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

Static analysis result for SHA-256 106a8f13042b1667…

MALICIOUS

Office (OLE) / .DOC

657.0 KB Created: 2020-06-23 12:49:00 Authoring application: Microsoft Office Word
MD5: 0db9656d2f72ff3e4cefd606b1209828 SHA-1: 85324a007e0165660d2c227ef22683d8a824181d SHA-256: 106a8f13042b1667f308341f92f0ec0a867b129e54e4f225475965a603a68813
250 Risk Score

Malware Insights

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

The sample contains VBA macros with an AutoOpen subroutine that executes a Shell() call. This script attempts to create a FileSystemObject and then calls a function that appears to download and execute a payload from one of the embedded URLs. The use of AutoOpen and Shell() indicates a malicious intent to execute arbitrary code.

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://marutoba.com/frt.dll
    • https://caranatrium.com/vertusa.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
7e5ed2060aa16c660935f836595d4ded2c4333e86f127954e7939d3042f0266e		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 15500 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.