Analysis

  • max time kernel
    120s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240220-en
  • resource tags

    arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
  • submitted
    22-05-2024 01:58

General

  • Target

    22052024_0158_21052024_documentos.xlsx

  • Size

    10KB

  • MD5

    baa10c6f2c1aed5b7d0b663b6155a4c3

  • SHA1

    85ba1a4f78f9811012cddd3421229d795724d594

  • SHA256

    6fdfaa6aa0118f1bc15869c8e51c24fd5e55340fbc8d1cc9183939070ab22652

  • SHA512

    08c35a246865924ef0b792f0a29995d228c4cfb065c8d1a6866f2f939d42a96b6d7b8129222b5b8274065592b4176137c2f9b2f01c5f91e532da4b0b4aad745c

  • SSDEEP

    192:9TZS4VyvSDkM8GAtgB7ol+Au/el0nWZ1X8H3nA/o3NRfUN:9TZHe6kM8Btg5a+ArZ1T/+KN

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    ftp
  • Host:
    ftp://ftp.midhcodistribuciones.com
  • Port:
    21
  • Username:
    [email protected]
  • Password:
    ,A7}+JV4KExQ

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 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Looks up external IP address via web service 1 IoCs

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

  • AutoIT Executable 1 IoCs

    AutoIT scripts compiled to PE executables.

  • 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 2 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 12 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\22052024_0158_21052024_documentos.xlsx
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:3040
  • 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:2580
    • C:\Users\Admin\AppData\Local\Temp\zsrojwqvhiwr.exe
      "C:\Users\Admin\AppData\Local\Temp\zsrojwqvhiwr.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:2540
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
        "C:\Users\Admin\AppData\Local\Temp\zsrojwqvhiwr.exe"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2500

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\zsrojwqvhiwr.exe

    Filesize

    1010KB

    MD5

    6aca95e444494833c0164d66b47e28a4

    SHA1

    2c5e699f50d57ad68bc82ba66eb6dd86a165ca14

    SHA256

    3f8bd0918660411d706e58ec3157a98c10b432989ec2c5978154c026a2b06965

    SHA512

    25af7e93fb4fa8ab277c64faba975b64fa785326f205d121f8aec24890a14114988da9a7a3d40de59246b778f3df6ff6f40202702b679b8edd6bb4251385e330

  • memory/2500-25-0x0000000000400000-0x0000000000442000-memory.dmp

    Filesize

    264KB

  • memory/2500-26-0x0000000000400000-0x0000000000442000-memory.dmp

    Filesize

    264KB

  • memory/2500-24-0x0000000000400000-0x0000000000442000-memory.dmp

    Filesize

    264KB

  • memory/3040-0-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/3040-1-0x00000000722AD000-0x00000000722B8000-memory.dmp

    Filesize

    44KB

  • memory/3040-27-0x00000000722AD000-0x00000000722B8000-memory.dmp

    Filesize

    44KB

  • memory/3040-29-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/3040-30-0x00000000722AD000-0x00000000722B8000-memory.dmp

    Filesize

    44KB