Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 16f1a327b2b1aa4c…

MALICIOUS

Office (OOXML)

9.2 KB
MD5: 4d37b158686a8de67e3c7168e5ff3d92 SHA-1: 265ea170c619bd2e7cb0a82cd80c993c9aba8a6e SHA-256: 16f1a327b2b1aa4c871a5e9ddf0718f575d03ae72e782d12110f87eb5ce2f119
142 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The OOXML document contains a VBA macro that is automatically executed upon opening due to the Auto_Open subroutine. This macro constructs and executes a command using ShellExecute, which attempts to download a payload from the URL "https://www.bitly.com/asdoad". The VBA project part was renamed to evade detection, indicating a deliberate attempt to conceal malicious activity.

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/aosdkoaskd.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
8b619bae87c09a8a51f4a8a9e133e5e97928994f1b94c036705febb5af187414		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 719 bytes
vbaProject_00.bin
5c1d59329a8cbe8c3985b8ff591becd3e2fb06f0211b05692c1811487ce634bc		 vba-project OOXML VBA project: ppt/aosdkoaskd.b 19968 bytes

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