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

Static analysis result for SHA-256 6c1b1b0dddaedfa9…

MALICIOUS

Office (OLE) / .DOC

190.0 KB Created: 2010-06-12 14:41:00 Authoring application: Microsoft Office Word
MD5: 3f4b1d316fccbff2b84cd205a10462d2 SHA-1: ed9c97c111c87e88e9607056e5e4d5d0c2cf81ef SHA-256: 6c1b1b0dddaedfa9bdc552ecbced5214a9faef0f96aa384690952cd5a4d899fb
442 Risk Score

Malware Insights

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

The sample is a malicious Microsoft Word document exploiting CVE-2007-3899 to drop and execute a payload. The OLE package contains an embedded PE executable and a script designed to download and execute a second-stage payload from http://www.firewallleaktester.com. The presence of CreateProcess, ShellExecute, LoadLibrary, and GetProcAddress API calls further supports the execution of external code.

Heuristics 10

  • 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.
  • 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
  • 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.firewallleaktester.com
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_office_00003263.exe
59dca7bd8a2e27dcd5bfb7cd2c9c4dc6c7711220969f90412d684c05fc1d2c0f		 embedded-pe Office MZ+PE at offset 0x3263 181661 bytes
ole10native_00.bin
e96a6048e994182d214cb9d299a77abcaa3f66df7c4ff8c2d3d63602e5a01cf8		 ole-package OLE Ole10Native stream: ObjectPool/_1337876823/Ole10Native 173157 bytes

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