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

Static analysis result for SHA-256 49238631256f8043…

MALICIOUS

Office (OLE) / .XLS

650.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-02-13
MD5: 1fd64c68d09df6674fdc82a5b419bd6b SHA-1: 0d709490b3c2df86d88d2f94ffc83b1bc364dca9 SHA-256: 49238631256f8043c3c488947c7ab25c442940ed02b36228d97e19ea1cba5076
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates the exploitation of a known vulnerability in Microsoft Equation Editor. This technique is commonly used to achieve initial code execution on a victim's machine. The embedded OLE object likely contains the exploit code and subsequent 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
c88300347ccce0580d1bbe4e7a9f5d60fa92dec641b18f1be57ef792155ba744
ole-package OLE Ole10Native stream: MBD00B17653/oLe10nATIVE 1549 bytes