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

Static analysis result for SHA-256 c1da0ab115ca1f34…

MALICIOUS

Office (OLE) / .XLS

1.10 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-02-21
MD5: 4a771688864b87a40a5d9d0aa64d5fe9 SHA-1: e1143f5b24fe75e75f730c40f0cc96e410611548 SHA-256: c1da0ab115ca1f341e89af595a1e4a3bc28d7fed17536b377c969d85ae0529d6
102 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 detected a critical heuristic firing for CVE-2017-11882, indicating exploitation of this vulnerability. The embedded object likely contains and executes a second-stage payload.

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.
  • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ole10native_00.bin
593fe82977dc65ea36f0d8dc12f06e65debaca3e7bac9014487a6d1c298651fc		 ole-package OLE Ole10Native stream: MBD0093BEB0/oLe10nAtIvE 1599 bytes

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