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

Static analysis result for SHA-256 245658e977f07f29…

MALICIOUS

Office (OLE) / .XLS

393.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-07
MD5: ec37ca08a1afe470d5f284d3230c260a SHA-1: e327cfcedbfa6cae141841cec697bf0f2681a762 SHA-256: 245658e977f07f292676ddb132aa2f6b6bb9b6933223e031f48cb77edbd1b745
108 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: Exploitation for Public-Facing Application

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates the presence of a known exploit targeting the Equation Editor. This exploit is commonly used to deliver secondary payloads. No VBA macros were found to be executable, and the document body was not parsable.

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
797eca8ad5ae33bcdb9c841c8012a08e342e4a060b6564bff10e5c7e5837d615		 ole-package OLE Ole10Native stream: MBD014A0DE3/olE10NAtiVe 1454 bytes

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