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

Static analysis result for SHA-256 101a5477169067b0…

MALICIOUS

Office (OLE) / .DOC

69.5 KB Created: 2022-04-04 11:42:00 Authoring application: Microsoft Office Word First seen: 2022-04-05
MD5: 8698a9ea35b8079c09b383c67a0eb0ad SHA-1: 18e19652397825e8b3c4dc3091930bda086e8ce5 SHA-256: 101a5477169067b0d4df475dca5ed8ae2c99b3916664b6d32aeb5113541ee5be
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample is a malicious Word document containing VBA macros. The AutoOpen macro executes a CreateObject call to the Windows Installer service, which then attempts to download and install an MSI package from the URL 'https://filebin.net/0hcps6l97xnwswv6/OPOR.msi'. The document body attempts to lure the user into enabling macros by claiming compatibility issues with older versions of Word.

Heuristics 6

  • 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.
  • NOP-equivalent sled detected medium SC_NOP_EQUIV_SLED
    Long run of 0x41 bytes
  • 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 https://filebin.net/0hcps6l97xnwswv6/OPOR.msi
    • https://docs.microsoft.com/en-us/windows/win32/msi/action
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
ce3f8bb03a802906570cad9b9cedc573bf066dd2a9f3896c9ee6931272d0d900		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 627 bytes
ole10native_00.bin
21a5ba8afcfa78313eb1cda9bbc9dc76c4cb8b2ce843a4962140084a58e72849		 ole-package OLE Ole10Native stream: ObjectPool/_1710587586/Ole10Native 4516 bytes

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