Malicious Office (OLE) / .XLSX — malware analysis report

Static analysis result for SHA-256 95db03a58cdcefa4…

MALICIOUS

Office (OLE) / .XLSX

377.0 KB
MD5: 7acb989fd7d1eaa72980f95224c174e9 SHA-1: 2c80a727d63c077ad321ec1033583d2b095001c3 SHA-256: 95db03a58cdcefa4264f14067fbb6f9a3b3278cd447216eefe29f292c899c6cc
60 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link

The OOXML file is encrypted with a default password, a common technique to hide malicious content. The heuristic 'OOXML_ENCRYPTED_EXPLOIT_CARRIER_SHAPE' indicates the presence of an embedded object within the document, suggesting it's intended to carry and execute a secondary payload. The lack of extractable document body text and scripts prevents further analysis of the specific lure or payload delivery mechanism.

Heuristics 2

  • Default-encrypted OOXML exploit carrier layout high OOXML_ENCRYPTED_EXPLOIT_CARRIER_SHAPE
    Default-password encrypted OOXML package contains embedded OLE object parts and additional activation/decoy parts. This layout is common in malicious Excel exploit delivery and requires inspecting the decrypted package.
  • Office OOXML encrypted with default VelvetSweatshop password medium OFFICE_DEFAULT_PASSWORD_ENCRYPTED_OOXML
    OLE EncryptedPackage decrypts with Excel's built-in VelvetSweatshop password. Office opens this transparently, and malware uses it to hide OOXML exploit parts from scanners that only inspect the outer OLE container.