Office (OLE) / .DOCX malware analysis — malicious · 95450a642e57b4d0

MALICIOUS

Office (OLE) / .DOCX

968.5 KB Created: 2020-09-21 17:10:00 Authoring application: Microsoft Office Word

MD5: 4bc73cd484291f7918bd7a792517c003 SHA-1: 225112037724ccd98f06aea63c029fe158c37f1a SHA-256: 95450a642e57b4d018c235b7f1dfea3c600b0f14fa33e5ff4ee42fd27fec9abc

400 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

The sample is a malicious Office document containing VBA macros. Critical heuristics indicate the use of `Shell()` and `WScript.Shell`, suggesting the macros are intended to execute arbitrary commands. The presence of an `Auto_Close` macro further points to automatic execution upon document closure. The ClamAV signature 'Doc.Dropper.Sdrop-9769002-0' indicates this is a dropper, likely downloading and executing a second-stage payload.

Heuristics 10

Shell() call in VBA critical OLE_VBA_SHELL

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

WScript.Shell usage
ClamAV: Doc.Dropper.Sdrop-9769002-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Dropper.Sdrop-9769002-0
Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
Auto_Close macro high OLE_VBA_AUTOCLOSE

Auto_Close 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.
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `4c9238efcbd310b4639ed140e6ecc8e3a2cfd64a7d56323e021e6c1a7fd6b0a7`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	34613 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.

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