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

Static analysis result for SHA-256 676c78462c65c332…

MALICIOUS

Office (OLE) / .XLS

10.5 KB
MD5: b319012f584255521ea28b1eb187f6fb SHA-1: cf2db7e6bbe8ddfa2d29c144207bfa21245ac9b7 SHA-256: 676c78462c65c3328d265be4567b6ad4f7054cc9fb4c2937987c3193e3843258
410 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer T1204.002 Malicious File

The Workbook_Open macro in this XLS file utilizes WScript.Shell to download a batch file from "https://bdnews25.com/wp-includes/assets/PO202503M.bat" and save it to the temporary directory as "PO202503M.bat". It then executes this downloaded file, indicating a downloader or dropper functionality.

Heuristics 11

  • 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
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • 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)
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://bdnews25.com/wp-includes/assets/PO202503M.bat

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
d316e3b90289ec0e47ceccce5fa3541d59a7ca83100a11a9258d4a3ea3f0d4b7		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1876 bytes

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