Trojan.Win32.Inject.bbyo (Kaspersky), Gen:Variant.Razy.15441 (B) (Emsisoft), Gen:Variant.Razy.15441 (AdAware), Backdoor.Win32.Simbot.FD, BackdoorSimbot.YR (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: dee4cfafca168eb9b065b1269ccb8b6a
SHA1: 579523329b2e9e894c5388e640362081b8424bf5
SHA256: 0810468469773425bc1bb239951dcbb9286db5b354bc6d877f3b65f9b0f86995
SSDeep: 384:JszLGoc1H8sQjiu2D0qrcEr3d7dBpymO89dY8bqQybPp1mHZ:Jsz7c1H8sd1DX7p79dY8bqQI3k
Size: 27648 bytes
File type: EXE
Platform: WIN32
Entropy: Not Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2011-01-20 02:38:21
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):
regedit.exe:664
%original file name%.exe:1152
The Trojan injects its code into the following process(es):
svchost.exe:912
Mutexes
The following mutexes were created/opened:No objects were found.
File activity
The process %original file name%.exe:1152 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Application Data\Microsoft\Crypto\RSA\S-1-5-21-1844237615-1960408961-1801674531-1003\c5b88721db08c824db69d0bbc702beb8_75ed9567-aa58-4c8e-a8ea-3cad7c47ab03 (44 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\4$@2.dat (48 bytes)
C:\%original file name%.exe.tmp1 (1780 bytes)
Registry activity
The process regedit.exe:664 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "88 36 29 CD AB BE 36 20 11 89 9B 13 AA E2 2F 5C"
To automatically run itself each time Windows is booted, the Trojan adds the following link to its file to the system registry autorun key:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"clr_optimization_v4.0.30319_32" = "%Documents and Settings%\%current user%\Local Settings\clr_optimization_v4.0.30319_32.exe"
The process %original file name%.exe:1152 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "73 77 B1 BA 83 33 57 7E FB 41 25 25 C1 A2 CA A1"
Dropped PE files
MD5 | File path |
---|---|
164ff6b90393e5f250cdb84f71b4d456 | c:\Documents and Settings\"%CurrentUserName%"\Local Settings\clr_optimization_v4.0.30319_32.exe |
HOSTS file anomalies
No changes have been detected.
Rootkit activity
No anomalies have been detected.
Propagation
Removals
Remove it with Ad-Aware
- Click (here) to download and install Ad-Aware Free Antivirus.
- Update the definition files.
- Run a full scan of your computer.
Manual removal*
- Terminate malicious process(es) (How to End a Process With the Task Manager):
regedit.exe:664
%original file name%.exe:1152 - Delete the original Trojan file.
- Delete or disinfect the following files created/modified by the Trojan:
%Documents and Settings%\%current user%\Application Data\Microsoft\Crypto\RSA\S-1-5-21-1844237615-1960408961-1801674531-1003\c5b88721db08c824db69d0bbc702beb8_75ed9567-aa58-4c8e-a8ea-3cad7c47ab03 (44 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\4$@2.dat (48 bytes)
C:\%original file name%.exe.tmp1 (1780 bytes) - Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"clr_optimization_v4.0.30319_32" = "%Documents and Settings%\%current user%\Local Settings\clr_optimization_v4.0.30319_32.exe" - Reboot the computer.
Static Analysis
VersionInfo
Company Name: Adobe Systems, Inc.
Product Name: Flash? Player Installer/Uninstaller
Product Version: 10,1,53,64
Legal Copyright: Copyright ? 1996-2010 Adobe, Inc.
Legal Trademarks: Adobe? Flash? Player
Original Filename: FlashUtil.exe
Internal Name: Adobe? Flash? Player Installer/Uninstaller 10.1
File Version: 10,1,53,64
File Description: Adobe? Flash? Player Installer/Uninstaller 10.1 r53
Comments:
Language: English (United States)
Company Name: Adobe Systems, Inc.Product Name: Flash? Player Installer/UninstallerProduct Version: 10,1,53,64Legal Copyright: Copyright ? 1996-2010 Adobe, Inc.Legal Trademarks: Adobe? Flash? PlayerOriginal Filename: FlashUtil.exeInternal Name: Adobe? Flash? Player Installer/Uninstaller 10.1File Version: 10,1,53,64File Description: Adobe? Flash? Player Installer/Uninstaller 10.1 r53Comments: Language: English (United States)
