IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Potential Masquerading as Communication Apps
editPotential Masquerading as Communication Apps
editIdentifies suspicious instances of communications apps, both unsigned and renamed ones, that can indicate an attempt to conceal malicious activity, bypass security features such as allowlists, or trick users into executing malware.
Rule type: eql
Rule indices:
- logs-endpoint.events.*
Severity: low
Risk score: 21
Runs every: 5m
Searches indices from: now-9m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
References: None
Tags:
- Domain: Endpoint
- OS: Windows
- Use Case: Threat Detection
- Tactic: Defense Evasion
- Rule Type: BBR
Version: 1
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule query
editprocess where host.os.type == "windows" and event.type == "start" and ( /* Slack */ (process.name : "slack.exe" and not (process.code_signature.subject_name : "Slack Technologies, Inc." and process.code_signature.trusted == true) ) or /* WebEx */ (process.name : "WebexHost.exe" and not (process.code_signature.subject_name : ("Cisco WebEx LLC", "Cisco Systems, Inc.") and process.code_signature.trusted == true) ) or /* Teams */ (process.name : "Teams.exe" and not (process.code_signature.subject_name : "Microsoft Corporation" and process.code_signature.trusted == true) ) or /* Discord */ (process.name : "Discord.exe" and not (process.code_signature.subject_name : "Discord Inc." and process.code_signature.trusted == true) ) or /* RocketChat */ (process.name : "Rocket.Chat.exe" and not (process.code_signature.subject_name : "Rocket.Chat Technologies Corp." and process.code_signature.trusted == true) ) or /* Mattermost */ (process.name : "Mattermost.exe" and not (process.code_signature.subject_name : "Mattermost, Inc." and process.code_signature.trusted == true) ) or /* WhatsApp */ (process.name : "WhatsApp.exe" and not (process.code_signature.subject_name : "WhatsApp LLC" and process.code_signature.trusted == true) ) or /* Zoom */ (process.name : "Zoom.exe" and not (process.code_signature.subject_name : "Zoom Video Communications, Inc." and process.code_signature.trusted == true) ) )
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
-
Technique:
- Name: Masquerading
- ID: T1036
- Reference URL: https://attack.mitre.org/techniques/T1036/