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

Static analysis result for SHA-256 cdd12c8cc551f081…

MALICIOUS

Office (OLE) / .XLS

396.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2026-06-04T14:00:00+00:00
MD5: 78df7cab5bcf2d0c51210c3225721b4e SHA-1: e5b80c65c97d0865880988666469a4dfd24ee397 SHA-256: cdd12c8cc551f081b76d5681ebc2a82556fb23360ff584f1c734e0c8d83a8c13
108 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing for CVE-2017-11882 indicates that the file contains a payload designed to exploit this vulnerability in the Equation Editor. The presence of an OLE object containing this payload strongly suggests an attempt to execute arbitrary code upon opening the document. No VBA macros were found to be executable, and the document body was not parsable.

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
fa8432a8e76534b71c95d714a1cb962ced38a216c742b4a77b9078ea28369a86		 ole-package OLE Ole10Native stream: MBD003E6ED3/oLe10NatIVE 2185 bytes

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