Susp_Dropper (Kaspersky), Dropped:Generic.Malware.SFdld.9C61587D (B) (Emsisoft), Dropped:Generic.Malware.SFdld.9C61587D (AdAware)Behaviour:
The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.
Summary
MD5: 178c134feef7585723060977d99b8c56
SHA1: b8d93c13ae7e9575db84bd386a39d98f8bdd85b8
SHA256: ec8b43ace4536f7f1a53e376d78cd6a51154ace19647851a971a6a359063f1f5
SSDeep: 1536:oyQGYn7ok msqMzNu5R3piVoF2vKL3JGEBJs9WKZ:0vspJq35/0Q3 n
Size: 64000 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: ASPackv212, UPolyXv05_v6
Company: no certificate found
Created at: 2014-06-01 09:30:18
Analyzed on: WindowsXP SP3 32-bit
Summary:
Dynamic Analysis
Payload
No specific payload has been found.
Process activity
The Dropped creates the following process(es):
svchobst.exe:516
svchoste.exe:820
%original file name%.exe:1772
WScript.exe:1520
The Dropped injects its code into the following process(es):No processes have been created.
File activity
The process svchobst.exe:516 makes changes in the file system.
The Dropped creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
The process svchoste.exe:820 makes changes in the file system.
The Dropped creates and/or writes to the following file(s):
%WinDir%\svchobst.exe (53 bytes)
The process %original file name%.exe:1772 makes changes in the file system.
The Dropped creates and/or writes to the following file(s):
%System%\drivers\etc\host (61 bytes)
C:\kzzwhmcdw.vbs (164 bytes)
%System%\drivers\etc\hosts (61 bytes)
%System%\svchoste.exe (53 bytes)
The process WScript.exe:1520 makes changes in the file system.
The Dropped deletes the following file(s):
C:\%original file name%.exe (0 bytes)
C:\kzzwhmcdw.vbs (0 bytes)
Registry activity
The process svchobst.exe:516 makes changes in the system registry.
The Dropped creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Directory" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path4]
"CacheLimit" = "65452"
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache4"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections]
"SavedLegacySettings" = "3C 00 00 00 16 00 00 00 01 00 00 00 00 00 00 00"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
"Cookies" = "%Documents and Settings%\%current user%\Cookies"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache2"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common AppData" = "%Documents and Settings%\All Users\Application Data"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"
[HKLM\System\CurrentControlSet\Hardware Profiles\0001\Software\Microsoft\windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CacheLimit" = "65452"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CacheLimit" = "65452"
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "9A BE 92 D7 16 D0 C1 95 69 DB D1 3C 59 AE B5 C4"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache1"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CacheLimit" = "65452"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"MigrateProxy" = "1"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"History" = "%Documents and Settings%\%current user%\Local Settings\History"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache3"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Paths" = "4"
The Dropped modifies IE settings for security zones to map all local web-nodes with no dots which do not refer to any zone to the Intranet Zone:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"UNCAsIntranet" = "1"
To automatically run itself each time Windows is booted, the Dropped adds the following link to its file to the system registry autorun key:
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"(Default)" = "%WinDir%\svchobst.exe"
Proxy settings are disabled:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"
The Dropped modifies IE settings for security zones to map all urls to the Intranet Zone:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"IntranetName" = "1"
The Dropped modifies IE settings for security zones to map all web-nodes that bypassing the proxy to the Intranet Zone:
"ProxyBypass" = "1"
The Dropped deletes the following value(s) in system registry:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"AutoConfigURL"
"ProxyServer"
"ProxyOverride"
The process %original file name%.exe:1772 makes changes in the system registry.
The Dropped creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "8E AB 21 F8 35 D3 A1 E1 A9 84 CE 5F FE 9E 2F 6A"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cookies" = "%Documents and Settings%\%current user%\Cookies"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Documents" = "%Documents and Settings%\All Users\Documents"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Desktop" = "%Documents and Settings%\%current user%\Desktop"
[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache]
"LangID" = "09 04"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{b98117e8-75ca-11e2-81b2-000c293708fb}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Desktop" = "%Documents and Settings%\All Users\Desktop"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%System%]
"wscript.exe" = "Microsoft (R) Windows Based Script Host"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Personal" = "%Documents and Settings%\%current user%\My Documents"
The Dropped modifies IE settings for security zones to map all urls to the Intranet Zone:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"IntranetName" = "1"
The Dropped modifies IE settings for security zones to map all local web-nodes with no dots which do not refer to any zone to the Intranet Zone:
"UNCAsIntranet" = "1"
The Dropped modifies IE settings for security zones to map all web-nodes that bypassing the proxy to the Intranet Zone:
"ProxyBypass" = "1"
The Dropped deletes the following value(s) in system registry:
[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%System%]
"cmd.exe"
[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\D:]
"sandbox_svc.exe"
"Procmon.exe"
The process WScript.exe:1520 makes changes in the system registry.
