Office (OLE) / .XLS malware analysis — malicious · 92d33bc5bd17d1c6

MALICIOUS

Office (OLE) / .XLS

343.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-01-24

MD5: 0ab0095494c3b6beaf2fbfe4341f2a2b SHA-1: a8dd2e601c8c23797b8c542a86a7b598f3d5d727 SHA-256: 92d33bc5bd17d1c649537ed5ad1c55c25ee5b6b6d2588100610276a2ce1b5bbf

110 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.005 Visual Basic

The sample is an Excel file containing an embedded OLE object that exploits CVE-2017-11882 in the Equation Editor. This vulnerability is known to be used for arbitrary code execution. No VBA macros were found to be executable, and the embedded URL was confirmed benign, suggesting the primary attack vector is the Equation Editor exploit itself.

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` `c2e64621ca0a08040259f0319d11aaf1ed87e9998bacf2ce042e04fb75b6c40e`	ole-package	OLE Ole10Native stream: MBD0166EBF0/ole10naTIvE	1728 bytes

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