Analysis

  • max time kernel
    122s
  • max time network
    129s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    08/03/2024, 01:50

General

  • Target

    19a775bd69ce741a815e6f67b3b78d04fad87a296ed2515e88b1ad3fc5a74aae.rtf

  • Size

    66KB

  • MD5

    263e05601d520fc6dddae63a2346eca6

  • SHA1

    55f96d85611d46d948370b68dd300b0fc9042f2b

  • SHA256

    19a775bd69ce741a815e6f67b3b78d04fad87a296ed2515e88b1ad3fc5a74aae

  • SHA512

    be39fcd50974e85953ffdb1949dfa48c4210cc21877bdf88037da220ee6111231210e5c95508c5e019aecdae5e793bd8980089cf3f07925fd80b8fec204218e0

  • SSDEEP

    1536:Ly6MbbaxUMCQrO1u/gBGW+CBkXZ866D4ek9XSaJMLcv:LyF1u/gBSXZ866tkXSa6Lcv

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 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads WinSCP keys stored on the system 2 TTPs

    Tries to access WinSCP stored sessions.

  • 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 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\19a775bd69ce741a815e6f67b3b78d04fad87a296ed2515e88b1ad3fc5a74aae.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:2092
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1636
    • 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:2928
      • C:\Users\Admin\AppData\Roaming\cnn.exe
        "C:\Users\Admin\AppData\Roaming\cnn.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2528
        • C:\Users\Admin\AppData\Roaming\cnn.exe
          "C:\Users\Admin\AppData\Roaming\cnn.exe"
          3⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2424

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Roaming\Microsoft\Templates\Normal.dotm

      Filesize

      20KB

      MD5

      d6f5ab3373ed0e2f9aa7d34b920783b8

      SHA1

      4b92ca5ba6a0fadefe1ca163b5120078c489c29e

      SHA256

      09a007b9dfb561febea9a3a1465925f384aab4b527b6c40c11ed15f7c61d0de7

      SHA512

      6195cbcfedc7cc6fb367b132ae9a5e67058734485a4aaa7deba6bdf0b13dce0ced6382160e721fa465e8aa9fc68564e0ce0b0bb7c72570d69de7d3d04cdfebb7

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

      Filesize

      396KB

      MD5

      80dd301bf2859dc7451fbb85287a66a9

      SHA1

      90ab0f2c20949b7063a424cb1fa912f7c626ff8f

      SHA256

      cfb841fa2ffa56271126a33ff5b966379c509fdf3a793391ab48fdb5120136f4

      SHA512

      bc2ab53a3eb30124d8cee775f1c24db7212b7b5504d77e07a83f01b6440cb38c343361f0a3f5e76555dbf10589cd91110c508fc56f8696d6d752e32708922af8

    • memory/2092-0-0x000000002F721000-0x000000002F722000-memory.dmp

      Filesize

      4KB

    • memory/2092-1-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB

    • memory/2092-2-0x0000000070FDD000-0x0000000070FE8000-memory.dmp

      Filesize

      44KB

    • memory/2092-64-0x0000000070FDD000-0x0000000070FE8000-memory.dmp

      Filesize

      44KB

    • memory/2092-63-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB

    • memory/2092-41-0x0000000070FDD000-0x0000000070FE8000-memory.dmp

      Filesize

      44KB

    • memory/2424-40-0x00000000006D0000-0x0000000000710000-memory.dmp

      Filesize

      256KB

    • memory/2424-45-0x00000000006D0000-0x0000000000710000-memory.dmp

      Filesize

      256KB

    • memory/2424-22-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/2424-24-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/2424-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/2424-32-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/2424-35-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/2424-37-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/2424-39-0x000000006B0C0000-0x000000006B7AE000-memory.dmp

      Filesize

      6.9MB

    • memory/2424-44-0x000000006B0C0000-0x000000006B7AE000-memory.dmp

      Filesize

      6.9MB

    • memory/2424-20-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/2424-19-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/2528-38-0x000000006B0C0000-0x000000006B7AE000-memory.dmp

      Filesize

      6.9MB

    • memory/2528-21-0x0000000000230000-0x0000000000231000-memory.dmp

      Filesize

      4KB

    • memory/2528-18-0x0000000004AB0000-0x0000000004AF0000-memory.dmp

      Filesize

      256KB

    • memory/2528-17-0x000000006B0C0000-0x000000006B7AE000-memory.dmp

      Filesize

      6.9MB

    • memory/2528-16-0x0000000000240000-0x00000000002A8000-memory.dmp

      Filesize

      416KB