Office (OLE) / .DOCX malware analysis — malicious · d4d64e127c43ae0c

MALICIOUS

Office (OLE) / .DOCX

42.5 KB Created: 2020-08-12 14:01:00 Authoring application: Microsoft Office Word

MD5: 6f4ff4b7e420605aa9a87814a32c9d88 SHA-1: c3ae98b3d240479cd20b52ec44ef6e50f37db23e SHA-256: d4d64e127c43ae0ca12295120e4b64acb560152ffe5564bd73d88edcdab571d3

428 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1055 Process Injection

The sample is a malicious Office document containing VBA macros, indicated by multiple OLE_VBA_* heuristic firings. The presence of critical heuristics like SC_STR_CREATEREMOTETHREAD, SC_STR_WRITEPROCESSMEMORY, and SC_STR_VIRTUALALLOC suggests the macros are attempting to inject code into other processes. The AutoOpen and Workbook_Open macros are designed to trigger this malicious behavior automatically when the document is opened, likely to download and execute a second-stage payload.

Heuristics 12

Reference to WriteProcessMemory API critical SC_STR_WRITEPROCESSMEMORY

Reference to WriteProcessMemory API
Reference to CreateRemoteThread API critical SC_STR_CREATEREMOTETHREAD

Reference to CreateRemoteThread API
ClamAV: Doc.Macro.Injection-6355574-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Macro.Injection-6355574-0
Reference to CreateProcess API high SC_STR_CREATEPROCESS

Reference to CreateProcess API
AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen macro
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
Auto_Open macro high OLE_VBA_AUTO

Auto_Open macro
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
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Environ() call (env variable access) low OLE_VBA_ENVIRON

Environ() call (env variable access)
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `e26eb06ff6f14a3a3571584ccf308d7c19697738a036a1ad84aa30d990419efa`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	7837 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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