Office (OLE) / .XLS malware analysis — malicious · 6c36a0686443954b

MALICIOUS

Office (OLE) / .XLS

848.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-18

MD5: 2c4a5deaf2031f371d858aab1f25c16e SHA-1: f424c1371af1b49b3a2566d03bd0101e8bae4623 SHA-256: 6c36a0686443954b81f75fa2e931cca5db4973a62dace0c5e24561193ed1002e

108 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.005 PowerShell

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates the file contains a payload designed to exploit this specific vulnerability. While VBA macros are present, they appear to be non-executable, suggesting the primary execution vector is the Equation Editor exploit. The file is likely a downloader or dropper for a secondary stage payload.

Heuristics 3

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.
VBA project contains no executable statements low OLE_VBA_MACROS

Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `1d3b71b8c6234aace88f31f6e674b07383e015a2e68993dcd4fc2526aa470fe5`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2412 bytes
`ole10native_00.bin` `cef236d88f020f4bf7f9461f90e2f385019054f8b1e60e41ebdaffe585c8884c`	ole-package	OLE Ole10Native stream: MBD00AD7A58/OlE10naTIVe	1387 bytes

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