Office (OOXML) / .XLSM malware analysis — malicious · 5776451eed07e4ba

MALICIOUS

Office (OOXML) / .XLSM

446.1 KB Created: 2000-04-13 21:48:14 UTC Authoring application: Microsoft Excel 12.0000

MD5: e0b67d652b94f6189a8262c159ca2a17 SHA-1: f94880b6ee64de1774d380e424d35997e8d1bd63 SHA-256: 5776451eed07e4ba7290d5f620ff3080222ec8a292e7efbd1b7cd01775a09aea

148 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, which is a common technique for initial execution. The macro uses `CreateObject` to execute a command. It reconstructs a path for a file to be written to disk and then executes it. The reconstructed path for the executable is 'C:\Users\Public\Documents\IAccessible2Proxy.exe'. The macro also attempts to establish persistence by writing to the registry key 'HKCU\Software\Microsoft\Windows\CurrentVersion\Run\IAccessible2Proxy'.

Heuristics 5

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
Environ() call (env variable access) low OLE_VBA_ENVIRON

Environ() call (env variable access)

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `5c532a8c71bfd90e2de39ee5c4a66ded44c3d61415dac96ad0fc03c10812714b`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	1108 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` `fac3488a836ba22255f33b2f6bcea958941654391592a6e5c368ec41cb539452`	vba-project	OOXML VBA project: xl/vbaProject.bin	9216 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely 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.