ThreatExpert Report: Trojan.Downexec.H!inf, Trojan.Win32.Patched.mi, PTCH

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Submission Summary:

Submission details:

Submission received: 24 September 2012, 20:18:16
Processing time: 8 min 25 sec
Submitted sample:

File MD5: 0x366B17C2E5D323A63221A0165093B050
File SHA-1: 0x43ADC0816DB71750E60C368A46D468FA2718B55E
Filesize: 224,741 bytes
Alias:

Trojan.Downexec.H!inf [Symantec]
Trojan.Win32.Patched.mi [Kaspersky Lab]
PTCH_ATHEN.A [Trend Micro]
Mal/EncPk-VU [Sophos]
Trojan:Win32/Oficla.E [Microsoft]
Trojan-Downloader.Win32.Small [Ikarus]

Technical Details:

Possible Security Risk

Attention! The following threat categories were identified:

Threat Category	Description
	A malicious trojan horse or bot that may represent security risk for the compromised system and/or its network environment
	A program that downloads files to the local computer that may represent security risk

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%Temp%\2.tmp %System%\bfwc.bwo	26,113 bytes	MD5: 0x38DDA1A7A6929EBB2B7F6049DBA3BC3B SHA-1: 0x802E85082E870BCBC9BCC649EAD374BFE95FE3EA	Trojan.Sasfis [Symantec] Trojan.Win32.Genome.gpms [Kaspersky Lab] BackDoor-ELD [McAfee] Mal/Sasfis-D [Sophos] Trojan:Win32/Oficla.E [Microsoft] Trojan.Win32.Oficla [Ikarus] Win-Trojan/Oficla.26113.B [AhnLab]
2	%Temp%\service.exe %System%\CbEvtSvc.exe	86,016 bytes	MD5: 0x41EE2E684412DD01B310D8C1C51E62EC SHA-1: 0x1896306EF922423E8CFB15CCE51EB1EABD437D0D	Trojan.Gen [Symantec] Trojan-Downloader.Win32.Exchanger.bcz [Kaspersky Lab] Generic.dx!umt [McAfee] TrojanDownloader:Win32/Cbeplay.B [Microsoft] Trojan-Downloader.Win32.Exchanger [Ikarus] Win-Trojan/Agent.86016.AER [AhnLab]
3	%Temp%\{F266D786-784C-47A5-CB73-736FC6CEACAF}.tmp	99,840 bytes	MD5: 0x726688F25ECB43DB4D16266859C0B0A8 SHA-1: 0x9C601DAA4CE509329754605D94B69CF90A64CFED	Trojan.Gen [Symantec] Trojan-Dropper.Win32.Agent.bpog [Kaspersky Lab] Mal/Rimecud-I [Sophos] TrojanDownloader:Win32/Cbeplay.B [Microsoft] Trojan-Dropper.Agent [Ikarus] Dropper/Agent.99840.Y [AhnLab]
4	[file and pathname of the sample #1]	224,741 bytes	MD5: 0x366B17C2E5D323A63221A0165093B050 SHA-1: 0x43ADC0816DB71750E60C368A46D468FA2718B55E	Trojan.Downexec.H!inf [Symantec] Trojan.Win32.Patched.mi [Kaspersky Lab] PTCH_ATHEN.A [Trend Micro] Mal/EncPk-VU [Sophos] Trojan:Win32/Oficla.E [Microsoft] Trojan-Downloader.Win32.Small [Ikarus]

Notes:

%Temp% is a variable that refers to the temporary folder in the short path form. By default, this is C:\Documents and Settings\[UserName]\Local Settings\Temp\ (Windows NT/2000/XP).
%System% is a variable that refers to the System folder. By default, this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).

