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

Static analysis result for SHA-256 6b28a0252d081222…

MALICIOUS

Office (OLE) / .DOC

2.29 MB Created: 2019-02-26 06:39:00 Authoring application: Microsoft Office Word
MD5: c7931fa4c144c1c4dc19ad4c41c1e17f SHA-1: 91510b97f764296b16fc88f0195cec6e6f1604af SHA-256: 6b28a0252d0812221e1dcfaf06017ed96595bae2c59dd7ba03a41093faeca1d1
250 Risk Score

Malware Insights

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

The sample contains VBA macros, including an AutoOpen macro, which are designed to execute automatically upon opening. The script utilizes CreateObject and GetObject calls, indicative of malicious activity. The primary function of the VBA code appears to be the obfuscated download and execution of a secondary payload, likely from a remote source, as suggested by the heuristic firings.

Heuristics 8

  • ClamAV: Doc.Dropper.Agent-6946337-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6946337-0
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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
  • 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://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/photoshop/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
    • http://www.iec.ch
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
0c5fec5a08ee74f46f9bee807437841e95875d726f6f7932401e29ba70bd30f7		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 24027 bytes

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