Office (OLE) / .XLS malware analysis — malicious · 3ea40aed7aa116bb

MALICIOUS

Office (OLE) / .XLS

72.0 KB Created: 2024-06-27 13:22:33 Authoring application: Microsoft Excel

MD5: c9b8bf66f0fe8719bea195f39fa4e326 SHA-1: 1e9ab72fd9eaf1f77c9bccca6efbd35786fd548f SHA-256: 3ea40aed7aa116bb3f817be11a879793838323cf38319190e39729f5997c6bb6

328 Risk Score

Malware Insights

MITRE ATT&CK

T1059 Command and Scripting Interpreter T1059.003 Windows Command Shell T1059.005 Visual Basic

The sample contains VBA macros that utilize WScript.Shell and cmd.exe, indicating an intent to execute commands. A critical heuristic firing for Shell() calls in VBA, combined with a lure to copy/paste content into a command execution context, strongly suggests the document is designed to prompt user interaction for malicious code execution. No specific family could be identified.

Heuristics 9

Shell() call in VBA critical OLE_VBA_SHELL

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

WScript.Shell usage
Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
cmd.exe reference in VBA high OLE_VBA_CMD

cmd.exe reference in VBA
Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE

Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Suspicious extracted artifact medium 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.
Environ() call (env variable access) low OLE_VBA_ENVIRON

Environ() call (env variable access)

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `fabaaca4b084ac639bfbc21be6aaafea31d8addf959e697df68c762053b0cdc3`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	11613 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 shell/COM execution token(s). Carved artifact contains 1 long base64-like blob(s).

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