Office (OLE) / .DOC malware analysis — malicious · 4351ed3fc65e57ae

MALICIOUS

Office (OLE) / .DOC

707.5 KB Created: 2020-09-24 03:36:00 Authoring application: Microsoft Office Word

MD5: 2cdd1f0cdbeac5f59dbb3409b723eea7 SHA-1: 7f9dfaf174d5ca46f9a27fef751654edb101f6b3 SHA-256: 4351ed3fc65e57ae9035ae007b5832adf5a6806acb94045802a9126c475bd59e

388 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File T1106 Native API T1071.001 Web Protocols

The file is a malicious Microsoft Word document containing VBA macros. Heuristics indicate the use of APIs such as CreateProcess, VirtualAlloc, WriteProcessMemory, and CreateRemoteThread, suggesting the macro attempts to inject and execute code. The presence of a VBA auto-execution trigger (Workbook_Open) further supports this. The ClamAV detection 'Doc.Macro.Injection-6355574-0' confirms its malicious nature. The extracted artifact 'macros.bas' is likely the malicious VBA code.

Heuristics 11

Reference to WriteProcessMemory API critical SC_STR_WRITEPROCESSMEMORY

Reference to WriteProcessMemory API
Reference to CreateRemoteThread API critical SC_STR_CREATEREMOTETHREAD

Reference to CreateRemoteThread API
ClamAV: Doc.Macro.Injection-6355574-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Macro.Injection-6355574-0
Heap-spray pattern detected high SC_HEAP_SPRAY

Repeated 0x41 (A) bytes found
Reference to CreateProcess API high SC_STR_CREATEPROCESS

Reference to CreateProcess API
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
Reference to VirtualProtect API medium SC_STR_VIRTUALPROTECT

Reference to VirtualProtect API
VBA project contains no executable statements low OLE_VBA_MACROS

Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.
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` `4639af25a7331788bbf3ac2996df3b4845bf577eccea9e77424290e30ebbeed0`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	467582 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1450 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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