Analysis

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

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    17/10/2024, 01:01

General

  • Target

    b4fb4635779ffd005dc23d9a661d459fec77b378acf66a03e52262ae0095e42dN.exe

  • Size

    83KB

  • MD5

    60eafa19c7383f0fd224e93cafd94c70

  • SHA1

    cb1aa5f0b22273fb5912b9d6df076ed5e5ef631b

  • SHA256

    b4fb4635779ffd005dc23d9a661d459fec77b378acf66a03e52262ae0095e42d

  • SHA512

    058b00a1dfd6fbd9eca141eeb49c1f502ae599ca524f68fdd6c321309df7f2e0372d7f55e3cfb2122220226bdbba64460c2b0fc496df1cb0a3147c1a6588058d

  • SSDEEP

    768:qGHV45EDE477AZbUJx0rZGE3jCELoiMMj6hZ3nE+EXVmkDbjRL8Khc15Z6J1SkQ3:qG14P477AxUYrZGoC09k0SkTRHhWqPRU

Malware Config

Signatures

  • Blocklisted process makes network request 4 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 4 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

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

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 19 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b4fb4635779ffd005dc23d9a661d459fec77b378acf66a03e52262ae0095e42dN.exe
    "C:\Users\Admin\AppData\Local\Temp\b4fb4635779ffd005dc23d9a661d459fec77b378acf66a03e52262ae0095e42dN.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2164
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c ping 127.0.0.1 -n 2&c:\snxkb.exe "C:\Users\Admin\AppData\Local\Temp\b4fb4635779ffd005dc23d9a661d459fec77b378acf66a03e52262ae0095e42dN.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • System Network Configuration Discovery: Internet Connection Discovery
      • Suspicious use of WriteProcessMemory
      PID:2848
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 2
        3⤵
        • System Location Discovery: System Language Discovery
        • System Network Configuration Discovery: Internet Connection Discovery
        • Runs ping.exe
        PID:2808
      • \??\c:\snxkb.exe
        c:\snxkb.exe "C:\Users\Admin\AppData\Local\Temp\b4fb4635779ffd005dc23d9a661d459fec77b378acf66a03e52262ae0095e42dN.exe"
        3⤵
        • Deletes itself
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:592
        • \??\c:\windows\SysWOW64\rundll32.exe
          c:\windows\system32\rundll32.exe "c:\rwxvf\psbbvchfh.dll",init c:\snxkb.exe
          4⤵
          • Blocklisted process makes network request
          • Loads dropped DLL
          • Adds Run key to start application
          • Enumerates connected drives
          • Writes to the Master Boot Record (MBR)
          • System Location Discovery: System Language Discovery
          • Checks processor information in registry
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2852

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\snxkb.exe

          Filesize

          84KB

          MD5

          584485a06eec456bfbde4fbbc41e491f

          SHA1

          14dbf5aeddd39a1cccb15266d54e8b449450dad4

          SHA256

          7909d97da9a4c61f6c2d386bf8c2bd4ca44762fb32de970c6c0d3dff8d7ead2f

          SHA512

          7c5780fa1eb2ef81401bcd8d0d1d194f7eea75379882ea26ebb01782a57bdffedabee85d15b7edf2777c01fa8cef76b8c9538e33b83da4787304b0cbeb4fa4d8

        • \??\c:\rwxvf\psbbvchfh.dll

          Filesize

          42KB

          MD5

          36e3fb5964d663272cf1169e1e1ca478

          SHA1

          58115e08b49505bcbbb5c88a28a86222ba18d5d4

          SHA256

          c7c41689de030df0f78f471422fa2a6383b36e77c94e7f6f124a96feb3e27ed7

          SHA512

          daff53b11aa400437a06287707a334a09661c1ef7d0fd8beaf1a874c79c16fe45bd1188343d0623e839d3ead5ea2dd90896e37ccf3b252c7220c74989a9ba442

        • memory/592-7-0x0000000000270000-0x0000000000271000-memory.dmp

          Filesize

          4KB

        • memory/592-9-0x0000000000400000-0x0000000000425000-memory.dmp

          Filesize

          148KB

        • memory/2164-0-0x0000000000400000-0x0000000000425000-memory.dmp

          Filesize

          148KB

        • memory/2164-1-0x0000000000270000-0x0000000000271000-memory.dmp

          Filesize

          4KB

        • memory/2164-3-0x0000000000400000-0x0000000000425000-memory.dmp

          Filesize

          148KB

        • memory/2848-6-0x00000000000F0000-0x0000000000115000-memory.dmp

          Filesize

          148KB

        • memory/2852-17-0x0000000010000000-0x000000001002E000-memory.dmp

          Filesize

          184KB

        • memory/2852-16-0x0000000010000000-0x000000001002E000-memory.dmp

          Filesize

          184KB

        • memory/2852-15-0x0000000010000000-0x000000001002E000-memory.dmp

          Filesize

          184KB

        • memory/2852-19-0x0000000010000000-0x000000001002E000-memory.dmp

          Filesize

          184KB

        • memory/2852-18-0x0000000010021000-0x0000000010022000-memory.dmp

          Filesize

          4KB

        • memory/2852-20-0x0000000010000000-0x000000001002E000-memory.dmp

          Filesize

          184KB

        • memory/2852-21-0x0000000010000000-0x000000001002E000-memory.dmp

          Filesize

          184KB

        • memory/2852-22-0x0000000010000000-0x000000001002E000-memory.dmp

          Filesize

          184KB

        • memory/2852-23-0x0000000010021000-0x0000000010022000-memory.dmp

          Filesize

          4KB

        • memory/2852-24-0x0000000010000000-0x000000001002E000-memory.dmp

          Filesize

          184KB