Office (OLE) / .XLS malware analysis — malicious · 8994f9b15516e40c

MALICIOUS

Office (OLE) / .XLS

210.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-01-21

MD5: caca5486189433c6224ff4c64794b3da SHA-1: 75f55eadef7f77771f2cee093a4f28bf4a85cab7 SHA-256: 8994f9b15516e40cd1a401790b9c8974a0bd3e4b450f42642ee6e2696303b353

110 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.005 PowerShell

The sample is an Excel file containing an embedded Equation Editor object that exploits CVE-2017-11882. This vulnerability allows for arbitrary code execution when the object is processed. No VBA macros were found to be executable, but the presence of the vulnerable OLE object is a strong indicator of malicious intent. The specific payload executed by the Equation Editor exploit is not detailed in 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` `43a22aa7157180d31e577f82f1e6d08049559ef390e08a3489064bf6a67e5bec`	ole-package	OLE Ole10Native stream: MBD00247F5C/olE10nATIvE	1570 bytes

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