Detect MS08-067 NetAPI Buffer Overflow Exploitation Attempt (CVE-2008-4250) in Sumo Logic CSE
CVE-2008-4250 is a critical buffer overflow vulnerability in the Windows Server service (netapi32.dll) affecting Microsoft Windows XP, 2000, 2003, Vista, and Server 2008. Exploitation via a specially crafted RPC request to the NetpwPathCanonicalize function allows unauthenticated remote code execution as SYSTEM. This vulnerability was exploited by the Conficker worm and remains listed in CISA's Known Exploited Vulnerabilities catalog. Detection focuses on suspicious SMB/RPC activity, NetAPI service anomalies, and post-exploitation indicators including lateral movement and payload staging.
MITRE ATT&CK
Sumo Detection Query
_sourceCategory=windows/security OR _sourceCategory=windows/system
| parse "EventCode=*" as event_code nodrop
| parse "LogonType=*" as logon_type nodrop
| parse "IpAddress=*" as src_ip nodrop
| parse "NewProcessName=*" as new_process nodrop
| parse "ParentProcessName=*" as parent_process nodrop
| parse "ServiceName=*" as service_name nodrop
| where event_code in ("4624", "4625", "4688", "7045")
| eval is_smb_logon = if(event_code in ("4624","4625") and logon_type == "3", 1, 0)
| eval is_suspicious_proc = if(event_code == "4688" and parent_process matches "*svchost*" and new_process matches "*(cmd.exe|powershell.exe|wscript.exe)*", 1, 0)
| eval is_service_install = if(event_code == "7045", 1, 0)
| timeslice 5m
| stats sum(is_smb_logon) as smb_logons,
sum(is_suspicious_proc) as suspicious_procs,
sum(is_service_install) as service_installs,
dcount(src_ip) as unique_src_ips
by _timeslice, _sourceHost
| where suspicious_procs > 0 or service_installs > 3 or (smb_logons > 30 and unique_src_ips > 3)
| eval alert_reason = if(suspicious_procs > 0, "Suspicious svchost child process - possible MS08-067 RCE",
if(service_installs > 3, "Multiple service installs - possible Conficker persistence",
"High SMB logon volume - exploitation scan"))
| fields _timeslice, _sourceHost, alert_reason, smb_logons, suspicious_procs, service_installs, unique_src_ipsSumo Logic query detecting MS08-067 exploitation indicators by correlating SMB authentication volumes, suspicious svchost child process creation, and anomalous service installations across Windows event sources.
Data Sources
Required Tables
False Positives & Tuning
- Bulk software deployment via SCCM or similar tools triggering multiple service registrations
- Network monitoring tools generating high SMB connection volumes during scans
- Terminal server environments with large numbers of concurrent network logons
Other platforms for CVE-2008-4250
Testing Methodology
Validate this detection against 4 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 1MS08-067 Exploitation via Metasploit (Isolated Lab)
Expected signal: Inbound TCP connection to port 445 on target from attacker IP; svchost.exe spawning cmd.exe or a shell process; network connection back to attacker on port 4444; Windows Security Event 4624 (logon type 3) from attacker IP
- Test 2Conficker-Style SMB Scanning Simulation
Expected signal: High-volume TCP SYN packets to ports 445, 139, and 135 across multiple destination IPs; network flow logs showing >30 connections from single source within 5 minutes; IDS/firewall alerts for port scan activity
- Test 3Post-Exploitation Service Installation (Conficker Persistence Simulation)
Expected signal: Windows System Event ID 7045 (new service installed); Windows Security Event ID 4697 (service installed); Sysmon Event ID 12/13 registry modifications under HKLM\SYSTEM\CurrentControlSet\Services
- Test 4Lateral Movement via PsExec over SMB (Post-Exploitation Simulation)
Expected signal: TCP connection to port 445 on target; Windows Security Event 4624 (logon type 3) on target; PSEXESVC service installation Event ID 7045 on target; cmd.exe execution on target host under SYSTEM or Administrator context
Unlock Pro Content
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