Office (OLE) / .DOCX malware analysis — malicious · d6273f528ad9fe35

MALICIOUS

Office (OLE) / .DOCX

12.54 MB Created: 2022-03-29 22:29:00 Authoring application: Microsoft Office Word First seen: 2022-04-04

MD5: 63aaf7e9b28cc5f9a48891e99256d866 SHA-1: c3524aac7885c96c8ef8badeeb6a28037d964dff SHA-256: d6273f528ad9fe35b2d8d46521359d5d19ff6c3fba44da01a1fd23796905be92

238 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer

The sample contains a Document_Open VBA macro that uses CreateObject to instantiate Wscript.Shell, indicating an attempt to execute commands. The macro also appears to construct URLs to download files such as 'simba.png', 'u.txt', 'user.bin', 'vcruntime140.dll', 'mozglue.dll', 'msvcp140.dll', and 'seamonkey.exe' from 'clusterrift.com'. This suggests the macro's primary purpose is to download and execute a second-stage payload. The document body uses a UNICEF humanitarian action theme as a lure to encourage macro execution.

Heuristics 9

Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
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.
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
Environ() call (env variable access) low OLE_VBA_ENVIRON

Environ() call (env variable access)
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://www.unicef.org/appeals
- https://www.unicef.org/coronavirus/donors-and-partners
- https://www.unicef.org/emergencies/global-humanitarian-thematic-funding
- http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `37514605fc1ef6c523531bdf8ecd2f34c6f458f43731d742037e8c21370748c3`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	24660 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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