Office (OLE) / .XLS malware analysis — malicious · 3f43eed343aec087

MALICIOUS

Office (OLE) / .XLS

77.0 KB Created: 2020-04-28 09:56:52 Authoring application: Microsoft Excel

MD5: 6629881d69e00640765474b6366eb11b SHA-1: 1ac4146e11f35674312d56c0df870ee34aa47317 SHA-256: 3f43eed343aec0875a6a1c26b7bec73d20557b688835c377a7f1ae6d7be0a9a1

300 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample contains VBA macros that utilize WScript.Shell and CreateObject, indicating an attempt to execute arbitrary code. The presence of 'macros.bas' and the 'SC_STR_WSCRIPT' heuristic further support this. The primary intent appears to be downloading and executing a second-stage payload, as suggested by the WScript.Shell usage and the 'OLE_VBA_SHELL' firing. The document body content is largely irrelevant, consisting of random words.

Heuristics 7

Shell() call in VBA critical OLE_VBA_SHELL

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

WScript.Shell usage
ClamAV: Xls.Malware.Agent-7723448-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Malware.Agent-7723448-0
Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `0e52df386030db15123bf0a10b07d3b5889c06de589784000d3337c945b28300`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1275 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).

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