Malicious Office (OOXML) / .XLSM — malware analysis report

Static analysis result for SHA-256 54ff9c472be10b92…

MALICIOUS

Office (OOXML) / .XLSM

389.9 KB Created: 2020-01-28 19:47:00 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2021-10-27
MD5: 02c95603229648cdcc202dbfcb0986d1 SHA-1: 3e54ebf74799844c8de1922c5cd4b60f1d8c0340 SHA-256: 54ff9c472be10b924ae15c252e08bb870e1a1cf8361a00b74cc0d03113dd6e54
110 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment

This XLSM file contains VBA macros that employ a lure to encourage users to enable content. Upon activation, the script reconstructs and executes a PowerShell command to download a second-stage executable from 'http://18.159.149.5/nbl/joy/1-1/sample_03018200_ISO_03512028.exe'. The script also attempts to establish persistence by writing to the registry key 'HKCU\Software\Microsoft\Windows\CurrentVersion\SysWOW64\PowerShell\1.0\shell.exe' using a reconstructed PowerShell command.

Heuristics 5

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • VBA project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • External hyperlinks (6) low OOXML_EXTERNAL_HYPERLINKS
    Document contains 6 external hyperlinks — clickable URLs are stored as external relationships. First target: https://go.microsoft.com/fwlink/?linkid=844736
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://go.microsoft.com/fwlink/?linkid=844736
    • http://go.microsoft.com/fwlink/?LinkId=844969
    • https://go.microsoft.com/fwlink/?linkid=844749
    • https://go.microsoft.com/fwlink/?linkid=844741
    • https://go.microsoft.com/fwlink/?linkid=844732
    • https://go.microsoft.com/fwlink/?linkid=844725
    • https://go.microsoft.com/fwlink/?linkid=844742
    • https://go.microsoft.com/fwlink/?linkid=844734
    • https://go.microsoft.com/fwlink/?linkid=844751
    • https://go.microsoft.com/fwlink/?linkid=844745
    • https://go.microsoft.com/fwlink/?linkid=844743
    • https://go.microsoft.com/fwlink/?linkid=844728
    • https://go.microsoft.com/fwlink/?linkid=844746
    • https://go.microsoft.com/fwlink/?linkid=844747
    • https://go.microsoft.com/fwlink/?linkid=844726
    • https://go.microsoft.com/fwlink/?linkid=844738
    • https://go.microsoft.com/fwlink/?linkid=844735
    • https://go.microsoft.com/fwlink/?linkid=844750
    • http://go.microsoft.com/fwlink/?LinkId=846285

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
560efd340be6a7b263e6746ff944e70a1a5c750e06b9b263195f0ab30b7811ee		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 5982 bytes
vbaProject_00.bin
8da086b9d9bd88a96280b5d2c8299765e0fca69366b5dbe1323124671ce236e8		 vba-project OOXML VBA project: xl/vbaProject.bin 10752 bytes

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