Amphitryon Office (OLE) malware analysis — malicious · 8a18bd4ad8eba831

MALICIOUS

Office (OLE)

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

MD5: 7c7b95a412a3c6d15c51214f5e46580a SHA-1: 381c5977642da8e4a48178aeccd2add5ee99e1ba SHA-256: 8a18bd4ad8eba8310bcd422c1ba2612b6ad2adbcbdf5fb76408f85fbf496b5be

240 Risk Score

Malware Insights

Amphitryon · confidence 95%

MITRE ATT&CK

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

The critical ClamAV detection and high-severity heuristics for OLE_VBA_MACROS, OLE_VBA_DOCOPEN, OLE_VBA_CREATEOBJ, and OLE_VBA_PCODE_AUTOEXEC_EXEC indicate that this Office document contains malicious VBA macros designed to execute automatically. The presence of the 'Amphitryon' family name in the ClamAV detection strongly suggests the malware family. The macros likely download and execute a second-stage payload, a common tactic for this type of downloader.

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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