Office (OLE) / .DOC malware analysis — malicious · 3bd5892cdc82dc45

MALICIOUS

Office (OLE) / .DOC

60.5 KB Created: 2022-04-20 02:06:00 Authoring application: Microsoft Office Word First seen: 2022-04-20

MD5: 090e1dfdcbf2185788ea14cd113cc39f SHA-1: 6346e143368edbb5a23c8eea9698be2c266311b3 SHA-256: 3bd5892cdc82dc4576eaf2735edb57182ae8b91c8067be305d4e801197d390cc

182 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File T1071.001 Web Protocols

The sample contains a VBA macro that is automatically executed via the AutoOpen subroutine. This macro utilizes the CreateObject function to instantiate the Windows Installer service and then calls the InstallProduct method. The InstallProduct method is used to download and execute a Windows Installer package from the URL https://filebin.net/rf43v6qzghbj7h7b/TRY.msi. This indicates a downloader or dropper functionality, aiming to install further malicious components.

Heuristics 6

AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen 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 https://filebin.net/rf43v6qzghbj7h7b/TRY.msi�
- https://filebin.net/rf43v6qzghbj7h7b/TRY.msi
- http://schemas.openxmlformats.org/drawingml/2006/main
- https://docs.microsoft.com/en-us/windows/win32/msi/action

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `5ca21e16d63b78895f5db30799c7efb7b845bccb795d84936794669df04e7f82`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	626 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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