Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 11cab10fc1924378…

MALICIOUS

Office (OOXML)

9.1 KB
MD5: e8e5140d39a1e2f8c0a09eb39686c275 SHA-1: 4101a63edfc9921c9c769188bbb2d0f0e2c96b8a SHA-256: 11cab10fc1924378c0b54192c1c865e29d1db49c36a2200007a459bf4e5c96a7
142 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample contains a VBA macro with an Auto_Open subroutine, which is a common technique for executing malicious code upon opening the document. The script constructs a command to open cmd.exe and execute a URL, likely to download and run a second-stage payload. The reconstructed URL is https://www.bitl.y.com/asdodo.

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/cam.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
937f89158e75db3a1fda50d364c13a8101907c37512443fc579ba47c62a05a9b		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 724 bytes
vbaProject_00.bin
d47cfb80e3593f3970f8452061f80367a6b1325b8e15ddf11996d0af35c6d45b		 vba-project OOXML VBA project: ppt/cam.b 19456 bytes

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