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

Static analysis result for SHA-256 19205c6f2db8cdb8…

MALICIOUS

Office (OLE) / .DOC

387.0 KB Created: 2021-06-01 11:43:00 Authoring application: Microsoft Office Word
MD5: 7cfa349a65b99f4a34627d46a357ceff SHA-1: c1e6c560b20dd7d8fde9204ce1f0550fdc47258c SHA-256: 19205c6f2db8cdb8d8ecf9534ad97aa686cb336ba521cb9c56a7150ebce8d977
362 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1105 Ingress Tool Transfer

The Document_Open VBA macro uses CreateObject("wscript.shell") to execute a command. This command uses Start-BitsTransfer to download a file from http://scaladevelopments.scaladevco.com/17/sg-3nlJH.ex to C:\Users\Public\Documents\layinvestment.ex and then executes it. This indicates the document is a downloader for a second-stage payload.

Heuristics 9

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • Obfuscated VBA Shell command with URL critical OLE_VBA_OBFUSCATED_SHELL_URL
    VBA macro invokes Shell with command text assembled through decoder or string-manipulation functions and includes a URL. This is a high-confidence downloader/dropper pattern, stronger than Shell or URL evidence on their own.
  • 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://scaladevelopments.scaladevco.com/17/sg-3nlJH.ex
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
7b99271cd99ce32b063d422539c80ebd2b4713a54c6bfefa87e88dc73406ec98		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 814 bytes

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