This query was originally published in the threat analytics report, Ransomware continues to hit healthcare, critical services. There is also a related blog.
Robbinhood is ransomware that has been involved in several high-profile incidents, including a 2019 attack on the city of Baltimore, Maryland. Robbinhood operators often employ a distinctive defense evasion technique, where they load a vulnerable driver on to a target and exploit it, in order to turn off security software -- essentially using the driver as malware.
The following query detects if a device contains the vulnerable drivers. These are often, but not always, implanted on the target by operators seeking to use this technique to turn off security software.
For a query that detects a later stage of this technique, see Detect security evasion related to the Robbinhood ransomware campaign.
DeviceFileEvents
| where Timestamp > ago(7d)
| where SHA1 in('0b15b5cc64caf0c6ad9bd759eb35383b1f718edf3d7ab4cd912d0d8c1826edf8',
'31f4cfb4c71da44120752721103a16512444c13c2ac2d857a7e6f13cb679b427')This query can be used to detect the following attack techniques and tactics (see MITRE ATT&CK framework) or security configuration states.
| Technique, tactic, or state | Covered? (v=yes) | Notes |
|---|---|---|
| Initial access | ||
| Execution | v | |
| Persistence | ||
| Privilege escalation | ||
| Defense evasion | v | |
| Credential Access | ||
| Discovery | ||
| Lateral movement | ||
| Collection | ||
| Command and control | ||
| Exfiltration | ||
| Impact | ||
| Vulnerability | ||
| Misconfiguration | ||
| Malware, component |
Contributor: Microsoft Threat Protection team