The Dropped creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "7D 4E 88 D7 DE B2 46 E3 9A EF A9 0B D5 85 B8 A1"
Dropped PE files
MD5 | File path |
---|---|
c3b215001e3950b301d93b68f27a4152 | c:\WINDOWS\svchobst.exe |
HOSTS file anomalies
The Dropped modifies "%System%\drivers\etc\hosts" file which is used to translate DNS entries to IP addresses. The modified file is 61 bytes in size. The following strings are added to the hosts file listed below:
192.74.233.214 | alex.6sf.org |
Rootkit activity
No anomalies have been detected.
Propagation
Removals
Remove it with Ad-Aware
- Click (here) to download and install Ad-Aware Free Antivirus.
- Update the definition files.
- Run a full scan of your computer.
Manual removal*
- Terminate malicious process(es) (How to End a Process With the Task Manager):
svchobst.exe:516
svchoste.exe:820
%original file name%.exe:1772
WScript.exe:1520 - Delete the original Dropped file.
- Delete or disinfect the following files created/modified by the Dropped:
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%WinDir%\svchobst.exe (53 bytes)
%System%\drivers\etc\host (61 bytes)
C:\kzzwhmcdw.vbs (164 bytes)
%System%\drivers\etc\hosts (61 bytes)
%System%\svchoste.exe (53 bytes) - Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"(Default)" = "%WinDir%\svchobst.exe" - Restore the original content of the HOSTS file (%System%\drivers\etc\hosts): 127.0.0.1 localhost
- Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
Static Analysis
VersionInfo
No information is available.
No information is available.
PE Sections
Name | Virtual Address | Virtual Size | Raw Size | Entropy | Section MD5 |
---|---|---|---|---|---|
.text | 4096 | 61440 | 31744 | 5.54104 | c5490ef948980ce5fc6c1738dc200b0b |
.rdata | 65536 | 16384 | 5120 | 5.51412 | a008f48340e194c15110953787c34708 |
.data | 81920 | 106496 | 18944 | 5.53475 | 43cdaa9d3f7e27602791cf6cbd80b04a |
.rsrc | 188416 | 4096 | 1024 | 2.34634 | 0ccd3227be6ba6a76fdce033e01bf9ec |
.aspack | 192512 | 8192 | 6144 | 4.15305 | 92f748ecacf00a62cd866ce0533e382d |
.adata | 200704 | 4096 | 0 | 0 | d41d8cd98f00b204e9800998ecf8427e |
Dropped from:
Downloaded by:
Similar by SSDeep:
Similar by Lavasoft Polymorphic Checker:
Network Activity
URLs
URL | IP |
---|---|
hxxp://180.76.2.41/vxnrtljumzaeglr/item/14e02b535a0a4124a9f6d789 |
IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)
Traffic
Map
The Dropped connects to the servers at the folowing location(s):
Strings from Dumps
svchobst.exe_516:
.text
.text
`.rdata
`.rdata
@.data
@.data
.rsrc
.rsrc
SSSSh i@
SSSSh i@
GetWindowsDirectoryA
GetWindowsDirectoryA
KERNEL32.dll
KERNEL32.dll
USER32.dll
USER32.dll
RegCloseKey
RegCloseKey
RegOpenKeyExA
RegOpenKeyExA
RegOpenKeyA
RegOpenKeyA
ADVAPI32.dll
ADVAPI32.dll
MSVCRT.dll
MSVCRT.dll
_acmdln
_acmdln
WS2_32.dll
WS2_32.dll
_IEFile.exe
_IEFile.exe
"%s" |%s|%d|%d
"%s" |%s|%d|%d
%s%d_IEFile.exe
%s%d_IEFile.exe
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; );
