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

Static analysis result for SHA-256 8bcf45c2de07f322…

MALICIOUS

Office (OLE) / .DOC

735.5 KB Created: 2021-01-11 12:52:00 Authoring application: Microsoft Office Word
MD5: 5773e90313ac82d4a3a2174260e486da SHA-1: 4e40fbd0b04aee9b1c0f0daeb61e3f3879870cd5 SHA-256: 8bcf45c2de07f322b8efb959e3cef38fb9983fdb8b932c527321fd3db5e444c8
760 Risk Score

Malware Insights

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

The sample contains VBA macros with a Document_Open auto-exec macro that utilizes Shell() and CreateObject calls. It also embeds a PE executable and references Ole10Native, suggesting exploitation of CVE-2026-21514. The heuristics indicate the creation and manipulation of processes and memory, consistent with a dropper functionality. The embedded PE executable was detected by ClamAV as Win.Dropper.PinkSbot.

Heuristics 19

  • 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.
  • Reference to WriteProcessMemory API critical SC_STR_WRITEPROCESSMEMORY
    Reference to WriteProcessMemory API
  • 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 CreateProcess API high SC_STR_CREATEPROCESS
    Reference to CreateProcess API
  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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
1e23a61a097a11bba4a2d9383cb4d2eb5ff7f540a3fdf86a752275ddb368635b		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3973 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_00022483.exe
5b34f244d302cc682b12e9688804b784373e20831d60cc9f8478ec9adbd8c48b		 embedded-pe Office MZ+PE at offset 0x22483 612733 bytes
Detection
ClamAV: Win.Dropper.PinkSbot-9853702-0
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.
ole10native_00.bin
fce0977c4e43b186e3ed74e21431c58b7410c12e235fe4259f381092e0c2333d		 ole-package OLE Ole10Native stream: ObjectPool/_1671853185/Ole10Native 570731 bytes
Detection
ClamAV: Win.Dropper.PinkSbot-9853702-0
Obfuscation or payload: unlikely

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