Office (OLE) / .XLS malware analysis — malicious · 1dc170fb1ca9e7a4

MALICIOUS

Office (OLE) / .XLS

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

MD5: 4b4203c8b8be26fd7d7e47d2f5ca66f0 SHA-1: e87aa0a39f06bee77e3edf9e7d2eaeab8154b0d8 SHA-256: 1dc170fb1ca9e7a48b7b866d7ef0af55d84a7ff819864a5f83ddf9ddf08ffe7e

300 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is an XLS file containing VBA macros that utilize WScript.Shell and the Shell() function. This indicates an attempt to execute arbitrary commands, likely to download and run a secondary payload. The ClamAV detection 'Xls.Malware.Agent-7722827-0' further supports its malicious nature. No specific family could be identified, but the techniques suggest a downloader or agent.

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-7722827-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Malware.Agent-7722827-0
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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