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

Static analysis result for SHA-256 3df2acbddbab857a…

MALICIOUS

Office (OLE) / .XLS

321.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 8965f788badebc565d2c760aadf9b880 SHA-1: a38fe24bf81df8a41df9b72c94e6230afd26c6c2 SHA-256: 3df2acbddbab857abc3a997ace7235b6853a26bb6256fef88cb7688ed3079353
68 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.005 Service Execution: Visual Basic T1059.001 Command and Scripting Interpreter: PowerShell

The critical heuristic firing indicates exploitation of CVE-2017-0199 via an OLE2Link object, which attempts to download a remote payload from the URL http://strms.ly/ErWB. Although the VBA project contains no executable statements, the presence of the OLE vulnerability strongly suggests a remote code execution attempt. The file is an Excel spreadsheet, a common delivery mechanism for such exploits.

Heuristics 2

  • OLE2Link / URL Moniker → remote loader — CVE-2017-0199 critical CVE likely CVE_2017_0199
    Document contains an embedded OLE link object whose URL Moniker points to a remote URL. When the host file is opened, Office follows the link, downloads the URL, and processes the response based on its Content-Type (HTA -> mshta.exe, RTF → Word, etc.) — the documented CVE-2017-0199 primitive. The URL extension is not a reliable filter; servers can return different payloads to Office's user agent.
  • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes

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