From VMware vRealize Operations Manager 6.x SLES Security Technical Implementation Guide
Part of SRG-OS-000239-GPOS-00089
Associated with: CCI-001403
Once an attacker establishes initial access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to simply modify an existing account. Auditing of account modification is one method for mitigating this risk.
Determine if execution of the "usermod" and "groupmod" executable are audited. # auditctl -l | egrep '(usermod|groupmod)' | grep perm=x If either "usermod" or "groupmod" are not listed with a permissions filter of at least "x", this is a finding.
Configure execute auditing of the "usermod" and "groupmod" executables run the DoD.script with the following command as "root": # /etc/dodscript.sh OR Configure execute auditing of the "usermod" and "groupmod" executables. Add the following to the audit.rules file: -w /usr/sbin/usermod -p x -k usermod -w /usr/sbin/groupmod -p x -k groupmod Restart the auditd service. # service auditd restart
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