Malicious Office (OLE) / .XLS — malware analysis report

Static analysis result for SHA-256 fc6b3cdfb12f267a…

MALICIOUS

Office (OLE) / .XLS

569.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-16
MD5: 9128e6bb42c81f0beb4ef4dd5aa25ff0 SHA-1: c35e31bcfb54a04c357b7d264bd2feef887a1d89 SHA-256: fc6b3cdfb12f267a2b929d2c3bcef4624adc0995d172683dd6ce738ca50e1588
108 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: Malicious Attachment T1059 Command and Scripting Interpreter T1059.005 Command and Scripting Interpreter: Visual Basic

The critical heuristic firing indicates the presence of a payload exploiting CVE-2017-11882 within an Equation Editor OLE object. This vulnerability is commonly used to execute arbitrary code upon opening the document. No VBA macros were found to be executable, and the document body was unreadable, suggesting the exploit is directly embedded within the OLE object.

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.

FilenameKindSourceSize
macros.bas
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes
ole10native_00.bin
93540ecc2b9c3420cdb13acc7dbe773f226494e20d65b2b590ecf3448be28a90		 ole-package OLE Ole10Native stream: MBD003DCE98/OlE10NaTIVE 2136 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.