Office (OLE) / .XLSX malware analysis — malicious · 8a1fbda779334255

MALICIOUS

Office (OLE) / .XLSX

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

MD5: 0c37ce3722d5c40f455a85337c2755a0 SHA-1: 7d103a5ac1acc8b50a1a94330d012c42360ce9d2 SHA-256: 8a1fbda779334255e8bd64158f0fa7cb7e203921f8701e60f1c8ab7a8c2f1a54

68 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.005 PowerShell T1059.001 PowerShell T1059.003 Windows Command Shell T1059.004 Python

The critical heuristic firing indicates exploitation of CVE-2017-0199 via an OLE2Link object, which is designed to download and execute a remote payload from the provided URL. The VBA project, while not containing directly executable statements, is part of the exploit chain. The sample is therefore acting as a loader for a secondary malicious 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.

URL https://st3.pro/s6zpy2l?&anatomy=rustic&buffet=resonant&copyright=imaginary&snail
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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