Amphitryon Office (OLE) malware analysis — malicious · 302feabf564340c1

MALICIOUS

Office (OLE)

140.0 KB Created: 2020-10-15 11:18:00 Authoring application: Microsoft Office Word

MD5: c707f36b8c800a4dfbfba86cf1bd5533 SHA-1: 046c83f64957e77c7f2db96008e89016dab7cf4b SHA-256: 302feabf564340c14d1f92d13de41df335b09e8258375d7b778f67a69f57459e

240 Risk Score

Malware Insights

Amphitryon · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The file is identified as malicious by ClamAV with the signature Doc.Downloader.Amphitryon-9778217-0. Static analysis reveals the presence of VBA macros, specifically a Document_Open macro that utilizes CreateObject for execution. This indicates the macro is designed to run automatically when the document is opened, likely to download and execute a secondary payload. The obfuscated document body content does not provide further clues to the specific lure.

Heuristics 7

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.
Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
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.

Filename	Kind	Source	Size
`macros.bas` `ceb2cd1feb993343b43c1a562f1511ffad0916ca06ac60b4283e0a65886cd4c5`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	10625 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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