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Unlock with Pro - from £29/user/moDetect Pretexting and Phishing for Information via Helpdesk Social Engineering in IBM QRadar
Reconnaissance-stage social engineering in which attackers contact an organization's helpdesk or employees by phone (vishing) or email under a false pretext — posing as a new hire, executive, or IT staff member — to elicit organizational information: employee IDs, org charts, software/VPN inventory, internal extensions, and password/MFA reset procedures. This intelligence is then weaponized for initial access, most notably by Scattered Spider (UNC3944), which called helpdesks impersonating employees to talk agents into resetting passwords and MFA enrollment ahead of the 2023 MGM Resorts and Caesars Entertainment intrusions. CISA AA23-320A documents the pattern: pretext call/email gathers org info and builds rapport, followed by a credential or MFA reset request that helpdesk staff approve without adequate identity verification. Because the initial contact rarely trips EDR, detection relies on correlating inbound lure emails impersonating IT/helpdesk with anomalous downstream identity operations (mass or unverified resets) performed by helpdesk-privileged accounts.
MITRE ATT&CK
- Tactic
- Reconnaissance
QRadar Detection Query
SELECT
DATEFORMAT(starttime, 'YYYY-MM-dd HH:mm:ss') AS EventTime,
"SenderAddress" AS SenderAddress,
"SenderDisplayName" AS SenderDisplayName,
"RecipientAddress" AS RecipientAddress,
"Subject" AS Subject,
'Phishing_InfoGathering_Lure' AS ThreatType
FROM events
WHERE LOGSOURCETYPENAME(devicetype) ILIKE '%Office 365%'
AND "SenderDisplayName" ILIKE ANY ('%helpdesk%', '%help desk%', '%it support%', '%service desk%')
AND (
"Subject" ILIKE '%verify your identity%'
OR "Subject" ILIKE '%password reset%'
OR "Subject" ILIKE '%mfa reset%'
OR "Subject" ILIKE '%org chart%'
OR "Subject" ILIKE '%employee id%'
OR "Subject" ILIKE '%service desk ticket%'
)
LAST 24 HOURS
ORDER BY starttime DESCQRadar AQL query for the email-lure vector of helpdesk pretexting: flags inbound Office 365 mail where the display name impersonates IT/helpdesk and the subject matches reset or info-gathering pretext language. Pair with a second scheduled AQL rule (using QRadar's Reference Set tracking of resets-per-actor-per-hour, since AQL alone cannot easily express the sliding-window distinct-count join) to catch the mass-reset follow-through vector.
Data Sources
Required Tables
False Positives & Tuning
- Legitimate automated password-expiration notices from the organization's verified internal helpdesk mailbox — exclude by authenticated sender domain
- IT-run phishing awareness simulations using helpdesk-styled pretext templates
- Ticketing system auto-notifications (ServiceNow, Freshservice) referencing employee IDs or reset tickets as part of normal workflow
Other platforms for THREAT-Recon-PretextingHelpdeskInfoGathering
Testing Methodology
Validate this detection against 3 adversary techniques from Atomic Red Team. Each test below lists the behaviour to exercise and the telemetry you should expect to see. Executable commands and cleanup steps are available with Pro.
- Test 1Simulated Helpdesk-Impersonation Phishing Lure Delivery
Expected signal: EmailEvents record with SenderDisplayName containing 'Help Desk', inbound direction, Subject matching pretext keyword list.
- Test 2Simulated Mass Helpdesk Password Reset (Graph PowerShell)
Expected signal: AuditLogs entries for 'Reset user password' with InitiatedBy matching the test helpdesk operator account, TargetResources listing three distinct users within the same hour.
- Test 3Simulated Post-Reset New-Device MFA Registration
Expected signal: Entra ID authentication methods audit trail showing a new phone method registered for atomic-test-user1 within minutes of the Alert 2 reset event.
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