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25/02/2024, 01:18

240225-bnxheahe87 10

Analysis

  • max time kernel
    138s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    25/02/2024, 01:18

General

  • Target

    44f706c6348828fd978cbe2fb035450175276e11f75717df19fd513d9116a585.exe

  • Size

    95KB

  • MD5

    89bc6750ff71019eab26fe5284a762df

  • SHA1

    fc3c19e874aa6ce6c035c63bbd50101680cd1ceb

  • SHA256

    44f706c6348828fd978cbe2fb035450175276e11f75717df19fd513d9116a585

  • SHA512

    71134c5b76a9fa69e18d12d8ea028209eae2d5f35fbded393efaaa392ae67341cc228b4e21dc876f050c12211282c1061a48a4351d5a8b16fea9e4a74677cdbb

  • SSDEEP

    1536:XGD5sF8F2tS9mpUPG+vsyKO9+6wg7Dg1DjixS1nb5gHhBP8Okl+jnGUGYebmsYxh:XGD5siwtS9mpYiy5DwjCcb5gBBP8QyRw

Malware Config

Extracted

Family

agenttesla

Credentials

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • Contacts a large (5036) amount of remote hosts 1 TTPs

    This may indicate a network scan to discover remotely running services.

  • Reads WinSCP keys stored on the system 2 TTPs

    Tries to access WinSCP stored sessions.

  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Creates a large amount of network flows 1 TTPs

    This may indicate a network scan to discover remotely running services.

  • Looks up external IP address via web service 1 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 27 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\44f706c6348828fd978cbe2fb035450175276e11f75717df19fd513d9116a585.exe
    "C:\Users\Admin\AppData\Local\Temp\44f706c6348828fd978cbe2fb035450175276e11f75717df19fd513d9116a585.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Modifies system certificate store
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1896
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe"
      2⤵
        PID:2636
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe"
        2⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2552
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe"
        2⤵
          PID:2836

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\Cab5524.tmp

        Filesize

        65KB

        MD5

        ac05d27423a85adc1622c714f2cb6184

        SHA1

        b0fe2b1abddb97837ea0195be70ab2ff14d43198

        SHA256

        c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

        SHA512

        6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

      • C:\Users\Admin\AppData\Local\Temp\Tar5565.tmp

        Filesize

        171KB

        MD5

        9c0c641c06238516f27941aa1166d427

        SHA1

        64cd549fb8cf014fcd9312aa7a5b023847b6c977

        SHA256

        4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f

        SHA512

        936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06

      • memory/1896-0-0x0000000000AE0000-0x0000000000AFC000-memory.dmp

        Filesize

        112KB

      • memory/1896-1-0x000007FEF5A60000-0x000007FEF644C000-memory.dmp

        Filesize

        9.9MB

      • memory/1896-2-0x000000001B330000-0x000000001B3B0000-memory.dmp

        Filesize

        512KB

      • memory/1896-142-0x000007FEF5A60000-0x000007FEF644C000-memory.dmp

        Filesize

        9.9MB

      • memory/1896-143-0x000000001B330000-0x000000001B3B0000-memory.dmp

        Filesize

        512KB

      • memory/1896-144-0x000000001B590000-0x000000001B626000-memory.dmp

        Filesize

        600KB

      • memory/1896-159-0x000007FEF5A60000-0x000007FEF644C000-memory.dmp

        Filesize

        9.9MB

      • memory/2552-153-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2552-154-0x0000000000400000-0x0000000000442000-memory.dmp

        Filesize

        264KB

      • memory/2552-156-0x0000000000400000-0x0000000000442000-memory.dmp

        Filesize

        264KB

      • memory/2552-158-0x0000000000400000-0x0000000000442000-memory.dmp

        Filesize

        264KB

      • memory/2636-147-0x0000000000400000-0x0000000000442000-memory.dmp

        Filesize

        264KB

      • memory/2636-148-0x0000000000400000-0x0000000000442000-memory.dmp

        Filesize

        264KB

      • memory/2636-146-0x0000000000400000-0x0000000000442000-memory.dmp

        Filesize

        264KB

      • memory/2636-145-0x0000000000400000-0x0000000000442000-memory.dmp

        Filesize

        264KB