Office (OLE) / .XLS malware analysis — malicious · 21197f41ffa9857e

MALICIOUS

Office (OLE) / .XLS

58.5 KB Created: 2020-04-08 08:02:22 Authoring application: Microsoft Excel

MD5: ce25334ce154e8abc20fff19d6dad6f9 SHA-1: 313473fb3823860f99ba64d69be85f1e8d5eedea SHA-256: 21197f41ffa9857e17f520dcb24a06bb5a05347833e96fb73b76534ae867fa91

300 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is an Excel spreadsheet containing VBA macros that utilize WScript.Shell and CreateObject, indicating an attempt to execute arbitrary code. The ClamAV detection 'Xls.Dropper.Agent-7654373-0' strongly suggests a dropper functionality. The document body, while heavily obfuscated, contains references that might be part of a lure, but the primary malicious intent is derived from the macro execution capabilities.

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.Dropper.Agent-7654373-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Dropper.Agent-7654373-0
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` `c55c640dea6229d89e3d05372ba4b930a9ff67c0899325f8b604a9ef9cef4251`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1711 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).

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