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

Static analysis result for SHA-256 f66e562ad5700775…

MALICIOUS

Office (OLE) / .DOC

549.0 KB Created: 2009-12-11 11:47:44 Authoring application: Advanced Installer 16.2 build 436ecd62
MD5: c9e5ddc25b5651363a41fb89d94aa3d3 SHA-1: 6ca8d8378ef9074d0d28aebcbbc07453f57d2ee6 SHA-256: f66e562ad5700775d82a48fee9cabbecef20d6f3c91958c767041719402bd01f
320 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File T1105 Ingress Tool Transfer T1059.003 Windows Command Shell T1059.005 Visual Basic

The sample is a malicious OLE document containing an embedded PE executable. Heuristics indicate the use of APIs like CreateProcess and ShellExecute, suggesting the embedded executable is intended to be launched. The presence of an embedded executable is a strong indicator of a dropper or initial access mechanism. No specific family could be identified.

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
b4b27a0db66b6eab66f6ade4e9ee1dae75fd297ea7f55ddf2780c905931fec8a		 embedded-pe Office MZ+PE at offset 0x11A00 489984 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 16 shell/COM execution token(s).

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