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

Static analysis result for SHA-256 9c311263e7a86c94…

MALICIOUS

Office (OLE) / .XLS

750.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-22
MD5: 27c76cb1e3d638cf0c4bbefdc8d367d4 SHA-1: 92fb546ff0acd1754c0590b2f1e2ed1613b26833 SHA-256: 9c311263e7a86c9476cff8e849871d3c7b9ec68462b2be1ad867b927b8290469
108 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing for CVE-2017_11882_EQUATION_OLE10NATIVE indicates the presence of a payload exploiting this specific vulnerability within the Equation Editor OLE object. While the VBA macros themselves contain no executable statements, the embedded OLE object is the primary vector for exploitation. The file's metadata and structure are consistent with a malicious Office document.

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.
  • 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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
1d3b71b8c6234aace88f31f6e674b07383e015a2e68993dcd4fc2526aa470fe5		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2412 bytes
ole10native_00.bin
9e2e438a95e33e73ff4dd8dd5ab236f887104b2703b5212cfcb330ba53b846d5		 ole-package OLE Ole10Native stream: MBD01FD9637/oLe10nATiVE 1818 bytes

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