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Analysis

  • max time kernel
    118s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    05/06/2024, 01:05

General

  • Target

    b9be32df7c17dd87021dc2ebb56b1c4ea4b453e3e0d7072dfa572e416cb161a2.rtf

  • Size

    37KB

  • MD5

    c5858e4c690557b5240597db6e4d88c9

  • SHA1

    055c0f300481f028f283c2c822af1746469c2676

  • SHA256

    b9be32df7c17dd87021dc2ebb56b1c4ea4b453e3e0d7072dfa572e416cb161a2

  • SHA512

    fbc7abc3c991d7d49c663aa8f8eae1ce47e4d703f55267dbbb2d1601b9d0d265feb96c78b92b6e6c29b519a2b5f12576924be5050faa94eb56f0fac2304d80b0

  • SSDEEP

    768:UZvvWq23Q5agCiK//6JyzUmyThHcdXtpSu:AvVrLK//OyLy5itH

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 2 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.

  • 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\b9be32df7c17dd87021dc2ebb56b1c4ea4b453e3e0d7072dfa572e416cb161a2.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:2056
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1516
    • 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:1616
      • C:\Users\Admin\AppData\Roaming\igcc.exe
        "C:\Users\Admin\AppData\Roaming\igcc.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2752
        • C:\Users\Admin\AppData\Roaming\igcc.exe
          "C:\Users\Admin\AppData\Roaming\igcc.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2248

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      20KB

      MD5

      45ac82dcc767b08e64c4143c42d051d0

      SHA1

      1eb9ef26532565c7cc5ffb80b9137208260398cd

      SHA256

      ccc450c59c511f7dc1933f104df97476ed87a1f0fc4fea616999c789ff133958

      SHA512

      2d87498d0b9b4bc6882b038be5d6056909487d19a82137f9e80b29e6973b4212b1af51b525895957e48c61ec38a0012c07c6597a395f239e197679f21ca02a7b

    • \Users\Admin\AppData\Roaming\igcc.exe

      Filesize

      946KB

      MD5

      2e1fea17aeea8852800f17ead782ca53

      SHA1

      34a1bc065cd9413b783ad9e0e78d2996415186a4

      SHA256

      d2f23dc9b7b97472f7996e14c836b6571e23c79ee585d6d4c8f13ef7ae101d6e

      SHA512

      93f8af036ac8f9be2a63e0717499f96d5c8f5ce5dc0a1c1e3ac4a09dee33c305aa602d93007a8b97e15d2b637fbbe819fb53b631d37b1123caa9e5f8622e9e83

    • memory/2056-0-0x000000002F5C1000-0x000000002F5C2000-memory.dmp

      Filesize

      4KB

    • memory/2056-1-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB

    • memory/2056-2-0x00000000718CD000-0x00000000718D8000-memory.dmp

      Filesize

      44KB

    • memory/2056-61-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB

    • memory/2056-43-0x00000000718CD000-0x00000000718D8000-memory.dmp

      Filesize

      44KB

    • memory/2248-36-0x0000000000400000-0x0000000000440000-memory.dmp

      Filesize

      256KB

    • memory/2248-38-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/2248-32-0x0000000000400000-0x0000000000440000-memory.dmp

      Filesize

      256KB

    • memory/2248-31-0x0000000000400000-0x0000000000440000-memory.dmp

      Filesize

      256KB

    • memory/2248-42-0x0000000000400000-0x0000000000440000-memory.dmp

      Filesize

      256KB

    • memory/2248-41-0x0000000000400000-0x0000000000440000-memory.dmp

      Filesize

      256KB

    • memory/2248-39-0x0000000000400000-0x0000000000440000-memory.dmp

      Filesize

      256KB

    • memory/2248-34-0x0000000000400000-0x0000000000440000-memory.dmp

      Filesize

      256KB

    • memory/2752-27-0x0000000000530000-0x000000000053E000-memory.dmp

      Filesize

      56KB

    • memory/2752-28-0x0000000000550000-0x0000000000560000-memory.dmp

      Filesize

      64KB

    • memory/2752-29-0x0000000005620000-0x00000000056A2000-memory.dmp

      Filesize

      520KB

    • memory/2752-25-0x00000000003C0000-0x00000000003D6000-memory.dmp

      Filesize

      88KB

    • memory/2752-24-0x0000000005430000-0x00000000054CE000-memory.dmp

      Filesize

      632KB

    • memory/2752-18-0x0000000000D60000-0x0000000000E52000-memory.dmp

      Filesize

      968KB