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

Static analysis result for SHA-256 70f3f1092e5df170…

MALICIOUS

Office (OLE) / .XLS

591.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2026-02-28
MD5: e6b3e70f91c1412423da94ee67dcd2f9 SHA-1: e9e7f6726c4a4ff258fbe1d9b77671fe9a18db82 SHA-256: 70f3f1092e5df170c6522ea35ed1c1caa0b44b5914c332e04f4136f5d9d0513b
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 an embedded Equation Editor OLE object. This vulnerability allows for arbitrary code execution when the document is opened. Although VBA macros were present, they contained no executable statements, suggesting the exploit is directly embedded.

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
3b5173dcff81c30d73bbbe1f582ae849831006bf08481224114828cf3eadb04b		 ole-package OLE Ole10Native stream: MBD01367A8F/oLE10NATivE 1744 bytes

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