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

Static analysis result for SHA-256 30a00a6bc33282f8…

MALICIOUS

Office (OOXML) / .XLSX

1.99 MB Created: 2019-11-27 09:20:57 UTC Authoring application: Microsoft Excel 12.0000
MD5: 785021bda60cfa81e37bded0f5bbe308 SHA-1: e7fccfe5d539ebfa913c4a8c536482a8d614d4d2 SHA-256: 30a00a6bc33282f8b9b5f52790a14dfc290dd5721551d73d06e629bda4e7c3cd
80 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious Attachment

The sample is an Excel spreadsheet containing an embedded OLE object, specifically an Equation Editor object. Heuristics indicate a lure to enable macros or editing, a common tactic for macro-based malware droppers. No scripts were extracted, and the embedded OLE object's content could not be analyzed further.

Heuristics 3

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/DlbJMtihH.4tLLe contains the Equation Editor CLSID, the legacy component exploited by CVE-2017-11882, CVE-2018-0802, and CVE-2018-0798.
  • Embedded OLE object medium OOXML_OLE_OBJECT
    Document contains an embedded OLE object
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
13a1b7c58882b52b4ed222d2e2433b5b0a565abf54a882181f699c70bfc84b4c		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/DlbJMtihH.4tLLe 2764800 bytes
ooxml_oleobject_00_ole10native_00.bin
a195df7de3b496e09b8aec9d2617f86390e5d1f694764d0028cce592cccfcc63		 ole-package OOXML xl/embeddings/DlbJMtihH.4tLLe Ole10Native stream: OLE10NATIvE 2740701 bytes

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