3f857f59c22c6d6f13770e33672f7777

        SHA256

        5457179ec6ed6bce1c5c11ed274409b2802fa3d7b220569301d47bee3971b405

        SHA512

        93b70881b103fa8af9edb24054b4e6b658443202fb74ee162d8fb239c08a3eeaf1d973f49d03569ac21dcc9cbd426d5a4b379c556d8d84337799f828a3608b4f

      • \Windows\SysWOW64\rmass.exe

        Filesize

        19KB

        MD5

        811581243c03c2d6a98d0b24bfec9e31

        SHA1

        77cf93cd3f857f59c22c6d6f13770e33672f7777

        SHA256

        5457179ec6ed6bce1c5c11ed274409b2802fa3d7b220569301d47bee3971b405

        SHA512

        93b70881b103fa8af9edb24054b4e6b658443202fb74ee162d8fb239c08a3eeaf1d973f49d03569ac21dcc9cbd426d5a4b379c556d8d84337799f828a3608b4f

      • \Windows\SysWOW64\rmass.exe

        Filesize

        19KB

        MD5

        811581243c03c2d6a98d0b24bfec9e31

        SHA1

        77cf93cd3f857f59c22c6d6f13770e33672f7777

        SHA256

        5457179ec6ed6bce1c5c11ed274409b2802fa3d7b220569301d47bee3971b405

        SHA512

        93b70881b103fa8af9edb24054b4e6b658443202fb74ee162d8fb239c08a3eeaf1d973f49d03569ac21dcc9cbd426d5a4b379c556d8d84337799f828a3608b4f

      • memory/2252-10-0x0000000000400000-0x0000000000411000-memory.dmp

        Filesize

        68KB

      • memory/2252-11-0x00000000003C0000-0x00000000003D1000-memory.dmp

        Filesize

        68KB

      • memory/2252-0-0x0000000000400000-0x0000000000411000-memory.dmp

        Filesize

        68KB

      • memory/2252-50-0x00000000003C0000-0x00000000003D1000-memory.dmp

        Filesize

        68KB

      • memory/2780-24-0x0000000000400000-0x0000000000411000-memory.dmp

        Filesize

        68KB

      • memory/2912-25-0x0000000000400000-0x0000000000411000-memory.dmp

        Filesize

        68KB

      • memory/2912-57-0x0000000000400000-0x0000000000411000-memory.dmp

        Filesize

        68KB

      • memory/2912-59-0x00000000003A0000-0x00000000003B1000-memory.dmp

        Filesize

        68KB