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

Static analysis result for SHA-256 af31bcf14518ff29…

MALICIOUS

Office (OLE) / .XLS

1.06 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 1562ceec9e23070c4ed3edb5bd4f1fca SHA-1: ca7624899fe907c81d61f4f0e298ee18b0272477 SHA-256: af31bcf14518ff2944b1b26e3e17ce79cff355c1e2f1f86413ba7a676491c086
68 Risk Score

Malware Insights

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

The sample is an OLE2 file that fires a critical heuristic for CVE-2017-0199, indicating it uses a URL moniker to load remote content. The heuristic explicitly lists the URL 'https://linkrjb.me/MerMgv' as the source for this exploit. Although the VBA project itself contains no executable statements, the exploit mechanism is sufficient to download and execute a second-stage payload from the identified URL.

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.
  • 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