Analysis

  • max time kernel
    118s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    02/05/2024, 09:37

General

  • Target
    shelovedsomeonetounderstandthebeautifulgirlpleasetrytogetherbackfromthebeautifulgirlsheisverybeautif.rtf
  • Size 78KB
  • Sample240502-llf3raeb4x
  • SHA256 01a6c09c9829bdea8ed5dec785ce2118b60bba4a84f23c904c5d54392bee4fe5
  • MD5 SHA1 SHA512 SSDEEP

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
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

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

  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 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.

  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Office loads VBA resources, possible macro or embedded object present
  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • 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 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 32 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\shelovedsomeonetounderstandthebeautifulgirlpleasetrytogetherbackfromthebeautifulgirlsheisverybeautif.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:2352
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:2472
    • 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:3040
      • C:\Users\Admin\AppData\Roaming\HJJC.exe
        "C:\Users\Admin\AppData\Roaming\HJJC.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2652
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\HJJC.exe"
          3⤵
          • Command and Scripting Interpreter: PowerShell
          • Drops file in System32 directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:636
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\BPRNYujHfkzq.exe"
          3⤵
          • Command and Scripting Interpreter: PowerShell
          • Drops file in System32 directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2996
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\BPRNYujHfkzq" /XML "C:\Users\Admin\AppData\Local\Temp\tmp41C1.tmp"
          3⤵
          • Creates scheduled task(s)
          PID:1976
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2812

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          tmp41C1.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\tmp41C1.tmp
          • Size 1KB
          • SHA256 cc7d7fc984aaea605f8c9bfa5939242064bb33e58b5ccac639dd3cfb98eaed34
          • MD5 SHA1 SHA512

          HJJC.exe

          • Path C:\Users\Admin\AppData\Roaming\HJJC.exe
          • Size 679KB
          • SHA256 ca0bf7bb5880f8af7bfc35f0dba6fde5c68dd7212f02ed4f70260004e4effc98
          • MD5 SHA1 SHA512 SSDEEP

          AZVLBXYSWH1HQA1G4JFM.temp

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\AZVLBXYSWH1HQA1G4JFM.temp
          • Size 7KB
          • SHA256 289010587c797c6243eb94e778cfa7a69292431c3f504da6e2330fa57580216d
          • MD5 SHA1 SHA512 SSDEEP

          memory/2352-1-0x000000005FFF0000-0x0000000060000000-memory.dmp

          memory/2352-2-0x0000000070F0D000-0x0000000070F18000-memory.dmp

          memory/2352-0-0x000000002F9B1000-0x000000002F9B2000-memory.dmp

          memory/2352-49-0x0000000070F0D000-0x0000000070F18000-memory.dmp

          memory/2652-16-0x0000000000930000-0x00000000009E0000-memory.dmp

          memory/2652-24-0x0000000005290000-0x0000000005312000-memory.dmp

          memory/2652-23-0x0000000000580000-0x0000000000596000-memory.dmp

          memory/2652-21-0x00000000003A0000-0x00000000003B6000-memory.dmp

          memory/2812-37-0x0000000000400000-0x0000000000442000-memory.dmp

          memory/2812-39-0x0000000000400000-0x0000000000442000-memory.dmp

          memory/2812-46-0x0000000000400000-0x0000000000442000-memory.dmp

          memory/2812-47-0x0000000000400000-0x0000000000442000-memory.dmp

          memory/2812-45-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          memory/2812-48-0x0000000000400000-0x0000000000442000-memory.dmp

          memory/2812-43-0x0000000000400000-0x0000000000442000-memory.dmp

          memory/2812-41-0x0000000000400000-0x0000000000442000-memory.dmp