Office (OLE) / .DOC malware analysis — malicious · d4e046174d7e6c59

MALICIOUS

Office (OLE) / .DOC

205.7 KB Created: 2019-12-19 21:05:00 Authoring application: Microsoft Office Word

MD5: cdce801345ce090fe4f3336ca9ceb039 SHA-1: 65934ad924f7532eb4f6e4d134d1ef78a41a7b7c SHA-256: d4e046174d7e6c59f8fe7121699d4ecc001431e12ab38a191ce6a4df3ac93498

280 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a malicious OLE document containing VBA macros. The critical heuristic 'OLE_VBA_USERFORM_HIDDEN_COMMAND_STAGER' indicates the use of a hidden UserForm property to execute a command stager. This stager likely leverages VBA's ability to create objects and execute code, as suggested by the 'OLE_VBA_CREATEOBJ' and 'OLE_VBA_GETOBJ' firings. The 'Document_Open' macro is the auto-execution entry point. The primary IOC is the extracted 'macros.bas' file, which contains the malicious VBA code.

Heuristics 8

VBA UserForm hidden-property command stager critical OLE_VBA_USERFORM_HIDDEN_COMMAND_STAGER

VBA auto-exec macro creates a COM object from a decoded variable and reconstructs command text through Split/Join and hidden UserForm properties such as ControlTipText, Tag, Pages, or HelpContextId. This is a high-confidence macro downloader/loader shape seen in the reviewed OLE set, but it is not an Office CVE exploit primitive.
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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` `38cf4d50ecacb7d0bb242c2364b2b05e7317bc4599d558f8ffd0427ddb2f8fe3`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	13392 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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