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

Static analysis result for SHA-256 e485d82a15bb2cb5…

MALICIOUS

Office (OLE) / .XLS

848.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-18
MD5: 54fddd49082f47bd759520624328fda0 SHA-1: 2a58ff89562ce220cdce2fef5eb4799fbb891295 SHA-256: e485d82a15bb2cb5e4557f2b92b4962fb5eced19488f847f563c225a0e05af4f
108 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing for CVE-2017_11882_EQUATION_OLE10NATIVE indicates that the file contains a payload designed to exploit this specific vulnerability in Microsoft Equation Editor. The OLE_EQUATION_EDITOR heuristic further confirms the presence of an Equation Editor OLE object. While VBA macros are present, they contain no executable statements, suggesting the exploit is directly embedded within the OLE object. The file's SHA256 hash is included as an IOC.

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
1d3b71b8c6234aace88f31f6e674b07383e015a2e68993dcd4fc2526aa470fe5		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2412 bytes
ole10native_00.bin
a82018cb9060365ad93aefeeff4f9a4744fef5179e63dd3f86cac3c1986f68e4		 ole-package OLE Ole10Native stream: MBD00B5F5BC/OLe10NatIvE 1632 bytes

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