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

Static analysis result for SHA-256 179312a53fd4c0a2…

MALICIOUS

Office (OLE) / .XLS

616.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2026-02-24
MD5: cff562b3acdaf3ed40876cb720f00fbb SHA-1: f6a953a1f12dd7e947dfd51138a89b3d0d4f08ac SHA-256: 179312a53fd4c0a2a5878205afcd34b23383e39ccd447a46d226adb20c2834e6
108 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The critical heuristic firing for CVE-2017_11882_EQUATION_OLE10NATIVE indicates that the file contains a payload designed to exploit this specific vulnerability. The presence of an Equation Editor OLE object further supports this finding. While VBA macros were present, they contained no executable statements, 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
a8c1051086e54e2139db0490d56327e08e5896b2fa933cca5acebc950438ef33		 ole-package OLE Ole10Native stream: MBD002106AD/OlE10NaTiVe 1727 bytes

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