Tamper With Sophos AV Registry Keys

 1title: Tamper With Sophos AV Registry Keys
 2id: 9f4662ac-17ca-43aa-8f12-5d7b989d0101
 3status: experimental
 4description: Detects tamper attempts to sophos av functionality via registry key modification
 5references:
 6    - https://redacted.com/blog/bianlian-ransomware-gang-gives-it-a-go/
 7author: Nasreddine Bencherchali (Nextron Systems)
 8date: 2022/09/02
 9modified: 2023/08/17
10tags:
11    - attack.defense_evasion
12    - attack.t1562.001
13logsource:
14    category: registry_set
15    product: windows
16detection:
17    selection:
18        TargetObject|contains:
19            - '\Sophos Endpoint Defense\TamperProtection\Config\SAVEnabled'
20            - '\Sophos Endpoint Defense\TamperProtection\Config\SEDEnabled'
21            - '\Sophos\SAVService\TamperProtection\Enabled'
22        Details: DWORD (0x00000000)
23    condition: selection
24falsepositives:
25    - Some FP may occur when the feature is disabled by the AV itself, you should always investigate if the action was legitimate
26level: high