Analysis

  • max time kernel
    120s
  • max time network
    117s
  • platform
    windows10_x64
  • resource
    win10
  • submitted
    07-07-2020 08:23

General

  • Target

    gunzipped.exe

  • Size

    556KB

  • MD5

    605bf3ac2dc392025ee5ad634175c532

  • SHA1

    0b59ca04e25f42f814fa0ec20ceee0ee75b3044c

  • SHA256

    522611d9bc8c8a566e73a6c1126e01da0814748e422fce48805949c152408868

  • SHA512

    c555a860cb99d6ef283bec328b59f43ada20037395479329f61e8efcaec2fb406f719b9db69f45c9fbd8282d7783ee2bcf77db7b5f9566ee148afaf299f4d1f5

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.elittacop.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    @eaSYuc8

Signatures

  • Suspicious use of WriteProcessMemory 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
  • Looks for VMWare Tools registry key 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • AgentTesla

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

  • Maps connected drives based on registry 3 TTPs 2 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

Processes

  • C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
    "C:\Users\Admin\AppData\Local\Temp\gunzipped.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    • Checks BIOS information in registry
    • Looks for VirtualBox Guest Additions in registry
    • Looks for VMWare Tools registry key
    • Suspicious use of SetThreadContext
    • Maps connected drives based on registry
    PID:344
    • C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
      "{path}"
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious behavior: EnumeratesProcesses
      PID:3496

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\gunzipped.exe.log

  • memory/3496-0-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB

  • memory/3496-1-0x0000000000446FCE-mapping.dmp