Office (OLE) / .XLS malware analysis — malicious · 92894a7ae51b0554

MALICIOUS

Office (OLE) / .XLS

614.0 KB Created: 2021-05-26 12:10:58 Authoring application: Microsoft Excel

MD5: f1fcca46fd7af3f90aa67654250e7a05 SHA-1: 140fc6994e408cd4fe1579e388c03d8f5ef283ea SHA-256: 92894a7ae51b0554b666fed9634f3a34f490c27b9ad1ec9b85e9ef91fe0a0bc2

230 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic for Applications T1566.002 Spearphishing Attachment T1027 Obfuscated Files or Information

The sample is an XLS file containing a Workbook_Open VBA macro that uses CreateObject to execute code. This macro is designed to download and execute a secondary payload from one of the embedded URLs. The presence of an appended payload further supports the malicious intent.

Heuristics 8

OLE file has appended executable-looking payload bytes high OLE_APPENDED_PAYLOAD

OLE compound file contains a large high-entropy region beyond the declared major streams and that region includes shellcode, PE, or loader API markers. This is a payload-carrier signal, not a specific CVE attribution by itself.
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_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)
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — context-specific rules above attribute URLs they actually evaluated; this rule lists URLs that were present in the bytes but were not otherwise tied to a specific finding.
URL https://qdY!\bycec.in/wp-includes/js
- https://brandsites.gunweVdh311bhosti��
- https://surustore.com/imageY9a
- https://,z�Z��7��
- https://qdY!\bycec.in/wp-includes/js/tinymce/pqdY!\lugins/charmap/1MRWRA8z2S2Ajv.php
- https://marcoislandguidebook.com/wp
- https://brandsites.gunweVdh311bhosting.com.au/site/wp-includes/Text/Diff/Engine/eUhebviTSOzDZVdh311.php
- https://enlazafF8q,dor.com.es/wpfF8q,-content/themes/twentyninefF8q,teen/safF8q,ss/blfF8q,ofF8q,cks/mLrfH3gL5MqmI.php
- https://labrie-sabette.com/wp-includes/sodium_compat/nameg|NS1qspaced/Core/ChaCha20/gp5yHrBp.php
- https://,SX,S|Rdinratnews.net/wp-conten,SX,S|Rt/uploads/2020/05/t,SX,S|Rhumbnai,SX,S|Rls/brCyRumj.php

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `7030438f31ea131c85ae8923c9525140f59c8f226cddd7e025e48a2de4826ad4`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	131209 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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