Office (OOXML) / .XLSX malware analysis — malicious · f4237d200e5cc4a7

MALICIOUS

Office (OOXML) / .XLSX

14.3 KB Created: 2020-05-25 09:27:40 UTC Authoring application: Microsoft Excel 15.0300

MD5: 0fb7f07a3a6220f92195c4fa081ab351 SHA-1: 29222d77e25bbbf798967e364d34e5bcf8e526be SHA-256: f4237d200e5cc4a7fe6eac6e601a793f3a2d4c6e97b66030d102e57382ee21ac

260 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

This XLSX file contains a Workbook_Open macro that leverages WScript.Shell and the Shell() function to execute arbitrary commands. The presence of these critical heuristics strongly indicates the file is designed to download and execute a second-stage payload. No specific family could be identified, but the execution method is common for macro-based malware.

Heuristics 6

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
WScript.Shell usage critical OLE_VBA_WSCRIPT

WScript.Shell usage
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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` `763f327864ce7441efd6f14f667af90e0e6fdcf12a31c76155fe650e0c32ab8d`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	3692 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.
`vbaProject_00.bin` `3d090208db7d6eceb65c741a8b1fec8f4e961c9ca68477bb71c21eecc386d1ca`	vba-project	OOXML VBA project: xl/vbaProject.bin	18944 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

Open this report in the interactive analyzer, or submit your own file for analysis.