MALICIOUS
302
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1059.003 Windows Command Shell
T1059.001 PowerShell
T1547.001 Registry Run Keys / Startup Folder
The Workbook_Open macro utilizes WScript.Shell to create a batch file named 'e038ff73.bat' in the user's startup directory. This batch file is constructed from concatenated hexadecimal strings, which when decoded, appear to download and execute a VBScript payload from a temporary file. The script's primary function is to establish persistence and download further malicious content.
Heuristics 8
-
Shell() call in VBA critical OLE_VBA_SHELLShell() call in VBA
-
WScript.Shell usage critical OLE_VBA_WSCRIPTWScript.Shell usage
-
Reference to Windows Script Host high SC_STR_WSCRIPTReference to Windows Script Host
-
Workbook_Open macro high OLE_VBA_WBOPENWorkbook_Open macro
-
CreateObject call high OLE_VBA_CREATEOBJCreateObject call
-
VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXECCompiled 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.
-
VBA macros detected medium OLE_VBA_MACROSDocument contains VBA macro code
-
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGEOne 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.bas6f97d20c2559d33157c935c306e48519b9048378bdc569a05b911669ef2ac468 |
vba-macro | oletools.olevba.extract_macros (decoded VBA source) | 6471 bytes |
|
Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 21 long base64-like blob(s).
|
|||
Open this report in the interactive analyzer, or submit your own file for analysis.