Registry key added with reg.exe (Windows Event Log)

Group by: _time, host
Source: github.com/anvilogic-forge/armory

Reg is a Windows utility used to interact with the Windows Registry. It can be used at the command-line interface to add information

MITRE ATT&CK coverage

Tactic	Techniques
Persistence	`T1112` Modify Registry
Defense Impairment	`T1112` Modify Registry

References

https://unit42.paloaltonetworks.com/unit42-rancor-targeted-attacks-south-east-asia-using-plaintee-ddkong-malware-families/

Telemetry coverage

Provider	Record / event type
Security-Auditing	Event ID 4688: A new process has been created.

Rule body

id: '6732.7877'
title: Registry key added with reg.exe
description: 'Reg is a Windows utility used to interact with the Windows Registry.
  It can be used at the command-line interface to add information. -- Threat Actor
  Association: APT35/Phosphorus/Magic Hound, APT37, APT41, FIN6, Flax Typhoon, Gorgon
  Group, Harvester, Lazarus, TA428, UNC2465, Vice Society, Witchetty -- Software Association:
  BianLian, BlackByte, Blackcat/ALPHV, Conti, Hive, Lorenz, Prestige, SmokedHAM, Snatch,
  Sodinokibi/REvil, Remcos, WIRTE, Vice Society, XingLocker, Zumkong -- Atomics T1021.001
  Test #4 Atomics T1546.010 Test #1'
logic_format: Splunk
logic: '`get_endpoint_data` `get_endpoint_data_winevent` (TERM(EventCode=4688) OR
  "<EventID>4688<") "reg" ("add" OR "import") | table _time, host, user user, process,
  process_*, parent_* | bin span=1s | stats values(*) as * by _time, host '
techniques:
- defense-evasion:modify registry
technique_id: 
- T1112
data_category:
- Process command-line parameters
- Windows event logs
references:
- https://unit42.paloaltonetworks.com/unit42-rancor-targeted-attacks-south-east-asia-using-plaintee-ddkong-malware-families/

Stages and Predicates

Stage 1: `search`

`get_endpoint_data` `get_endpoint_data_winevent` (TERM(EventCode=4688) OR "<EventID>4688<") "reg" ("add" OR "import")

Stage 2: `table`

| table _time, host, user user, process, process_*, parent_*

Stage 3: `bucket`

| bin span=1s

Stage 4: `stats`

| stats values(*) as * by _time, host

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`EventCode`	eq	`4688` corpus 317 (splunk 283, kusto 33, elastic 1)	`field:"EventID" kind:eq value:"4688"`

Search terms

These SPL tokens match against raw event text.

Stage	Term
1	`"<EventID>4688<"`
1	`"reg"`
1	`"add"`
1	`"import"`