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

Static analysis result for SHA-256 727a57ada8f20f62…

MALICIOUS

Office (OLE) / .XLS

1.52 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-03-15
MD5: 8436dc83f7486c0f619126044e2b508e SHA-1: 07d6ea3a93c86bd133bb785a00a8f6117255bfb9 SHA-256: 727a57ada8f20f62dd37b2f5a48796840173428a1797d875383fb4cb6735846f
110 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file contains a critical heuristic indicating the presence of a payload exploiting CVE-2017-11882 within an Equation Editor OLE object. While the VBA macros themselves do not contain executable statements, the embedded OLE object is the primary vector for exploitation. This suggests the file is designed to leverage this known vulnerability for initial execution.

Heuristics 4

  • 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/

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
e12eb52c71a7ea6e36bf98e43dd53f33f85baf12834b45fac1093fbd8795d3f4		 ole-package OLE Ole10Native stream: MBD0127C3BA/OlE10nATIvE 1477 bytes

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