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

Static analysis result for SHA-256 17187faff069ea4e…

MALICIOUS

Office (OLE) / .XLSX

185.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-01-20
MD5: 0ec2ce77939bd3cad837bddbdd235d45 SHA-1: c270e3388e9b099a352132280f83f35cd1415233 SHA-256: 17187faff069ea4e8a0c9f2d7bea8ac65126e2bfdd2054aa19c8c8f63fa7e007
110 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059.005 Visual Basic

The file contains a malicious Equation Editor OLE object, specifically triggering the CVE-2017-11882 vulnerability. This indicates the file is designed to exploit this known flaw to execute arbitrary code. No VBA macros were found to be executable, and the embedded URL was confirmed benign, suggesting the primary attack vector is the Equation Editor exploit itself.

Heuristics 4

  • Equation Editor Ole10Native payload — CVE-2017-11882 critical CVE likely CVE_2017_11882_EQUATION_OLE10NATIVE
    An embedded Microsoft Equation 3.0 object (CLSID 0002CE02-0000-0000-C000-000000000046) carries an Ole10Native packager stream instead of the normal Equation Native/MTEF data. This is the weaponized Equation Editor RCE delivery shape used by CVE-2017-11882 / CVE-2018-0802 maldocs. The payload (font-record overflow + shellcode) is frequently encrypted and the stream name case-scrambled to evade scanners, but an Equation object holding an Ole10Native stream has no benign use.
  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Contains Equation Editor object — related to CVE-2017-11882 / CVE-2018-0802 exploitation, but CLSID presence alone is not the malformed MTEF exploit primitive.
  • VBA project contains no executable statements low OLE_VBA_MACROS
    Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes
ole10native_00.bin
cb7ed94c31a3a833b8b8b31c759d96fa41e6731d7df412305dbc9444bb02aeaf		 ole-package OLE Ole10Native stream: MBD0295DFA9/Ole10native 1682 bytes

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