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

Static analysis result for SHA-256 d8a351f051882043…

MALICIOUS

Office (OLE) / .XLSX

535.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-07
MD5: b0f5ffe17075b5d6c2e80933f75a6001 SHA-1: 1c7295bdffe14c70cf1ffbe422de72c8342227c8 SHA-256: d8a351f051882043baee1c804c045f092f66af348d81b27f5829a89fa29f7432
108 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing indicates the presence of a payload exploiting CVE-2017-11882 within the Equation Editor OLE object. This vulnerability is commonly used to achieve arbitrary code execution. No VBA macros were found to contain executable statements, and no document body text was available for analysis.

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
0ee8678c78d7b9de3d7c9ce3ac5868deb5956ee3deb3fa195596af821d0871d8		 ole-package OLE Ole10Native stream: MBD01052D76/Ole10nAtivE 1466 bytes

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