Trojan.Win32.Qhost.it (Kaspersky), Trojan.Generic.1632854 (B) (Emsisoft), Trojan.Generic.1632854 (AdAware), Backdoor.Win32.PcClient.FD (Lavasoft MAS)Behaviour: Trojan, Backdoor
The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.
Summary
MD5: e3c9d930fa03ceaaa2282cbe32232918
SHA1: 287f6665d6c2082b3cc8246800f110b6b282be44
SHA256: 22ca53697c125ab9ef362921c9e46f4c32acdc3fa0eb8cfcc432b69613a7e969
SSDeep: 3072:FFsJrEEfoI8K5DNmESPhvMtkzNU2Vo0NQQAZcigcVCv De4HsJMTZj /l6bEeE:nsxr8KofphP5QQAZjgcVs D1M0xa6gP
Size: 212992 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6, MicrosoftVisualC, MicrosoftVisualCv50v60MFC, MicrosoftVisualC50, Armadillov171
Company: AirInstaller
Created at: 2007-05-18 03:00:41
Analyzed on: WindowsXP SP3 32-bit
Summary: Trojan. A program that appears to do one thing but actually does another (a.k.a. Trojan Horse).
Dynamic Analysis
Payload
No specific payload has been found.
Process activity
The Trojan creates the following process(es):
%original file name%.exe:464
The Trojan injects its code into the following process(es):
rundll32.exe:1504
Mutexes
The following mutexes were created/opened:No objects were found.
File activity
The process rundll32.exe:1504 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):
%System%\drivers\etc\hosts (25 bytes)
The process %original file name%.exe:464 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):
%System%\gvsxrto.dll (169 bytes)
Registry activity
The process rundll32.exe:1504 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "9B E0 B2 FC BB 34 4E D9 CF 90 84 09 5A CE E5 80"
[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappprxy\traceIdentifier]
"Guid" = "5f31090b-d990-4e91-b16d-46121d0255aa"
[HKCR\CLSID\{2C1CD3D7-86AC-4068-93BC-A02304B20509}\InProcServer32]
"(Default)" = "%System%\gvsxrto.dll"
[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappprxy\traceIdentifier]
"BitNames" = " Error Unusual Info Debug"
[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappprxy]
"ControlFlags" = "1"
[HKCR\CLSID\{2C1CD3D7-86AC-4068-93BC-A02304B20509}\InProcServer32]
"ThreadingModel" = "Apartment"
[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappcfg]
"Active" = "1"
[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappcfg\traceIdentifier]
"BitNames" = " Error Unusual Info Debug"
[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappprxy]
"LogSessionName" = "stdout"
"Active" = "1"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad]
"DCOM Server 20509" = "{2C1CD3D7-86AC-4068-93BC-A02304B20509}"
[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappcfg\traceIdentifier]
"Guid" = "5f31090b-d990-4e91-b16d-46121d0255aa"
[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappcfg]
"ControlFlags" = "1"
"LogSessionName" = "stdout"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\SharedTaskScheduler]
"{2C1CD3D7-86AC-4068-93BC-A02304B20509}" = "DCOM Server 20509"
The Trojan deletes the following value(s) in system registry:
The Trojan disables automatic startup of the application by deleting the following autorun value:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"DCOM Server"
Dropped PE files
MD5 | File path |
---|---|
deea3b710b9d023f4092f50663246b9d | c:\WINDOWS\system32\gvsxrto.dll |
HOSTS file anomalies
The Trojan modifies "%System%\drivers\etc\hosts" file which is used to translate DNS entries to IP addresses. The modified file is 1698 bytes in size. The following strings are added to the hosts file listed below:
127.0.0.1 | www.trendmicro.com |
127.0.0.1 | rads.mcafee.com |
127.0.0.1 | customer.symantec.com |
127.0.0.1 | liveupdate.symantec.com |
127.0.0.1 | us.mcafee.com |
127.0.0.1 | updates.symantec.com |
127.0.0.1 | www.nai.com |
127.0.0.1 | secure.nai.com |
127.0.0.1 | dispatch.mcafee.com |
127.0.0.1 | download.mcafee.com |
127.0.0.1 | www.my-etrust.com |
127.0.0.1 | mast.mcafee.com |
127.0.0.1 | ca.com |
127.0.0.1 | www.ca.com |
127.0.0.1 | networkassociates.com |
127.0.0.1 | www.networkassociates.com |
127.0.0.1 | avp.com |
127.0.0.1 | www.kaspersky.com |
127.0.0.1 | www.avp.com |
127.0.0.1 | downloads4.kaspersky-labs.com |
127.0.0.1 | downloads3.kaspersky-labs.com |
127.0.0.1 | downloads2.kaspersky-labs.com |
127.0.0.1 | downloads1.kaspersky-labs.com |
127.0.0.1 | www.f-secure.com |
127.0.0.1 | viruslist.com |
127.0.0.1 | www.viruslist.com |
127.0.0.1 | liveupdate.symantecliveupdate.com |
127.0.0.1 | www.mcafee.com |
127.0.0.1 | sophos.com |
127.0.0.1 | www.sophos.com |
127.0.0.1 | securityresponse.symantec.com |
127.0.0.1 | www.symantec.com |
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):
%original file name%.exe:464
- Delete the original Trojan file.
