Amphitryon — Office (OLE) malware analysis

Static analysis result for SHA-256 5ab7feb155d115d7…

MALICIOUS

Office (OLE)

141.0 KB Created: 2020-10-15 11:18:00 Authoring application: Microsoft Office Word
MD5: 37c6567c48b651f97b1c3f90a4073aac SHA-1: 05e2301058054e0f91082607bea6031a45cc9303 SHA-256: 5ab7feb155d115d799a41194045fc38c07b387a68020f3a94e1cbc64c18d4893
202 Risk Score

Malware Insights

Amphitryon · confidence 95%

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

The sample is a malicious Microsoft Office document containing VBA macros. The 'Document_Open' macro is present and uses 'CreateObject', indicating an attempt to execute code. ClamAV detection confirms this as 'Doc.Downloader.Amphitryon-9778217-0', suggesting it's a downloader. The VBA script itself is heavily obfuscated but the presence of 'CreateObject' and the ClamAV signature strongly suggest a downloader functionality.

Heuristics 6

  • ClamAV: Doc.Downloader.Amphitryon-9778217-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Amphitryon-9778217-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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 macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
ceb2cd1feb993343b43c1a562f1511ffad0916ca06ac60b4283e0a65886cd4c5		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10625 bytes

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