Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 34f6c0afb1de40e6…

MALICIOUS

Office (OOXML)

9.2 KB
MD5: 33dc8de639334e86d87ed07b98b65525 SHA-1: f3769e00439017595ac64b94454f476cd8699722 SHA-256: 34f6c0afb1de40e6df87fae5551211a5d873d0a6c46f21c6527ad9580cb539df
142 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1566.001 Spearphishing Attachment

The sample is an OOXML document containing a VBA macro that is automatically executed upon opening (Auto_Open). The macro constructs a command string and uses ShellExecute to run 'cmd.exe' with the argument 'msgbox/rmsh' followed by a concatenated URL. This indicates an attempt to download and execute a second-stage payload from the specified URL. The VBA project part was renamed to evade detection.

Heuristics 5

  • VBA project part renamed to evade filename detection high OOXML_VBA_PROJECT_RENAMED
    The VBA project is bound through the OOXML relationship/content type but its part is not named vbaProject.bin. Legitimate Office producers always emit vbaProject.bin; renaming it hides the macros from path-only scanners (observed in the SVCReady loader).
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_Open macro
  • 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 (project part renamed away from vbaProject.bin: ppt/aosdkaosd.b)
  • 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://www.bitl

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
1df5985f48f91742eb491a512079a8afd2f838dc0291eb948a5f408398fe23ed		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 721 bytes
vbaProject_00.bin
970027835c7405bc81dbc4ec0f173bf8479bcddfe710bc025cabdda76e7c29fe		 vba-project OOXML VBA project: ppt/aosdkaosd.b 19968 bytes

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