Office (OLE) / .XLS malware analysis — malicious · c5f01c0eecccf994

MALICIOUS

Office (OLE) / .XLS

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

MD5: fd830909822e8665cd1912b48e94fd01 SHA-1: c861c2254fadcda908ca3f380a680aeaf59d3de6 SHA-256: c5f01c0eecccf994bdde890fbfa550cd6b2044c44ecd420ee65559672e3439fe

208 Risk Score

Malware Insights

MITRE ATT&CK

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

The critical OLE_VBA_SHELL heuristic indicates the presence of a Shell() call within the VBA macros, which is a common technique for executing arbitrary commands. The Workbook_Open heuristic further suggests that this malicious code is designed to run automatically when the workbook is opened. The presence of a VBA macro and the use of Shell() strongly suggest the sample is a downloader or dropper, aiming to fetch and execute a secondary payload. No specific family could be identified.

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` `15615dcbd9c1b367591a6c997cd7c9217fba6ba468b16871a5927ed917fdf90f`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	784762 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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