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

Static analysis result for SHA-256 73106518b0be5e97…

MALICIOUS

Office (OLE) / .XLS

880.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2026-03-12
MD5: daf2728681c10f04d868999d25c30bb8 SHA-1: 25ef4c10fe1361219230d68fa389e26154d64fd9 SHA-256: 73106518b0be5e97d84c46482e1aa9c84ab2f7f4792d6b43d09c129410f4329b
108 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing for CVE-2017_11882_EQUATION_OLE10NATIVE indicates that the file contains a payload designed to exploit this specific vulnerability in Microsoft Equation Editor. This vulnerability allows for arbitrary code execution when the Equation Editor object is processed. No VBA macros were found to contain executable statements, and no document body text 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
7fdb6ddcccfc007a7809ad137ac356aa1d166ff8873930a7598ecb0779c97881		 ole-package OLE Ole10Native stream: MBD010BD450/OlE10NATiVE 1766 bytes

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