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

Static analysis result for SHA-256 ed04f2c7fddd7f3e…

MALICIOUS

Office (OOXML) / .XLSX

16.7 KB Created: 2021-02-12 14:21:03 UTC Authoring application: Microsoft Excel 12.0000
MD5: 2339e2808f04332c855b03c89dbaac77 SHA-1: c5f0374ecfd6a057ee1f4829cff46b676e795cf2 SHA-256: ed04f2c7fddd7f3edc73f84e897ccaeac26f52efe2255862881c5615d7982837
108 Risk Score

Malware Insights

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

The file is an Excel spreadsheet containing an embedded OLE object, specifically identified as an Equation Editor object. High-severity heuristics indicate a potential exploitation of CVE-2018-0798 within this object. The document body contains invoice-like text, suggesting a lure to encourage user interaction with the embedded malicious object. The primary attack vector appears to be exploiting a vulnerability within the Equation Editor OLE object to execute arbitrary code.

Heuristics 4

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    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
    Embedded Equation Editor OLE data contains anomalous native stream bytes consistent with a CVE-2018-0798-style Equation Editor exploit. This is treated as likely CVE evidence because the Equation object is malformed and payload-like, but it does not match the exact public matrix-overflow byte signature.
  • Embedded OLE object medium OOXML_OLE_OBJECT
    Document contains an embedded OLE object
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
edf2ca111a12f94f4012d0242bb6278f44733ba4266ca9ec59eb96ca16eacbbd		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/oleObject1.bin 4096 bytes
ooxml_oleobject_00_ole10native_00.bin
016faa22456ad4fe42a56a83ca2b04ac4e07eb3fb9284b94352d91214ba2f5f6		 ole-package OOXML xl/embeddings/oleObject1.bin Ole10Native stream: OLe10nAtivE 1649 bytes

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