Office (OLE) / .XLS malware analysis — malicious · 61fe9f95f15334c2

MALICIOUS

Office (OLE) / .XLS

73.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-23

MD5: aa47fce5c9db6e06ad3116845f725fa6 SHA-1: eae3e06a94745bfac6d33236b891279924e7de6a SHA-256: 61fe9f95f15334c2d92d207799346870a43588b4c8870911ee76010c837aafed

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 vulnerability within the Equation Editor OLE object. This technique is commonly used to execute arbitrary code, likely leading to the download and execution of a secondary payload. The file's structure and the specific exploit targeted suggest a downloader or dropper functionality.

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` `a1d5ff686d94f25be8c0f2d42eea9395a5e9eb7d305af624f923e21254120f7e`	ole-package	OLE Ole10Native stream: MBD023ECC03/OLE10NAtivE	1623 bytes

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