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

Static analysis result for SHA-256 ee008ff7b30d4fce…

MALICIOUS

Office (OLE) / .XLS

53.5 KB Created: 2022-12-27 08:20:12 Authoring application: Microsoft Excel First seen: 2022-12-27
MD5: 123bcba0e8bcbe0fe29a9bc82530ee66 SHA-1: 56c5c94780f2ab8cfb0c2777f2d54c6284ce3a92 SHA-256: ee008ff7b30d4fce17c5b07ed2d6a0593dc346f899eff3441d8fb3c190ef0e0e
348 Risk Score

Malware Insights

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

The VBA macros contain critical heuristics indicating the use of WScript.Shell and Shell() calls, along with downloading and saving a file from a URL. The script explicitly uses Microsoft.XMLHTTP and ADODB.Stream to download content from a URL, likely to execute a second-stage payload. The presence of 'agenzia.gov.it' in the document body suggests a lure related to Italian government agencies.

Heuristics 8

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • VBA downloads and writes a file to disk critical OLE_VBA_HTTP_DROP_EXEC
    VBA reads an HTTP response body and writes it to disk (ADODB.Stream SaveToFile). Combined with the auto-exec/Shell paths this is a download-drop dropper even when the COM ProgIDs are built dynamically to evade keyword scanning.
  • ClamAV: Xls.Downloader.b83ac4c497e169b5-9980307-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.b83ac4c497e169b5-9980307-0
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • 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
e5512ff867d5750a58f7c1f5e4a0d47b12d2b3b39a2b02482fd2e550a75b41f6		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 4180 bytes

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