MITRE ATT&CK - Técnica

T1037.004: RC Scripts

RC Scripts (T1037.004) é uma técnica catalogada no MITRE ATT&CK Enterprise usada como referência para mapear comportamento adversário em auditorias de segurança.

Técnica T1037.004 Enterprise ATT&CK

Contexto para AppSec

Em uma auditoria de AppSec, RC Scripts deve ser usada para revisar caminhos em que código, configuração, dependências ou infraestrutura podem viabilizar o comportamento descrito pela MITRE. No ATT&CK, ela aparece em Persistence e Privilege Escalation. As plataformas mapeadas pela MITRE incluem macOS, Linux, Network Devices e ESXi. No Vigly, esse contexto ajuda a conectar evidências do repositório com priorização e remediação.

Tática/fase Persistence, Privilege Escalation
Plataformas MITRE macOS, Linux, Network Devices, ESXi

Descrição oficial original do MITRE ATT&CK

Adversaries may establish persistence by modifying RC scripts, which are executed during a Unix-like system’s startup. These files allow system administrators to map and start custom services at startup for different run levels. RC scripts require root privileges to modify. Adversaries may establish persistence by adding a malicious binary path or shell commands to rc.local, rc.common, and other RC scripts specific to the Unix-like distribution. Upon reboot, the system executes the script's contents as root, resulting in persistence. Adversary abuse of RC scripts is especially effective for lightweight Unix-like distributions using the root user as default, such as ESXi hypervisors, IoT, or embedded systems. As ESXi servers store most system files in memory and therefore discard changes on shutdown, leveraging /etc/rc.local.d/local.sh is one of the few mechanisms for enabling persistence across reboots. Several Unix-like systems have moved to Systemd and deprecated the use of RC scripts. This is now a deprecated mechanism in macOS in favor of Launchd. This technique can be used on Mac OS X Panther v10.3 and earlier versions which still execute the RC scripts. To maintain backwards compatibility some systems, such as Ubuntu, will execute the RC scripts if they exist with the correct file permissions.

Ver fonte oficial no MITRE ATT&CK

Como o Vigly audita a técnica RC Scripts automaticamente na sua pipeline

O Vigly cruza sinais de SAST, modelagem de ameaças, regras de negócio e evidências do repositório para priorizar riscos reais antes que eles cheguem à produção.

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