Analysis

  • max time kernel
    150s
  • max time network
    119s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    15-07-2021 12:32

General

  • Target

    TU09000090.exe

  • Size

    678KB

  • MD5

    58d412f616a769bcca7441a8d5408cf3

  • SHA1

    a051fb0ed9bfc514a1c792fada3582017034da49

  • SHA256

    8d3cd8573aa9b73d387284b0bd7421daf2914774153423ad74c837361b822782

  • SHA512

    78e47adbe51a689210587a38c6656d936fa3544128ec1894f841d198d0025e3d52e922681c1251b050c60b39374f2e187b8c61a7972770f077f4fd0fb955f387

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 4 IoCs
  • A310logger Executable 8 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.

  • 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). Likely ransomware behaviour.

  • Checks processor information in registry 2 TTPs 6 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 4 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\TU09000090.exe
    "C:\Users\Admin\AppData\Local\Temp\TU09000090.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:992
    • C:\Users\Admin\AppData\Local\Temp\TU09000090.exe
      "C:\Users\Admin\AppData\Local\Temp\TU09000090.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1280
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe
        "C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe"
        3⤵
        • Checks processor information in registry
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1852
        • 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:2052
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe
        "C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe"
        3⤵
        • Checks processor information in registry
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3960
        • 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:2232
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe
        "C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe"
        3⤵
        • Checks processor information in registry
        PID:3956

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

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

    MD5

    0d96352b982082afe2903d10c1b819a2

    SHA1

    37067f1193b4a3deaf27f35a09ddba8e2adee680

    SHA256

    825a471d43d2b81bed778b2bd7a3bf1a2b22a81c3b0de3c68bc2aa9c5bebcec2

    SHA512

    e55862d182b1f1bc1b296cb213e2c576f545120678e2be930dbcf764069ecb9eb3737cfa010c0a4861a5a20605bfae42a49b955d80006c52bd1486b7134bc2af

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

    MD5

    a62535934fa7300b21d015be8236a2e5

    SHA1

    d94f020f9f0f299c46c0ce9b141a3b9da0f32814

    SHA256

    3efaf87f4602570f0be76f4bd246425060a2731f83aec474d7f354f8e6f62c70

    SHA512

    69761425416d2de37dc8934232160e2b8912b433cf8cbfc5505bc00d0c227624808c6414297addb91c966ff27045e9c4679af916efb563576c6fa23fdff1c5a5

  • 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

  • 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

  • memory/992-120-0x00000000049B0000-0x00000000049B1000-memory.dmp

    Filesize

    4KB

  • memory/992-121-0x0000000004940000-0x0000000004E3E000-memory.dmp

    Filesize

    5.0MB

  • memory/992-123-0x0000000004E10000-0x0000000004E1F000-memory.dmp

    Filesize

    60KB

  • memory/992-116-0x0000000004E40000-0x0000000004E41000-memory.dmp

    Filesize

    4KB

  • memory/992-122-0x0000000005540000-0x00000000055B1000-memory.dmp

    Filesize

    452KB

  • memory/992-117-0x00000000049E0000-0x00000000049E1000-memory.dmp

    Filesize

    4KB

  • memory/992-118-0x0000000004A80000-0x0000000004A81000-memory.dmp

    Filesize

    4KB

  • memory/992-119-0x0000000004B00000-0x0000000004B01000-memory.dmp

    Filesize

    4KB

  • memory/992-114-0x0000000000090000-0x0000000000091000-memory.dmp

    Filesize

    4KB

  • memory/1280-124-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/1280-125-0x00000000004024E0-mapping.dmp

  • memory/1852-130-0x0000000000EF0000-0x0000000000EF1000-memory.dmp

    Filesize

    4KB

  • memory/1852-129-0x0000000000412452-mapping.dmp

  • memory/1852-128-0x0000000000400000-0x0000000000418000-memory.dmp

    Filesize

    96KB

  • memory/2052-131-0x0000000000000000-mapping.dmp

  • memory/2052-134-0x00000000007F0000-0x00000000007F2000-memory.dmp

    Filesize

    8KB

  • memory/2232-139-0x0000000000000000-mapping.dmp

  • memory/2232-143-0x0000000002540000-0x0000000002542000-memory.dmp

    Filesize

    8KB

  • memory/3956-145-0x0000000000412452-mapping.dmp

  • memory/3956-146-0x0000000002A40000-0x0000000002A41000-memory.dmp

    Filesize

    4KB

  • memory/3960-138-0x0000000002F20000-0x0000000002F21000-memory.dmp

    Filesize

    4KB

  • memory/3960-136-0x0000000000412452-mapping.dmp