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

Static analysis result for SHA-256 03c2c9fb9c320044…

MALICIOUS

Office (OLE) / .XLS

61.5 KB Created: 2023-03-09 07:44:16 First seen: 2023-03-09
MD5: d3b21b3e4020d684f45cc121394b4609 SHA-1: 58bc8c84dd6c3986f4d9fed67a344a6f7c9c33f7 SHA-256: 03c2c9fb9c320044c7c3185d3f82cda2624c9544eaa648594e6d544129f890b0
288 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer T1071.001 Web Protocols

The VBA script utilizes WScript.Shell and CreateObject to download a file from the constructed URL 'http://internetOrios.com' and save it to disk as a '.cvs' file. The script also attempts to execute this downloaded file, indicating a downloader or droppper functionality. The use of Shell() and WScript.Shell are critical indicators of malicious intent.

Heuristics 7

  • 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.
  • 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
ef8c3bee56f10a65845fe1cf3468aa04a4d940b40e6f9d50170cb4c0704340e3		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2187 bytes

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