Office (OLE) / .DOC malware analysis — malicious · 97291d050f427233

MALICIOUS

Office (OLE) / .DOC

224.0 KB Created: 2020-11-04 19:31:00 Authoring application: Microsoft Office Word

MD5: 0b35de01084884b466dd6b55116cd866 SHA-1: 92161faa23d8d6609414d34950cf926b6f6ad850 SHA-256: 97291d050f42723384c4b3cd3cce46fb001411d93568ccf574cca1d22e14fcc8

300 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File T1105 Ingress Tool Transfer T1055 Process Injection

The sample is a malicious OLE document containing a VBA macro. The macro is configured to auto-execute upon opening, indicated by the 'AutoOpen' and 'CreateObject' firings. It also references Windows API calls such as CreateProcess, ShellExecute, VirtualAlloc, and WriteProcessMemory, suggesting it attempts to download and execute a second-stage payload. The document body uses a COVID-19 lure to entice the user. No specific family could be identified.

Heuristics 9

Reference to WriteProcessMemory API critical SC_STR_WRITEPROCESSMEMORY

Reference to WriteProcessMemory API
Reference to CreateProcess API high SC_STR_CREATEPROCESS

Reference to CreateProcess API
Reference to ShellExecute API high SC_STR_SHELLEXEC

Reference to ShellExecute API
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.
Reference to VirtualAlloc API medium SC_STR_VIRTUALALLOC

Reference to VirtualAlloc API
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` `d391ffbbe84f1e0c6457dd3e7085babf757a1c93cd0c2e2f7771582f51abac17`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	28986 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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