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

Static analysis result for SHA-256 f1be37a12486b798…

MALICIOUS

Office (OLE) / .DOC

621.5 KB Created: 2020-11-19 12:57:00 Authoring application: Microsoft Office Word
MD5: e4da712966aafc609ffa18be7d2b7cc6 SHA-1: 26975ec1eb975af90ffeb149f1eeaa9c5911a43f SHA-256: f1be37a12486b79888a0e17aaa2c8430c2a11eb224483c60d21a36a46bb4ccfb
660 Risk Score

Malware Insights

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

The sample is a malicious Office document containing VBA macros. The AutoOpen macro is configured to execute an embedded PE executable. ClamAV detections indicate this is a dropper for Hancitor and Cridex, suggesting the embedded executable is a second-stage payload. The presence of ShellExecute, VirtualAlloc, VirtualProtect, LoadLibrary, and GetProcAddress API calls further supports the dynamic execution of malicious code.

Heuristics 17

  • Office EPRINT stream contains EMF object high CVE related OLE_EPRINT_EMF_OBJECT
    OLE ObjectPool contains an EPRINT stream with EMF data. This is rare in normal documents and is CVE-2007-3893/MS07-046-family evidence when paired with Office exploit payload anomalies, but the malformed EMF record is not proven by this rule alone.
  • 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.
  • 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
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen 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 VirtualAlloc API medium SC_STR_VIRTUALALLOC
    Reference to VirtualAlloc API
  • 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
babaf0110bc4a8cc1c25956d85d2f231edf9617dee05f6ea79bd18e466acd667		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3310 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_0002369c.exe
9df7a7abf354df4ea049b4fe9263801a86a224d627be7607f1eab69ee1276790		 embedded-pe Office MZ+PE at offset 0x2369C 491364 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
3e2209e3192cb6ffd40fb3b1ffea619eeb6ada40a4fd733d85784599b62b679d		 ole-package OLE Ole10Native stream: ObjectPool/_1667604229/Ole10Native 437174 bytes

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