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

Static analysis result for SHA-256 a2c19614094a90dd…

MALICIOUS

Office (OLE) / .XLS

185.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-03-14
MD5: c813aa5e2f9c6995cc1684e96043f342 SHA-1: 8e3097bc431e2e530701be0180287a86f7d8540b SHA-256: a2c19614094a90dd3db57d1dd7b122f96728f44e9a73bfc9fbb7be9567496d77
108 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an Excel file containing an embedded Equation Editor object that exploits 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, indicating the primary attack vector is the embedded OLE object.

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
b20f383af6f4459499308315fa95269770b77ad8f0bb731149aae4e1b50482ce		 ole-package OLE Ole10Native stream: MBD00D9583B/oLE10NAtive 1300 bytes

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