Memory Modifications

There were new processes created in the system:

Process Name	Process Filename	Main Module Size
[filename of the sample #1]	[file and pathname of the sample #1]	238,053 bytes
service.exe	%Temp%\service.exe	90,112 bytes
{F266D786-784C-47A5-CB73-736FC6CEACAF}.tmp	%Temp%\{F266D786-784C-47A5-CB73-736FC6CEACAF}.tmp	111,104 bytes

Attention! The following process was intentionally hidden from the user:

Process Name	Main Module Size
CbEvtSvc.exe	90,112 bytes

Registry Modifications

The following Registry Keys were created:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\idid
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_CBEVTSVC
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_CBEVTSVC\0000
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_CBEVTSVC\0000\Control
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\CbEvtSvc
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\CbEvtSvc\Security
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\CbEvtSvc\Enum
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_CBEVTSVC
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_CBEVTSVC\0000
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_CBEVTSVC\0000\Control
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CbEvtSvc
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CbEvtSvc\Security
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CbEvtSvc\Enum

The newly created Registry Values are:

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\idid]

url0 = F8 9B 20 62 FC 48 D0 32 3C FC 17 F1 91 51 EA 3F F3 81 7B 7F AA 03 D0 3D 27 BE 08 F8 85 34 44 87 93 4A AC F9 FA 3D 3C 89 30 75 27 FF 60 6A BB 29

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_CBEVTSVC\0000\Control]

*NewlyCreated* = 0x00000000
ActiveService = "CbEvtSvc"

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_CBEVTSVC\0000]

Service = "CbEvtSvc"
Legacy = 0x00000001
ConfigFlags = 0x00000000
Class = "LegacyDriver"
ClassGUID = "{8ECC055D-047F-11D1-A537-0000F8753ED1}"
DeviceDesc = "CbEvtSvc"

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_CBEVTSVC]

NextInstance = 0x00000001

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\CbEvtSvc\Enum]

0 = "Root\LEGACY_CBEVTSVC\0000"
Count = 0x00000001
NextInstance = 0x00000001

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\CbEvtSvc\Security]

Security = 01 00 14 80 90 00 00 00 9C 00 00 00 14 00 00 00 30 00 00 00 02 00 1C 00 01 00 00 00 02 80 14 00 FF 01 0F 00 01 01 00 00 00 00 00 01 00 00 00 00 02 00 60 00 04 00 00 00 00 00 14 00 FD 01 02 00 01 01 00 00 00 00 00 05 12 00 00 00 00 00 18 00 FF 01 0F 0

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\CbEvtSvc]

Type = 0x00000010
Start = 0x00000002
ErrorControl = 0x00000001
ImagePath = "%System%\CbEvtSvc.exe -k netsvcs"
DisplayName = "CbEvtSvc"
ObjectName = "LocalSystem"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_CBEVTSVC\0000\Control]

*NewlyCreated* = 0x00000000
ActiveService = "CbEvtSvc"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_CBEVTSVC\0000]

Service = "CbEvtSvc"
Legacy = 0x00000001
ConfigFlags = 0x00000000
Class = "LegacyDriver"
ClassGUID = "{8ECC055D-047F-11D1-A537-0000F8753ED1}"
DeviceDesc = "CbEvtSvc"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_CBEVTSVC]

NextInstance = 0x00000001

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CbEvtSvc\Enum]

0 = "Root\LEGACY_CBEVTSVC\0000"
Count = 0x00000001
NextInstance = 0x00000001

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CbEvtSvc\Security]

Security = 01 00 14 80 90 00 00 00 9C 00 00 00 14 00 00 00 30 00 00 00 02 00 1C 00 01 00 00 00 02 80 14 00 FF 01 0F 00 01 01 00 00 00 00 00 01 00 00 00 00 02 00 60 00 04 00 00 00 00 00 14 00 FD 01 02 00 01 01 00 00 00 00 00 05 12 00 00 00 00 00 18 00 FF 01 0F 0

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CbEvtSvc]

Type = 0x00000010
Start = 0x00000002
ErrorControl = 0x00000001
ImagePath = "%System%\CbEvtSvc.exe -k netsvcs"
DisplayName = "CbEvtSvc"
ObjectName = "LocalSystem"

The following Registry Values were modified:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]

Shell =

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\ServiceCurrent]

(Default) =

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\ServiceCurrent]

(Default) =

Other details

The following Host Names were requested from a host database:

192.5.5.241
myloader.cn

The following HTTP URLs were started reading:

http://myloader.cn/mld/bb.php?id=&v=200&tm=1&b=bot
http://myloader.cn/mld/bb.php?id=&v=200&tm=2&b=bot
http://myloader.cn/mld/bb.php?id=&v=200&tm=3&b=bot

The following Internet download was started (the retrieved bits are saved into the local file):

URL to be downloaded	Filename for the downloaded bits
http://heathen.cc:3126/e.php	a.exe

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