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

Static analysis result for SHA-256 7b250036a5d97bd4…

MALICIOUS

Office (OLE) / .DOC

196.4 KB Created: 2019-04-11 16:11:00 Authoring application: Microsoft Office Word
MD5: d9927602b490a3c7d0e5632d23857ca4 SHA-1: a37cb40281f2d4ca9bbe774f44aeab61c5334fa4 SHA-256: 7b250036a5d97bd4ea1deb958618023426b5b9a10a98da4f02beae13c60a02b5
262 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1059 Command and Scripting Interpreter

The sample contains VBA macros, including an AutoOpen subroutine, which is a common technique for executing malicious code upon opening a document. The critical heuristic 'OLE_VBA_WMI_PROCESS_CREATE' indicates the macro attempts to launch a process using WMI, specifically targeting 'Win32_Process'. This suggests the macro's purpose is to download and execute a secondary payload. The ClamAV detection further confirms its malicious nature.

Heuristics 7

  • VBA WMI Win32_Process launcher critical OLE_VBA_WMI_PROCESS_CREATE
    VBA macro builds or references a WMI moniker for Win32_Process and invokes .Create to start a command. This is a high-confidence macro execution chain that often hides the WMI class name through string concatenation or helper functions.
  • ClamAV: Doc.Downloader.Sagent-6938008-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Sagent-6938008-0
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
21ff7899dc55ef8a43ef18fa5970082080c35a144eeb58c8db529e600c1a2fe5		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 38840 bytes

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