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; );
HTTP/1.1
HTTP/1.1
User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0)
User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0)
WebDownFileFlood
WebDownFileFlood
TCPSendData
TCPSendData
TCPSendData
TCPSendData
TCPMutilConnect
TCPMutilConnect
TCPMutilConnect
TCPMutilConnect
TCPConnect
TCPConnect
TCPConnect
TCPConnect
alex.6sf.org:7117
alex.6sf.org:7117
svchobst.exe
svchobst.exe
http://122.224.34.18:8081/j8.html
http://122.224.34.18:8081/j8.html
%s%d.exe
%s%d.exe
http://hi.baidu.com/vxnrtljumzaeglr/item/6256a6548de878f8d3e10cf3
http://hi.baidu.com/vxnrtljumzaeglr/item/6256a6548de878f8d3e10cf3
InternetOpenUrlA
InternetOpenUrlA
wininet.dll
wininet.dll
http://
http://
%u MB
%u MB
Win %s SP%d
Win %s SP%d
count = %d
count = %d
WebDownFileFlood2
WebDownFileFlood2
http://hi.baidu.com/vxnrtljumzaeglr/item/14e02b535a0a4124a9f6d789
http://hi.baidu.com/vxnrtljumzaeglr/item/14e02b535a0a4124a9f6d789
%s %s
%s %s
iexplore.exe
iexplore.exe
Software\Microsoft\Windows\CurrentVersion\Run
Software\Microsoft\Windows\CurrentVersion\Run
kmon.dll
kmon.dll
428018698
428018698
MFC42.DLL
MFC42.DLL
SHELL32.dll
SHELL32.dll
ole32.dll
ole32.dll
OLEAUT32.dll
OLEAUT32.dll
DeleteUrlCacheEntry
DeleteUrlCacheEntry
FindNextUrlCacheEntryA
FindNextUrlCacheEntryA
FindFirstUrlCacheEntryA
FindFirstUrlCacheEntryA
WININET.dll
WININET.dll
.PAVCException@@
.PAVCException@@
index.dat
index.dat
desktop.ini
desktop.ini
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)
1, 0, 0, 1
1, 0, 0, 1
IEBroser.EXE
IEBroser.EXE
IEBroser.Document
IEBroser.Document
iexplore.exe_676:
%?9-*09,*19}*09
%?9-*09,*19}*09
.text
.text
`.data
`.data
.rsrc
.rsrc
msvcrt.dll
msvcrt.dll
KERNEL32.dll
KERNEL32.dll
NTDLL.DLL
NTDLL.DLL
USER32.dll
USER32.dll
SHLWAPI.dll
SHLWAPI.dll
SHDOCVW.dll
SHDOCVW.dll
Software\Microsoft\Windows\CurrentVersion\Explorer\BrowseNewProcess
Software\Microsoft\Windows\CurrentVersion\Explorer\BrowseNewProcess
IE-X-X
IE-X-X
rsabase.dll
rsabase.dll
System\CurrentControlSet\Control\Windows
System\CurrentControlSet\Control\Windows
dw15 -x -s %u
dw15 -x -s %u
watson.microsoft.com
watson.microsoft.com
IEWatsonURL
IEWatsonURL
%s -h %u
%s -h %u
iedw.exe
iedw.exe
Iexplore.XPExceptionFilter
Iexplore.XPExceptionFilter
jscript.DLL
jscript.DLL
mshtml.dll
mshtml.dll
mlang.dll
mlang.dll
urlmon.dll
urlmon.dll
wininet.dll
wininet.dll
shdocvw.DLL
shdocvw.DLL
browseui.DLL
browseui.DLL
comctl32.DLL
comctl32.DLL
IEXPLORE.EXE
IEXPLORE.EXE
iexplore.pdb
iexplore.pdb
ADVAPI32.dll
ADVAPI32.dll
MsgWaitForMultipleObjects
MsgWaitForMultipleObjects
IExplorer.EXE
IExplorer.EXE
IIIIIB(II<.Fg
IIIIIB(II<.Fg
7?_____ZZSSH%
7?_____ZZSSH%
)z.UUUUUUUU
)z.UUUUUUUU
,....Qym
,....Qym
````2```
````2```
{.QLQIIIKGKGKGKGKGKG
{.QLQIIIKGKGKGKGKGKG
;33;33;0
;33;33;0
8888880
8888880
8887080
8887080
browseui.dll
browseui.dll
shdocvw.dll
shdocvw.dll
6.00.2900.5512 (xpsp.080413-2105)
6.00.2900.5512 (xpsp.080413-2105)
Windows
Windows
Operating System
Operating System
6.00.2900.5512
6.00.2900.5512