- Delete or disinfect the following files created/modified by the Trojan:
%System%\drivers\etc\hosts (25 bytes)
%System%\gvsxrto.dll (169 bytes) - Restore the original content of the HOSTS file (%System%\drivers\etc\hosts): 127.0.0.1 localhost
- Reboot the computer.
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 | 24677 | 28672 | 4.29127 | 6ab331ba1fe7a9988a12d998db095986 |
.rdata | 32768 | 2586 | 4096 | 2.72913 | 602bd63ca0ee43c0f08f17d299e6ef7e |
.data | 36864 | 179288 | 176128 | 5.49787 | cf3c3f9e29f5431eba024084ac274321 |
Dropped from:
Downloaded by:
Similar by SSDeep:
Similar by Lavasoft Polymorphic Checker:
Network Activity
URLs
IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)
Traffic
Map
The Trojan connects to the servers at the folowing location(s):
Strings from Dumps
rundll32.exe_1504:
.text
.text
`.data
`.data
.rsrc
.rsrc
msvcrt.dll
msvcrt.dll
KERNEL32.dll
KERNEL32.dll
NTDLL.DLL
NTDLL.DLL
GDI32.dll
GDI32.dll
USER32.dll
USER32.dll
IMAGEHLP.dll
IMAGEHLP.dll
rundll32.pdb
rundll32.pdb
.....eZXnnnnnnnnnnnn3
.....eZXnnnnnnnnnnnn3
....eDXnnnnnnnnnnnn3
....eDXnnnnnnnnnnnn3
...eDXnnnnnnnnnnnn,
...eDXnnnnnnnnnnnn,
.eDXnnnnnnnnnnnn,
.eDXnnnnnnnnnnnn,
%Xnnnnnnnnnnnnnnn1
%Xnnnnnnnnnnnnnnn1
O3$dS7"%U9
O3$dS7"%U9
.manifest
.manifest
5.1.2600.5512 (xpsp.080413-2105)
5.1.2600.5512 (xpsp.080413-2105)
RUNDLL.EXE
RUNDLL.EXE
Windows
Windows
Operating System
Operating System
5.1.2600.5512
5.1.2600.5512
YThere is not enough memory to run the file %s.
YThere is not enough memory to run the file %s.
Please close other windows and try again.
Please close other windows and try again.
9The file %s or one of its components could not be opened.
9The file %s or one of its components could not be opened.
0The file %s or one of its components cannot run.
0The file %s or one of its components cannot run.
MThe file %s or one of its components requires a different version of Windows.
MThe file %s or one of its components requires a different version of Windows.
UThe file %s or one of its components cannot run in standard or enhanced mode Windows.3Another instance of the file %s is already running./An exception occurred while trying to run "%s"
UThe file %s or one of its components cannot run in standard or enhanced mode Windows.3Another instance of the file %s is already running./An exception occurred while trying to run "%s"
Error in %s
Error in %s
Missing entry:%s
Missing entry:%s
Error loading %s
Error loading %s
rundll32.exe_1504_rwx_10001000_00D2B000:
.tTPV
.tTPV
^}•xy
^}•xy
FTPjK
FTPjK
FtPj;
FtPj;
F.PjRWj
F.PjRWj
u.WWj
u.WWj
u.VVj
u.VVj
portuguese-brazilian
portuguese-brazilian
user32.dll
user32.dll
zcÃ
zcÃ
- '%s'.
- '%s'.
GIF-LIB undefined error %d.
GIF-LIB undefined error %d.
GIF-LIB error: %s.
GIF-LIB error: %s.
%s: Null entry in quantized color map - that's weird.
%s: Null entry in quantized color map - that's weird.
