Office (OLE) / .XLSX malware analysis — malicious · fb1b10459fc2bfbd

MALICIOUS

Office (OLE) / .XLSX

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

MD5: 9866677caef29d17d9201b93c253ac26 SHA-1: 600a9c9aaecf027b58152442ed5b13260b3b319d SHA-256: fb1b10459fc2bfbd5e87629c6fbaa2193f77b8e6e384f10be2fbb131c4b52289

100 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE strongly indicates exploitation of this known vulnerability. The presence of an Equation Editor OLE object further supports this finding. The exact payload and its subsequent actions are not detailed, but the exploit itself is the primary indicator of malicious intent.

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` `42207a979a8705b0d121f68b409338fb5a99f4b91e270f8f1898b9a06eb01b21`	ole-package	OLE Ole10Native stream: MBD0206CD8F/OlE10natIvE	1559 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.