Office (OOXML) / .DOCM static analysis report

Static analysis result for SHA-256 71a8e488b3d142bf…

SUSPICIOUS

Office (OOXML) / .DOCM

239.9 KB Created: 2021-05-25 12:09:00 UTC Authoring application: Microsoft Office Word 12.0000
MD5: cb27d0bd9a97e053f3fbfcf4bba8b8fc SHA-1: abc72dd17e19f06a3724faf5452bd25a42d0f7de SHA-256: 71a8e488b3d142bfdfcc4092ac35cf32e7d5e55b68acd262d16707f6a09f9321
40 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059 Command and Scripting Interpreter T1105 Ingress Tool Transfer T1053.005 Scheduled Task/Job: Scheduled Task T1053 Scheduled Task/Job T1204.002 Malicious File: User Execution

The sample contains a VBA macro that executes upon opening the document. This macro, GushaisafileLeadr, creates a directory '%ALLUSERSPROFILE%\Dklhyrdas\' and writes obfuscated byte data to a file named 'irvrmjavhica' within that directory. The script also uses CreateObject("Shell.Application") and appears to be preparing to execute further code, indicating a downloader or dropper functionality.

Heuristics 8

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • 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 project inside OOXML medium OOXML_VBA
    Document contains a VBA project — VBA macros present
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
  • 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://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/math
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
    • http://schemas.openxmlformats.org/wordprocessingml/2006/main
    • http://schemas.microsoft.com/office/word/2006/wordml
  • Macro capabilities present but unconfirmed info MACRO_CAPABILITY_UNCORROBORATED
    The document's VBA exposes execution capabilities (Shell/WScript/CreateObject/auto-exec) but nothing corroborates malicious intent — no obfuscation, memory-exec primitive, download+exec chain, encoded payload, LOLBin, DDE, AV hit, or suspicious URL. The verdict was capped at 'suspicious' so legitimate macro-heavy business documents are not flagged malicious on capability presence alone.

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
a4e3634036f6d179b1388d70184a8730ca7d2150df98f4f61f70e5e2f435c076		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 4760 bytes
vbaProject_00.bin
68f1c125b7f1f6a44642d8cbc21932397458235c7c1ba6a8fd1c98a3752f5d99		 vba-project OOXML VBA project: word/vbaProject.bin 941056 bytes

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