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

Static analysis result for SHA-256 6655026d703e9efb…

MALICIOUS

Office (OLE) / .DOC

1000.5 KB Created: 2020-06-29 12:07:00 Authoring application: Microsoft Office Word
MD5: 603bebc04d98f9a62b4201c6d46f9ba6 SHA-1: 345fb60733a9cb98d9ec051ec3d33abf721477fc SHA-256: 6655026d703e9efb9805807cb20b7d8284ff91979f5b746c32a965ca1a268ca4
250 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer T1204.002 Malicious File

The sample is a malicious Office document containing VBA macros. The 'autoopen' macro is designed to execute upon opening, and it utilizes 'CreateObject' to instantiate 'scripting.filesystemobject' and 'wscript.shell'. These objects are then used to download and execute payloads from the URLs https://bentorium.com/vapirum409.dll and https://bentorium.com/coclew.dll, indicating an Ingress Tool Transfer attack pattern.

Heuristics 8

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject 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 https://bentorium.com/vapirum409.dll
    • https://bentorium.com/coclew.dll
    • http://www.w3.org/1999/XSL/Transform
    • http://schemas.openxmlformats.org/drawingml/2006/main
    • http://schemas.openxmlformats.org/officeDocument/2006/bibliography
    • http://schemas.openxmlformats.org/officeDocument/2006/customXml

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
9efa1b686871f8637aca4c8c9175d02d1d43d4451175bb4271e2616f98fb5175		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10189 bytes

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