Office (OLE) / .DOC malware analysis — malicious · afba9deb16b5100c

MALICIOUS

Office (OLE) / .DOC

605.0 KB Created: 2020-11-12 08:27:00 Authoring application: Microsoft Office Word

MD5: 0f75ad40daec01aee7642795cc544bb3 SHA-1: 76334ccc6e92d579495671de47664180517cdf05 SHA-256: afba9deb16b5100c5964ca33cd42c2aa6b972ad104efd3d58e0ad8b7070cd5f4

640 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a malicious OLE document containing VBA macros. The AutoOpen macro executes a Shell() call, which is highly suspicious. Furthermore, a PE executable is embedded within the document, and ClamAV detections indicate it's a dropper for Hancitor and Cridex malware. The embedded executable is likely responsible for downloading and executing additional malicious payloads.

Heuristics 16

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 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 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` `57298a84b88cf6640a524c22f00a20de8b4edfa28d4b092a7f6be6b7ac4792ed`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2778 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_0002229c.exe` `e46635f5f73e53dc0d02d977e9d5de6c9231691073dfa7247dd4a0e6cb9b09e0`	embedded-pe	Office MZ+PE at offset 0x2229C	479588 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` `f770e4786b6201a98376c09b6f9f4324db8729705a81c92001dd340a1ab89787`	ole-package	OLE Ole10Native stream: ObjectPool/_1667171533/Ole10Native	453046 bytes

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