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

Static analysis result for SHA-256 5afc684741548bd3…

MALICIOUS

Office (OLE) / .DOC

545.5 KB Created: 2009-12-11 11:47:44 Authoring application: Advanced Installer 16.2 build 436ecd62
MD5: 1fb62f0ff6c3f0362c319f805ad51285 SHA-1: 9a5db3d729bd87c8fb11553fe52ef5517263edd4 SHA-256: 5afc684741548bd3397741eec40f4a70aa358283d63ec608bc3ad49f7788ca2b
362 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer T1203 Exploitation for Client Execution

The sample is a malicious Office document containing an embedded PE executable, identified as 'embedded_office_00011a00.exe'. Heuristics indicate the use of CreateProcess and ShellExecute APIs, suggesting the document's intent is to execute this embedded payload. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic further implies the document may provide instructions for handling a password-protected archive, a common tactic to bypass gateway scanning before payload execution.

Heuristics 10

  • 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
  • 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
  • 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
65b80151452e93e30bb4767263f37e6739ad26c2adf06a0000d0715813c7935a		 embedded-pe Office MZ+PE at offset 0x11A00 486400 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 18 shell/COM execution token(s).

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