Ursnif Office (OLE) / .DOCX malware analysis — malicious · 8c19528ed237067f

MALICIOUS

Office (OLE) / .DOCX

83.5 KB Created: 2021-11-09 22:39:00 Authoring application: Microsoft Office Word

MD5: 4bf987800ff8ab9d95f2438510c91685 SHA-1: 29a0d89344d8496b5d9557a35b9b529f96383f37 SHA-256: 8c19528ed237067fe58161fb601fdfbf29a6cc90bd2842a6315966d5ca76f956

280 Risk Score

Malware Insights

Ursnif · confidence 95%

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.005 Visual Basic T1059.001 PowerShell

The file is a malicious Office document containing VBA macros, specifically an AutoOpen macro that utilizes a Shell() call. The document body lures the user to 'Enable Content' by promising free cryptocurrency, a common social engineering tactic. The presence of an AutoOpen macro combined with a Shell() call strongly suggests the execution of a second-stage payload. ClamAV detection confirms this as Doc.Dropper.Ursnif-6864686-0, indicating the Ursnif banking trojan family.

Heuristics 8

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
ClamAV: Doc.Dropper.Ursnif-6864686-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Dropper.Ursnif-6864686-0
AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen macro
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
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
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` `69cc94f58fa5c3aefe8f0d906ff832dbc2ed8129861eeb657c12cc6229463ae4`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1012 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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