Office (OLE) / .XLS malware analysis — malicious · d9343e0e9232c62b

MALICIOUS

Office (OLE) / .XLS

191.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel

MD5: 6a7b74d11bb4764d68437955fa0760e7 SHA-1: 2c06c01f9261fe80b627695a0ed746aa8f1f3744 SHA-256: d9343e0e9232c62bff651c2e6fa09c80d3a90faf00537d4da876e1a8d4223f10

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell

This XLS file contains a large VBA macro that is automatically executed upon opening due to the Auto_Open heuristic. The macro utilizes Shell() and CreateObject() calls, indicating it attempts to execute arbitrary commands. The presence of a long encoded blob and the execution terms within the macro suggest it is designed to download and execute a second-stage payload.

Heuristics 6

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
Auto_Open macro high OLE_VBA_AUTO

Auto_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` `e55141ed0bdf6905cbaf7899507bdc1f2e81f139315d418c712a6fa0702443b0`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	816640 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1699 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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