PE Sections
Name | Virtual Address | Virtual Size | Raw Size | Entropy | Section MD5 |
---|---|---|---|---|---|
.text | 4096 | 22760 | 23040 | 5.08945 | 8227a32054989558c5d54e6b5b2efcf6 |
.rdata | 28672 | 1028 | 1536 | 2.44349 | 42595f358d82ed008b0da3cc81ff353d |
.data | 32768 | 931 | 512 | 2.48951 | f79df4c7bdf90017d9ab69db5221470d |
.rsrc | 36864 | 1136 | 1536 | 1.84173 | b5ed7b029bc65184d8f3a398fb854e6d |
Dropped from:
Downloaded by:
Similar by SSDeep:
Similar by Lavasoft Polymorphic Checker:
Total found: 19
d7b175c4994714b2b8545dc1991dba02
d73291ba669b49bcb87bf2b37cb935d0
a69e9b12be42752aaba0b18a9ae06483
b80c0ac3e473db260da901206c2fb5c5
2ca798c49939cbaea17868b537109bb0
29ae66a29ee57abaef55627d4c46e620
047211416ceb896c6a78727d12ef3020
ff92c245af33c097ecb3ecec3bffd393
e6d39f539be3330e2a19da1fd796b1dd
e57e42ec25c2f6d40c0dd707acd10a76
02506ce80526e116ce887e57df6592ea
019ce6f574e3bbd9ca4f77ba182cc0b4
14f6158aa696f3521cbee17001e55a41
15e5c0a8f396c5df3b3241c173fd04d0
afa0b769dcaa0630a654b7ceb69aafd0
d99a5fa84fe6aa27e279c2d55433a47d
a6007c60befe053f8521ae15de7c370b
a4e3d511d52771d61d4b67a782f07cfb
ac23bfa013bdfdd3624274c0454dda4a
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
svchost.exe_912:
.text
.text
`.rdata
`.rdata
@.data
@.data
SSh@C@
SSh@C@
MFC42.DLL
MFC42.DLL
MSVCRT.dll
MSVCRT.dll
_acmdln
_acmdln
WinExec
WinExec
KERNEL32.dll
KERNEL32.dll
USER32.dll
USER32.dll
ADVAPI32.dll
ADVAPI32.dll
HttpQueryInfoA
HttpQueryInfoA
InternetOpenUrlA
InternetOpenUrlA
HttpSendRequestA
HttpSendRequestA
HttpOpenRequestA
HttpOpenRequestA
WININET.dll
WININET.dll
WS2_32.dll
WS2_32.dll
iphlpapi.dll
iphlpapi.dll
SHLWAPI.dll
SHLWAPI.dll
211.234.117.132
211.234.117.132
intweb.mobwork.net
intweb.mobwork.net
regedit.exe /s
regedit.exe /s
~dfds3.reg
~dfds3.reg
Windows Registry Editor Version 5.00
Windows Registry Editor Version 5.00
"%s"="%s"
"%s"="%s"
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
WinHttp
WinHttp
%s.tmp1
%s.tmp1
4$@2.dat
4$@2.dat
hXXp://%s:%d/%s.php?id=d%s&ext=%s
hXXp://%s:%d/%s.php?id=d%s&ext=%s
/%s.php?id=d%s&ext=%s
/%s.php?id=d%s&ext=%s
hXXp://%s:%d/%s.php?id=d%s
hXXp://%s:%d/%s.php?id=d%s
%c%c%c%c%c
%c%c%c%c%c
/%s.php?id=d%s
/%s.php?id=d%s
%%temp%%\%u
%%temp%%\%u
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)
Content-Type: application/x-www-form-urlencoded
Content-Type: application/x-www-form-urlencoded
HTTP/1.1
HTTP/1.1
X-X-X-X-X-X
X-X-X-X-X-X
01-01-01-01-01-01
01-01-01-01-01-01
%c%c%c%c%c%c.exe
%c%c%c%c%c%c.exe
svchost.exe_912_rwx_00400000_00005000:
.text
.text
`.rdata
`.rdata
@.data
@.data
SSh@C@
SSh@C@
MFC42.DLL
MFC42.DLL
MSVCRT.dll
MSVCRT.dll
_acmdln
_acmdln
WinExec
WinExec
KERNEL32.dll
KERNEL32.dll
USER32.dll
USER32.dll
ADVAPI32.dll
ADVAPI32.dll
HttpQueryInfoA
HttpQueryInfoA
InternetOpenUrlA
InternetOpenUrlA
HttpSendRequestA
HttpSendRequestA
HttpOpenRequestA
HttpOpenRequestA
WININET.dll
WININET.dll
WS2_32.dll
WS2_32.dll
iphlpapi.dll
iphlpapi.dll
SHLWAPI.dll
SHLWAPI.dll
211.234.117.132
211.234.117.132
intweb.mobwork.net
intweb.mobwork.net
regedit.exe /s
regedit.exe /s
~dfds3.reg
~dfds3.reg
Windows Registry Editor Version 5.00
Windows Registry Editor Version 5.00
"%s"="%s"
"%s"="%s"
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
WinHttp
WinHttp
%s.tmp1
%s.tmp1
4$@2.dat
4$@2.dat
hXXp://%s:%d/%s.php?id=d%s&ext=%s
hXXp://%s:%d/%s.php?id=d%s&ext=%s
/%s.php?id=d%s&ext=%s
/%s.php?id=d%s&ext=%s
hXXp://%s:%d/%s.php?id=d%s
hXXp://%s:%d/%s.php?id=d%s
%c%c%c%c%c
%c%c%c%c%c
/%s.php?id=d%s
/%s.php?id=d%s
%%temp%%\%u
%%temp%%\%u
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)
Content-Type: application/x-www-form-urlencoded
Content-Type: application/x-www-form-urlencoded
HTTP/1.1
HTTP/1.1
X-X-X-X-X-X
X-X-X-X-X-X
01-01-01-01-01-01
01-01-01-01-01-01
%c%c%c%c%c%c.exe
%c%c%c%c%c%c.exe