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

Static analysis result for SHA-256 5e89b3857aeb3768…

MALICIOUS

Office (OLE) / .DOC

387.5 KB Created: 2021-04-27 22:48:00 Authoring application: Microsoft Office Word
MD5: b4dbe776fcb9f1e538200789c76dafa5 SHA-1: aae63575c7ef88bd9f9fa578a909a25f3ac3caed SHA-256: 5e89b3857aeb3768d4b91843094d4214a125ed6f8a4bffd922c9db42c9762fd3
222 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The sample contains a VBA macro that executes when the document is opened. This macro uses `CreateObject` to instantiate `wscript.shell` and then executes a PowerShell command. The PowerShell command is designed to download a file from 'http://scaladevelopments.scaladevco.com/13Z/IMG_0501_765_013.ex' and save it as 'C:\Users\Public\Documents\avoideast.ex', and then immediately execute it. This indicates a downloader or droppper functionality.

Heuristics 7

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/13Z/IMG_0501_765_013.ex
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
b9ce32016b3d315e2a9962e59f45f766aecb81d3365301dc724f04e2cf8536d7		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 901 bytes

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