Analysis

  • max time kernel
    117s
  • max time network
    118s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    01-10-2024 06:04

General

  • Target

    Fatura 001.xlsx

  • Size

    1.9MB

  • MD5

    9273a696f6ef57cdda7670f5b8742a1a

  • SHA1

    68b3f8d1448d31d42f0efdb59313ee031bba0c7c

  • SHA256

    df4c4ff517e33b8a2cec86619652fa6cdb4ed7acd120a7e8866b673cb554b974

  • SHA512

    407ed0402d1940b5d7dfceb0bf45bf05814f54b091b1cfbc918bdf715b91a97e949bbad176bef553820a40885e9382633d5853ce2e31f130d74b3d6f470b2110

  • SSDEEP

    49152:c2Hqv0ubGHrUFG9Etdc+BEJiAOtSigHUZRsT:H3+GHrUA9Enc+CpUZRsT

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 2 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • AutoIT Executable 1 IoCs

    AutoIT scripts compiled to PE executables.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • 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.

  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 12 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\Fatura 001.xlsx"
    1⤵
    • System Location Discovery: System Language Discovery
    • Enumerates system info in registry
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:3064
  • 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
    • System Location Discovery: System Language Discovery
    • Launches Equation Editor
    • Suspicious use of WriteProcessMemory
    PID:2316
    • C:\Users\Admin\AppData\Local\Temp\winterz.exe
      C:\Users\Admin\AppData\Local\Temp\winterz.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:2868
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
        C:\Users\Admin\AppData\Local\Temp\winterz.exe
        3⤵
        • Accesses Microsoft Outlook profiles
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • outlook_office_path
        • outlook_win_path
        PID:2660

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • \Users\Admin\AppData\Local\Temp\winterz.exe

    Filesize

    1.1MB

    MD5

    0fcfeefef9e389286b0ef7e97e1e7f28

    SHA1

    85986dadc140d6d719b844e6f38d775dfad211d5

    SHA256

    c186def00d97aabdf95cf1bbd2605ef8ffc8a05e13fff501b0117ae7395d4487

    SHA512

    e64a173aef6f91d03ba26762ee176b32e50e9344d1cf473dbdd22949c067a0e4b9354f7ecfc742afa6fc53ed67809e1dd7b599f8fbe596dc797d616063e7ed19

  • memory/2660-25-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/2660-24-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/2660-23-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/3064-0-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/3064-1-0x0000000071FCD000-0x0000000071FD8000-memory.dmp

    Filesize

    44KB

  • memory/3064-26-0x0000000071FCD000-0x0000000071FD8000-memory.dmp

    Filesize

    44KB