Office (OLE) / .XLSX malware analysis — malicious · 62f7f0f108b2917e

MALICIOUS

Office (OLE) / .XLSX

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

MD5: fc115ddf87fc27c8129a376fbdf97a21 SHA-1: b5f99151cbfef400312fde3d6a0710095d04bd7d SHA-256: 62f7f0f108b2917e131e5ccecec638c4e8215fe3e1921e960b5893fec15a35ea

100 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious File

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates the presence of a known exploit for Equation Editor. This exploit is typically used to download and execute a second-stage payload. The OLE object is embedded within an Office document, suggesting a spearphishing or social engineering vector.

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` `65c408b5cbd12a6d22e33352dbd44f8be4b56eb21375c0720cb615b90e6f50c3`	ole-package	OLE Ole10Native stream: MBD01E1189D/OLe10nATIve	1609 bytes

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