Analysis

  • max time kernel
    117s
  • max time network
    118s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    06/10/2024, 04:16

General

  • Target

    08dc6c6bc916f05577694a26c660b9a500e6d72c8c9a863f52440d17b798c2caN.exe

  • Size

    672KB

  • MD5

    0cb651bf414b2fc0cef464870ab1e850

  • SHA1

    fc86f69e2554f69b387ceb629decc998720dae85

  • SHA256

    08dc6c6bc916f05577694a26c660b9a500e6d72c8c9a863f52440d17b798c2ca

  • SHA512

    e49d2fc3fe3fe297e18cfea5f66376f0ee116b6fadbf8fa1ecc58248877cbdf2047d636d55940a5bbcb691032aa508bad7e42054d00a4c251dc86f753b5db00c

  • SSDEEP

    12288:cO3CUmFTPWO2YP1SifXtUsn1Fv2RaDlVkvb:73rmAlYNXvtUsORaDIv

Malware Config

Signatures

  • ISR Stealer

    ISR Stealer is a modified version of Hackhound Stealer written in visual basic.

  • ISR Stealer payload 1 IoCs
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Adds policy Run key to start application 2 TTPs 4 IoCs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Executes dropped EXE 7 IoCs
  • Loads dropped DLL 8 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • 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 2 IoCs
  • Writes to the Master Boot Record (MBR) 1 TTPs 3 IoCs

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

  • Suspicious use of SetThreadContext 5 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • System Location Discovery: System Language Discovery 1 TTPs 10 IoCs

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

  • System Time Discovery 1 TTPs 1 IoCs

    Adversary may gather the system time and/or time zone settings from a local or remote system.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of SetWindowsHookEx 9 IoCs
  • Suspicious use of WriteProcessMemory 59 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\08dc6c6bc916f05577694a26c660b9a500e6d72c8c9a863f52440d17b798c2caN.exe
    "C:\Users\Admin\AppData\Local\Temp\08dc6c6bc916f05577694a26c660b9a500e6d72c8c9a863f52440d17b798c2caN.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2720
    • C:\Users\Admin\AppData\Local\Temp\08dc6c6bc916f05577694a26c660b9a500e6d72c8c9a863f52440d17b798c2caN.exe
      "C:\Users\Admin\AppData\Local\Temp\08dc6c6bc916f05577694a26c660b9a500e6d72c8c9a863f52440d17b798c2caN.exe"
      2⤵
      • Loads dropped DLL
      • Writes to the Master Boot Record (MBR)
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2844
      • C:\Users\Admin\AppData\Local\Temp\reguldownloaddata.exe
        "C:\Users\Admin\AppData\Local\Temp\reguldownloaddata.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        PID:2732
      • C:\Users\Admin\AppData\Local\Temp\5r5hO2.exe
        "C:\Users\Admin\AppData\Local\Temp\5r5hO2.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2736
        • C:\Users\Admin\AppData\Local\Temp\5r5hO2.exe
          "C:\Users\Admin\AppData\Local\Temp\5r5hO2.exe"
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Writes to the Master Boot Record (MBR)
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:772
          • C:\Users\Admin\AppData\Local\Temp\5r5hO2.exe
            "C:\Users\Admin\AppData\Local\Temp\5r5hO2.exe"
            5⤵
            • Modifies WinLogon for persistence
            • Adds policy Run key to start application
            • Executes dropped EXE
            • Loads dropped DLL
            • Adds Run key to start application
            • System Location Discovery: System Language Discovery
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:2264
            • C:\Windows\SysWOW64\netsh.exe
              netsh advfirewall firewall add rule name="Nero" dir=in action=allow description="Multimedia suite" program="C:\Users\Admin\AppData\Roaming\Microsoft\csrss.exe" enable=yes
              6⤵
              • Modifies Windows Firewall
              • Event Triggered Execution: Netsh Helper DLL
              • System Location Discovery: System Language Discovery
              • System Time Discovery
              PID:780
            • C:\Users\Admin\AppData\Roaming\Microsoft\csrss.exe
              C:\Users\Admin\AppData\Local\Temp\5r5hO2.exe
              6⤵
              • Executes dropped EXE
              • Suspicious use of SetThreadContext
              • System Location Discovery: System Language Discovery
              • Suspicious use of SetWindowsHookEx
              • Suspicious use of WriteProcessMemory
              PID:2772
              • C:\Users\Admin\AppData\Roaming\Microsoft\csrss.exe
                C:\Users\Admin\AppData\Local\Temp\5r5hO2.exe
                7⤵
                • Executes dropped EXE
                • Writes to the Master Boot Record (MBR)
                • Suspicious use of SetThreadContext
                • System Location Discovery: System Language Discovery
                • Suspicious use of SetWindowsHookEx
                • Suspicious use of WriteProcessMemory
                PID:864
                • C:\Users\Admin\AppData\Roaming\Microsoft\csrss.exe
                  C:\Users\Admin\AppData\Local\Temp\5r5hO2.exe
                  8⤵
                  • Executes dropped EXE
                  • System Location Discovery: System Language Discovery
                  • Suspicious use of SetWindowsHookEx
                  PID:2948

