Office (OLE) / .XLS malware analysis — malicious · bf933af46de63200

MALICIOUS

Office (OLE) / .XLS

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

MD5: b0d45f7f105ca7a313bca342c9ed7b1e SHA-1: 20fc16d2d9f6dc89ae073a76940339e9975c6ded SHA-256: bf933af46de6320053179dd5ec6e4025a7f391bbc5e38b9227e0baca44163236

128 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.005 Visual Basic

The sample is an XLS file that exploits CVE-2017-0199 via OLE2Link and URL Moniker to load a remote payload from the URL http://hop.fyi/mxcbs. ClamAV also detected it as Xls.Downloader.Trojan. Although VBA macros were extracted, they contained no executable statements, indicating the exploit is likely within the OLE structure itself.

Heuristics 3

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.
ClamAV: Xls.Downloader.Trojan-aa0b8f388d8573cd-aa0b8f388d8573cd-9950439-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Downloader.Trojan-aa0b8f388d8573cd-aa0b8f388d8573cd-9950439-0
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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