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

Static analysis result for SHA-256 49a66a1dbe78f3b4…

MALICIOUS

Office (OLE) / .XLS

396.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2026-06-04T05:00:00+00:00
MD5: 16691acf970bdd26372ab350bb8a8361 SHA-1: 240c8303bf2e62d3c9f3c6db19fc69ce2d1e1ba2 SHA-256: 49a66a1dbe78f3b4ea364949c691c707feb8aec0cf68bc32393b0fcaa22f2503
108 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing indicates the presence of a payload for CVE-2017-11882 within an Equation Editor OLE object. This vulnerability allows for arbitrary code execution when the vulnerable component is loaded. No VBA macros were found to be executable, and no document body was available for analysis.

Heuristics 3

  • 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.

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
ea8edcd1e16ccee4173f662b729a7893cd9426faf35fbc2d7a5be33e4f810eab		 ole-package OLE Ole10Native stream: MBD0088A75C/Ole10naTiVE 1979 bytes

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