Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 c2df116218bdcf3e…

MALICIOUS

Office (OOXML)

9.8 KB Created: 2018-08-30 06:09:13 UTC Authoring application: Microsoft Excel 14.0300 First seen: 2019-11-20
MD5: e10d0b695ff99f1a40ea09fcbd26e93a SHA-1: 0a93dfcfd63e7055e4b8272fa84d65ecdfb57d4b SHA-256: c2df116218bdcf3e90d2baa161b54652812c794fea6eb3076775f7c7c3a7b069
120 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is an OOXML document containing an embedded OLE object, specifically identified as an Equation Editor object. High-severity heuristics indicate exploitation of CVE-2018-0798 via an anomalous Equation Editor native stream, which is a known method for executing arbitrary code. The embedded object likely contains shellcode, as suggested by the static triage heuristic.

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
  • Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin ooxml-ole-object OOXML embedded OLE part: xl/embeddings/oleObject1.bin 3584 bytes
SHA-256: 497c7b54fc90fba4cc217dcd46268ed12a6519ae317a87c59ea474bd9e872423
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis found candidate code region(s). Indicators: SC_GETPC_CALL
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML xl/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 1532 bytes
SHA-256: 8ccfc031682b84ba3bbc3d4192da65fcf268b37fa4e920b76d9e8c914af7f341
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis found candidate code region(s). Indicators: SC_GETPC_CALL

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