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blueteamer committed Mar 14, 2024
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title: 'Know your Enemy: Midnight Blizzard'
description: 'An overview and some facts about the russian group formerly known as NOBELLIUM.'
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---


Midnight Blizzard (NOBELLIUM), also known as APT29 and Cozy Bear, is a nation-state threat group powered by the russian foreign intelligence service (SRV)[^fn1]. This threat actor employs diverse tactics, techniques, and procedures (TTPs) to infiltrate target networks, compromising both organizations and individuals. Midnight Blizzard's arsenal includes phishing campaigns, password spray attacks, abuse of trusted relationships, and exploitation of vulnerabilities in various software and services. Understanding their modus operandi is crucial for developing effective mitigation strategies to safeguard against their malicious activities.
Midnight Blizzard, also known as APT29 and Cozy Bear, is a nation-state threat group powered by the russian foreign intelligence service (SRV)[^fn1]. This threat actor employs diverse tactics, techniques, and procedures (TTPs) to infiltrate target networks, compromising both organizations and individuals. Midnight Blizzard's arsenal includes phishing campaigns, password spray attacks, abuse of trusted relationships (MSP/CSP/Vendors), and exploitation of vulnerabilities in various software and services.

[^fn1]: Similar to the German BND.

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## Tactics, Techniques, and Procedures (TTPs):
## Tactics, Techniques, and Procedures (TTPs)

Midnight Blizzard's TTPs encompass a wide array of methods aimed at infiltrating target networks and achieving their objectives:

- Phishing Campaigns: Midnight Blizzard leverages phishing emails containing malicious attachments or links to gain initial access to target systems. These emails often appear to originate from authentic sources, increasing the likelihood of successful infiltration.
- Password Spray Attacks: The group employs password spray attacks to gain unauthorized access to valid accounts by systematically attempting commonly used passwords against multiple accounts.
- Abuse of Trusted Relationships: Midnight Blizzard targets and compromises MSPs/CSPs to exploit trusted relationships with their customers, enabling privileged access to target networks.
- Exploitation of Vulnerabilities: The group exploits vulnerabilities in various software and services, including CVE-2020-4006 (VMware Workspace One Access) and CVE-2019-19781 (Citrix Application Delivery Controller), to gain access to target networks and deploy malicious payloads.
- Password spray attacks
- Use of malicious attachments or links in phishing campaigns
- Abuse of trusted CSP/MSP relationships
- Delivery of malicious payloads via ISO files (html dropper in email attachment)
- Compromise of legitimate email addresses for phishing attacks
- Abuse of target's trusted relationships (supplier and partners)
- Exploitation of delegated administrative privileges (DAP)
- Modification of Azure Active Directory (AAD) for persistence and access
- Acquisition of domains using domain seasoning
- Use of dedicated infrastructure for anonymization
- Leveraging of legitimate services for hosting malicious content (DropBox)
- Implementation of supply chain compromises (Solarwind)
- Use of stolen Azure AD session tokens for initial access (private devices accessing company resources)
- Use of stolen AD FS keys for forging SAML tokens
- Exfiltration of data over C2 channels
- Acquisition of additional credentials for accessing email data
- Manipulation of existing privileged applications for exfiltration

## Mitigation Strategies:
## Known malware and vulnerabilities

### Malware
- BoomBox - A malicious downloader
- EnvyScout - A Stage 1 malicious payload
- FoggyWeb - Malware for targeting and extracting data from AD FS servers
- GoldFinder - A custom HTTP tracer tool
- GoldMax - A Stage 2 command-and-control (C2) backdoor
- Sibot - Malware used for persisting on a targeted system
- NativeZone - A malicious loader used to load malicious content
- VaporRage - Malicious downloaders dropped during initial access
- CCleaner -


### Vulnerabilities
- VMware Workspace One Access (CVE-2020-4006)
- Citrix Application Delivery Controller (CVE-2019-19781)
- Pulse Secure Pulse Connect Secure (CVE-2019-11510)
- Synacor Zimbra Collaboration Suite (CVE-2019-9670)
- Fortinet FortiOS (CVE-2018-13379)

## Mitigation Strategies

To mitigate the risk posed by Midnight Blizzard and safeguard against their malicious activities, organizations can implement the following mitigation strategies:

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- Patch Management: Regularly update software and services to address known vulnerabilities and reduce the likelihood of exploitation by threat actors.
- Network Segmentation: Segment networks to limit the lateral movement of threat actors within the network, thereby containing potential breaches and minimizing the impact of their activities.
- Monitoring and Detection: Deploy advanced threat detection systems capable of identifying and responding to suspicious activities indicative of Midnight Blizzard's TTPs.
- Conditional Access Policies: Restrict access to company resources by using tailored policies.


## Sources
- [Microsoft: "Microsoft Defender for Threat Intelligence - Intel Profiles: Midnight Blizzard"](https://ti.defender.microsoft.com/intel-profiles/d825313b053efea45228ff1f4cb17c8b5433dcd2f86353e28be2d484ce874616/tradeCraft)
- [Mandiant: "Backchannel Diplomacy: APT29’s Rapidly Evolving Diplomatic Phishing Operations"](https://www.mandiant.com/resources/blog/apt29-evolving-diplomatic-phishing)
- [Polish Government: "Espionage campaign linked to Russian intelligence services"](https://www.gov.pl/web/baza-wiedzy/espionage-campaign-linked-to-russian-intelligence-services)



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