Analysis

  • max time kernel
    118s
  • max time network
    143s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    21/02/2024, 13:09

General

  • Target
    New order.rtf
  • Size 190KB
  • Sample240221-qdr79sgc75
  • SHA256 adbe65c8b7499ffb421e092b9842fd7fc4195054ed184fde05a947748c9e7c2c
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Credentials
  • Protocol

    smtp

  • Host

    mail.processengrg.com

  • Port

    587

  • Password

    Bigbrain2022#

Extracted

Family
  • agenttesla

Credentials

Signatures

  • AgentTesla

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

  • Blocklisted process makes network request 2 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.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 3 IoCs

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

  • Drops file in System32 directory 1 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
  • 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
  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 21 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\New order.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:1792
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:2248
    • 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:1960
      • C:\Users\Admin\AppData\Roaming\peter63005.exe
        "C:\Users\Admin\AppData\Roaming\peter63005.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2816
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\peter63005.exe"
          3⤵
          • Drops file in System32 directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:796
        • C:\Users\Admin\AppData\Roaming\peter63005.exe
          "C:\Users\Admin\AppData\Roaming\peter63005.exe"
          3⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:620

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 6b6bd804660d51debb6037f8d543d6374c0021ee2a968f6ae71ad8f2f21416c0
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 8fe3bf62e07823496c6977ef07da5a05fa98070d1abe69a389776c106ed9087c
          • MD5 SHA1 SHA512

          Cab69DA.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\Cab69DA.tmp
          • Size 65KB
          • SHA256 c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
          • MD5 SHA1 SHA512 SSDEEP

          Tar69ED.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\Tar69ED.tmp
          • Size 171KB
          • SHA256 4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f
          • MD5 SHA1 SHA512 SSDEEP

          Normal.dotm

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\Templates\Normal.dotm
          • Size 20KB
          • SHA256 3126806221f328b98454428df2e23a3d7f47061c838be92e4c3fbe1154884046
          • MD5 SHA1 SHA512 SSDEEP

          peter63005.exe

          • Path \Users\Admin\AppData\Roaming\peter63005.exe
          • Size 709KB
          • SHA256 9ff976407a98d5145517f49659ac33ce35cb6d85540aa89a8ee0712cbaada900
          • MD5 SHA1 SHA512 SSDEEP

          memory/620-48-0x0000000000400000-0x0000000000442000-memory.dmp

          memory/620-46-0x0000000000400000-0x0000000000442000-memory.dmp

          memory/620-62-0x000000006B980000-0x000000006C06E000-memory.dmp

          memory/620-59-0x0000000004830000-0x0000000004870000-memory.dmp

          memory/620-55-0x0000000000400000-0x0000000000442000-memory.dmp

          memory/620-42-0x0000000000400000-0x0000000000442000-memory.dmp

          memory/620-44-0x0000000000400000-0x0000000000442000-memory.dmp

          memory/620-50-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          memory/620-52-0x0000000000400000-0x0000000000442000-memory.dmp

          memory/620-57-0x0000000000400000-0x0000000000442000-memory.dmp

          memory/620-132-0x000000006B980000-0x000000006C06E000-memory.dmp

          memory/796-63-0x00000000668E0000-0x0000000066E8B000-memory.dmp

          memory/796-66-0x00000000028C0000-0x0000000002900000-memory.dmp

          memory/796-64-0x00000000668E0000-0x0000000066E8B000-memory.dmp

          memory/796-67-0x00000000028C0000-0x0000000002900000-memory.dmp

          memory/796-68-0x00000000668E0000-0x0000000066E8B000-memory.dmp

          memory/1792-65-0x000000007180D000-0x0000000071818000-memory.dmp

          memory/1792-0-0x000000002FAA1000-0x000000002FAA2000-memory.dmp

          memory/1792-2-0x000000007180D000-0x0000000071818000-memory.dmp

          memory/1792-1-0x000000005FFF0000-0x0000000060000000-memory.dmp

          memory/1792-153-0x000000005FFF0000-0x0000000060000000-memory.dmp

          memory/2816-58-0x000000006B980000-0x000000006C06E000-memory.dmp

          memory/2816-41-0x0000000005370000-0x00000000053F4000-memory.dmp

          memory/2816-40-0x00000000004B0000-0x00000000004C2000-memory.dmp

          memory/2816-39-0x0000000000460000-0x000000000046E000-memory.dmp

          memory/2816-37-0x0000000000430000-0x0000000000450000-memory.dmp

          memory/2816-32-0x0000000004E60000-0x0000000004EA0000-memory.dmp

          memory/2816-31-0x000000006B980000-0x000000006C06E000-memory.dmp

          memory/2816-30-0x0000000000C70000-0x0000000000D28000-memory.dmp