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

Static analysis result for SHA-256 7fb0d13c333aef86…

MALICIOUS

Office (OLE) / .XLS

1.06 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: df946e734bca37e4eaf06978a0b95ef1 SHA-1: c06f8ddc7d5cb1030c516286bd0a660502cbbe35 SHA-256: 7fb0d13c333aef86316da1494da234eade3b8db44fddd27affc38bae40614744
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 that the OLE object is designed to leverage a remote loader. The extracted URL is likely the source of the secondary payload. Although VBA macros were present, they contained no executable statements, suggesting the exploit is directly within the OLE structure.

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
382fc1344a2f0cf6eda18645d41def8d571debc6637bc7fe02a5c83715a51bef
vba-macro oletools.olevba.extract_macros (decoded VBA source) 2112 bytes