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

Static analysis result for SHA-256 c7dd490adb297b7f…

MALICIOUS

Office (OLE) / .DOC

1.49 MB Created: 2022-03-18 03:43:00 Authoring application: Microsoft Office Word First seen: 2022-03-28
MD5: 341610a5a0cc430f99f9f9bd694b04a9 SHA-1: 9b520d709cee6c57fbaba38f38a667b0b0691e86 SHA-256: c7dd490adb297b7f529950778b5a426e8068ea2df58be5d8fd49fe55b5331e28
222 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Service Execution: Visual Basic T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious File Execution: User Execution

The sample is a malicious Office document containing a VBA macro. The macro is configured to auto-execute via Document_Open and utilizes CreateObject and ShellExecute, indicating an intent to run external commands. This suggests the macro is designed to download and execute a second-stage payload. No specific family could be identified, but the techniques used are common for initial access and payload delivery.

Heuristics 7

  • Reference to ShellExecute API high SC_STR_SHELLEXEC
    Reference to ShellExecute API
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open 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.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/photoshop/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://ns.adobe.com/tiff/1.0/
    • http://ns.adobe.com/exif/1.0/
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
3ea71a8f84bf9d4da9eef1f86b3ee1792de19a07c412b7f908a963e7669d553c		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 44161 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.
ole10native_00.bin
536dd0389f7192708f7ba16de03e427ada70fa1e6238a2bd2b0b06009e09b840		 ole-package OLE Ole10Native stream: ObjectPool/_1709090961/Ole10Native 43560 bytes

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