Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 9d5d8db27209b97a…

MALICIOUS

Office (OLE) / .DOC

238.5 KB Created: 2022-10-10 22:41:00 Authoring application: Microsoft Office Word First seen: 2022-10-11
MD5: ef238d7097784d65bef908d7e6758342 SHA-1: a54910f3c5a1a13c5e8ffbf109bc974ec9371b73 SHA-256: 9d5d8db27209b97a221a975134e8ba92eaa8b88e298b602bad49d385b8ce2066
422 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer T1059.003 Windows Command Shell

The sample contains a VBA macro with an AutoOpen subroutine that utilizes WScript.Shell to download a file from 'https://namanovin.ir/file/file.exe' and execute it. This indicates a dropper functionality, aiming to fetch and run a secondary payload.

Heuristics 10

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • VBA downloads and writes a file to disk critical OLE_VBA_HTTP_DROP_EXEC
    VBA reads an HTTP response body and writes it to disk (ADODB.Stream SaveToFile). Combined with the auto-exec/Shell paths this is a download-drop dropper even when the COM ProgIDs are built dynamically to evade keyword scanning.
  • ClamAV: Doc.Dropper.Agent-6412232-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6412232-1
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • 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.
  • 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://namanovin.ir/file/file.exe
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
921c9861ed35860d2fdb59cac4fb3eebeebaa3b9a3754a414620452b6a23bc7b		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 99235 bytes

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