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Analysis

  • max time kernel
    151s
  • max time network
    48s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    27/11/2022, 22:56

General

  • Target

    e3fd3e05a7bd5a85af2e0ee264d73eb76af885b3d2b054f6d4caa8e3e91118e0.exe

  • Size

    670KB

  • MD5

    5aa5d008136ee1d8ff62ed43d542347e

  • SHA1

    bed4c146c4ad8000ce9b7d3ebac027cf98190384

  • SHA256

    e3fd3e05a7bd5a85af2e0ee264d73eb76af885b3d2b054f6d4caa8e3e91118e0

  • SHA512

    f2e45c7d27bb72afc0dde33b6837c0ed842342e93e3894db0d665c97676346f5cd2c7e277bbe14b6279635cfca49de550ee6a43dfb5abcde7f2cacd8fcde727b

  • SSDEEP

    12288:DU5AxENsBnveIebg0zOOeE32U/0XjjWY0nPVSr1xAFbao:g5cvEbNyOeETEjKYEPVSZK5

Malware Config

Signatures

  • ISR Stealer

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

  • ISR Stealer payload 5 IoCs
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • NirSoft MailPassView 3 IoCs

    Password recovery tool for various email clients

  • Nirsoft 3 IoCs
  • Drops file in Drivers directory 1 IoCs
  • UPX packed file 10 IoCs

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

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e3fd3e05a7bd5a85af2e0ee264d73eb76af885b3d2b054f6d4caa8e3e91118e0.exe
    "C:\Users\Admin\AppData\Local\Temp\e3fd3e05a7bd5a85af2e0ee264d73eb76af885b3d2b054f6d4caa8e3e91118e0.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Drops file in Drivers directory
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1020
    • C:\Users\Admin\AppData\Local\Temp\e3fd3e05a7bd5a85af2e0ee264d73eb76af885b3d2b054f6d4caa8e3e91118e0.exe
      "C:\Users\Admin\AppData\Local\Temp\e3fd3e05a7bd5a85af2e0ee264d73eb76af885b3d2b054f6d4caa8e3e91118e0.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:108
      • C:\Users\Admin\AppData\Local\Temp\e3fd3e05a7bd5a85af2e0ee264d73eb76af885b3d2b054f6d4caa8e3e91118e0.exe
        /scomma "C:\Users\Admin\AppData\Local\Temp\Jy0GASiv5A.ini"
        3⤵
          PID:2032
        • C:\Users\Admin\AppData\Local\Temp\e3fd3e05a7bd5a85af2e0ee264d73eb76af885b3d2b054f6d4caa8e3e91118e0.exe
          /scomma "C:\Users\Admin\AppData\Local\Temp\tivCtlvzNw.ini"
          3⤵
          • Accesses Microsoft Outlook accounts
          PID:1568

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/108-74-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/108-58-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/108-57-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/108-60-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/108-62-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/108-85-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/1020-55-0x0000000074460000-0x0000000074A0B000-memory.dmp

      Filesize

      5.7MB

    • memory/1020-56-0x0000000074460000-0x0000000074A0B000-memory.dmp

      Filesize

      5.7MB

    • memory/1020-54-0x00000000762D1000-0x00000000762D3000-memory.dmp

      Filesize

      8KB

    • memory/1568-76-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/1568-80-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/1568-81-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/1568-82-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/1568-84-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/2032-73-0x0000000000400000-0x0000000000453000-memory.dmp

      Filesize

      332KB

    • memory/2032-72-0x0000000000400000-0x0000000000453000-memory.dmp

      Filesize

      332KB

    • memory/2032-75-0x0000000000400000-0x0000000000453000-memory.dmp

      Filesize

      332KB

    • memory/2032-83-0x0000000000400000-0x0000000000453000-memory.dmp

      Filesize

      332KB

    • memory/2032-68-0x0000000000400000-0x0000000000453000-memory.dmp

      Filesize

      332KB