Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/05/2024, 04:15

General

  • Target

    33c2e83deecb9631716c249016ba7a460398af74260648a5b434ec0ea2cb793c.exe

  • Size

    406KB

  • MD5

    6261b4321aed3ecd2f700ed37c64843c

  • SHA1

    7eeeb49a06410ef6df0e361d3dc5a43ee10492ad

  • SHA256

    33c2e83deecb9631716c249016ba7a460398af74260648a5b434ec0ea2cb793c

  • SHA512

    7971ae6bcb18466564be65196691aa62f8bc7fbd071e954749640bc29d4d127383291d9ce1f130865d8bb978e88a1ed130c57416364a7c8de774db2eeb0298d3

  • SSDEEP

    6144:3w9D91dOrcN3ZGXNYFNmIkYvUIelVjjVtGRyFH4:gtRfJcNYFNm8UhlZGse

Malware Config

Signatures

  • Blocklisted process makes network request 8 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 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.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Drops file in Program Files directory 2 IoCs
  • 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 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\33c2e83deecb9631716c249016ba7a460398af74260648a5b434ec0ea2cb793c.exe
    "C:\Users\Admin\AppData\Local\Temp\33c2e83deecb9631716c249016ba7a460398af74260648a5b434ec0ea2cb793c.exe"
    1⤵
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1380
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\pkmwl.exe "C:\Users\Admin\AppData\Local\Temp\33c2e83deecb9631716c249016ba7a460398af74260648a5b434ec0ea2cb793c.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3608
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 2
        3⤵
        • Runs ping.exe
        PID:4072
      • C:\Users\Admin\AppData\Local\Temp\pkmwl.exe
        C:\Users\Admin\AppData\Local\Temp\\pkmwl.exe "C:\Users\Admin\AppData\Local\Temp\33c2e83deecb9631716c249016ba7a460398af74260648a5b434ec0ea2cb793c.exe"
        3⤵
        • Deletes itself
        • Executes dropped EXE
        • Drops file in Program Files directory
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1580
        • \??\c:\windows\SysWOW64\rundll32.exe
          c:\windows\system32\rundll32.exe "c:\Program Files\sukhfwhyg\cntfown.dll",Verify C:\Users\Admin\AppData\Local\Temp\pkmwl.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)
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          • Checks processor information in registry
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:628

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\pkmwl.exe

          Filesize

          406KB

          MD5

          a5f043831778fff9a638e37b91824e44

          SHA1

          dfb026a58e4ac634b8de85081bbf1405c5e3c807

          SHA256

          ac16e8d1eaa5a1ba31e97138afcfdaee15322c864c1f3cf6a3d618000d4b84e7

          SHA512

          30af14630e1646baf7255b56f95ea0efe8b281adb8b3676bb59fc2b3e25d965843f6d7d80e4c42ee82382b5c39fc6d7643a091578629c6dce69c67a943957a1a

        • \??\c:\Program Files\sukhfwhyg\cntfown.dll

          Filesize

          228KB

          MD5

          a61490acdaa060686ae2833e59b5c967

          SHA1

          707d66059e03dfde4dd09f5253be5ad9aecf9fc4

          SHA256

          7d438461f5e4b724c63d344bf176a4024ae674fab0d1a0d2a79f222193184e8c

          SHA512

          2e27130dab6cdfa9bf962e64a67769cd024e805f7bd2d1ef9e0f0661e1a0664f7cff58ca3d9d431c77b52a5217419c0d0fcb23773f1218c2e4016425bcc87f29

        • memory/628-10-0x0000000010000000-0x0000000010080000-memory.dmp

          Filesize

          512KB

        • memory/628-11-0x0000000010000000-0x0000000010080000-memory.dmp

          Filesize

          512KB

        • memory/628-13-0x0000000010000000-0x0000000010080000-memory.dmp

          Filesize

          512KB

        • memory/1380-0-0x0000000000400000-0x0000000000464000-memory.dmp

          Filesize

          400KB

        • memory/1380-2-0x0000000000400000-0x0000000000464000-memory.dmp

          Filesize

          400KB

        • memory/1580-7-0x0000000000400000-0x0000000000464000-memory.dmp

          Filesize

          400KB