Exploitation of Remote Services T1210
Adversaries may exploit remote services to gain unauthorized access to internal systems once inside of a network. Exploitation of a software vulnerability occurs when an adversary takes advantage of a programming error in a program, service, or within the operating system software or kernel itself to execute adversary-controlled code. A common goal for post-compromise exploitation of remote services is for lateral movement to enable access to a remote system.
Events covered
28 catalog events are tagged with this technique by at least one rule.
Authoring guide
Patterns shared across the 27 rules above: which fields they filter on, what specific values they look for, and what they exclude. The catalog normalizes field names across vendors so Sigma's Image, Elastic's process.name, and Splunk's process_name collapse into one row. Each rule contributes at most once per row.
Fields filtered most (31 distinct)
The fields most rules look at when detecting this technique. The How column shows the operators authors use (eq, wildcard, regex_match, match) and how often each appears. Sample values are concrete examples to start from, not an exhaustive list.
Top indicator values (135 distinct)
Specific (field, operator, value) combinations the rules check for, ranked by how many rules under this technique use each one. The Corpus reach column counts how many rules across the entire catalog (any technique) check the same combination. High numbers point to widely-used indicators that are likely noisy on their own; combine them with another condition for useful signal. Blank means the combination is specific to rules under this technique. Click a value to expand the rules under this technique that use it.
Exclusions (74 distinct)
Field/operator/value combinations excluded by rules under this technique (top-level not() clauses), sorted by how many rules exclude each. These are the false-positive paths the community has learned to filter out. A new rule that ignores the high-count entries here will likely fire on the same noisy paths. Click a value to expand the rules under this technique that exclude it.
Rules under this technique
Every rule in the catalog tagged with this technique, grouped by vendor. Click a rule title for its full predicates, exclusions, and indicators.
Sigma 10 rules
- Audit CVE Event
- DNS Query Request By QuickAssist.EXE
- Exploitation Attempt Of CVE-2020-1472 - Execution of ZeroLogon PoC
- HackTool - SharpWSUS/WSUSpendu Execution
- Potential RDP Exploit CVE-2019-0708
- Remote domain controller password reset (Zerologon)
- Scanner PoC for CVE-2019-0708 RDP RCE Vuln
- Suspicious SysAidServer Child
- Terminal Service Process Spawn
- WannaCry Ransomware Activity
Elastic 6 rules
- Microsoft Exchange Server UM Spawning Suspicious Processes
- Microsoft Exchange Server UM Writing Suspicious Files
- Potential WSUS Abuse for Lateral Movement
- Unusual Child Process of dns.exe
- Unusual File Operation by dns.exe
- Unusual Process For MSSQL Service Accounts
Splunk 6 rules
- Detect Computer Changed with Anonymous Account
- Impacket Lateral Movement Activity (Sysmon)
- Impacket Lateral Movement Activity (Windows Event Log)
- Potential network connection with CVE-2023-21554 (Sysmon)
- Potential network connection with CVE-2023-21554 (Windows Event Log)
- ZeroLogon CVE-2020-1472 (Windows Event Log)