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

Static analysis result for SHA-256 3076cb6e292d99f4…

MALICIOUS

Office (OLE) / .XLS

1.59 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-01-26
MD5: 9281a044182796eb8cb475c9d848b22c SHA-1: f022f15ecb7d248b643db4bd69137abbbfd1d135 SHA-256: 3076cb6e292d99f4a945ef56d63ce7b234215177fe8fae47b1811fc5503fc2dd
110 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an Excel file containing an embedded Equation Editor OLE object. Static analysis identified a critical vulnerability, CVE-2017-11882, associated with this object, indicating it's likely used for exploitation. The VBA project contains no executable statements, suggesting the exploit payload is delivered via the OLE object itself rather than macro code.

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

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
f03fd42e85e4d383d8876d58c3e99c5818feacd234bd591ce4f281d5ba33f66d		 ole-package OLE Ole10Native stream: MBD01DA324A/oLE10nAtIvE 1421 bytes

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