Office (OLE) / .XLS malware analysis — malicious · 398a561ff4c998cd

MALICIOUS

Office (OLE) / .XLS

118.0 KB Created: 2021-04-13 13:37:17 Authoring application: Microsoft Excel

MD5: ed426ec2f319f5f532ea4402ab9d056d SHA-1: 5dc806e706ad2421278e34035c8e39ec443e0bf1 SHA-256: 398a561ff4c998cd97cc533265e2294fc06e3e29c680ec5cb77dd7a1ec96f4b5

222 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The file is an Excel spreadsheet containing a Workbook_Open VBA macro. This macro is designed to execute automatically when the workbook is opened. It utilizes CreateObject and references Windows Script Host, indicating it likely downloads and executes a second-stage payload from the embedded URL. The embedded URL points to an executable file, further supporting the payload delivery hypothesis.

Heuristics 7

Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
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
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 http://45.85.90.14/i88/IMG_073_911_287.ex

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `3818b862cc71a5747ff1f482820cb0051dab763f8e853a6d84f3e5aeb3fec078`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1189 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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