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

Static analysis result for SHA-256 69ac0d42dce05bcd…

MALICIOUS

Office (OLE) / .DOC

183.5 KB Created: 2021-05-10 21:58:00 Authoring application: Microsoft Office Word
MD5: 49ad6fb2dca5d329f6c458ebb172f35f SHA-1: 814e7ee66ade2d0b7eeca2f4c655709939b31ac9 SHA-256: 69ac0d42dce05bcd01273fc11a1a73fa7d6ab446ef129677940a328aa8f1e4d2
182 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer

The sample contains a VBA macro that executes upon opening the document. This macro constructs and executes a PowerShell command to download a file from 'http://31.210.20.6/w2/fgmq.ex' and save it as 'C:\Users\Public\Documents\nationalartist.ex', then immediately executes the downloaded file. The use of CreateObject and wscript.shell indicates the intent to leverage system scripting capabilities for payload delivery.

Heuristics 6

  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • 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://31.210.20.6/w2/fgmq.ex
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
9fd2518935d1ebd7ed9b840244bef78c5374b5ed212d3b124ddb9d8ff9e9302f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 889 bytes

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