MD5: f85bf0be2e89fbe0806ad4f4f8c2e01c
SHA1: 014ec5ae70d5483a855d0740877eeadbfe08847d
SHA256: 89a985b717d072e8f5c869178db7bbb8d51fa781f0f8eb932e48edf53957aa80
SSDeep: 1536:OmL6BS7LL1BZ o9yHSmoZ5obCdcoLMomnI6c477NpYDe Hu07Xb:OFBon1BZJyHSsbONLMRnI6ckNpoX/
Size: 95744 bytes
File type: DLL
Platform: WIN32
Entropy: Packed
PEID: PolyEnE001byLennartHedlund, UPolyXv05_v6
Company: no certificate found
Created at: 2010-06-08 12:59:36
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).

Payload

No specific payload has been found.

Process activity

The DDoS creates the following process(es):

regsvr32.exe:240
hrl1.tmp:568

The DDoS injects its code into the following process(es):
No processes have been created.

File activity

The process regsvr32.exe:240 makes changes in the file system.
The DDoS creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\hrl1.tmp (88 bytes)

The process hrl1.tmp:568 makes changes in the file system.
The DDoS creates and/or writes to the following file(s):

%System%\uuccug.exe (601 bytes)

Registry activity

The process regsvr32.exe:240 makes changes in the system registry.
The DDoS creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "C2 87 8B 17 A0 06 48 09 9A C0 CF 97 F0 45 EC D8"

The process hrl1.tmp:568 makes changes in the system registry.
The DDoS creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "A4 F6 13 B0 B2 87 C2 62 58 3E 93 49 2F 4C 76 73"

Network activity (URLs)

No activity has been detected.

HOSTS file anomalies

The DDoS modifies "%System%\drivers\etc\hosts" file which is used to translate DNS entries to IP addresses.
The modified file is 734 bytes in size. The following strings are added to the hosts file listed below:

Rootkit activity

The DDoS installs the following user-mode hooks in ntdll.dll:

NtQueryInformationProcess
ZwOpenFile
NtCreateProcessEx
NtCreateProcess
NtCreateFile

Propagation

Remove it with Ad-Aware

1. Click (here) to download and install Ad-Aware Free Antivirus.
2. Update the definition files.
3. Run a full scan of your computer.

Manual removal*

1. Scan a system with an anti-rootkit tool.
   
2. Terminate malicious process(es) (How to End a Process With the Task Manager):
   

   regsvr32.exe:240
   hrl1.tmp:568

3. Delete the original DDoS file.
   
4. Delete or disinfect the following files created/modified by the DDoS:
   

   %Documents and Settings%\%current user%\Local Settings\Temp\hrl1.tmp (88 bytes)
   %System%\uuccug.exe (601 bytes)

5. Restore the original content of the HOSTS file (%System%\drivers\etc\hosts):
   127.0.0.1 localhost
   
6. Reboot the computer.
   

*Manual removal may cause unexpected system behaviour and should be performed at your own risk.