Analysis

  • max time kernel
    110s
  • max time network
    104s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-12-2023 22:59

General

  • Target

    41c3b05debb26645393a5c7253f28e77.exe

  • Size

    594KB

  • MD5

    41c3b05debb26645393a5c7253f28e77

  • SHA1

    e1e8fcfdc15c34f7e1ce974e4278e79879fe86ae

  • SHA256

    584a847c7e779a2951440152072b93e4ecccb1b86148a2e289c2ccb86962ac34

  • SHA512

    c24771dee7d0e7651b2530623332c28b434da98cc3dbadf3af597225d71a9f2c699bd65f9155424ded2e3902ca1a2f63bc234345b10db9f06e724e9d90ec8351

  • SSDEEP

    12288:SfX25LrCxNuYlc+zakllH7RaR00QHtHx6fsZAvantxK13v6pcL4cUikDXR6sVc+i:SfX25LrCxNuYlcSXt0ehkASIN3CTmv+

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 4 IoCs
  • Executes dropped EXE 2 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.

  • Accesses Microsoft Outlook profiles 1 TTPs 6 IoCs
  • 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 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 2 IoCs
  • Checks processor information in registry 2 TTPs 4 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\41c3b05debb26645393a5c7253f28e77.exe
    "C:\Users\Admin\AppData\Local\Temp\41c3b05debb26645393a5c7253f28e77.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:3924
    • C:\Users\Admin\AppData\Local\Temp\41c3b05debb26645393a5c7253f28e77.exe
      "C:\Users\Admin\AppData\Local\Temp\41c3b05debb26645393a5c7253f28e77.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1236
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe
        "C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe"
        3⤵
        • Accesses Microsoft Outlook profiles
        • Checks processor information in registry
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1992
        • 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:1028
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe
        "C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe"
        3⤵
        • Accesses Microsoft Outlook profiles
        • Checks processor information in registry
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        • outlook_office_path
        • outlook_win_path
        PID:332
        • 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:3024
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe
        "C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe"
        3⤵
          PID:4748
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 4748 -s 80
            4⤵
            • Program crash
            PID:2664
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 3924 -s 368
        2⤵
        • Program crash
        PID:1228
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 3924 -ip 3924
      1⤵
        PID:3712
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4748 -ip 4748
        1⤵
          PID:3884

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0\UsageLogs\MZ.exe.log

          Filesize

          128B

          MD5

          3d238ac6dd6710907edf2ad7893a0ed2

          SHA1

          b07aaeeb31bdc6e94097a254be088b092dc1fb68

          SHA256

          02d215d5b6ea166e6c4c4669547cbadecbb427d5baf394fbffc7ef374a967501

          SHA512

          c358aa68303aa99ebc019014b4c1fc2fbfa98733f1ea863bf78ca2b877dc5c610121115432d96504df9e43bdda637b067359b07228b6f129bc5ec9a01ed3ee24

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\InstallUtil.exe.log

          Filesize

          496B

          MD5

          5370d1dff94d27a9a6cfab002a5c444b

          SHA1

          fecadd9e884c57822ebeae897a3989c0e678fd1a

          SHA256

          0ddb4ec9a919c3566a4ab48ce605f24816e6fb2efdd6e4070a54a1f5912ec946

          SHA512

          67a3787e49e7d8ea23b3e1766639b36e685cf404042bc270f5c43dc0b0f50623778cb98c013577b3a0a3b425b608ff4e944e29df3725425ce6383759fe7534eb

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

          Filesize

          20KB

          MD5

          1bad0cbd09b05a21157d8255dc801778

          SHA1

          ff284bba12f011b72e20d4c9537d6c455cdbf228

          SHA256

          218073bda7a00e780704c1289d5e22ad27bb3ba11f210afa18af33a6ad5176e9

          SHA512

          4fea56812eba1f1bba17f20d06b509e2a3b4e138562e53c230d0736d596abed4a6a3e43e26936fcd6d107924c8bba41885f34901afa4fd0d37d7e4a93c9b8533

        • memory/332-55-0x0000000073E30000-0x00000000743E1000-memory.dmp

          Filesize

          5.7MB

        • memory/332-38-0x0000000073E30000-0x00000000743E1000-memory.dmp

          Filesize

          5.7MB

        • memory/332-37-0x0000000001240000-0x0000000001250000-memory.dmp

          Filesize

          64KB

        • memory/332-36-0x0000000073E30000-0x00000000743E1000-memory.dmp

          Filesize

          5.7MB

        • memory/1028-29-0x00007FFBE86F0000-0x00007FFBE9091000-memory.dmp

          Filesize

          9.6MB

        • memory/1028-28-0x00007FFBE86F0000-0x00007FFBE9091000-memory.dmp

          Filesize

          9.6MB

        • memory/1028-23-0x00007FFBE86F0000-0x00007FFBE9091000-memory.dmp

          Filesize

          9.6MB

        • memory/1028-24-0x00000000019E0000-0x00000000019F0000-memory.dmp

          Filesize

          64KB

        • memory/1236-3-0x0000000000400000-0x0000000000430000-memory.dmp

          Filesize

          192KB

        • memory/1236-32-0x0000000000400000-0x0000000000430000-memory.dmp

          Filesize

          192KB

        • memory/1236-5-0x0000000000400000-0x0000000000430000-memory.dmp

          Filesize

          192KB

        • memory/1992-10-0x0000000001880000-0x0000000001890000-memory.dmp

          Filesize

          64KB

        • memory/1992-31-0x0000000073C20000-0x00000000741D1000-memory.dmp

          Filesize

          5.7MB

        • memory/1992-8-0x0000000000400000-0x0000000000418000-memory.dmp

          Filesize

          96KB

        • memory/1992-9-0x0000000073C20000-0x00000000741D1000-memory.dmp

          Filesize

          5.7MB

        • memory/1992-11-0x0000000073C20000-0x00000000741D1000-memory.dmp

          Filesize

          5.7MB

        • memory/3024-52-0x0000000001400000-0x0000000001410000-memory.dmp

          Filesize

          64KB

        • memory/3024-51-0x00007FFBE8160000-0x00007FFBE8B01000-memory.dmp

          Filesize

          9.6MB

        • memory/3024-54-0x00007FFBE8160000-0x00007FFBE8B01000-memory.dmp

          Filesize

          9.6MB

        • memory/3024-53-0x00007FFBE8160000-0x00007FFBE8B01000-memory.dmp

          Filesize

          9.6MB

        • memory/3024-56-0x00007FFBE8160000-0x00007FFBE8B01000-memory.dmp

          Filesize

          9.6MB

        • memory/3924-1-0x0000000000440000-0x0000000000540000-memory.dmp

          Filesize

          1024KB

        • memory/3924-2-0x0000000000A60000-0x0000000000A62000-memory.dmp

          Filesize

          8KB