Office (OLE) / .XLS malware analysis — malicious · efd19ca51fe4400f

MALICIOUS

Office (OLE) / .XLS

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

MD5: 09dea08ff3465c2f86c082ee653b95f2 SHA-1: 3d788c6911b6b51ac4099e3f5fa71975734454eb SHA-256: efd19ca51fe4400f396b7e6bfd56159ab8cb88df2f8706b439d85056526eab2e

68 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.005 Visual Basic

The critical heuristic firing indicates the exploitation of CVE-2017-0199 via an OLE2Link object. This technique is used to download and execute a remote payload from a crafted URL. The extracted URL is the primary indicator of compromise. Although VBA macros were present, they contained no executable statements, suggesting the exploit is directly embedded within the OLE structure.

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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