Office (OLE) / .XLS malware analysis — malicious · c12f334a2ebce4c3

MALICIOUS

Office (OLE) / .XLS

420.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-10-19

MD5: 36c864758770ea40a2f113cc4db525e3 SHA-1: 9e2cde118e420461e7ed4037568f4d319c023bda SHA-256: c12f334a2ebce4c32aaeac34ce672c856b76a8dfbc74811952e7a763798a0860

100 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates the exploitation of a known vulnerability in Microsoft Equation Editor. This technique is commonly used to execute arbitrary code, often leading to the download and execution of further malicious payloads. The presence of an OLE object further supports this attack 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` `52ccfcc47137e4d295c3dc276d389e5791451e709dc77e81e7818145f471d293`	ole-package	OLE Ole10Native stream: MBD03C279D8/OLe10NatIVe	1634 bytes

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