Kaspersky Threats — Trojan-Dropper.Win32.Agent.bjwtnh

Класс: Trojan-Dropper

Предназначены для скрытой инсталляции на компьютер-жертву вредоносных программ, содержащихся в их теле. Эти вредоносные программы обычно без каких-либо сообщений (или с ложными сообщениями об ошибке в архиве, неверной версии операционной системы и др.) сохраняют на диск жертвы (часто в каталог windows, системный каталог windows, временный каталог и т.д.) другие файлы и запускают их на выполнение. Данные программы хакеры используют: • для скрытой инсталляции троянских программ и/или вирусов; • для защиты от детектирования известных вредоносных программ антивирусами, поскольку не все они в состоянии проверить все компоненты внутри подобных «троянцев».

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Платформа: Win32

Win32 - платформа, управляемая операционной системой на базе Windows NT (Windows XP, Windows 7 и т.д.), позволяющей исполнять 32-битные приложения. В настоящее время данная платформа является одной из наиболее распространенных.

Семейство: Trojan-Dropper.Win32.Agent

Нет описания семейства

Примеры

4B2A2AB0ABDDBDD60CA29115FABBF772

Тактики и Техники: Mitre*

TA0003

Persistence

The adversary is trying to maintain their foothold. Persistence consists of techniques that adversaries use to keep access to systems across restarts, changed credentials, and other interruptions that could cut off their access. Techniques used for persistence include any access, action, or configuration changes that let them maintain their foothold on systems, such as replacing or hijacking legitimate code or adding startup code.

T1547.004

Winlogon Helper DLL

Adversaries may abuse features of Winlogon to execute DLLs and/or executables when a user logs in. Winlogon.exe is a Windows component responsible for actions at logon/logoff as well as the secure attention sequence (SAS) triggered by Ctrl-Alt-Delete. Registry entries in HKLM\Software[\\Wow6432Node\\]\Microsoft\Windows NT\CurrentVersion\Winlogon\ and HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\ are used to manage additional helper programs and functionalities that support Winlogon.

T1548.002

Bypass User Account Control

Adversaries may bypass UAC mechanisms to elevate process privileges on system. Windows User Account Control (UAC) allows a program to elevate its privileges (tracked as integrity levels ranging from low to high) to perform a task under administrator-level permissions, possibly by prompting the user for confirmation. The impact to the user ranges from denying the operation under high enforcement to allowing the user to perform the action if they are in the local administrators group and click through the prompt or allowing them to enter an administrator password to complete the action.

TA0004

Privilege Escalation

The adversary is trying to gain higher-level permissions. Privilege Escalation consists of techniques that adversaries use to gain higher-level permissions on a system or network. Adversaries can often enter and explore a network with unprivileged access but require elevated permissions to follow through on their objectives. Common approaches are to take advantage of system weaknesses, misconfigurations, and vulnerabilities. Examples of elevated access include: SYSTEM/root level, local administrator, user account with admin-like access, user accounts with access to specific system or perform specific function. These techniques often overlap with Persistence techniques, as OS features that let an adversary persist can execute in an elevated context.

T1547.004

Winlogon Helper DLL

T1548.002

Bypass User Account Control

TA0005

Defense Evasion

The adversary is trying to avoid being detected. Defense Evasion consists of techniques that adversaries use to avoid detection throughout their compromise. Techniques used for defense evasion include uninstalling/disabling security software or obfuscating/encrypting data and scripts. Adversaries also leverage and abuse trusted processes to hide and masquerade their malware. Other tactics' techniques are cross-listed here when those techniques include the added benefit of subverting defenses.

T1548.002

Bypass User Account Control

T1562.001

Disable or Modify Tools

Adversaries may modify and/or disable security tools to avoid possible detection of their malware/tools and activities. This may take many forms, such as killing security software processes or services, modifying / deleting Registry keys or configuration files so that tools do not operate properly, or other methods to interfere with security tools scanning or reporting information. Adversaries may also disable updates to prevent the latest security patches from reaching tools on victim systems.