MALICIOUS
60
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
The file is a Microsoft Excel spreadsheet that triggers a critical heuristic for CVE-2009-3129, an Excel FEATHEADER record overflow vulnerability. This vulnerability allows for arbitrary code execution, indicating a malicious intent to exploit a known flaw in older Excel versions. No further IOCs were extracted from this sample.
Heuristics 1
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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.
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