Office (OLE) / .XLS malware analysis — malicious · b03061bbe4da848a

MALICIOUS

Office (OLE) / .XLS

401.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-01-19

MD5: 367d797b3a0dbe447dd435d2436e7f68 SHA-1: d098ad6206143eed8f70093c4df33efb16fbc3e9 SHA-256: b03061bbe4da848a9d28482519563a12d67b088d394c7e7c79b330a46c3f1a0d

130 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.005 Visual Basic

The sample is an Excel spreadsheet that exploits CVE-2017-0199 via an OLE2Link object. This technique is used to download and execute a remote payload from the embedded URL. The VBA macro source is present but contains no executable statements, suggesting the exploit is triggered by the OLE object itself. The ClamAV detection further confirms its malicious nature as a downloader.

Heuristics 4

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.94c25b356b5a6cac-9978798-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Downloader.94c25b356b5a6cac-9978798-0
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.
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://000000000000000000000000000000000000000000@104.223.76.152/_--00_o______---0-o_o00o0_0o0-000_0-__________o0o-__________/werdfgggdfggvfgggdggsahfhfghf.doc

Extracted artifacts 2

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
`ole10native_00.bin` `0e74f03b42dbfb73650ae77db35efc03f254670fe5c220fbf54bacb45cb41486`	ole-package	OLE Ole10Native stream: MBD026E76F1/Ole10Native	50530 bytes

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