Office (OLE) / .XLS malware analysis — malicious · bb45abcd76074263

MALICIOUS

Office (OLE) / .XLS

488.5 KB Created: 2001-05-30 13:41:53 Authoring application: Microsoft Excel

MD5: f18d178ce6af498dbd70f22a316d87ed SHA-1: 6eee586a7eb5b0b10bdbb0dd448fb3a543dab98a SHA-256: bb45abcd7607426332bbefc5a17c551070b17bcf86a72dc9ceb57c20bcb05f6a

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The file contains a Workbook_Open macro, a common technique for auto-execution upon opening. This macro utilizes the Shell() function, indicating an intent to execute external commands or scripts. The presence of CreateObject() further suggests dynamic code execution or object manipulation. While no specific URLs or commands were directly extracted, the combination of these heuristics strongly suggests the macro is designed to download and execute a secondary payload, a typical pattern for initial access or further infection stages.

Heuristics 6

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
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 macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
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` `1a8f2b90133b5b7a6e975b7226b89a1e8d6eea6400c7764913ba7f28f47c29d3`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	783694 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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