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

Static analysis result for SHA-256 ac92d9ba2051a4cf…

MALICIOUS

Office (OLE) / .XLS

421.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-10
MD5: e3f8690b87ac66a2676111429a4d7a4e SHA-1: 7cd47142324a0189504401a36653763a91f29604 SHA-256: ac92d9ba2051a4cf208a65508a09ba2f651d60c64d46170e9e970ae4a3e66e24
108 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.005 Visual Basic

The sample is an Excel file containing an embedded Equation Editor OLE object. Heuristics indicate this object exploits CVE-2017-11882, a known vulnerability for arbitrary code execution. No VBA macros were found to be executable, and the document body was not parsable. The primary attack vector is the exploitation of the Equation Editor vulnerability.

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
8f0d3d4194be19c95af27e4082153a2b879bbf086fb4462dfc6f2ce8d8c890cc		 ole-package OLE Ole10Native stream: MBD01FB0C82/olE10NaTIVe 1573 bytes

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