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • \Users\Admin\AppData\Local\Temp\5r5hO2.exe

          Filesize

          364KB

          MD5

          950bf772d9bccfc9bc67080f39d2f02d

          SHA1

          48a8654408ebc715222fff31dccdb8d322d458fc

          SHA256

          bedb145f62b54a2068c05336d139a114f2668fabcbd3af67546203ede60d55cd

          SHA512

          d9e6ce9b2320dda780e5a2ad9c75532d17bf4e41289611b9cb92ca979bba1ae41a7fd77564e2a38b499211706f9ddb350d342a5c7b5cce44b3093d36d58c694b

        • \Users\Admin\AppData\Local\Temp\reguldownloaddata.exe

          Filesize

          76KB

          MD5

          8d86e2bfaa3a58d5315e529db2110fb6

          SHA1

          76e7fd12b199fda99463fca4bd74c98bc4f9514c

          SHA256

          6b6154c34df4a4036146e014e3f5d7dd92da68ba321b729035a45780559f534e

          SHA512

          fb31f227c68cf0dace1e6952992707d4e69138fe0f59254f513ee14ddb8cd656b76d388d53cd551fc63af62157991da0221f6e903a3c59a883d07ad5a2278512

        • memory/772-42-0x0000000000400000-0x000000000042D000-memory.dmp

          Filesize

          180KB

        • memory/772-71-0x0000000000400000-0x000000000042D000-memory.dmp

          Filesize

          180KB

        • memory/772-44-0x0000000000400000-0x000000000042D000-memory.dmp

          Filesize

          180KB

        • memory/772-46-0x0000000000400000-0x000000000042D000-memory.dmp

          Filesize

          180KB

        • memory/772-52-0x0000000000400000-0x000000000042D000-memory.dmp

          Filesize

          180KB

        • memory/772-55-0x0000000000400000-0x000000000042D000-memory.dmp

          Filesize

          180KB

        • memory/864-112-0x0000000000400000-0x000000000042D000-memory.dmp

          Filesize

          180KB

        • memory/2264-63-0x0000000000400000-0x0000000000423000-memory.dmp

          Filesize

          140KB

        • memory/2264-85-0x0000000000400000-0x0000000000423000-memory.dmp

          Filesize

          140KB

        • memory/2264-59-0x0000000000400000-0x0000000000423000-memory.dmp

          Filesize

          140KB

        • memory/2264-61-0x0000000000400000-0x0000000000423000-memory.dmp

          Filesize

          140KB

        • memory/2264-66-0x0000000000400000-0x0000000000423000-memory.dmp

          Filesize

          140KB

        • memory/2844-17-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2844-2-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2844-13-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2844-4-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2844-14-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2844-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          Filesize

          4KB

        • memory/2844-6-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2844-139-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2948-137-0x0000000000400000-0x0000000000423000-memory.dmp

          Filesize

          140KB