MALICIOUS
60
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
The sample is a malicious Excel file that exploits CVE-2009-3129, a known vulnerability in Microsoft Excel related to the FEATHEADER record overflow. This exploit allows for arbitrary code execution. No document body or scripts were extracted, but the critical heuristic firing strongly indicates exploitation of this specific vulnerability.
Heuristics 1
-
CVE-2009-3129 — Excel FEATHEADER record overflow critical CVE exact CVE_2009_3129Workbook BIFF stream contains a FEATHEADER (Feature Header) record with anomalous size (record_size=23, isf=2, cbHdrData=4294967295). Legitimate FEATHEADER records are tiny (<100 bytes) and carry cbHdrData values that fit in the record body; the value here is the documented CVE-2009-3129 exploit primitive — cbHdrData drives a memcpy with attacker-controlled size, leading to memory corruption and code execution in Excel 2007/2003.
Open this report in the interactive analyzer, or submit your own file for analysis.