Office (OLE) / .DOC malware analysis — malicious · 1f33a3b176c7062a

MALICIOUS

Office (OLE) / .DOC

86.5 KB Created: 2018-08-27 18:24:00 Authoring application: Microsoft Office Word

MD5: 2d2b0c7b4325da2fa989ea8ac308697b SHA-1: 5f182251f6c4bb194b780737445816745343fdd1 SHA-256: 1f33a3b176c7062a63b392a64c21e5c05bcd0c920a363bbcde4a1a0bc9ad2b8d

260 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a malicious Microsoft Word document containing a VBA macro. The 'AutoOpen' macro is present and uses a 'Shell()' call, indicating it is designed to execute arbitrary code upon opening. This macro likely downloads and executes a second-stage payload, as suggested by the ClamAV detection name 'Doc.Downloader.Valyria-6665585-0'. The presence of a Shell() call and auto-execution tokens strongly suggests a downloader attack pattern.

Heuristics 7

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
ClamAV: Doc.Downloader.Valyria-6665585-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Valyria-6665585-0
AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen macro
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` `3ec07237170d3363d0cc66314b458acbeafc6672dea3cb5f4174eed32aafca0e`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	9760 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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