Office (OLE) malware analysis — malicious · af77b6d2c8b4ac5d

MALICIOUS

Office (OLE)

153.0 KB Created: 2020-09-14 22:09:00 Authoring application: Microsoft Office Word

MD5: 0c83a982cbe6c4d4d2c9330a20626d01 SHA-1: b7d04cced33d245d489d96cbf77aef9b2d18c450 SHA-256: af77b6d2c8b4ac5dd458b68e927c7ff84ed97c517498254d74eec800e9699b1a

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is identified as malicious by ClamAV and contains VBA macros. The 'Document_Open' macro is present and utilizes 'CreateObject', indicating an attempt to execute code upon opening. The presence of 'macros.bas' further confirms the macro-based nature of the threat. The script appears to construct a command involving 'wscript.shell' and 'regsvr32', suggesting it aims to download and execute a second-stage payload. The exact URL or command constructed is obfuscated within the script.

Heuristics 7

ClamAV: Doc.Malware.Generic-9760527-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Generic-9760527-0
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` `bf2dc6e4793502154f28a14458af4f5198ccc48932a5641a4c34f7f1fcdc0c82`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	18582 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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