GET /last2.php?id=%d HTTP/1.1
GET /last2.php?id=%d HTTP/1.1
Host: %s
Host: %s
EXCEPTION: addr=0xx, code=0xx; maindll base: 0xx, parent base: 0xx
EXCEPTION: addr=0xx, code=0xx; maindll base: 0xx, parent base: 0xx
ERROR: check_files failed (code %d)
ERROR: check_files failed (code %d)
ERROR: get_data_info failed (code %d)
ERROR: get_data_info failed (code %d)
ERROR: download_data failed (code %d)
ERROR: download_data failed (code %d)
NOTE: downloading %s
NOTE: downloading %s
hXXp://%s/%s
hXXp://%s/%s
NOTE: bases are ok (age: %d)
NOTE: bases are ok (age: %d)
maindll.dll
maindll.dll
riched20.dll
riched20.dll
81.95.148.188
81.95.148.188
66.197.156.5
66.197.156.5
81.95.149.10
81.95.149.10
81.95.149.2
81.95.149.2
65.111.175.129
65.111.175.129
%u.%u.%u.%u.IN-ADDR.ARPA
%u.%u.%u.%u.IN-ADDR.ARPA
PIPELINING
PIPELINING
EHLO %s
EHLO %s
HELO %s
HELO %s
RCPT TO:
RCPT TO:
MAIL FROM:
MAIL FROM:
aol.com
aol.com
verizon.net
verizon.net
ameritech.net
ameritech.net
cox.net
cox.net
rr.com
rr.com
adelphia.net
adelphia.net
comcast.net
comcast.net
optonline.net
optonline.net
=X
=X
[%d-%d]
[%d-%d]
NUMBER(%d-%d)
NUMBER(%d-%d)
STR_RNDLEN(%d-%d)
STR_RNDLEN(%d-%d)
d.d.d
d.d.d
d.d.d
d.d.d
%s, %d %s %d d:d:d % 03ld00
%s, %d %s %d d:d:d % 03ld00
127.0.0.1
127.0.0.1
Windows-1251
Windows-1251
Windows-1252
Windows-1252
XSMTPX
XSMTPX
%s\Microsoft\%d.dat
%s\Microsoft\%d.dat
%s\%d.dat
%s\%d.dat
Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders
Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders
%s %u%n
%s %u%n
rundll32.exe "%s",run
rundll32.exe "%s",run
Software\Microsoft\Windows\CurrentVersion\Run
Software\Microsoft\Windows\CurrentVersion\Run
Software\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad
Software\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad
DCOM Server %d
DCOM Server %d
{2C1CD3D7-86AC-4068-93BC-A02304B%d}
{2C1CD3D7-86AC-4068-93BC-A02304B%d}
Software\Microsoft\Windows\CurrentVersion\Explorer\SharedTaskScheduler
Software\Microsoft\Windows\CurrentVersion\Explorer\SharedTaskScheduler
SOFTWARE\Classes\CLSID\{2C1CD3D7-86AC-4068-93BC-A02304B%d}\InProcServer32
SOFTWARE\Classes\CLSID\{2C1CD3D7-86AC-4068-93BC-A02304B%d}\InProcServer32
hs5pdllv4%d
hs5pdllv4%d
rcpt to: %s
rcpt to: %s
127.0.0.1 %s
127.0.0.1 %s
VVV.symantec.com
VVV.symantec.com
securityresponse.symantec.com
securityresponse.symantec.com
symantec.com
symantec.com
VVV.sophos.com
VVV.sophos.com
sophos.com
sophos.com
VVV.mcafee.com
VVV.mcafee.com
mcafee.com
mcafee.com
liveupdate.symantecliveupdate.com
liveupdate.symantecliveupdate.com
VVV.viruslist.com
VVV.viruslist.com
viruslist.com
viruslist.com
f-secure.com
f-secure.com
VVV.f-secure.com
VVV.f-secure.com
downloads1.kaspersky-labs.com
downloads1.kaspersky-labs.com
downloads2.kaspersky-labs.com
downloads2.kaspersky-labs.com
downloads3.kaspersky-labs.com
downloads3.kaspersky-labs.com
downloads4.kaspersky-labs.com
downloads4.kaspersky-labs.com
kaspersky.com
kaspersky.com
VVV.avp.com
VVV.avp.com
VVV.kaspersky.com
VVV.kaspersky.com
avp.com
avp.com
VVV.networkassociates.com
VVV.networkassociates.com
networkassociates.com
networkassociates.com
VVV.ca.com
VVV.ca.com
ca.com
ca.com
mast.mcafee.com
mast.mcafee.com
my-etrust.com
my-etrust.com
VVV.my-etrust.com
VVV.my-etrust.com
download.mcafee.com
download.mcafee.com
dispatch.mcafee.com
dispatch.mcafee.com
secure.nai.com
secure.nai.com
nai.com
nai.com
VVV.nai.com
VVV.nai.com
update.symantec.com
update.symantec.com
updates.symantec.com
updates.symantec.com
liveupdate.symantec.com
liveupdate.symantec.com
customer.symantec.com
customer.symantec.com
rads.mcafee.com
rads.mcafee.com
trendmicro.com
trendmicro.com
VVV.trendmicro.com
VVV.trendmicro.com
us.mcafee.com
us.mcafee.com
Software\Classes\CLSID\{2C1CD3D7-86AC-4068-93BC-A02304BB8C34}
Software\Classes\CLSID\{2C1CD3D7-86AC-4068-93BC-A02304BB8C34}
140509033276
140509033276
%System%\rundll32.exe
%System%\rundll32.exe
GetCPInfo
GetCPInfo
RegOpenKeyExA
RegOpenKeyExA
RegCreateKeyExA
RegCreateKeyExA
RegDeleteKeyA
RegDeleteKeyA
RegCloseKey
RegCloseKey
EnumChildWindows
EnumChildWindows
EnumThreadWindows
EnumThreadWindows
.text
.text
.rdata
.rdata
@.data
@.data
.reloc
.reloc