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

Static analysis result for SHA-256 b63a846d80c3f42b…

MALICIOUS

Office (OLE) / .XLS

1.33 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-01-30
MD5: b54c1c8fe2234c6c4703025bf8c5d3e8 SHA-1: e553f7475fb8f8dc3d8305271898f378c2b4cec6 SHA-256: b63a846d80c3f42ba49b24071706e928e782481a8e46190248cd609da8bec7eb
110 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059 Command and Scripting Interpreter

The sample is an Excel file containing an embedded Equation Editor object that exploits CVE-2017-11882. This vulnerability allows for the execution of arbitrary code, indicating the file's purpose is to deliver a malicious payload. No VBA macros were found to be executable, and the embedded URLs were confirmed as benign.

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://schemas.openxmlformats.org/drawingml/2006/main
    • 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/
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships

Extracted artifacts 3

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
f81b5dc0f134bff67b32850863689811e3ff1dad6ed5cd918403c20cc4d6ab1e		 ole-package OLE Ole10Native stream: MBD00768FF5/Ole10Native 30803 bytes
ole10native_02.bin
e8089cc2c0f2c731c765bf5b787aceaf769bf0928baf30011253fc617c6fc002		 ole-package OLE Ole10Native stream: MBD00768FFC/OLe10nAtive 2063 bytes

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