Office (OOXML) / .XLSM malware analysis — malicious · e4475526196a357d

MALICIOUS

Office (OOXML) / .XLSM

138.9 KB Created: 2026-04-12 19:41:50 UTC Authoring application: Microsoft Excel 14.0300 First seen: 2026-04-24

MD5: e0f6437928527aae837ef14f81b048ff SHA-1: 89e11670675ce9a44ee1e9320bfbea01245438fc SHA-256: e4475526196a357d12a6b152279d653b2530eee23fec14202292aaba565900eb

260 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is an XLSM file containing a Workbook_Open macro. This macro utilizes WScript.Shell and the Shell() function to execute commands. The presence of 'macros.bas' and 'vbaProject_00.bin' as extracted artifacts further indicates malicious VBA code. The script's intent is to execute arbitrary commands, likely for downloading and running a second-stage payload, which is a common technique for malware delivery.

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` `42be57b84fcb9eefb76100686883355e2bb72477099a4bab554e5c5af4acba65`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	7444 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` `df493c0a338157e9914c995b19e38620ac57a3ea1787e881c32301dddbe2eba7`	vba-project	OOXML VBA project: xl/vbaProject.bin	23040 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.

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