Malicious MS Excel Document analysis – fba4c8c07c3d

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File

Type

Microsoft Office Document

17 malicious · 41 files

XLSfba4c8c07c3dff793e709b2bac8015cdMS Excel DocumentT1059.005 · ATT&CK T1564.007

XML[Content_Types].xmlextracted from MS Excel Document · XML

BIN_rels

BINxl

BIN_rels

XMLworkbook.xmlextracted from MS Excel Document · XML

BINtheme

BINdrawings

BINworksheets

OFFvbaProject.binextracted from MS Excel Document · MS Office DocumentATT&CK T1564.007

BINRoot Entry

BINPROJECTextracted from MS Office Document

BINPROJECTwmextracted from MS Office Document

BINVBA

BINdirextracted from MS Office Document

VBAModule1sub-stream · VBA ModuleATT&CK T1564.007

VBS[Stored VBA]code extracted · VBScriptATT&CK T1564.007

VBA[PCode]disassembled · VBA ModuleATT&CK T1564.007

VBS[Decompiled VBA]decompiled · VBScriptATT&CK T1564.007

VBA[Full Diff]generated · VBA ModuleATT&CK T1564.007

VBA[Partial Diff]generated · VBA ModuleATT&CK T1564.007

BIN__SRP_0extracted from MS Office Document

BIN__SRP_1extracted from MS Office Document

BIN__SRP_2extracted from MS Office Document

BIN__SRP_3extracted from MS Office Document

VBAThisWorkbooksub-stream · VBA ModuleATT&CK T1564.007

VBS[Stored VBA]code extracted · VBScriptT1059.005 · ATT&CK T1564.007

VBS[Stored VBA].deobfuscated.vbsdeobfuscated · VBScriptT1059.005

SH[Command #0] code extracted · Bash Script

PS1[PCode]disassembled · PowerShellATT&CK T1564.007

VBS[Decompiled VBA]decompiled · VBScriptT1059.005 · ATT&CK T1564.007

VBS[Decompiled VBA].deobfuscated.vbsdeobfuscated · VBScriptT1059.005

VBS[Full Diff]generated · VBScriptATT&CK T1564.007

VBS[Partial Diff]generated · VBScriptATT&CK T1564.007

BIN_VBA_PROJECTextracted from MS Office Document

BINmedia

XMLstyles.xmlextracted from MS Excel Document · XML

BINdocProps

URLs in VB Code - #1 URIsuspect

http:/huhuhuhuhuhuhuhuhuhuhu

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17 malicious · 41 files

XLSfba4c8c07c3dff793e709b2bac8015cdMS Excel DocumentT1059.005 · ATT&CK T1564.007

XML[Content_Types].xmlextracted from MS Excel Document · XML

BIN_rels

BINxl

BIN_rels

XMLworkbook.xmlextracted from MS Excel Document · XML

BINtheme

BINdrawings

BINworksheets

OFFvbaProject.binextracted from MS Excel Document · MS Office DocumentATT&CK T1564.007

BINRoot Entry

BINPROJECTextracted from MS Office Document

BINPROJECTwmextracted from MS Office Document

BINVBA

BINdirextracted from MS Office Document

VBAModule1sub-stream · VBA ModuleATT&CK T1564.007

VBS[Stored VBA]code extracted · VBScriptATT&CK T1564.007

VBA[PCode]disassembled · VBA ModuleATT&CK T1564.007

VBS[Decompiled VBA]decompiled · VBScriptATT&CK T1564.007

VBA[Full Diff]generated · VBA ModuleATT&CK T1564.007

VBA[Partial Diff]generated · VBA ModuleATT&CK T1564.007

BIN__SRP_0extracted from MS Office Document

BIN__SRP_1extracted from MS Office Document

BIN__SRP_2extracted from MS Office Document

BIN__SRP_3extracted from MS Office Document

VBAThisWorkbooksub-stream · VBA ModuleATT&CK T1564.007

VBS[Stored VBA]code extracted · VBScriptT1059.005 · ATT&CK T1564.007

VBS[Stored VBA].deobfuscated.vbsdeobfuscated · VBScriptT1059.005

SH[Command #0] code extracted · Bash Script

PS1[PCode]disassembled · PowerShellATT&CK T1564.007

VBS[Decompiled VBA]decompiled · VBScriptT1059.005 · ATT&CK T1564.007

VBS[Decompiled VBA].deobfuscated.vbsdeobfuscated · VBScriptT1059.005

VBS[Full Diff]generated · VBScriptATT&CK T1564.007

VBS[Partial Diff]generated · VBScriptATT&CK T1564.007

BIN_VBA_PROJECTextracted from MS Office Document

BINmedia

XMLstyles.xmlextracted from MS Excel Document · XML

BINdocProps

vbaDNA - VBA Stomping & Purging Stategy detection

	Module Name0
	Module1	VBA Stomping ATT&CK T1564.007 Malicious Malicious Document VBA Macro
PCode Decompiled VBA Stored VBA Partial Diff. Full Diff. Missing P-Code: The Office document under analysis has been identified as having undergone VBA Purging techniques, as the P-Code block within the document is currently inaccessible. As a result, the decompilation of the code was not possible, leaving only the stored code available in textual format for analysis. VBA Purging essentially involves the elimination of the PerformanceCache section from the module streams. To fully erase any traces of the P-Code section, the MODULEOFFSET between the two sections is adjusted to 0 by altering the _VBA_PROJECT stream, and all SRP streams that also house PerformanceCache data are removed. Following the removal of the compiled code, antivirus engines and Yara rules, which depend on precise string matches, are rendered ineffective. This allows macros to bypass them effortlessly, owing to the compressed format of the remaining source code.
	ThisWorkbook	VBA Stomping ATT&CK T1564.007 Malicious Malicious Document Blacklist VBA VBA Macro
PCode Decompiled VBA Stored VBA Partial Diff. Full Diff. Missing P-Code: The Office document under analysis has been identified as having undergone VBA Purging techniques, as the P-Code block within the document is currently inaccessible. As a result, the decompilation of the code was not possible, leaving only the stored code available in textual format for analysis. VBA Purging essentially involves the elimination of the PerformanceCache section from the module streams. To fully erase any traces of the P-Code section, the MODULEOFFSET between the two sections is adjusted to 0 by altering the _VBA_PROJECT stream, and all SRP streams that also house PerformanceCache data are removed. Following the removal of the compiled code, antivirus engines and Yara rules, which depend on precise string matches, are rendered ineffective. This allows macros to bypass them effortlessly, owing to the compressed format of the remaining source code.

No malware configuration was found at this point.

URLs in VB Code - #1 URIsuspect

http:/huhuhuhuhuhuhuhuhuhuhu

fba4c8c07c3dff793e709b2bac8015cd › xl › vbaProject.bin › Root Entry › VBA › ThisWorkbook › [Stored VBA]

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