Hancitor Office (OLE) / .DOC malware analysis — malicious · bd768d902abb211e

MALICIOUS

Office (OLE) / .DOC

391.0 KB Created: 2021-02-17 11:05:00 Authoring application: Microsoft Office Word

MD5: df3d7fcf63c6fd0c482d88aed6eecb1d SHA-1: b790953f90ac8af2d7db4ce6454f451e809aab77 SHA-256: bd768d902abb211edf805fddc926ad87287a770c70ac62475ad4f25d1f314d39

720 Risk Score

Malware Insights

Hancitor · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File T1105 Ingress Tool Transfer

The sample is a malicious Office document containing VBA macros. The 'Document_Open' macro triggers a 'Shell()' call, which is highly indicative of executing a payload. Static analysis identified an embedded PE executable and heuristics confirm the use of APIs like ShellExecute, VirtualProtect, LoadLibrary, and GetProcAddress, commonly used for payload execution and evasion. The ClamAV detection 'Doc.Dropper.Hancitor-9845854-0' strongly suggests the Hancitor family, known for dropping further malware. The embedded executable itself was also flagged by ClamAV.

Heuristics 18

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.
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 PowerShell high SC_STR_POWERSHELL

Reference to PowerShell
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.

Filename	Kind	Source	Size
`macros.bas` `32f80c2671a6af4196a4fac63f9444037b9ce9950f13180576877d3d9951a4e8`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	4857 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_00023482.exe` `eccc8960e3b528080ef439c437c4a6fc415affce1b4bdd4922a61ae7717ec6b3`	embedded-pe	Office MZ+PE at offset 0x23482	255870 bytes
Detection ClamAV: Win.Packed.Hancitor-9845005-0 Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`ole10native_00.bin` `af2c50e0d5bba18ffc25f5390d193b1b25b7aabfed517dda19509ca0835d3885`	ole-package	OLE Ole10Native stream: ObjectPool/_1675036333/Ole10Native	213864 bytes

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