Analysis

  • max time kernel
    151s
  • max time network
    123s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    03-09-2021 06:21

General

  • Target

    9088890000.exe

  • Size

    383KB

  • MD5

    df3de39ce7d9c7c7cb1fca65ef4fb6d3

  • SHA1

    f8dfffbf857a583f4d24cddbf741120a080cef71

  • SHA256

    c8d68c59e8f4cf194e50766e00d0fa72bba828a43ce4405fc195e3d27d9e4b6f

  • SHA512

    85a88ef177f795e9694a988ffda710d97a7037ec2e7ed16c6c7f01476acae564baa6994804d057a440a98ab9563a098f80dc4b2e77cf5d69adfaa466ed5d22bc

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 3 IoCs
  • A310logger Executable 7 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.

  • Program crash 1 IoCs
  • Checks processor information in registry 2 TTPs 4 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 4 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

Processes

  • C:\Users\Admin\AppData\Local\Temp\9088890000.exe
    "C:\Users\Admin\AppData\Local\Temp\9088890000.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:3932
    • C:\Users\Admin\AppData\Local\Temp\9088890000.exe
      "C:\Users\Admin\AppData\Local\Temp\9088890000.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1100
      • 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:2572
        • 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:1996
      • 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:3748
        • 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:3928
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe
        "C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe"
        3⤵
          PID:3832
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 3832 -s 88
            4⤵
            • Program crash
            PID:2656

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Credential Access

    Credentials in Files

    2
    T1081

    Discovery

    System Information Discovery

    2
    T1082

    Query Registry

    1
    T1012

    Collection

    Data from Local System

    2
    T1005

    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/1100-118-0x0000000000400000-0x0000000000430000-memory.dmp
      Filesize

      192KB

    • memory/1100-114-0x00000000004024E0-mapping.dmp
    • memory/1996-122-0x0000000000000000-mapping.dmp
    • memory/1996-125-0x0000000001070000-0x0000000001072000-memory.dmp
      Filesize

      8KB

    • memory/2572-120-0x0000000000412452-mapping.dmp
    • memory/2572-121-0x00000000031D0000-0x00000000031D1000-memory.dmp
      Filesize

      4KB

    • memory/2572-119-0x0000000000400000-0x0000000000418000-memory.dmp
      Filesize

      96KB

    • memory/3748-127-0x0000000000412452-mapping.dmp
    • memory/3748-129-0x0000000003130000-0x0000000003131000-memory.dmp
      Filesize

      4KB

    • memory/3832-136-0x0000000000412452-mapping.dmp
    • memory/3928-130-0x0000000000000000-mapping.dmp
    • memory/3928-134-0x00000000017D0000-0x00000000017D2000-memory.dmp
      Filesize

      8KB

    • memory/3932-117-0x00000000001E0000-0x00000000001E2000-memory.dmp
      Filesize

      8KB