Analysis

  • max time kernel
    236s
  • max time network
    254s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    24/11/2022, 08:57

General

  • Target

    Dispatch Intimation.xls

  • Size

    637KB

  • MD5

    307fee76a6790b07f15db9f78204d0a7

  • SHA1

    f6876b7d784f9ccebbb4f69b0142d0e35204a0e9

  • SHA256

    afa915e7174b5c3da177ea2bc6573248a00d173dfe8f2ff8e7667557a3bf699f

  • SHA512

    e12841670867e9e11f726cc93029753a68c4422c5503668911a6d59f8da1822b1acbc7c89f886ebc5bf7fae0c65477ee000eafd0cbaee39578ac30d0cdd6f655

  • SSDEEP

    6144:ovzZ+RwPONXoRjDhIcp0fDlavx+W26nADOiYsPKcKFnv+YN/dwVIqa0M5h92XYkN:ovYpMVWc3qBYVySR4SXX

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    host39.registrar-servers.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    oluchukwu554

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
  • 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 behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 16 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\Dispatch Intimation.xls"
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:468
  • 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:1840
    • C:\Users\Public\vbc.exe
      "C:\Users\Public\vbc.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1128
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
        "{path}"
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1764

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Public\vbc.exe

    Filesize

    639KB

    MD5

    6c53fc85e9ac65ba222d564a1bc31922

    SHA1

    c7bc5547c850c8c21079a802e9058f9fd1b83a56

    SHA256

    3a9f3bff649e255673885bffc1808ad8a5400592407e41404ced1743b8763ee4

    SHA512

    645876094f05af1f91bb3107188c1abf41c50f451e2fc81dec4368ff1f5f11f7e168a53ffa43bb927f84567953d1c16623b503f52457b278ca21ec2eacbaebf8

  • C:\Users\Public\vbc.exe

    Filesize

    639KB

    MD5

    6c53fc85e9ac65ba222d564a1bc31922

    SHA1

    c7bc5547c850c8c21079a802e9058f9fd1b83a56

    SHA256

    3a9f3bff649e255673885bffc1808ad8a5400592407e41404ced1743b8763ee4

    SHA512

    645876094f05af1f91bb3107188c1abf41c50f451e2fc81dec4368ff1f5f11f7e168a53ffa43bb927f84567953d1c16623b503f52457b278ca21ec2eacbaebf8

  • \Users\Public\vbc.exe

    Filesize

    639KB

    MD5

    6c53fc85e9ac65ba222d564a1bc31922

    SHA1

    c7bc5547c850c8c21079a802e9058f9fd1b83a56

    SHA256

    3a9f3bff649e255673885bffc1808ad8a5400592407e41404ced1743b8763ee4

    SHA512

    645876094f05af1f91bb3107188c1abf41c50f451e2fc81dec4368ff1f5f11f7e168a53ffa43bb927f84567953d1c16623b503f52457b278ca21ec2eacbaebf8

  • memory/468-55-0x0000000071611000-0x0000000071613000-memory.dmp

    Filesize

    8KB

  • memory/468-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/468-57-0x00000000725FD000-0x0000000072608000-memory.dmp

    Filesize

    44KB

  • memory/468-58-0x0000000076391000-0x0000000076393000-memory.dmp

    Filesize

    8KB

  • memory/468-60-0x00000000725FD000-0x0000000072608000-memory.dmp

    Filesize

    44KB

  • memory/468-54-0x000000002F961000-0x000000002F964000-memory.dmp

    Filesize

    12KB

  • memory/1128-65-0x0000000000B60000-0x0000000000C06000-memory.dmp

    Filesize

    664KB

  • memory/1128-67-0x0000000000300000-0x0000000000312000-memory.dmp

    Filesize

    72KB

  • memory/1128-68-0x0000000005230000-0x00000000052B4000-memory.dmp

    Filesize

    528KB

  • memory/1128-69-0x0000000000B10000-0x0000000000B4C000-memory.dmp

    Filesize

    240KB

  • memory/1764-70-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/1764-71-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/1764-73-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/1764-74-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/1764-75-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/1764-80-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/1764-78-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB