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

Static analysis result for SHA-256 a1f83e2e809cb6ea…

MALICIOUS

Office (OLE) / .DOC

88.6 KB Created: 2018-11-26 12:33:00 Authoring application: Microsoft Office Word
MD5: 0ef5ed6cd6b1917807ad2ed87e377540 SHA-1: f712ec41af23cdd6f8355eceaae45e5349cc0ff1 SHA-256: a1f83e2e809cb6ea82a9a0b6f6f054a126c0a5882c5994e9184527780dd1fc42
240 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell

This document contains VBA macros that are designed to execute obfuscated commands via cmd.exe. The primary intent appears to be downloading and executing a second-stage payload from a remote source, as indicated by the reconstructed URL 'http://schemas.openxmlformats.org/drawingml/2006/main'. The high-severity heuristic firings, including suspicious cmd.exe invocation and VBA p-code auto-execution, strongly support this malicious activity.

Heuristics 7

  • ClamAV: Doc.Malware.Powload-6813870-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Powload-6813870-0
  • Suspicious cmd.exe invocation with execution flag high SC_STR_CMD
    Suspicious cmd.exe invocation with execution flag
  • 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
7847b43fba7dcf9cfb7c0fc55c9418156fc1959f77e921bc0c4d76dce6a93b57
vba-macro oletools.olevba.extract_macros (decoded VBA source) 6097 bytes