Office (OLE) / .XLS malware analysis — malicious · 235602d2819de318

MALICIOUS

Office (OLE) / .XLS

155.0 KB Created: 2021-02-04 06:37:24 Authoring application: Microsoft Excel

MD5: ef9ce9a4fd059e0113852f07a5e765a3 SHA-1: afc447469a33031717f38c7d344ba57019a84bc8 SHA-256: 235602d2819de318cb16c1653d3e2500b64688ad18f8f4e960dff1ab0b7e4b74

420 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

The critical OLE_VBA_SHELL and OLE_VBA_WSCRIPT heuristics indicate the use of WScript.Shell within VBA macros. The Workbook_Open macro and the SE_ENABLE_LURE heuristic suggest a common lure to enable macros for malicious execution. The CLAMAV_DETECTION further confirms its malicious nature. The VBA code likely downloads and executes a second-stage payload, as indicated by the combination of these findings.

Heuristics 10

Shell() call in VBA critical OLE_VBA_SHELL

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

WScript.Shell usage
ClamAV: Xls.Macro.Obfuscation-9804250-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Macro.Obfuscation-9804250-0
Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC

Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
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
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `eedd06b0b642f2fd05beb7c6b7d83fc091cbd9fe28bbb936fbbb7a62c885eeca`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	20835 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s). Carved artifact contains 69 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

Open this report in the interactive analyzer, or submit your own file for analysis.