Office (OLE) / .XLSX malware analysis — malicious · b5ac20d28c36a5ed

MALICIOUS

Office (OLE) / .XLSX

331.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel

MD5: 818a8751cefcd24f7d36579e12c351af SHA-1: 720cc6a9124b9727a6da920c58423dca670b9d24 SHA-256: b5ac20d28c36a5eddddef549a3cc1699b43a4dcdf8c3a5dbeac8bf57afed871e

68 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File Execution: Malicious File T1059.005 Command and Scripting Interpreter: Visual Basic

The critical heuristic firing indicates exploitation of CVE-2017-0199 via an OLE2Link object, which is designed to load remote content. The embedded URL 'https://jamp.to/8Vhnad' is highly suspicious and likely serves as the initial download source for a secondary payload. Although the VBA project contains no executable statements, the presence of the OLE vulnerability and the external URL strongly suggest a malicious intent to download and execute arbitrary code.

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.

Filename	Kind	Source	Size
`macros.bas` `7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1206 bytes

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