PowerShell Script with Veeam Credential Access Capabilities

 1[metadata]
 2creation_date = "2024/03/14"
 3integration = ["windows"]
 4maturity = "production"
 5updated_date = "2024/05/21"
 6
 7[rule]
 8author = ["Elastic"]
 9description = """
10Identifies PowerShell scripts that can access and decrypt Veeam credentials stored in MSSQL databases. Attackers can use
11Veeam Credentials to target backups as part of destructive operations such as Ransomware attacks.
12"""
13from = "now-9m"
14index = ["winlogbeat-*", "logs-windows.powershell*"]
15language = "kuery"
16license = "Elastic License v2"
17name = "PowerShell Script with Veeam Credential Access Capabilities"
18references = [
19    "https://forums.veeam.com/veeam-backup-replication-f2/recover-esxi-password-in-veeam-t34630.html",
20    "https://www.crowdstrike.com/blog/anatomy-of-alpha-spider-ransomware/",
21]
22risk_score = 47
23rule_id = "5c602cba-ae00-4488-845d-24de2b6d8055"
24setup = """## Setup
25
26The 'PowerShell Script Block Logging' logging policy must be enabled.
27Steps to implement the logging policy with Advanced Audit Configuration:

1
2Steps to implement the logging policy via registry:

 1"""
 2severity = "medium"
 3tags = [
 4    "Domain: Endpoint",
 5    "OS: Windows",
 6    "Use Case: Threat Detection",
 7    "Tactic: Credential Access",
 8    "Data Source: PowerShell Logs",
 9]
10timestamp_override = "event.ingested"
11type = "query"
12
13query = '''
14event.category:process and host.os.type:windows and
15  powershell.file.script_block_text : (
16    (
17      "[dbo].[Credentials]" and
18      ("Veeam" or "VeeamBackup")
19    ) or
20    "ProtectedStorage]::GetLocalString"
21  )
22'''
23
24
25[[rule.threat]]
26framework = "MITRE ATT&CK"
27[[rule.threat.technique]]
28id = "T1003"
29name = "OS Credential Dumping"
30reference = "https://attack.mitre.org/techniques/T1003/"
31
32[[rule.threat.technique]]
33id = "T1555"
34name = "Credentials from Password Stores"
35reference = "https://attack.mitre.org/techniques/T1555/"
36
37
38[rule.threat.tactic]
39id = "TA0006"
40name = "Credential Access"
41reference = "https://attack.mitre.org/tactics/TA0006/"
42[[rule.threat]]
43framework = "MITRE ATT&CK"
44[[rule.threat.technique]]
45id = "T1059"
46name = "Command and Scripting Interpreter"
47reference = "https://attack.mitre.org/techniques/T1059/"
48[[rule.threat.technique.subtechnique]]
49id = "T1059.001"
50name = "PowerShell"
51reference = "https://attack.mitre.org/techniques/T1059/001/"
52
53
54
55[rule.threat.tactic]
56id = "TA0002"
57name = "Execution"
58reference = "https://attack.mitre.org/tactics/TA0002/"