Office (OLE) / .XLS malware analysis — malicious · 15d2ef2e0905e5bc

MALICIOUS

Office (OLE) / .XLS

237.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-03-30

MD5: b961980c1ffa928b21d080672e0cfc72 SHA-1: 115415db7cddc5d1051cf18c6189186a730b955c SHA-256: 15d2ef2e0905e5bca529006cb17d215c69c1516ba656c30c1ddb081dc885bf15

70 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.005 Visual Basic

The critical heuristic firing for CVE_2017_0199 indicates that the OLE object attempts to load a remote resource via a URL moniker. The embedded URL, http://KKKKKK2K3K3K3K3K3K3K3KK3K3K3KK3K3K3K3KK3K34K4KK5KK5K5K5K5KK5L5K5K5L5KL5K5L5K5LK5L5K5LK5L5K5ERKLERKRELREKLLERKLRLERK4L4K3L4K4L4@107.175.202.148/50...............50..........doc, is likely the source of the secondary payload. Although no executable VBA code was found, the presence of the CVE exploit and the embedded URL strongly suggests a downloader or remote code execution attack.

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.
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://KKKKKK2K3K3K3K3K3K3K3KK3K3K3KK3K3K3K3KK3K34K4KK5KK5K5K5K5KK5L5K5K5L5KL5K5L5K5LK5L5K5LK5L5K5ERKLERKRELREKLLERKLRLERK4L4K3L4K4L4@107.175.202.148/50...............50..........doc

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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