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

Static analysis result for SHA-256 4d2bdbb88b155c4a…

MALICIOUS

Office (OLE) / .XLSX

317.0 KB
MD5: 44745d37c7b0c3f2b8bf3f49e49b6fa9 SHA-1: d32ae96578d90b42d5c1e7b37a6fe88225e10f2b SHA-256: 4d2bdbb88b155c4ac890f127ef69fbc511a4991d6bece1d3354932e27c2fae2e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1559.001 Component Object Model

The file is a password-encrypted Excel spreadsheet identified as an exploit carrier. High-confidence heuristics indicate the presence of an Equation Editor OLE object, specifically triggering the CVE-2018-0798 detection. This suggests the document is designed to exploit a vulnerability within the Equation Editor component when opened, leading to the execution of a secondary payload. No document body or script content was extractable due to encryption.

Heuristics 5

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Default-encrypted OOXML embedded OLE object xl/embeddings/oleObject1.bin contains the Equation Editor CLSID, the legacy component exploited by CVE-2017-11882, CVE-2018-0802, and CVE-2018-0798.
  • CVE-2018-0798 — anomalous Equation Editor native stream high CVE likely CVE_2018_0798_EQUATION_NATIVE_ANOMALY
    Default-encrypted OOXML contains embedded Equation Editor data with anomalous native stream bytes consistent with a CVE-2018-0798-style exploit. This is treated as likely CVE evidence because the Equation object is malformed and payload-like.
  • 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 document is password-encrypted medium OFFICE_ENCRYPTED_PACKAGE
    OLE container holds MS-OFFCRYPTO encrypted package (Standard Encryption (Office 2007+, AES-128)).
  • 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.

Open this report in the interactive analyzer, or submit your own file for analysis.