Analysis

  • max time kernel
    101s
  • max time network
    70s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    18/04/2023, 06:19

General

  • Target

    payment 001.xls

  • Size

    207KB

  • MD5

    0dd68e0fc869e2e99c09c4b1bf803cb5

  • SHA1

    f8a4f3904e270404b1fc2d16e96f7c5fd4e7fec4

  • SHA256

    fb99736d2daf1549bef4960a9ce8918fa07edba09957cd596f86e3b79c9d4782

  • SHA512

    eac1c3acbf476e0b28f1cf7ea5741174ef5e567a58867b4f5513ae890c74affde8df611013a98d5561bc725ec31ab2274be0a511bff87e1890752b443270909f

  • SSDEEP

    6144:UZ+RwPONXoRjDhIcp0fDlavx+W26nAdV0o5ad0:bGo

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 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • Accesses Microsoft Outlook profiles 1 TTPs 3 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
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • 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 use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde "C:\Users\Admin\AppData\Local\Temp\payment 001.xls"
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:2024
  • 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:468
    • C:\Users\Public\vbc.exe
      "C:\Users\Public\vbc.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:300
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
        "{path}"
        3⤵
        • Accesses Microsoft Outlook profiles
        • Suspicious use of AdjustPrivilegeToken
        • outlook_office_path
        • outlook_win_path
        PID:1912

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Public\vbc.exe

    Filesize

    687KB

    MD5

    b5bb2601161911af5e73af89d2010875

    SHA1

    d03b42ff4fbedcf4464fe5d0ae63c70cd22b460f

    SHA256

    91b7c84b45a9f74780aed5d551cf59b93e8d2ce469b69227d1cd4d7d90fb6c58

    SHA512

    89841074ac01b1a241d41240d2a25995e57fc6f02e98e98abc3a7246eb300506fe4d91a38ffba13657977481e70ba1babb831bf404b3850676046c8aac152fbe

  • C:\Users\Public\vbc.exe

    Filesize

    687KB

    MD5

    b5bb2601161911af5e73af89d2010875

    SHA1

    d03b42ff4fbedcf4464fe5d0ae63c70cd22b460f

    SHA256

    91b7c84b45a9f74780aed5d551cf59b93e8d2ce469b69227d1cd4d7d90fb6c58

    SHA512

    89841074ac01b1a241d41240d2a25995e57fc6f02e98e98abc3a7246eb300506fe4d91a38ffba13657977481e70ba1babb831bf404b3850676046c8aac152fbe

  • C:\Users\Public\vbc.exe

    Filesize

    687KB

    MD5

    b5bb2601161911af5e73af89d2010875

    SHA1

    d03b42ff4fbedcf4464fe5d0ae63c70cd22b460f

    SHA256

    91b7c84b45a9f74780aed5d551cf59b93e8d2ce469b69227d1cd4d7d90fb6c58

    SHA512

    89841074ac01b1a241d41240d2a25995e57fc6f02e98e98abc3a7246eb300506fe4d91a38ffba13657977481e70ba1babb831bf404b3850676046c8aac152fbe

  • \Users\Public\vbc.exe

    Filesize

    687KB

    MD5

    b5bb2601161911af5e73af89d2010875

    SHA1

    d03b42ff4fbedcf4464fe5d0ae63c70cd22b460f

    SHA256

    91b7c84b45a9f74780aed5d551cf59b93e8d2ce469b69227d1cd4d7d90fb6c58

    SHA512

    89841074ac01b1a241d41240d2a25995e57fc6f02e98e98abc3a7246eb300506fe4d91a38ffba13657977481e70ba1babb831bf404b3850676046c8aac152fbe

  • memory/300-70-0x0000000002080000-0x00000000020B0000-memory.dmp

    Filesize

    192KB

  • memory/300-65-0x0000000000060000-0x0000000000112000-memory.dmp

    Filesize

    712KB

  • memory/300-66-0x0000000004AC0000-0x0000000004B00000-memory.dmp

    Filesize

    256KB

  • memory/300-67-0x00000000006A0000-0x00000000006AC000-memory.dmp

    Filesize

    48KB

  • memory/300-68-0x0000000004AC0000-0x0000000004B00000-memory.dmp

    Filesize

    256KB

  • memory/300-69-0x0000000005480000-0x00000000054FA000-memory.dmp

    Filesize

    488KB

  • memory/1912-73-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/1912-71-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/1912-72-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/1912-74-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/1912-75-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1912-76-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/1912-78-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/1912-80-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/1912-81-0x0000000000C10000-0x0000000000C50000-memory.dmp

    Filesize

    256KB

  • memory/1912-89-0x0000000000C10000-0x0000000000C50000-memory.dmp

    Filesize

    256KB

  • memory/2024-54-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/2024-90-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB