Office (OLE) / .XLSX malware analysis — malicious · fe229b2214a40f85

MALICIOUS

Office (OLE) / .XLSX

168.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-10-11

MD5: 48b1bf14902e438d67745d75c4a04881 SHA-1: 6f9bdb7f4c4efdc118c45e761f879bd751f959c1 SHA-256: fe229b2214a40f85abb3eabf833097940574b26f5a8eb125bb2ec71946663938

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 indicates the exploitation of a known vulnerability in Microsoft Equation Editor. This is further supported by the OLE_EQUATION_EDITOR heuristic. The embedded OLE object, ole10native_00.bin, likely contains the exploit code and initial payload, leading to the execution of malicious code.

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` `c2e50e3b0a0a4f846d5a42a6dcd1ba423416c3efcf2a95b6ab366cf248cb4a0b`	ole-package	OLE Ole10Native stream: MBD01B7B7B7/OLe10NATivE	1715 bytes

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