Office (OLE) / .XLS malware analysis — malicious · b230dfad1077e1b8

MALICIOUS

Office (OLE) / .XLS

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

MD5: 0356349b370a1fdb4e66b359b6f081c4 SHA-1: ab87b798d7f7216b33d2228d4cdae71d2ecdd07a SHA-256: b230dfad1077e1b89ae2b96ffea186937e4c6aec89ca43476ae0ea42a3cb6a22

68 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.005 PowerShell T1071.001 Web Protocols: HTTP

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 the provided URL. The VBA project, while not containing executable statements directly, is part of the exploit mechanism. The extracted URL is the primary indicator of the secondary stage payload.

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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