Office (OLE) / .XLSX malware analysis — malicious · 89557a031bb8f713

MALICIOUS

Office (OLE) / .XLSX

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

MD5: 3b67fbe3f241868b8a1bf8631a778eb6 SHA-1: 6be4417090017d3d3c4a957e61e0e233329226bf SHA-256: 89557a031bb8f7131e9768921c7fb68ccde4fba3836fd4dba94ceea08ca9bb39

100 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The critical heuristic firing indicates the presence of a payload exploiting CVE-2017-11882 within an Equation Editor OLE object. This exploit is commonly used to deliver secondary payloads, making the file a malicious document designed for exploitation.

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` `04941ca74281dd7ca37fbb08b0af1f5f4be08a7b54259ae0f9ce6735bd38d0a7`	ole-package	OLE Ole10Native stream: MBD01370C36/OLE10NATIVe	1926 bytes

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