Office (OLE) / .XLS malware analysis — malicious · 429a4e768bce1a6f

MALICIOUS

Office (OLE) / .XLS

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

MD5: fbeba0f2936e07779ef6a24d47d17e3f SHA-1: dece9b2cb49a974c6f79563f48551c2621a8524c SHA-256: 429a4e768bce1a6f99e8da81639d14203cf58ac3f9853acd4296e450488ca0bb

128 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.005 Service Execution: Visual Basic T1071.001 Web Protocols: Web Protocols

The file is an XLS document that triggers the CVE-2017-0199 vulnerability. This vulnerability allows the document to act as a remote loader, fetching and executing a payload from the embedded URL: https://provit.uk/UtcPYa?&weather=elated&demur=wandering&guest=deranged&button=shivering&counte. Although VBA macros were extracted, they contained no executable statements, indicating the exploit relies on the OLE vulnerability 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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