Analysis

  • max time kernel
    121s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    12/01/2024, 13:45

General

  • Target
    PO6567800079900.rtf
  • Size 147KB
  • Sample240112-q2dpsahahj
  • SHA256 851468fddedf53fe23dfc8cbc568741692e8a6f0677069f1d07a3a0d185e08a2
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Credentials
  • Protocol

    smtp

  • Host

    smtp.yandex.com

  • Port

    587

  • Password

    iffyyparvldocxga

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 2 IoCs
  • Loads dropped DLL 1 IoCs
  • 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.

  • 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
  • Drops file in Windows directory 1 IoCs
  • Office loads VBA resources, possible macro or embedded object present
  • 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 SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\PO6567800079900.rtf"
    1⤵
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1112
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:2916
    • 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:2792
      • C:\Users\Admin\AppData\Roaming\plug47339.exe
        "C:\Users\Admin\AppData\Roaming\plug47339.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2744
        • C:\Users\Admin\AppData\Roaming\plug47339.exe
          "C:\Users\Admin\AppData\Roaming\plug47339.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:936

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          Normal.dotm

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\Templates\Normal.dotm
          • Size 20KB
          • SHA256 ab2822bc22651f78539fd5bbd855ca16d8e3fc85fbf5c9b28077261e31b35df7
          • MD5 SHA1 SHA512 SSDEEP

          plug47339.exe

          • Path \Users\Admin\AppData\Roaming\plug47339.exe
          • Size 686KB
          • SHA256 1c6d1ba8637609ef14bb12400b0f2a705d27f71907603349385a63327345e8fa
          • MD5 SHA1 SHA512 SSDEEP

          memory/936-42-0x0000000000400000-0x0000000000442000-memory.dmp

          memory/936-44-0x0000000004BF0000-0x0000000004C30000-memory.dmp

          memory/936-34-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          memory/936-45-0x000000006AF00000-0x000000006B5EE000-memory.dmp

          memory/936-36-0x0000000000400000-0x0000000000442000-memory.dmp

          memory/936-43-0x000000006AF00000-0x000000006B5EE000-memory.dmp

          memory/936-39-0x0000000000400000-0x0000000000442000-memory.dmp

          memory/936-32-0x0000000000400000-0x0000000000442000-memory.dmp

          memory/936-46-0x0000000004BF0000-0x0000000004C30000-memory.dmp

          memory/936-27-0x0000000000400000-0x0000000000442000-memory.dmp

          memory/936-29-0x0000000000400000-0x0000000000442000-memory.dmp

          memory/936-31-0x0000000000400000-0x0000000000442000-memory.dmp

          memory/1112-67-0x000000005FFF0000-0x0000000060000000-memory.dmp

          memory/1112-23-0x0000000070D4D000-0x0000000070D58000-memory.dmp

          memory/1112-0-0x000000002F381000-0x000000002F382000-memory.dmp

          memory/1112-2-0x0000000070D4D000-0x0000000070D58000-memory.dmp

          memory/1112-1-0x000000005FFF0000-0x0000000060000000-memory.dmp

          memory/1112-68-0x0000000070D4D000-0x0000000070D58000-memory.dmp

          memory/2744-26-0x0000000004D50000-0x0000000004DCC000-memory.dmp

          memory/2744-25-0x00000000003E0000-0x00000000003EE000-memory.dmp

          memory/2744-17-0x0000000004DD0000-0x0000000004E10000-memory.dmp

          memory/2744-41-0x000000006AF00000-0x000000006B5EE000-memory.dmp

          memory/2744-16-0x000000006AF00000-0x000000006B5EE000-memory.dmp

          memory/2744-15-0x0000000001080000-0x0000000001132000-memory.dmp

          memory/2744-22-0x0000000000220000-0x0000000000232000-memory.dmp