Office (OLE) / .DOC malware analysis — malicious · 124aa448cd569453

MALICIOUS

Office (OLE) / .DOC

136.0 KB Created: 2020-04-19 04:19:00 Authoring application: Microsoft Office Word

MD5: fc470e2ae6025abe9f7cc3c7e6f7a208 SHA-1: 492e1430649ef770d86a3e4d88800e1e2f18680d SHA-256: 124aa448cd569453a51eb439b0b23e17cd961b5b3ab266a714ee636143660eac

264 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1105 Ingress Tool Transfer T1204.002 Malicious File

The sample contains VBA macros, specifically a Document_Open macro that utilizes CreateObject to download a file from the provided URL and save it to disk. This behavior is indicative of a dropper or downloader, aiming to fetch and execute a secondary payload. The ClamAV detection 'Doc.Dropper.Agent-6412232-1' further supports this assessment.

Heuristics 8

VBA downloads and writes a file to disk critical OLE_VBA_HTTP_DROP_EXEC

VBA reads an HTTP response body and writes it to disk (ADODB.Stream SaveToFile). Combined with the auto-exec/Shell paths this is a download-drop dropper even when the COM ProgIDs are built dynamically to evade keyword scanning.
ClamAV: Doc.Dropper.Agent-6412232-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Dropper.Agent-6412232-1
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.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Suspicious extracted artifact info 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.
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
- https://www.upload.ee/files/13693392/988fhhfbbf.exe_Signed.exe�
- https://www.upload.ee/files/13693392/988fhhfbbf.exe_Signed.exe

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `c770f06171d86854801e32fec2e0ae02be77607da40ce3a59f335933d83b9805`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	5766 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 27 long base64-like blob(s).

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