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

Static analysis result for SHA-256 eef902138fc1ee63…

MALICIOUS

Office (OLE) / .XLS

74.0 KB Created: 2022-11-29 07:16:03 Authoring application: Microsoft Excel First seen: 2022-12-02
MD5: e0c21745090aee8f27f19c3805a50a30 SHA-1: f643300322a20f78e51f95ce956bed8d34bb4962 SHA-256: eef902138fc1ee637b41bbecd442a64b691b5b9aae15d2c822ac983ef93e4616
188 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer T1059.003 Windows Command Shell

The file contains VBA macros that utilize the `CreateObject("MSXML2.XMLHTTP")` to download content from a URL. The `Shell()` function is also present, indicating the execution of downloaded payloads. ClamAV detection further confirms its malicious nature as a downloader.

Heuristics 5

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Xls.Downloader.b83ac4c497e169b5-9980307-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.b83ac4c497e169b5-9980307-0
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
ea9aa5786435bec4eb395abb65c6116c3ff1fbdb76bac19e19b704997c425094		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 5077 bytes

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