Analysis

  • max time kernel
    141s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    22-05-2024 14:00

General

  • Target

    detalle_transferencia_2024-05-13T064143.173 0200_3049280002017526_PDF.exe

  • Size

    557KB

  • MD5

    a9c5337e7c384d5156d58d5b8ec7effa

  • SHA1

    34b32c66b09fa6b02c94dae25a6df9f2ea2ba6ef

  • SHA256

    c2865edc8458f593826eb983978f6256230e74610d4947506de9fbce5061cf2a

  • SHA512

    310e347a4791f86228b18d2e696f78fd395df1405bc131b5bd4f8d901489054deb8cb8c2bf732126eccc0fd2e3e06b550408e9e466be422e6e06782bfd5f8b14

  • SSDEEP

    6144:IcBvWsKG0/FpgG+cSjnXDrEGTKqXyqX6Xu7klJyk6XwG+435lRvWtRSNQABuX+rl:xKEGzSjDwI6XDc+Y+trf+rl

Malware Config

Extracted

Family

agenttesla

Credentials

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • Loads dropped DLL 1 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.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 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 NtCreateThreadExHideFromDebugger 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\detalle_transferencia_2024-05-13T064143.173 0200_3049280002017526_PDF.exe
    "C:\Users\Admin\AppData\Local\Temp\detalle_transferencia_2024-05-13T064143.173 0200_3049280002017526_PDF.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:3000
    • C:\Users\Admin\AppData\Local\Temp\detalle_transferencia_2024-05-13T064143.173 0200_3049280002017526_PDF.exe
      "C:\Users\Admin\AppData\Local\Temp\detalle_transferencia_2024-05-13T064143.173 0200_3049280002017526_PDF.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious use of NtCreateThreadExHideFromDebugger
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:2628

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • \Users\Admin\AppData\Local\Temp\nsy23C8.tmp\System.dll

    Filesize

    12KB

    MD5

    12b140583e3273ee1f65016becea58c4

    SHA1

    92df24d11797fefd2e1f8d29be9dfd67c56c1ada

    SHA256

    014f1dfeb842cf7265a3644bc6903c592abe9049bfc7396829172d3d72c4d042

    SHA512

    49ffdfa1941361430b6acb3555fd3aa05e4120f28cbdf7ceaa2af5937d0b8cccd84471cf63f06f97cf203b4aa20f226bdad082e9421b8e6b62ab6e1e9fc1e68a

  • memory/2628-15-0x00000000772C0000-0x0000000077469000-memory.dmp

    Filesize

    1.7MB

  • memory/2628-37-0x0000000000460000-0x00000000014C2000-memory.dmp

    Filesize

    16.4MB

  • memory/2628-39-0x0000000000460000-0x00000000004A2000-memory.dmp

    Filesize

    264KB

  • memory/3000-13-0x00000000772C1000-0x00000000773C2000-memory.dmp

    Filesize

    1.0MB

  • memory/3000-14-0x00000000772C0000-0x0000000077469000-memory.dmp

    Filesize

    1.7MB