Powload — Office (OLE) / .DOC malware analysis

Static analysis result for SHA-256 ced50cb655eedfb1…

MALICIOUS

Office (OLE) / .DOC

144.8 KB Created: 2019-04-26 10:18:00 Authoring application: Microsoft Office Word
MD5: 10ab8fd2a532c9132807a4f34462a936 SHA-1: dae4700465d2173a134a6e5adccc6c967cb1a506 SHA-256: ced50cb655eedfb161c2e83600ffec242afd9a05f0fcde562fba99e4dca725dc
260 Risk Score

Malware Insights

Powload · confidence 95%

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

The sample contains VBA macros, specifically an AutoOpen macro that utilizes GetObject and WMI (Win32_Process.Create) to launch a process. This is a common technique for downloading and executing second-stage payloads. ClamAV detection confirms this as Doc.Downloader.Powload-6956387-0, indicating a downloader family. The embedded URL was benign, but the heuristic firings strongly suggest malicious intent.

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.Powload-6956387-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Powload-6956387-0
  • 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
f3a59ef8f530cb4477f7655b9d5295c49c2846049b13edefd0afc819372e62af		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 39989 bytes

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