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

Static analysis result for SHA-256 1f3dcdeed2927b17…

MALICIOUS

Office (OLE) / .XLS

202.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-01-23
MD5: a4cf33d694e906474d4104bf34f5fea1 SHA-1: f09eeac6fbc773ff52788b4500b44c296de9780b SHA-256: 1f3dcdeed2927b17d6241dfb607a96001a1334f01968fb58d018fa13634d8e6d
108 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an Excel file containing an embedded Equation Editor object, which is known to be vulnerable to CVE-2017-11882. This vulnerability allows for arbitrary code execution when the object is processed. No VBA macros were found to be executable, and the document body is minimal, indicating the primary attack vector is the Equation Editor exploit.

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
42f1b8f4313aaa46f9cf31b9b443b5933a7a58329c59988c2969ec1389d1c13a		 ole-package OLE Ole10Native stream: MBD0132983C/OLe10nAtIvE 1338 bytes

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