Office (OLE) / .XLS malware analysis — malicious · 8260b450e066630c

MALICIOUS

Office (OLE) / .XLS

750.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-23

MD5: ed1586ecbcf764bbe528aea3b45e9cc2 SHA-1: 7fa4ca6ba334938e362d35bb5339cf069973bdb7 SHA-256: 8260b450e066630c181617a69f15df4fc663bfba8429b825ce36d23dd668b76b

108 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1059 Command and Scripting Interpreter T1059.005 Command and Scripting Interpreter: Visual Basic

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates the exploitation of a known vulnerability in the Equation Editor component of Microsoft Office. The OLE_EQUATION_EDITOR heuristic further supports this finding. Although the VBA macros themselves contain no executable statements, the presence of the Equation Editor exploit suggests the file is designed to leverage this vulnerability to execute a secondary payload, likely for initial access or further system compromise.

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` `3f0c787932b9008284ef9bfb406749cc9eb642267405b2f4574876ff05683f2d`	ole-package	OLE Ole10Native stream: MBD02029CF9/Ole10Native	1596 bytes

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