Office (OLE) / .DOCX malware analysis — malicious · cae404af78e1ccf5

MALICIOUS

Office (OLE) / .DOCX

159.9 KB Created: 2020-12-28 20:57:00 Authoring application: Microsoft Office Word

MD5: f8fca602a7ed8beb77c5cc90709e3d0c SHA-1: 172063f09dd25d0e74164f626236fc70828580a4 SHA-256: cae404af78e1ccf5ea32dbb545812c3f072d88a53b7489af336ef649539ea4c0

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The critical ClamAV detection and high-severity heuristics for VBA macros, including auto-execution and CreateObject calls, strongly indicate malicious intent. The presence of a 'Document_Open' macro suggests an attempt to automatically execute code upon opening the document. While the specific family is not definitively identified, the pattern is consistent with a downloader. The extracted 'macros.bas' file is a key artifact.

Heuristics 7

ClamAV: Doc.Downloader.EmotetRed02224-9938637-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.EmotetRed02224-9938637-0
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` `fc28b021e7c13690bd05b8fda29444b887d0bad8d106819ca318299d8abb8857`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	6085 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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