Office (OLE) / .XLS malware analysis — malicious · 9466cab529f4149a

MALICIOUS

Office (OLE) / .XLS

1.00 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-24

MD5: 0006ef55842a1cf9e59f133466da034f SHA-1: a351c5309dfbbd29cfba4be31c611df35b70a9d6 SHA-256: 9466cab529f4149afe59277c679715e2da2d618cb89aba8d4d21537d96fab34e

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 presence of a payload exploiting this specific vulnerability. The OLE_EQUATION_EDITOR heuristic further confirms the use of Equation Editor, a common vector for this exploit. The file is an Excel spreadsheet, suggesting it was delivered as a lure to entice the user to open it and trigger the exploit.

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` `9e1429b4b8055ac352243bf9deae9c2b98b2cce9d313b76d3d4e10e74d2eff07`	ole-package	OLE Ole10Native stream: MBD02C23293/oLE10naTiVE	1747 bytes

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