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

Static analysis result for SHA-256 ec46afa9cb44f9ff…

MALICIOUS

Office (OLE) / .XLS

1.96 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-02-24
MD5: 437f01cd6507a3fdaf7e39bc8eaf06cf SHA-1: d556cec3a64013b6c7d91afd472a261ae30651dd SHA-256: ec46afa9cb44f9ff27a5fb77b9b29f45ff5c98cd373206e8093848e900eea362
150 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1566 Phishing T1204.002 Malicious File T1059.005 Visual Basic

The sample contains an embedded Equation Editor OLE object that exploits CVE-2017-11882. This vulnerability is commonly used to deliver second-stage payloads. The heuristic for a password-protected archive lure suggests the document is intended to trick the user into opening an archive, likely containing the actual malware, after providing a password. No VBA macros were found to be executable, and no scripts were extracted.

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.

FilenameKindSourceSize
macros.bas
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes
ole10native_00.bin
9bb14138b9763845164fb4e33d5727afb373ad4affcd4381c2504468eb8d3cc1		 ole-package OLE Ole10Native stream: MBD0107AD8D/OlE10NAtIVE 1028574 bytes

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