Office (OLE) / .XLS malware analysis — malicious · 2c9c0ca1eedd1236

MALICIOUS

Office (OLE) / .XLS

846.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-02-28

MD5: 969c65960dbb1b4f41e99032606779ad SHA-1: f4d8fcd1cfcdac33c324fd0d5717337baf3ab424 SHA-256: 2c9c0ca1eedd12362fc910301256eeaa607b57d4804a8469064009419b6661b2

110 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1566 Phishing T1204.002 Malicious File T1059.005 Visual Basic

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates exploitation of this known vulnerability. The presence of an Equation Editor OLE object further supports this. While no VBA macros were found to be executable, the embedded Equation Editor object likely contains the exploit payload, which is designed to execute arbitrary code upon opening the document. The benign URL found is not considered a threat.

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` `15261136fee2150418bf7f62a4e763f99d576d6c4dc334edd4c3559642eb6af7`	ole-package	OLE Ole10Native stream: MBD01AEF19B/oLe10NaTivE	1364 bytes

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