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

Static analysis result for SHA-256 06908382bc3ed4c8…

MALICIOUS

Office (OLE) / .XLS

677.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2026-04-13
MD5: ae3c5206ff1262372052de2408e77d5e SHA-1: a652e82a08eb581be62b9de4a2d1771d6c94e504 SHA-256: 06908382bc3ed4c8eb132355220413b5db3d9e61fa25d89e3de96c5d0fd9c410
108 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing indicates the presence of a payload exploiting CVE-2017-11882 within an Equation Editor OLE object. This vulnerability allows for arbitrary code execution when the object is processed. No VBA macros were found to contain executable statements, and no scripts were extracted, suggesting the exploit is directly embedded within the OLE object.

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
b635bbf26a02354bd57ca33cb0085063b995049ab4a71707168454c32b910450		 ole-package OLE Ole10Native stream: MBD021EBAA9/ole10nAtIve 1769 bytes

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