Malicious Office (OLE) / .XLS — malware analysis report

Static analysis result for SHA-256 3a156f43c4b5ec3d…

MALICIOUS

Office (OLE) / .XLS

200.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: d252fe73d44921341f84f8fac3c318d2 SHA-1: 1cda8b7ce16b051f81d04ce2d9b3068b1e8e995e SHA-256: 3a156f43c4b5ec3dfa801f73b4c658df56f525c138895ad2464f4edeebee02af
128 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.005 Visual Basic

The critical heuristic firing for CVE_2017_0199 indicates the exploitation of a known vulnerability in OLE2Link objects to fetch a remote resource. The embedded URL, https://provit.uk/dmkMA5?&fondue=jaded&melody=robust&doctor=periodic&clam=shaky&ash=accidental&waterbed, is the primary indicator of the secondary payload's origin. Although VBA macros were present, they contained no executable statements, suggesting the exploit relies on the OLE vulnerability rather than macro execution.

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.

FilenameKindSourceSize
macros.bas
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673
vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes