Detection rules › Splunk
Abuse EQNEDT32.EXE (EDR)
Detects potential malicious Microsoft Office payload (CVE-2017-11882 or CVE-2018-0798) on host. Equation Editor
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | T1203 Exploitation for Client Execution |
References
Event coverage
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 1 | Process creation |
| Security-Auditing | Event ID 4688 | A new process has been created. |
Rule body yaml
id: '1074.16965'
title: Abuse EQNEDT32.EXE
description: 'Detects potential malicious Microsoft Office payload (CVE-2017-11882
or CVE-2018-0798) on host. Equation Editor. -- Threat Actor Association: Bitter
APT, Lotus Blossom, SideWinder, TA428, Tonto Team - Software Association: Soul'
logic_format: Splunk
logic: ' `get_endpoint_data` `get_endpoint_data_edr` ((event_type IN ("childproc","netconn","proc"))
OR (TERM(ProcessRollup2) OR Type=Process) OR TERM(DeviceProcessEvents)) "EQNEDT32.EXE"
| table _time, host, user _time, host, session_id, process, signature_id, parent_process_name,
process_name, user | bin span=300s | stats values(*) as * by _time, host | where
match(parent_process_name, "(?i)EQNEDT32.EXE") | table _time, host, user _time,
host, session_id, process, signature_id, parent_process_name, user `hec_collect`'
techniques:
- execution:exploitation for client execution
technique_id:
- T1203
data_category:
- EDR Logs
references:
- https://www.fireeye.com/blog/threat-research/2017/12/targeted-attack-in-middle-east-by-apt34.html
Stages and Predicates
Stage 1: search
`get_endpoint_data` `get_endpoint_data_edr` ((event_type IN ("childproc","netconn","proc")) OR (TERM(ProcessRollup2) OR Type=Process) OR TERM(DeviceProcessEvents)) "EQNEDT32.EXE"
Stage 2: table
| table _time, host, user _time, host, session_id, process, signature_id, parent_process_name, process_name, user
Stage 3: bucket
| bin span=300s
Stage 4: stats
| stats values(*) as * by _time, host
Stage 5: where
| where match(parent_process_name, "(?i)EQNEDT32.EXE")
Stage 6: table
| table _time, host, user _time, host, session_id, process, signature_id, parent_process_name, user `hec_collect`
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
event_type | in |
|
parent_process_name | match |
|
Search terms
Bare-string tokens in the SPL search body. Splunk matches each token against _raw (the untyped raw event text) anywhere it appears, not against a specific field. These don't surface in the Indicators table because they aren't predicates on a known field.
| Stage | Term |
|---|---|
| 1 | TERM |
| 1 | ProcessRollup2 |
| 1 | TERM |
| 1 | DeviceProcessEvents |
| 1 | "EQNEDT32.EXE" |