Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9d8d9f714cbf0f8b…

MALICIOUS

Office (OLE)

758.5 KB Created: 2017-11-07 06:58:00 Authoring application: Microsoft Office Word First seen: 2018-11-05
MD5: c86051072dd276a690cd0b88f36d6e9f SHA-1: 21b3cd76e3a63a27b8ec38121ae58ea8ce9bf694 SHA-256: 9d8d9f714cbf0f8b4a1d20632d426abe2e5523503d543df79a835fe00c47f526
582 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.001 PowerShell

The sample exploits CVE-2007-3899 to drop and execute a PE executable. The document body provides instructions for recovering NVR passwords, which involves executing commands in a shell, and explicitly mentions using PuTTY. The embedded executable and the lure to execute commands suggest a downloader or initial access payload. The embedded URLs, while marked benign, were associated with the dropped package.

Heuristics 14

  • CVE-2007-3899 — Microsoft Word malformed string memory corruption critical CVE likely CVE_2007_3899
    Word OLE document has the MS07-060 malformed-string exploit shape: a Word 97-family FIB points to a malformed DOP/string-table region with an abnormal INT_MAX run, inflated text counters, and exploit payload or Mdropper.Z campaign evidence.
  • OLE with Ole10Native — possible CVE-2026-21514 exploitation high CVE likely CVE_2026_21514
    Document contains a Word OLE object with Ole10Native plus executable, PE, or risky remote-link indicators. CVE-2026-21514 exploits OLE metadata validation; this stronger structure is treated as likely exploitation.
  • Embedded PE executable critical OLE_EMBEDDED_EXE
    MZ/PE header found inside document — possible embedded executable
  • Ole10Native package payload is a download-and-execute script critical OFFICE_PACKAGE_SCRIPT_DROPPER
    The OLE Package's embedded payload contains a script that hosts a shell (PowerShell/WScript/mshta), fetches a remote resource, and executes it — a download-and-run dropper. Embedding such a script inside an Office document via the Object Packager is a direct user-execution delivery technique (MITRE T1204.002), not a benign attachment.
  • Ole10Native package drops an auto-executable payload critical OFFICE_PACKAGE_RISKY_FILE
    OLE Package displayName or fullPath ends in a directly auto-executable extension (a runnable binary or a script the default shell host runs on double-click). Embedding such a payload inside an Office document has no benign authoring use — it is a malware-delivery dropper.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Reference to CreateProcess API high SC_STR_CREATEPROCESS
    Reference to CreateProcess API
  • Reference to ShellExecute API high SC_STR_SHELLEXEC
    Reference to ShellExecute API
  • Reference to LoadLibrary API high SC_STR_LOADLIBRARY
    Reference to LoadLibrary API
  • Reference to GetProcAddress API high SC_STR_GETPROCADDRESS
    Reference to GetProcAddress API
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Reference to VirtualAlloc API medium SC_STR_VIRTUALALLOC
    Reference to VirtualAlloc API
  • Reference to VirtualProtect API medium SC_STR_VIRTUALPROTECT
    Reference to VirtualProtect API
  • 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.chiark.greenend.org.uk/~sgtatham/putty/ Embedded OLE package script
    • http://schemas.microsoft.com/SMI/2005/WindowsSettingsEmbedded OLE package script
    • http://schemas.openxmlformats.org/drawingml/2006/mainIn document text (OLE body)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_office_0000486d.exe embedded-pe Office MZ+PE at offset 0x486D 758163 bytes
SHA-256: 35bf96b8a594d4ca16ffbea35084c187e28507402da1fc7926443949efe9082f
ole10native_00.bin ole-package OLE Ole10Native stream: ObjectPool/_1484465145/Ole10Native 495913 bytes
SHA-256: 898e905a11c94ee211fcd356333ca74e57d70162f7a45b3fcd39b1fe80803503

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