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Home/ATT&CK/T1135
MITRE ATT&CK Technique

T1135: Network Share Discovery

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Adversaries may look for folders and drives shared on remote systems as a means of identifying sources of information to gather as a precursor for Collection and to identify potential systems of interest for Lateral Movement. Networks often contain shared network drives and folders that enable users to access file directories on various systems across a network. File sharing over a Windows network occurs over the SMB protocol. (Citation: Wikipedia Shared Resource) (Citation: TechNet Shared Folder) [Net](https://attack.mitre.org/software/S0039) can be used to query a remote system for available shared drives using the <code>net view \\\\remotesystem</code> command. It can also be used to query shared drives on the local system using <code>net share</code>. For macOS, the <code>sharing -l</code> command lists all shared points used for smb services.

Tactics
Discovery
Platforms
Linux, macOS, Windows

▪Mitigations (1)

M1028Operating System Configuration

Operating System Configuration involves adjusting system settings and hardening the default configurations of an operating system (OS) to mitigate adversary exploitation and prevent abuse of system functionality. Proper OS configurations address security vulnerabilities, limit attack surfaces, and ensure robust defense against a wide range of techniques. This mitigation can be implemented through the following measures: Disable Unused Features: - Turn off SMBv1, LLMNR, and NetBIOS where not needed. - Disable remote registry and unnecessary services. Enforce OS-level Protections: - Enable Data Execution Prevention (DEP), Address Space Layout Randomization (ASLR), and Control Flow Guard (CFG) on Windows. - Use AppArmor or SELinux on Linux for mandatory access controls. Secure Access Settings: - Enable User Account Control (UAC) for Windows. - Restrict root/sudo access on Linux/macOS and enforce strong permissions using sudoers files. File System Hardening: - Implement least-privilege access for critical files and system directories. - Audit permissions regularly using tools like icacls (Windows) or getfacl/chmod (Linux/macOS). Secure Remote Access: - Restrict RDP, SSH, and VNC to authorized IPs using firewall rules. - Enable NLA for RDP and enforce strong password/lockout policies. Harden Boot Configurations: - Enable Secure Boot and enforce UEFI/BIOS password protection. - Use BitLocker or LUKS to encrypt boot drives. Regular Audits: - Periodically audit OS configurations using tools like CIS Benchmarks or SCAP tools. *Tools for Implementation* Windows: - Microsoft Group Policy Objects (GPO): Centrally enforce OS security settings. - Windows Defender Exploit Guard: Built-in OS protection against exploits. - CIS-CAT Pro: Audit Windows security configurations based on CIS Benchmarks. Linux/macOS: - AppArmor/SELinux: Enforce mandatory access controls. - Lynis: Perform comprehensive security audits. - SCAP Security Guide: Automate configuration hardening using Security Content Automation Protocol. Cross-Platform: - Ansible or Chef/Puppet: Automate configuration hardening at scale. - OpenSCAP: Perform compliance and configuration checks.

▪Used by groups (16)

G0006APT1G0035DragonflyG0050APT32

▪Software using this technique (59)

S0013PlugXmalwareS0039Nettool

▪Reference

T1135 on MITRE ATT&CK
G0054Sowbug
G0081Tropic Trooper
G0082APT38
G0087APT39
G0096APT41
G0102Wizard Spider
G0105DarkVishnya
G0114Chimera
G0131Tonto Team
G1016FIN13
G1032INC Ransom
G1043BlackByte
G1051Medusa Group
S0154Cobalt Strikemalware
S0165OSInfomalware
S0192Pupytool
S0233MURKYTOPmalware
S0236Kwampirsmalware
S0250Koadictool
S0251Zebrocymalware
S0260InvisiMolemalware
S0266TrickBotmalware
S0363Empiretool
S0365Olympic Destroyermalware
S0367Emotetmalware
S0444ShimRatmalware
S0458Ramsaymalware
S0483IcedIDmalware
S0488CrackMapExectool
S0534Bazarmalware
S0570BitPaymermalware
S0575Contimalware
S0603Stuxnetmalware
S0606Bad Rabbitmalware
S0611Clopmalware
S0612WastedLockermalware
S0616DEATHRANSOMmalware
S0617HELLOKITTYmalware
S0618FIVEHANDSmalware
S0625Cubamalware
S0638Babukmalware
S0640Avaddonmalware
S0650QakBotmalware
S0659Diavolmalware
S0660Clamblingmalware
S0686QuietSievemalware
S0689WhisperGatemalware
S0692SILENTTRINITYtool
S0696Flagpromalware
S1053AvosLockermalware
S1068BlackCatmalware
S1073Royalmalware
S1075KOPILUWAKmalware
S1081BADHATCHmalware
S1085Sardonicmalware
S1129Akiramalware
S1139INC Ransomwaremalware
S1141LunarWebmalware
S1159DUSTTRAPmalware
S1160Latrodectusmalware
S1180BlackByte Ransomwaremalware
S1181BlackByte 2.0 Ransomwaremalware
S1199LockBit 2.0malware
S1202LockBit 3.0malware
S1212RansomHubmalware
S1242Qilinmalware
S1244Medusa Ransomwaremalware
S1247Embargomalware
S9045BACKUPOSINT v9.0 APEX PREDATORmalware
S9051The Gentlemen Ransomwaremalware

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