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

Static analysis result for SHA-256 2fbff281b9d4d240…

MALICIOUS

Office (OLE) / .DOC

543.0 KB Created: 2020-12-08 10:58:00 Authoring application: Microsoft Office Word
MD5: 14450c99698f1725a1933879d104c404 SHA-1: 5fa27c4c455d168bf0efced37869b8f840d3dc4d SHA-256: 2fbff281b9d4d240ef5a800c08cf26d4d4944e73227860a7c4afeb3b11615238
680 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer T1204.002 Malicious File T1027 Obfuscated Files or Information

The sample is a malicious OLE document containing VBA macros. The Document_Open macro utilizes the Shell() function to execute an embedded PE executable. This executable was detected by ClamAV as a keylogger, suggesting a credential theft or information-gathering purpose. The presence of Ole10Native and the embedded PE executable strongly indicate a dropper functionality.

Heuristics 17

  • 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.
  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Embedded PE executable critical OLE_EMBEDDED_EXE
    MZ/PE header found inside document — possible embedded executable
  • ClamAV: Doc.Dropper.Hancitor-9845854-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Hancitor-9845854-0
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • x86 GetPC stub (CALL $+5; POP ECX) high SC_GETPC_CALL
    x86 GetPC stub (CALL $+5; POP ECX)
  • PEB access via FS segment (x86) high SC_PEB_ACCESS
    PEB access via FS segment (x86)
  • 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
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Suspicious extracted artifact high 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.
  • Reference to VirtualProtect API medium SC_STR_VIRTUALPROTECT
    Reference to VirtualProtect API
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
9c36b31ca7bf85c0372901c007ef262055cef8562ee8fd22566dc38dd496113e		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3660 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.
embedded_office_00021e71.exe
e039cce768d4892035914119ec890ca34d0095f7e9546836af7caae7e5a025e5		 embedded-pe Office MZ+PE at offset 0x21E71 417167 bytes
Detection
ClamAV: Win.Keylogger.Cridex-9807692-0
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.
ole10native_00.bin
141d06ffd8d331ce699e81a10ba888c63d4e2a09d0afd96b424966e7505aece8		 ole-package OLE Ole10Native stream: ObjectPool/_1668908711/Ole10Native 378677 bytes

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