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

Static analysis result for SHA-256 200f389a854aaa4e…

MALICIOUS

Office (OLE) / .XLS

169.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-06-19
MD5: 115e4f477137a6665e08bb5c579e0d60 SHA-1: efc49432f11f2bb051477b12d52ea70fd02a49b9 SHA-256: 200f389a854aaa4ebf864f3ad70f7eb4ee2526cd0e0cc0d5991b019c55a0085c
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 exploitation of a known vulnerability in the Equation Editor component of Microsoft Office. This vulnerability allows for arbitrary code execution when the malicious OLE object is processed. No VBA macros were found to contain executable statements, suggesting the exploit is directly within 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
03e3b9c69b2fdd82ffc588f42db1a1371e34741c129c1ed5c9ea33e556f65cf3		 ole-package OLE Ole10Native stream: MBD000BB3CA/Ole10nATIvE 1590 bytes

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