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Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/12/2024, 01:10

General

  • Target

    K98766700.exe

  • Size

    589KB

  • MD5

    e39c7cf026df55a909a7e18eea93b027

  • SHA1

    1a41eb5df90bcc53c0a80ce38fa99747de6eb237

  • SHA256

    b862fbe92f3de0e033b66e3c9d3afad4d6ff41d8b3553094f66a98db6ba59f0c

  • SHA512

    711c3fddc4aaa37afa6f1c11ff426edfe19ebfae6d955abd23699887d9cf5f31038c2812ac526190d3c7d4fa7a094117be45d75acc6b16fd80c1d13d2eb426f6

  • SSDEEP

    12288:zVAf8axZKrGhdYzjLKUxlyQs6U2+8sq6hcBy+QjnHYyFhqaX3ub:GZKrudYzjL/xp95b6RbCaX3ub

Malware Config

Extracted

Credentials

  • Protocol:
    ftp
  • Host:
    ftp.antoniomayol.com
  • Port:
    21
  • Username:
    [email protected]
  • Password:
    cMhKDQUk1{;%

Extracted

Family

agenttesla

Credentials

  • Protocol:
    ftp
  • Host:
    ftp://ftp.antoniomayol.com:21
  • Port:
    21
  • Username:
    [email protected]
  • Password:
    cMhKDQUk1{;%

Signatures

  • AgentTesla

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

  • Agenttesla family
  • UAC bypass 3 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 2 IoCs
  • Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Looks for VMWare Tools registry key 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Windows security modification 2 TTPs 3 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 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.

  • Maps connected drives based on registry 3 TTPs 2 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\K98766700.exe
    "C:\Users\Admin\AppData\Local\Temp\K98766700.exe"
    1⤵
    • UAC bypass
    • Windows security bypass
    • Looks for VirtualBox Guest Additions in registry
    • Looks for VMWare Tools registry key
    • Checks BIOS information in registry
    • Checks computer location settings
    • Windows security modification
    • Checks whether UAC is enabled
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:3276
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\K98766700.exe" -Force
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:756
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe"
      2⤵
        PID:5028
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe"
        2⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4856
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe"
        2⤵
          PID:1108

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vnrzl5wc.ovu.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • memory/756-10-0x000002317EAA0000-0x000002317EAC2000-memory.dmp

        Filesize

        136KB

      • memory/756-19-0x00007FF9CFB50000-0x00007FF9D0611000-memory.dmp

        Filesize

        10.8MB

      • memory/756-11-0x00007FF9CFB50000-0x00007FF9D0611000-memory.dmp

        Filesize

        10.8MB

      • memory/756-4-0x00007FF9CFB50000-0x00007FF9D0611000-memory.dmp

        Filesize

        10.8MB

      • memory/3276-22-0x00007FF9CFB50000-0x00007FF9D0611000-memory.dmp

        Filesize

        10.8MB

      • memory/3276-3-0x00007FF9CFB50000-0x00007FF9D0611000-memory.dmp

        Filesize

        10.8MB

      • memory/3276-2-0x000001B825F70000-0x000001B826004000-memory.dmp

        Filesize

        592KB

      • memory/3276-1-0x000001B80BAF0000-0x000001B80BB88000-memory.dmp

        Filesize

        608KB

      • memory/3276-0-0x00007FF9CFB53000-0x00007FF9CFB55000-memory.dmp

        Filesize

        8KB

      • memory/4856-16-0x0000000000400000-0x0000000000442000-memory.dmp

        Filesize

        264KB

      • memory/4856-20-0x0000000005830000-0x0000000005DD4000-memory.dmp

        Filesize

        5.6MB

      • memory/4856-21-0x0000000005200000-0x0000000005266000-memory.dmp

        Filesize

        408KB

      • memory/4856-23-0x00000000069F0000-0x0000000006A40000-memory.dmp

        Filesize

        320KB

      • memory/4856-24-0x0000000006AE0000-0x0000000006B7C000-memory.dmp

        Filesize

        624KB

      • memory/4856-25-0x0000000006C20000-0x0000000006CB2000-memory.dmp

        Filesize

        584KB

      • memory/4856-26-0x0000000006BA0000-0x0000000006BAA000-memory.dmp

        Filesize

        40KB