Office (OOXML) / .XLSM malware analysis — malicious · 86ac14537ad8655b

MALICIOUS

Office (OOXML) / .XLSM

80.9 KB Created: 2020-11-08 22:49:42 UTC Authoring application: Microsoft Excel 16.0300

MD5: ed32be50c001f2a37726d30d3b5cbbc5 SHA-1: 5990cbb24e1023bb58dc1e23aa9e36f5d5d7e9ce SHA-256: 86ac14537ad8655b10f36d6e036dfe3e95d65138d14bd1ebd66ab5da4f10d926

160 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059 Command and Scripting Interpreter

The critical heuristic firing for a Shell() call within a Workbook_Open macro indicates that this Excel macro is designed to execute arbitrary commands upon opening. This is a common technique for downloading and executing further malicious content. No specific family could be identified from the available heuristics.

Heuristics 4

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
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 project inside OOXML medium OOXML_VBA

Document contains vbaProject.bin — VBA macros present

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `65751831318298e41363736f35dfafb9776c11cf90650c12b44a5bde25947731`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	2008 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`vbaProject_00.bin` `b9b12c1ccb7277bf945de853d7455fc03583a88d6f7857fd1d8d96290f9ba965`	vba-project	OOXML VBA project: xl/vbaProject.bin	14336 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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