Office (OLE) / .XLSX malware analysis — malicious · 05801b01be1ce684

MALICIOUS

Office (OLE) / .XLSX

151.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-10-27

MD5: 8e5c9b8b0caff5d13ba976d5c529c5c4 SHA-1: 52d846fbf7d79c235d1a7708329956cd8280d563 SHA-256: 05801b01be1ce684339903e7cb981f17df5f966f77536ae6ea799d6bf6be5155

100 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1559.001 Component Object Model Hijacking

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE directly indicates exploitation of this known vulnerability. The presence of an Equation Editor OLE object further supports this finding. The embedded ole10native artifact likely contains the second-stage payload, though its specific contents could not be determined from the provided evidence.

Heuristics 2

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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ole10native_00.bin` `b8e02a9db3a479451d73a4c48c8fe9955f1e19e2650e3663e21af397d59dc88e`	ole-package	OLE Ole10Native stream: MBD01998937/OlE10nATIVe	1561 bytes

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