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

Static analysis result for SHA-256 827b155806cb5c7a…

MALICIOUS

Office (OLE) / .XLS

396.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2026-06-02T14:00:00+00:00
MD5: 83976a086d1e9dbb6d2e357627e77727 SHA-1: 5d6450ee01cfce33d3acf4155ec47cda2c9cc451 SHA-256: 827b155806cb5c7a61c8bee24eb8fdc8b39d098f80a1c34edfef9020bfc41f0d
108 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1059 Command and Scripting Interpreter T1059.005 Command and Scripting Interpreter: Visual Basic

The critical heuristic firing for CVE-2017_11882_EQUATION_OLE10NATIVE indicates that this file exploits a known vulnerability in Microsoft Equation Editor. The presence of an OLE object containing an Equation Editor payload further supports this. No VBA macros were found to be executable, and the document body was unreadable, suggesting the exploit is the primary mechanism for payload delivery.

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
0f7339bd1eb550f4dd45ba36920e28d40143e2d97ec748af7dfd40335e0b2104		 ole-package OLE Ole10Native stream: MBD0083E463/OLE10nAtivE 2037 bytes

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