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

Static analysis result for SHA-256 01ad4c4876d7ee73…

MALICIOUS

Office (OLE) / .XLSX

480.5 KB
MD5: 8b7d370e7c6bb0550373e989b9892193 SHA-1: 818fc9907d5ea3acaa39f0fa5187df6952c4eeb0 SHA-256: 01ad4c4876d7ee73576f56d60c339a0ede5cf4969840dedcff9b71f540983508
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1559.001 Component Object Model Hijacking

The file is an encrypted Office document that contains an embedded Equation Editor OLE object. Heuristics indicate exploitation of CVE-2018-0798 via anomalous Equation Editor native stream, suggesting it's an exploit carrier designed to execute arbitrary code. The document's encrypted nature and the presence of exploit-related OLE objects strongly point towards a malicious intent to compromise the user's system.

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.