Malicious Office (OOXML) / .XLSM — malware analysis report

Static analysis result for SHA-256 dbf93e4942112716…

MALICIOUS

Office (OOXML) / .XLSM

36.1 KB Created: 2025-03-06 20:16:00 UTC Authoring application: Microsoft Excel 16.0300 First seen: 2025-03-11
MD5: 015feca1f37c6054871517fe657f7520 SHA-1: 9bd7b5c6f23da4dc85e8bf352285c6b01b0b4b23 SHA-256: dbf93e49421127168a80a7f036572651124bb3e754d3b35bb3a8849461041ddc
330 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1059.001 PowerShell T1105 Ingress Tool Transfer

The sample is a macro-enabled Excel file (.XLSM) that contains a Workbook_Open macro. This macro attempts to trick the user into enabling content by displaying a message box. Once enabled, it calls a VBA sub that uses WScript.Shell to execute a command. This command downloads a file from 'https://tursiian.com/7z.txt' and executes it, indicating a downloader or dropper functionality.

Heuristics 9

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • Obfuscated VBA Shell command with URL critical OLE_VBA_OBFUSCATED_SHELL_URL
    VBA macro invokes Shell with command text assembled through decoder or string-manipulation functions and includes a URL. This is a high-confidence downloader/dropper pattern, stronger than Shell or URL evidence on their own.
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject 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 project inside OOXML medium OOXML_VBA
    Document contains a VBA project — VBA macros present
  • 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://tursiian.com/7z.txt
    • https://f004.backblazeb2.com/file/mdocument/PO202502SNAKWS.zip

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
5718c456c76e5d510ab6e6a272e34ae1e0628cca284286ebd3e65aadf0f054c1		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 10252 bytes
vbaProject_00.bin
5b09c6d356e4cdef321cdd28d8a59aa1aec2882d5ff5421058195ea7e8741184		 vba-project OOXML VBA project: xl/vbaProject.bin 58368 bytes
emf_00.emf
b0ac6617d849e0c9d642af54351922aa696998284f32acf3c2d1044c634802b1		 ooxml-emf OOXML EMF part: xl/media/image1.emf 2744 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.