Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 96f815abb422bb75…

MALICIOUS

Office (OLE)

52.0 KB Created: 2021-07-05 06:04:00 Authoring application: Microsoft Office Word
MD5: 900e892c8151f0f59a93af1206583ce6 SHA-1: aea15a7ce95761a556199f5a774be293a82c17c2 SHA-256: 96f815abb422bb75117e867384306a3f1b3625e48b81c44ebf032953deb2b3ff
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1059.003 Windows Command Shell

The sample contains a VBA macro that executes upon opening the document. This macro writes a batch file to disk which then uses PowerShell to download and execute a second-stage payload from the URL http://1221.site/15858415841/0407.exe. The batch file is then executed, initiating the download and execution chain.

Heuristics 6

  • ClamAV: Doc.Macro.UA471-9938198-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Macro.UA471-9938198-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open 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 http://1221.site/15858415841/0407.exe
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
4f4317b41420086432c067d20da214434e774173183f6a0985b34939ecaae852		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 891 bytes

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