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

Static analysis result for SHA-256 efb5d3fd0ca7fb5b…

MALICIOUS

Office (OLE) / .XLS

1019.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-02-22
MD5: 904198ed96ec4ce6d011c037a2713fe4 SHA-1: f025a41592eace75cff3d67c1c090dfcdbe2fd9b SHA-256: efb5d3fd0ca7fb5ba1a1e7e88b8492b0d43a4e121326b03b7851cdf1d0730ec7
110 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an Excel file containing a malicious OLE object exploiting CVE-2017-11882. This vulnerability allows for arbitrary code execution when the Equation Editor is rendered. The embedded OLE object, identified as ole10native_00.bin, likely contains the exploit payload. No VBA macros were found to be executable, indicating the exploit is delivered directly via the OLE object.

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
ff6ef9dd550752e8833ecdbcb2606cec7cd3d2e26142f848296da66d197cc6da		 ole-package OLE Ole10Native stream: MBD00E2BFDD/OLe10nATIVe 1738 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.