Description of Campaign
Macaw Locker ransomware is most likely a variant of WastedLocker and linked to the Evil Corp/Dridex Group. The ransomware was discovered in October 2021 and exfiltrates sensitive data before encrypting files.
Our Threat Research team is currently validating the found samples for overlap with Wastedlocker and other Dridex Group/Evil Corp-related ransomware versions.
Until further notice, our Threat Research team has added MITRE techniques and rules for Wastedlocker to this Campaign and advises organisations to take similar precautions for Macaw Locker as they would do for other campaigns linked to the Dridex Group/Evil Corp.
How to use this article:
- If a Threat Hunting table has been created, use the rules contained to search for malware related to this campaign.
- Review the product detection table and confirm that your environment is at least on the specified content version.
To download the latest content versions, go to the Security Updates page.
- Scroll down and review the "Product Countermeasures" section of this article. Consider implementing them if they are not already in place.
- Review KB91836 - Countermeasures for entry vector threats.
- Review KB87843 - Dynamic Application Containment rules and best practices.
- Review KB82925 - Identify what rule corresponds to an Adaptive Threat Protection and Threat Intelligence Exchange event.
Threat Hunting
| YARA |
title: Suspicious Multiple File Rename Or Delete Occurred
id: 97919310-06a7-482c-9639-92b67ed63cf8
status: experimental
description: Detects multiple file rename or delete events occurrence within a specified period of time by a same user (these events may signalize about ransomware activity).
tags:
- attack.impact
- attack.t1486
author: Vasiliy Burov, oscd.community
date: 2020/10/16
references:
- https://www.manageengine.com/data-security/how-to/how-to-detect-ransomware-attacks.html
logsource:
produc%WINDIR%\
service: security
definition: 'Requirements: Audit Policy : Policies/Windows Settings/Security Settings/Local Policies/Audit Policy/Audit object access, Policies/Windows Settings/Security Settings/Advanced Audit Policy Configuration/Object Access'
detection:
selection:
EventID: 4663
ObjectType: 'File'
AccessList: '%%1537'
Keywords: '0x8020000000000000'
timeframe: 30s
condition: selection | count() by SubjectLogonId > 10
falsepositives:
- Software uninstallation
- Files restore activities
level: medium |
This Knowledge Base article discusses a specific threat that's being tracked. The list of IOCs will change over time; check Trellix Insights for the latest IOCs.
Campaign IOC
| Type |
Value |
| SHA256 |
46878CF16C919445A9E5ADA3FF03CA3465C03323A3E8B31C2DE38EAE1C9259E4 |
| SHA256 |
E3CC9AEFF3CA0B31FDA840C2AAEF6BE57DFF6DD7FDFB6072B13BD6116BACAE30 |
Minimum Content Versions
| Content Type |
Version |
| V2 DAT (VirusScan Enterprise) |
10162 |
| V3 DAT (Endpoint Security) |
4614 |
Detection Summary
| IOC |
Scanner |
Detection |
| 46878CF16C919445A9E5ADA3FF03CA3465C03323A3E8B31C2DE38EAE1C9259E4 |
AVEngine V2 |
GenericRXQO-PU!B9EE938BE159 |
| AVEngine V3 |
GenericRXQO-PU!B9EE938BE159 |
| JTI (ATP Rules) |
JTI/Suspect.196612!b9ee938be159 |
| RP Static |
- |
| RP Dynamic |
- |
| IOC |
Scanner |
Detection |
| E3CC9AEFF3CA0B31FDA840C2AAEF6BE57DFF6DD7FDFB6072B13BD6116BACAE30 |
AVEngine V2 |
Generic trojan.qy |
| AVEngine V3 |
Generic trojan.qy |
| JTI (ATP Rules) |
JTI/Suspect.196612!92843c087ad5 |
| RP Static |
- |
| RP Dynamic |
- |
Minimum set of Manual Rules to improve protection to block this campaign:
IMPORTANT: Always follow best practices when you enable new rules and signatures.
When you implement new rules or signatures, always set them to Report mode first and check the alerts generated. Resolve any issues that arise and then set the rules to Block. This step mitigates against triggering false positives and allows you to refine your configuration.
For more information, see KB87843 - List of and best practices for Endpoint Security Dynamic Application Containment rules.
Endpoint Security - Advanced Threat Protection:
Rule ID: 4 Use GTI file reputation to identify trusted or malicious files
Endpoint Security - Exploit Prevention:
Rule ID: 6086 PowerShell Command Restriction - Command
Aggressive set of Manual Rules to improve protection to block this campaign:
IMPORTANT: Always follow best practices when you enable new rules and signatures.
When you implement new rules or signatures, always set them to Report mode first and check the alerts generated. Resolve any issues that arise and then set the rules to Block. This step mitigates against triggering false positives and allows you to refine your configuration.
For more information, see KB87843 - List of and best practices for Endpoint Security Dynamic Application Containment rules.
VirusScan Enterprise - Access Protection Rules:
Prevent creation of new executable files in the Windows folder
Host Intrusion Prevention:
Rule ID: 6010 Generic Application Hooking Protection
Rule ID: 1148 CMD Tool Access by a Network Aware Application
Rule ID: 6011 Generic Application Invocation Protection
Rule ID: 1020 Windows Agent Shielding - File Access
