Analysis

  • max time kernel
    118s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    26-03-2024 02:33

General

  • Target

    66939cad8ad6ea772c4f93509fb43a63635024fcaf22605af3f6016a9bbc429b.xlam

  • Size

    700KB

  • MD5

    f8798b71a4fbd1465cdff6564bae7ee8

  • SHA1

    fafb4ef1565a1b70c7b716924815ef4ca24c2892

  • SHA256

    66939cad8ad6ea772c4f93509fb43a63635024fcaf22605af3f6016a9bbc429b

  • SHA512

    3585de2a710028297c41cc0de204466bbed4434eecb2293247a0f5d3327ee0a87d3f38c54d6530a71a7a6dc6634f7153fd3a03584f6b54f68b4f8e7602e85c9d

  • SSDEEP

    12288:QjxdXgLho7M8ONl4/pUPhVa45JM3hdh4pxrlIrN4Y8guHHH8aVzVtuIHzdA0bH1:kxJgV8XRUZVxkdgBqrN854IHOA

Malware Config

Extracted

Family

agenttesla

Credentials

Signatures

  • AgentTesla

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

  • Detect packed .NET executables. Mostly AgentTeslaV4. 4 IoCs
  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • AutoIT Executable 1 IoCs

    AutoIT scripts compiled to PE executables.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Launches Equation Editor 1 TTPs 1 IoCs

    Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\66939cad8ad6ea772c4f93509fb43a63635024fcaf22605af3f6016a9bbc429b.xlam
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:2856
  • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
    "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
    1⤵
    • Blocklisted process makes network request
    • Loads dropped DLL
    • Launches Equation Editor
    • Suspicious use of WriteProcessMemory
    PID:3012
    • C:\Users\Admin\AppData\Local\Temp\pwyysiso.exe
      "C:\Users\Admin\AppData\Local\Temp\pwyysiso.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:2668
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
        "C:\Users\Admin\AppData\Local\Temp\pwyysiso.exe"
        3⤵
        • Accesses Microsoft Outlook profiles
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • outlook_office_path
        • outlook_win_path
        PID:2396

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\pwyysiso.exe

    Filesize

    1.1MB

    MD5

    41685eda86fd0c3580849308a25b4a9d

    SHA1

    b497bde46d77522ae99ba0a3b06b0f0c930ee0ae

    SHA256

    0602f5f777f16e6eceba591204219845b53b8f82b130b0a58b384fa2c06983fe

    SHA512

    fa6eb2e1a4a3678dbe41f60cd84b581421db31dad46c6463fde2c2197c21f72e9c4731a9d88a3f0094876e778b154ef1f3eac2501ec01a17a41f41e1e14f2286

  • memory/2396-29-0x0000000004F50000-0x0000000004F90000-memory.dmp

    Filesize

    256KB

  • memory/2396-32-0x0000000004F50000-0x0000000004F90000-memory.dmp

    Filesize

    256KB

  • memory/2396-31-0x000000006C6A0000-0x000000006CD8E000-memory.dmp

    Filesize

    6.9MB

  • memory/2396-23-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/2396-25-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/2396-27-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/2396-28-0x000000006C6A0000-0x000000006CD8E000-memory.dmp

    Filesize

    6.9MB

  • memory/2668-22-0x00000000000F0000-0x00000000000F4000-memory.dmp

    Filesize

    16KB

  • memory/2856-30-0x0000000072BAD000-0x0000000072BB8000-memory.dmp

    Filesize

    44KB

  • memory/2856-0-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/2856-1-0x0000000072BAD000-0x0000000072BB8000-memory.dmp

    Filesize

    44KB

  • memory/2856-34-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/2856-35-0x0000000072BAD000-0x0000000072BB8000-memory.dmp

    Filesize

    44KB