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

Static analysis result for SHA-256 4ca95525ef978bec…

MALICIOUS

Office (OLE) / .DOC

548.0 KB Created: 2009-12-11 11:47:44 Authoring application: Advanced Installer 16.2 build 436ecd62
MD5: 8bf978f9b7b3a6dd0720f0c61d9158f0 SHA-1: ac92b94a74f70b6c0eaeb9356fac7b48bf0d41aa SHA-256: 4ca95525ef978bec4ec4d610d80fc591e70fd3f624ed5eb3a97a9c29bdcdbb4f
320 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The sample is a Microsoft Office document containing an embedded PE executable. Heuristics indicate references to CreateProcess, ShellExecute, LoadLibrary, and GetProcAddress APIs, suggesting the execution of external code. The embedded executable, 'embedded_office_00011a00.exe', is the primary indicator of malicious intent, likely serving as a downloader or initial payload.

Heuristics 9

  • Embedded PE executable critical OLE_EMBEDDED_EXE
    MZ/PE header found inside document — possible embedded executable
  • PEB access via FS segment (x86) high SC_PEB_ACCESS
    PEB access via FS segment (x86)
  • 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 Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Reference to LoadLibrary API high SC_STR_LOADLIBRARY
    Reference to LoadLibrary API
  • Reference to GetProcAddress API high SC_STR_GETPROCADDRESS
    Reference to GetProcAddress API
  • Suspicious extracted artifact medium 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.
  • 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://t2.symcb.com0
    • http://tl.symcd.com0&
    • http://s.symcd.com06
    • http://ts-ocsp.ws.symantec.com0
    • http://t1.symcb.com/ThawtePCA.crl0
    • http://tl.symcb.com/tl.crl0
    • https://www.thawte.com/cps0/
    • https://www.thawte.com/repository0W
    • http://tl.symcb.com/tl.crt0
    • https://www.advancedinstaller.com
    • https://d.symcb.com/cps0%
    • https://d.symcb.com/rpa0
    • http://s.symcb.com/universal-root.crl0
    • https://d.symcb.com/rpa0@
    • http://ts-crl.ws.symantec.com/sha256-tss-ca.crl0
    • http://ts-aia.ws.symantec.com/sha256-tss-ca.cer0(

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_office_00011a00.exe
a34938176d20983d15e1aed8100a2e6072f315b9b689e5193ee236cf4b68a088		 embedded-pe Office MZ+PE at offset 0x11A00 488960 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 18 shell/COM execution token(s).

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