MALICIOUS
160
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1140 Deobfuscate/Decode Files or Information
T1204.002 Malicious File
The Workbook_Open macro contains an obfuscated VBA loader that decodes a Base64 string. This decoded string is a PowerShell command that downloads a second-stage executable from 'http://192.236.178.80/7z/0617773.jpg' and saves it as 'C:\Users\Public\whpfwkrl.exe', then executes it. The use of CreateObject and obfuscated auto-exec loaders is characteristic of macro-based malware.
Heuristics 4
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Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADERAuto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
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Workbook_Open macro high OLE_VBA_WBOPENWorkbook_Open macro
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CreateObject call high OLE_VBA_CREATEOBJCreateObject call
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VBA macros detected medium OLE_VBA_MACROSDocument contains VBA macro code
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
macros.bas15626bf52d112c8effa2bc1135c420b60f4a27b9b021bccd72ada96ea1f93f15 |
vba-macro | oletools.olevba.extract_macros (decoded VBA source) | 1259 bytes |
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