SP 800-61 Rev. 2, Computer Security Incident Handling Guide | CSRC You need to publish two CNAME records for every domain they want to add the domain keys identified mail (DKIM). PDF OFFICE OF MANAGEMENT AND BUDGET - The White House The information is then used to access important accounts and can result in identity theft and financial loss.. PDF CISA MS-ISAC Ransomware Guide Depending on the vendor of the proxy and VPN solutions, you need to check the relevant logs. What systems are you using? Check with your provider to see what security options are available. See XML for details. a bank). Use Lumu to detect the devices that contacted the malicious sites and make sure that no additional contacts are reported. With basic auditing, administrators can see five or less events for a single request. The phishing incident response playbook contains all 7 steps defined by the NIST incident response process: Prepare, Detect, Analyze, Contain, Eradicate, Recover, Post-Incident Handling. In the SPF record, you can determine which IP addresses and domains can send email on behalf of the domain. Depending on the device this was performed, you need perform device-specific investigations. Ransomware Playbook 4 The threat actors conducted targeted spear-phishing attacks against multiple users at the customer account, sending the emails from a compromised third party that the users already had an established relationship with. As the very first step, you need to get a list of users / identities who received the phishing email. This playbook is created with the intention that not all Microsoft customers and their investigation teams will have the full Microsoft 365 E5 or Azure AD Premium P2 license suite available or configured in the tenant that is being investigated. Record the CorrelationID, Request ID and timestamp. You can download a pdf version of this page here. If a personal account was involved, contact the 3 major credit bureaus to enable fraud alerts. Check: emails with links to external and unknown URLs, any kind of notification of suspicious activity, who was targeted by the message (may be different than "successful" recipients), email metadata including message headers (see below), sender information from the 'from' field and the X-authenticated user header, use passive collection such as nslookup and whois to find IP addresses and registration information, submit links, attachments, and/or hashes to, submit links, attachments, and/or hashes to a malware sandbox such as, whether public or personal safety is at risk, whether personal data (or other sensitive data) is at risk, whether you are able to control/record critical systems, reduce access to critical services, systems, or data until investigation is complete, reenforce multi-factor authentication (MFA). What sign-ins happened with the account for the federated scenario? The "missed package" phishing messages, likely the work of a hacking-for-hire group, bounds into inboxes, bearing ASyncRAT. Adjust perimeter email filters to block similar messages. This article contains the following sections: Here are general settings and configurations you should complete before proceeding with the phishing investigation. Determine if any controls have failed when falling victim to an attack and rectify them. Enable anti-phishing capabilities email clients and web browsers often have anti-phishing capabilities. This playbook should be considered a guideline and needs to be adapted according to the specific requirements of each organization. Headers Routing Information: The routing information provides the route of an email as its being transferred between computers. For this investigation, it is assumed that you either have a sample phishing email, or parts of it like the sender's address, subject of the email, or parts of the message to start the investigation. For more details, see how to investigate alerts in Microsoft Defender for Endpoint. The specific kind of phishing email it is. It also gives extensive recommendations for enhancing an organization's existing incident response capability so that it is better prepared to handle malware incidents, particularly widespread ones. Document the following: What were you doing at the time you detected it? This playbook should be peer-reviewed, trained and practiced before your incident response team uses it. This report shows activities that could indicate a mailbox is being accessed illicitly. Originating IP: The original IP can be used to determine if the IP is blocklisted and to obtain the geo location. Official websites use .gov Change any affected passwords If possible, immediately change the password for any affected accounts. In this playbook the following mitigation steps are missing: Venkat is founder of FlexibleIR. This is the initial phase where organizations plan measures to respond effectively to incidents when they are discovered. Phishing is an attack that uses text, email, or social media to trick users into clicking a malicious link or attachment. IRP-Phishing main Public Incident Response Ressources - GitLab Look for unusual patterns such as odd times of the day, or unusual IP addresses, and look for patterns such as high volumes of moves, purges, or deletes. The attack will lure you in, using some kind of bait to fool you into making a mistake. PDF Conti Ransomware - U.S. Department of Defense For example, filter on User properties and get lastSignInDate along with it. Azure AD Incident Response PowerShell module: For installation instructions, see Azure AD Incident Response PowerShell Module. Many times, they will be in a separate location from that of the email server. Ransomware playbook (ITSM.00.099) - Canadian Centre for Cyber Security For NSA client requirements or general cybersecurity. Establish monitoring to detect further suspicious activity. A lock (LockA locked padlock) or https:// means youve safely connected to the .gov website. Here's an example: The other option is to use the New-ComplianceSearch cmdlet. In other w ords, incident response playbooks are subject-specific practical VPN/proxy logs Using Microsoft Defender for Endpoint The volume of data included here could be very substantial, so focus your search on users that would have high-impact if breached. Incident Response Playbook The cybersecurity vulnerability and incident response procedures currently used to identify, remediate, and recover from vulnerabilities and incidents affecting agency . The playbooks we are releasing today are intended to improve and standardize the approaches used by federal agencies to identify, remediate, and recover from vulnerabilities and incidents affecting their systems, said Matt Hartman, DeputyExecutiveAssistant Director for Cybersecurity. Use Lumu to find out from which devices the connections to phishing sites were made. A lock (LockA locked padlock) or https:// means youve safely connected to the .gov website. Investigate, remediate (contain, eradicate), and communicate in parallel! What sign-ins happened with the account for the managed scenario? Here are a few third-party URL reputation examples. Playbook: Phishing Investigate, remediate (contain, eradicate), and communicate in parallel! Look for and record the DeviceID and Device Owner. Authentication-Results: You can find what your email client authenticated when the email was sent. You need to check each identified mailbox for mailbox forwarding (also known as SMTP forwarding) or Inbox rules that forward email messages to external recipients (typically, newly-created Inbox rules). Once the above has been determined, then determine the priority level (this will be on a scale that you have determined, for instance, low priority to medium priority to high priority [this would be considered to be a Severe type of ranking]). Its no coincidence the name of these kinds of attacks sounds like fishing. Request password changes if needed. Several components of the message trace functionality are self-explanatory but Message-ID is a unique identifier for an email message and requires thorough understanding. The most common phishing attacks involve emails armed with malware hidden in attachments or links to infected websites, although phishing can be conducted via other methods such as voicemail, text messages, and social media, too. That meant two things: one, determining if any other endpoints were affected, here or at our locations worldwide; and two, pinpointing 'patient zero', the device where the attack originally got in. A phishing attack is an attempt by criminals to trick you into sharing information or taking an action that gives them access to your accounts, your computer, or even your network. Check ClientDisplayName(column C) for apps that seem suspicious. Any attempt to compromise a system and/or steal information by tricking a user into responding to a malicious message. Sender IP, SMTP Mail: Validate if this is a legitimate domain, -1: Bypass most spam filtering from a safe sender, safe recipient, or safe listed IP address (trusted partner), 0, 1: Non-spam because the message was scanned and determined to be clean, Ask Bing and Google - Search on the IP address. This article contains the following sections: What the signs of a phishing email look like, paying careful attention to phony looking Sender names, sender domains, and in particular, any misspellings in either the subject line or the content of the email message. ", In this example command, the query searches all tenant mailboxes for an email that contains the phrase "InvoiceUrgent" in the subject and copies the results to IRMailbox in a folder named "Investigation.".