Office (OLE) / .XLS malware analysis — malicious · fcaa4c8f05d1b29e

MALICIOUS

Office (OLE) / .XLS

1.06 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel

MD5: bec8aa21eb13e1e483b1ecfa7cde2cfe SHA-1: 6d268ed42b94a9956baa42dc30593243beac14e8 SHA-256: fcaa4c8f05d1b29eaa89db704bfc5bb1c3f522cb536b9a74f8a7a4d26063374b

68 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.005 Visual Basic

The sample is an OLE file that exploits CVE-2017-0199 via a URL Moniker to act as a remote loader. The heuristic explicitly identifies the vulnerability and the URL from which the second-stage payload is downloaded. No VBA macros were found to be executable, but the core exploit mechanism is clear. The file's purpose is to download and execute arbitrary code from the specified URL.

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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