Analysis

  • max time kernel
    153s
  • max time network
    138s
  • platform
    windows7_x64
  • resource
    win7-en
  • submitted
    03-09-2021 06:21

General

  • Target

    INVOICE#09090002.exe

  • Size

    592KB

  • MD5

    8146345093404dfc79a943b0da184e47

  • SHA1

    1472f04b7d707f523bc98975fc593c78ae5f4710

  • SHA256

    f0f118c8bca327b5a4d164509fae627e4bd37b087abc1b7c2e337bfc8e3ff90e

  • SHA512

    a8c3e5cb167bd8a104af57339cf997e052426817a4784bfde13e768d9f54aeee8bd39cad5ecbe4a61de561261709003caad7864d6e7b53871ae125c3d4d472cd

Malware Config

Signatures

  • A310logger

    A310 Logger is a .NET stealer/logger targeting passwords from browsers and email clients.

  • StormKitty

    StormKitty is an open source info stealer written in C#.

  • StormKitty Payload 2 IoCs
  • A310logger Executable 5 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads local data of messenger clients 2 TTPs

    Infostealers often target stored data of messaging applications, which can include saved credentials and account information.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Looks up geolocation information via web service

    Uses a legitimate geolocation service to find the infected system's geolocation info.

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 33 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\INVOICE#09090002.exe
    "C:\Users\Admin\AppData\Local\Temp\INVOICE#09090002.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1664
    • C:\Users\Admin\AppData\Local\Temp\INVOICE#09090002.exe
      "C:\Users\Admin\AppData\Local\Temp\INVOICE#09090002.exe"
      2⤵
        PID:1748
      • C:\Users\Admin\AppData\Local\Temp\INVOICE#09090002.exe
        "C:\Users\Admin\AppData\Local\Temp\INVOICE#09090002.exe"
        2⤵
          PID:1764
        • C:\Users\Admin\AppData\Local\Temp\INVOICE#09090002.exe
          "C:\Users\Admin\AppData\Local\Temp\INVOICE#09090002.exe"
          2⤵
          • Suspicious use of SetThreadContext
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:1736
          • C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe
            "C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe"
            3⤵
            • Loads dropped DLL
            • Checks processor information in registry
            • Suspicious use of WriteProcessMemory
            PID:1520
            • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\MZ.exe
              "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\MZ.exe"
              4⤵
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:1836

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\MZ.exe
        MD5

        1bad0cbd09b05a21157d8255dc801778

        SHA1

        ff284bba12f011b72e20d4c9537d6c455cdbf228

        SHA256

        218073bda7a00e780704c1289d5e22ad27bb3ba11f210afa18af33a6ad5176e9

        SHA512

        4fea56812eba1f1bba17f20d06b509e2a3b4e138562e53c230d0736d596abed4a6a3e43e26936fcd6d107924c8bba41885f34901afa4fd0d37d7e4a93c9b8533

      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\MZ.exe
        MD5

        1bad0cbd09b05a21157d8255dc801778

        SHA1

        ff284bba12f011b72e20d4c9537d6c455cdbf228

        SHA256

        218073bda7a00e780704c1289d5e22ad27bb3ba11f210afa18af33a6ad5176e9

        SHA512

        4fea56812eba1f1bba17f20d06b509e2a3b4e138562e53c230d0736d596abed4a6a3e43e26936fcd6d107924c8bba41885f34901afa4fd0d37d7e4a93c9b8533

      • \Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\MZ.exe
        MD5

        1bad0cbd09b05a21157d8255dc801778

        SHA1

        ff284bba12f011b72e20d4c9537d6c455cdbf228

        SHA256

        218073bda7a00e780704c1289d5e22ad27bb3ba11f210afa18af33a6ad5176e9

        SHA512

        4fea56812eba1f1bba17f20d06b509e2a3b4e138562e53c230d0736d596abed4a6a3e43e26936fcd6d107924c8bba41885f34901afa4fd0d37d7e4a93c9b8533

      • memory/1520-67-0x0000000000430000-0x0000000000431000-memory.dmp
        Filesize

        4KB

      • memory/1520-65-0x0000000000412452-mapping.dmp
      • memory/1520-64-0x0000000000400000-0x0000000000418000-memory.dmp
        Filesize

        96KB

      • memory/1664-55-0x00000000020E0000-0x0000000002151000-memory.dmp
        Filesize

        452KB

      • memory/1664-56-0x00000000002B0000-0x00000000002BF000-memory.dmp
        Filesize

        60KB

      • memory/1664-53-0x00000000002C0000-0x00000000002C1000-memory.dmp
        Filesize

        4KB

      • memory/1664-60-0x0000000004A20000-0x0000000004A21000-memory.dmp
        Filesize

        4KB

      • memory/1736-58-0x00000000004024E0-mapping.dmp
      • memory/1736-63-0x0000000075AD1000-0x0000000075AD3000-memory.dmp
        Filesize

        8KB

      • memory/1736-61-0x0000000000400000-0x0000000000430000-memory.dmp
        Filesize

        192KB

      • memory/1736-57-0x0000000000400000-0x0000000000430000-memory.dmp
        Filesize

        192KB

      • memory/1836-69-0x0000000000000000-mapping.dmp
      • memory/1836-72-0x0000000000230000-0x0000000000232000-memory.dmp
        Filesize

        8KB