Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 cf1b8acd3a6f1360…

MALICIOUS

Office (OOXML)

7.8 KB
MD5: 15b9168a6dff8f614f2fab8664c8f5b9 SHA-1: 44837bdddbca511a914ddebb9a97f508581389a2 SHA-256: cf1b8acd3a6f1360e1db30a67212c76588aef7303363fac7196e0f51e9d2e876
210 Risk Score

Malware Insights

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

The sample contains VBA macros with Auto_open and Auto_close functions. The Auto_open macro utilizes URLDownloadToFileA to download two files: 'msi.ps1' from http://updatewin32.xyz/3.txt and 'ComeCome.vbs' from http://edc.com.ly/index/wp.txt. These downloaded files are saved to the Public user directory, indicating an attempt to download and execute further payloads.

Heuristics 7

  • URLDownloadToFile in VBA critical OLE_VBA_DOWNLOAD
    URLDownloadToFile in VBA
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_Open macro
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close 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
  • 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 http://updatewin32.xyz/3.txt
    • http://edc.com.ly/index/wp.txt
    • http://updatewin32.xyz/3.txt�
    • http://edc.com.ly/index/wp.txt�

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
370acd33bc5465f9b4e000c4d98111f26cfc3371f96246bb00b23ed4da5aeb40		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 597 bytes
vbaProject_00.bin
2a9684ce0fbea8e867993085dae6eb98b9e93d35927bff1ef561270c17614816		 vba-project OOXML VBA project: ppt/vbaProject.bin 17408 bytes

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