Office (OLE) / .DOCX malware analysis — malicious · 774d0427cd607b1c

MALICIOUS

Office (OLE) / .DOCX

179.5 KB Created: 2020-03-05 21:25:00 Authoring application: Microsoft Office Word

MD5: 1c4e4403e408c153c4f7dfd7813ed11a SHA-1: e494d8ed317c0d26a99dcaf5d49ab33ae26b9b7c SHA-256: 774d0427cd607b1c09131cc277a68c9edd7cf01499d356bcb1ef4a08e6fc322a

180 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a Microsoft Office document containing VBA macros, specifically an AutoOpen macro that utilizes GetObject. This indicates an attempt to execute malicious code upon opening. The presence of VBA macros and the AutoOpen technique strongly suggest a macro-based malware delivery. The extracted artifact 'macros.bas' is the source of these malicious macros. The document body is heavily obfuscated and does not provide clear textual lures.

Heuristics 6

AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen macro
GetObject call high OLE_VBA_GETOBJ

GetObject 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` `641511dd67d093d3861ddd41e11d3a179d5cb02c24e123e86bc87aac7a2d0d3c`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	52429 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 224 Chr/ChrW string-construction calls.

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