Xls.Downloader.b83ac4c497e169b5-9980307-0 — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 00e7d68dfb7f8691…

MALICIOUS

Office (OLE) / .XLS

74.0 KB Created: 2022-11-29 07:16:03 First seen: 2022-11-30
MD5: c673a9325c0ca54d36076f2514e02233 SHA-1: 73b5ba3667cbaccee3ba922972ca867d19e26440 SHA-256: 00e7d68dfb7f8691b6140ea9efe07b2f373a97b70b3eada8fbd13703f2da860e
188 Risk Score

Malware Insights

Xls.Downloader.b83ac4c497e169b5-9980307-0 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer T1059 Command and Scripting Interpreter

The file contains VBA macros that utilize `CreateObject("MSXML2.XMLHTTP")` and `Shell()` to download and execute a payload from a remote source. The ClamAV detection name 'Xls.Downloader.b83ac4c497e169b5-9980307-0' further supports its function as a downloader. The script's primary function is to fetch and run a secondary malicious component.

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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