Sagent — Office (OLE) / .DOC malware analysis

Static analysis result for SHA-256 ad23b779d4003171…

MALICIOUS

Office (OLE) / .DOC

201.2 KB Created: 2019-04-11 16:11:00 Authoring application: Microsoft Office Word
MD5: b49ec23ae25eb89fc6d22a671e518446 SHA-1: 943378824dfbc71795412f06b353c61c8ad7e58f SHA-256: ad23b779d4003171a8b5780144004d88e5b01c16e74b2d6ec91c2805f57e6da7
260 Risk Score

Malware Insights

Sagent · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1218.011 Signed Binary Proxy Execution: Rundll32 T1059.005 Visual Basic

The sample contains VBA macros, including an AutoOpen macro, which is a common delivery mechanism for malware. The critical heuristic 'OLE_VBA_WMI_PROCESS_CREATE' indicates that the macros attempt to launch a process using WMI. ClamAV identified the file as 'Doc.Downloader.Sagent-6938008-0', suggesting it functions as a downloader. The macros likely download and execute a second-stage payload.

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
94238437b5d1621890c14e77d8505c851ed21e6c4a98c3b3620d362c55b28e77		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 38978 bytes

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