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

Static analysis result for SHA-256 c9c664b5fcef2113…

MALICIOUS

Office (OLE) / .XLS

187.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-03-07
MD5: cbbf59795568c9bc067a4556c2517288 SHA-1: fedd573508f5260f5ddf835ef7db2b6df776314f SHA-256: c9c664b5fcef21137013b225015a7ab3bf980612d5590dbc634987ae21cddb91
108 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample contains an embedded Equation Editor OLE object that is known to be vulnerable to CVE-2017-11882. This vulnerability allows for arbitrary code execution when the object is processed. No VBA macros were found to be executable, and the document body is minimal, suggesting the primary attack vector is the exploit itself.

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
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes
ole10native_00.bin
d2af55b1b0f97713badd0e022c0db0e6578e6087c02951117937b6c03177ce7f		 ole-package OLE Ole10Native stream: MBD021E43E9/ole10nATIve 1521 bytes

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