MD5: 05f94851485bbbc3282437dd1169174d
SHA1: bc4ce0fdd378e5e45ff24c5dd582cd7e26c8bc8a
SHA256: 50066463dadf3e2b1f998fb69cb3dc3e3cb2da58cef7e3f777d6d77f0c2d35d3
SSDeep: 6144:BWl5v8fBawnjjBLTGBuertkFffhmzXhDluYLdh4vCz9UWkV74FxTYkxe/J3Hg6j:BWlN8fB5jjyqFf5k1lqvsg744kUG6j
Size: 364544 bytes
File type: EXE
Platform: WIN32
Entropy: Not Packed
PEID: InstallShield2000, MicrosoftVisualC, MicrosoftVisualCv50v60MFC, MicrosoftVisualC50, Armadillov171, UPolyXv05_v6
Company: AirInstaller
Created at: 2022-12-29 23:49:54
Analyzed on: WindowsXP SP3 32-bit

Summary:

Backdoor. Malware that enables a remote control of victim's machine.

Payload

No specific payload has been found.

Process activity

The Backdoor creates the following process(es):

%original file name%.exe:1112

The Backdoor injects its code into the following process(es):

Explorer.EXE:128

File activity

The process %original file name%.exe:1112 makes changes in the file system.
The Backdoor creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Application Data\Sun\Java\Deployment\SystemCache\6.0\0\dmadmin.exe (2469 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\NTUSER.DAT.LOG (5288 bytes)
%Documents and Settings%\%current user%\NTUSER.DAT (5844 bytes)

Registry activity

The process %original file name%.exe:1112 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "03 80 E7 C6 97 B2 91 A7 F8 EB 8F D5 1A A2 D8 92"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cookies" = "%Documents and Settings%\%current user%\Cookies"

[HKLM\System\CurrentControlSet\Hardware Profiles\0001\Software\Microsoft\windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"

[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\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"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CacheLimit" = "65452"

[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]
"Directory" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common AppData" = "%Documents and Settings%\All Users\Application Data"

[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"

[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"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections]
"SavedLegacySettings" = "3C 00 00 00 17 00 00 00 01 00 00 00 00 00 00 00"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CacheLimit" = "65452"

To automatically run itself each time Windows is booted, the Backdoor adds the following link to its file to the system registry autorun key:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"/9uTf9hjJ6bzu3WSYQ==" = "%Documents and Settings%\%current user%\Application Data\Sun\Java\Deployment\SystemCache\6.0\0\dmadmin.exe"

Proxy settings are disabled:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"

The Backdoor deletes the following value(s) in system registry:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"AutoConfigURL"
"ProxyServer"
"ProxyOverride"

Dropped PE files

There are no dropped PE files.

HOSTS file anomalies

No changes have been detected.

Rootkit activity

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

NtQueryDirectoryFile

Propagation

VersionInfo

Company Name:
Product Name:
Product Version:
Legal Copyright:
Legal Trademarks:
Original Filename:
Internal Name:
File Version:
File Description:
Comments:
Language: English (United States)

PE Sections

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

URLs

No activity has been detected.

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

ET POLICY DNS Query for .su TLD (Soviet Union) Often Malware Related

Traffic

Web Traffic was not found.

The Backdoor connects to the servers at the folowing location(s):

1.2.3

HttpSendRequestExA

HttpSendRequestExW

FTPQ

l.dlf

?SSSSSSh

MSVCRT.dll

%Documents and Settings%\%current user%\Application Data\Sun\Java\Deployment\SystemCache\6.0\0\dmadmin.exe

.clNz

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):
   

   %original file name%.exe:1112
   

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

   %Documents and Settings%\%current user%\Application Data\Sun\Java\Deployment\SystemCache\6.0\0\dmadmin.exe (2469 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
   %Documents and Settings%\%current user%\NTUSER.DAT.LOG (5288 bytes)
   

5. Delete the following value(s) in the autorun key (How to Work with System Registry):
   

   [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   "/9uTf9hjJ6bzu3WSYQ==" = "%Documents and Settings%\%current user%\Application Data\Sun\Java\Deployment\SystemCache\6.0\0\dmadmin.exe"

6. Reboot the computer.
   

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