Office (OLE) / .XLS malware analysis — malicious · 6bc87d562d2667c7

MALICIOUS

Office (OLE) / .XLS

633.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-02-08

MD5: dac5ac774069414c354240cb0a83727a SHA-1: f944c7c6f17827ca975314de4929bd51bacb68c1 SHA-256: 6bc87d562d2667c71015dde859770f7ef5f0e10bc8b4c0291433ff806b4023aa

110 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1059.005 Visual Basic

The file is an Excel spreadsheet containing an embedded Equation Editor object. Static analysis identified a critical heuristic firing for CVE-2017-11882, indicating the exploitation of a known vulnerability in the Equation Editor component. While no VBA macros were found to be executable, the presence of the vulnerable OLE object strongly suggests an attempt to exploit this vulnerability for initial access. The exact payload is not discernible from the provided evidence.

Heuristics 4

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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1206 bytes
`ole10native_00.bin` `8fe5a14b2181b2aded2cf37db90ce8d4813833a9a62cff4030f3f4c4ac969f00`	ole-package	OLE Ole10Native stream: MBD015ABE46/olE10naTivE	1477 bytes

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