Analysis

  • max time kernel
    119s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240215-en
  • resource tags

    arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
  • submitted
    21/05/2024, 03:07

General

  • Target

    21052024_0307_20052024_RFQ-P023102417.xlsx

  • Size

    1.1MB

  • MD5

    35c7b17806d7bf19b876494331facdc2

  • SHA1

    e329a04ca002bba4035156d0ede400ac76da3ff9

  • SHA256

    165b5c3138801714eac7bc3f21f48adcdf2974931f611c9297de06064f8f96aa

  • SHA512

    87e6df241de0b6bff063dc13e4017d61eacf539a3fff1a56168d2881fcac120ecd5bb985f8a91f7e75d4dbbdeb2561e930a4e3e5b1efeebeebbd02aa47b3047d

  • SSDEEP

    24576:KUYVW+vMHWCbBmvkFRdtdrzJXfHdzU/GZa4fsIchjz2X7ZD2Kcl:8JLCbBisdDrzcI6P/I7ZSKcl

Malware Config

Extracted

Family

agenttesla

Credentials

Signatures

  • AgentTesla

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

  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 7 IoCs
  • Looks up external IP address via web service 2 IoCs

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

  • 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 use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 16 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\21052024_0307_20052024_RFQ-P023102417.xlsx
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SetWindowsHookEx
    PID:2700
  • 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:2660
    • C:\Users\Admin\AppData\Roaming\word.exe
      C:\Users\Admin\AppData\Roaming\word.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:2688
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:2440
      • C:\Windows\system32\WerFault.exe
        C:\Windows\system32\WerFault.exe -u -p 2688 -s 620
        3⤵
        • Loads dropped DLL
        PID:2836

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Roaming\word.exe

          Filesize

          632KB

          MD5

          36bdaa02d3d80cf8d31b5771e3b2c230

          SHA1

          cba7d5e324e7efe15b101b1016be6142bc8f8093

          SHA256

          c1d0868e6ae011f7814cbeba2837f63d5ff5a23891a16942910ffc7c71c69601

          SHA512

          3999b42492c84bcb3f30677bf57876f24c5f261bd3b078731915662cbd493b2b575056e15beb0b65e5b0657575dd12f386b42c27ac517cbbf20940df15c91b9a

        • memory/2440-17-0x0000000000400000-0x0000000000440000-memory.dmp

          Filesize

          256KB

        • memory/2440-19-0x0000000000400000-0x0000000000440000-memory.dmp

          Filesize

          256KB

        • memory/2440-25-0x0000000000400000-0x0000000000440000-memory.dmp

          Filesize

          256KB

        • memory/2440-22-0x0000000000400000-0x0000000000440000-memory.dmp

          Filesize

          256KB

        • memory/2440-23-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          Filesize

          4KB

        • memory/2440-15-0x0000000000400000-0x0000000000440000-memory.dmp

          Filesize

          256KB

        • memory/2440-26-0x0000000000400000-0x0000000000440000-memory.dmp

          Filesize

          256KB

        • memory/2440-24-0x0000000000400000-0x0000000000440000-memory.dmp

          Filesize

          256KB

        • memory/2688-14-0x000000001A6E0000-0x000000001A774000-memory.dmp

          Filesize

          592KB

        • memory/2688-13-0x00000000009C0000-0x00000000009D0000-memory.dmp

          Filesize

          64KB

        • memory/2700-1-0x000000007288D000-0x0000000072898000-memory.dmp

          Filesize

          44KB

        • memory/2700-0-0x000000005FFF0000-0x0000000060000000-memory.dmp

          Filesize

          64KB

        • memory/2700-32-0x000000007288D000-0x0000000072898000-memory.dmp

          Filesize

          44KB

        • memory/2700-34-0x000000005FFF0000-0x0000000060000000-memory.dmp

          Filesize

          64KB

        • memory/2700-35-0x000000007288D000-0x0000000072898000-memory.dmp

          Filesize

          44KB