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

Static analysis result for SHA-256 cc77dde534b4aa32…

MALICIOUS

Office (OLE) / .XLSX

492.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-22
MD5: c8a472629bb9193b37b9156b91672bc9 SHA-1: 3b9c9ad2a30e7503f51bac7aad88783ed309d8b3 SHA-256: cc77dde534b4aa329ecf543351157ca8c9ee43730de6dbef2673d1f63f225f87
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 file contains a payload designed to exploit this known vulnerability. The presence of an Equation Editor OLE object further supports this. No VBA macros were found to contain executable statements, suggesting the primary malicious functionality relies on the OLE object exploit.

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
8b63cfbdef7ba6dd28852ffe7283fcc04dbe902a4924bef67a3ccc7e23aa7b0e		 ole-package OLE Ole10Native stream: MBD021EF6A6/Ole10Native 1622 bytes

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