Analysis

  • max time kernel
    123s
  • max time network
    128s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    04-01-2024 19:53

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 7 IoCs
  • A310logger Executable 8 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 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).

  • 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 2 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 45 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:2360
    • 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:2148
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe
        "C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe"
        3⤵
        • Loads dropped DLL
        • Accesses Microsoft Outlook profiles
        • Checks processor information in registry
        • Suspicious use of WriteProcessMemory
        PID:2388
        • 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:2636
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe
        "C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe"
        3⤵
        • Loads dropped DLL
        • Accesses Microsoft Outlook profiles
        • Checks processor information in registry
        • Suspicious use of WriteProcessMemory
        • outlook_office_path
        • outlook_win_path
        PID:2028
        • 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:1144
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe
        "C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe"
        3⤵
          PID:2156

    Network

    MITRE ATT&CK Matrix ATT&CK v13

    Credential Access

    Unsecured Credentials

    2
    T1552

    Credentials In Files

    2
    T1552.001

    Discovery

    System Information Discovery

    2
    T1082

    Query Registry

    1
    T1012

    Collection

    Data from Local System

    2
    T1005

    Email Collection

    1
    T1114

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
      Filesize

      65KB

      MD5

      ac05d27423a85adc1622c714f2cb6184

      SHA1

      b0fe2b1abddb97837ea0195be70ab2ff14d43198

      SHA256

      c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

      SHA512

      6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
      Filesize

      64KB

      MD5

      d71dff97ca86ca16c3db8bdb5285fb35

      SHA1

      271c01246897497d069b81ed37af296cf6c1e498

      SHA256

      4a19255504acfbd49c4e1aed722c7e62b50b5742b860eedabc5f46160f8aefac

      SHA512

      1fed2a183296b563e35d803927e539d28169895f6ca5b522a1c714f222a2d3e578b1e167b19568b5ad4800b898f7ac041c7bd8f6bb02d1361b32cbdcfb0f682a

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\F0ACCF77CDCBFF39F6191887F6D2D357
      Filesize

      1KB

      MD5

      a266bb7dcc38a562631361bbf61dd11b

      SHA1

      3b1efd3a66ea28b16697394703a72ca340a05bd5

      SHA256

      df545bf919a2439c36983b54cdfc903dfa4f37d3996d8d84b4c31eec6f3c163e

      SHA512

      0da8ef4f8f6ed3d16d2bc8eb816b9e6e1345dfe2d91160196c47e6149a1d6aedaafadcefd66acdea7f72dcf0832770192ceac15b0c559c4ccc2c0e5581d5aefc

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
      Filesize

      344B

      MD5

      9789cff2eabfef846a01b5c18f2a155b

      SHA1

      e247e93a494cdd116d2a5140fa368373e9eb7459

      SHA256

      20c4ca7f2f62b70aff4a44a8a43088e476992aa049120bcf051ae779f5ddbb12

      SHA512

      c021f73cc41f5a44b652a74b6a8c3db0f9580f36736e76b9705685855906295ce3c0c53be14e522a225b85c15a13696d7b08d9d5e35a4dbb9fe1933e39b4128e

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\F0ACCF77CDCBFF39F6191887F6D2D357
      Filesize

      242B

      MD5

      e72b08e1dd40ffccdc3dc94ee5ff8638

      SHA1

      22c64bcc122f52def811678a1a562c2fe6955dd4

      SHA256

      1c6a79fc09941123889d238de11198572154b5737758818d59e1b10e5cefa3e9

      SHA512

      917617e718e148cab412dab7c7921c07c2f8f58a051603e9584b2fe102fba1bb6c51a60a6702d59254ee2eade82de0d71358d45ddd9810d8d0f94df07deb7958

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

      20KB

      MD5

      1bad0cbd09b05a21157d8255dc801778

      SHA1

      ff284bba12f011b72e20d4c9537d6c455cdbf228

      SHA256

      218073bda7a00e780704c1289d5e22ad27bb3ba11f210afa18af33a6ad5176e9

      SHA512

      4fea56812eba1f1bba17f20d06b509e2a3b4e138562e53c230d0736d596abed4a6a3e43e26936fcd6d107924c8bba41885f34901afa4fd0d37d7e4a93c9b8533

    • memory/1144-171-0x000007FEF5140000-0x000007FEF5ADD000-memory.dmp
      Filesize

      9.6MB

    • memory/1144-170-0x000007FEF5140000-0x000007FEF5ADD000-memory.dmp
      Filesize

      9.6MB

    • memory/2028-138-0x0000000000400000-0x0000000000418000-memory.dmp
      Filesize

      96KB

    • memory/2028-140-0x0000000000400000-0x0000000000418000-memory.dmp
      Filesize

      96KB

    • memory/2028-172-0x00000000744D0000-0x0000000074A7B000-memory.dmp
      Filesize

      5.7MB

    • memory/2028-134-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
      Filesize

      4KB

    • memory/2028-141-0x00000000744D0000-0x0000000074A7B000-memory.dmp
      Filesize

      5.7MB

    • memory/2028-142-0x0000000000750000-0x0000000000790000-memory.dmp
      Filesize

      256KB

    • memory/2028-143-0x00000000744D0000-0x0000000074A7B000-memory.dmp
      Filesize

      5.7MB

    • memory/2148-8-0x0000000000400000-0x0000000000430000-memory.dmp
      Filesize

      192KB

    • memory/2148-5-0x0000000000400000-0x0000000000430000-memory.dmp
      Filesize

      192KB

    • memory/2148-3-0x0000000000400000-0x0000000000430000-memory.dmp
      Filesize

      192KB

    • memory/2148-123-0x0000000000400000-0x0000000000430000-memory.dmp
      Filesize

      192KB

    • memory/2156-174-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
      Filesize

      4KB

    • memory/2360-2-0x0000000000080000-0x0000000000082000-memory.dmp
      Filesize

      8KB

    • memory/2360-1-0x00000000002D0000-0x00000000003D0000-memory.dmp
      Filesize

      1024KB

    • memory/2388-13-0x0000000000400000-0x0000000000418000-memory.dmp
      Filesize

      96KB

    • memory/2388-26-0x00000000745B0000-0x0000000074B5B000-memory.dmp
      Filesize

      5.7MB

    • memory/2388-17-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
      Filesize

      4KB

    • memory/2388-24-0x00000000745B0000-0x0000000074B5B000-memory.dmp
      Filesize

      5.7MB

    • memory/2388-15-0x0000000000400000-0x0000000000418000-memory.dmp
      Filesize

      96KB

    • memory/2388-122-0x00000000745B0000-0x0000000074B5B000-memory.dmp
      Filesize

      5.7MB

    • memory/2388-9-0x0000000000400000-0x0000000000418000-memory.dmp
      Filesize

      96KB

    • memory/2388-23-0x0000000000400000-0x0000000000418000-memory.dmp
      Filesize

      96KB

    • memory/2388-25-0x00000000002D0000-0x0000000000310000-memory.dmp
      Filesize

      256KB

    • memory/2388-19-0x0000000000400000-0x0000000000418000-memory.dmp
      Filesize

      96KB

    • memory/2388-21-0x0000000000400000-0x0000000000418000-memory.dmp
      Filesize

      96KB

    • memory/2388-11-0x0000000000400000-0x0000000000418000-memory.dmp
      Filesize

      96KB

    • memory/2636-124-0x000007FEF5AE0000-0x000007FEF647D000-memory.dmp
      Filesize

      9.6MB

    • memory/2636-121-0x000007FEF5AE0000-0x000007FEF647D000-memory.dmp
      Filesize

      9.6MB