Hancitor Office (OLE) / .DOCX malware analysis — malicious · 371357b50b0b673d

MALICIOUS

Office (OLE) / .DOCX

1.34 MB Created: 2021-04-28 09:03:00 Authoring application: Microsoft Office Word

MD5: 693df6e9f5dc0cd3ed4c6ede503ce8bc SHA-1: 6cf0cdcae848f850a2c6aad0ebf1329c9801036c SHA-256: 371357b50b0b673d30e42f68d65987dd340e7eacd482c4a5fdbf0f12a2cb2bf6

760 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 contains VBA macros that utilize WScript.Shell and CreateObject to execute embedded content. Specifically, the Document_Open macro triggers a Shell() call, indicating an attempt to run a secondary payload. This payload is likely the embedded PE executable, which was detected by ClamAV as Win.Dropper.Zusy-9856651-0. The presence of Hancitor-related signatures further supports this assessment.

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.

URL http://schemas.openxmlformats.org/drawingml/2006/main
Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
WScript.Shell usage critical OLE_VBA_WSCRIPT

WScript.Shell usage
Embedded PE executable critical OLE_EMBEDDED_EXE

MZ/PE header found inside document — possible embedded executable
ClamAV: Doc.Phishing.Hancitor-9853332-2 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Phishing.Hancitor-9853332-2
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 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
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.

URL http://schemas.openxmlformats.org/drawingml/2006/main
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.

URL http://schemas.openxmlformats.org/drawingml/2006/main
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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `d7cc30eb4b8ff8847d058cbafc5c8d9959cc187332ee18aa749cac311a4be873`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	5814 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_0008fa6e.exe` `312d953d97efe7adce0135ad895308891255d6591043ed9018b1f3e755bbe75b`	embedded-pe	Office MZ+PE at offset 0x8FA6E	814482 bytes
Detection ClamAV: Win.Dropper.Zusy-9856651-0 Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`ole10native_00.bin` `87d355a5860e31975e7e869d9a7e4a7e1566acc32b4fbcbcbcad265338f987d7`	ole-package	OLE Ole10Native stream: ObjectPool/_1681080665/Ole10Native	745772 bytes

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