possible-Threat.Keygen.Core!IK (Emsisoft), Backdoor.Win32.PcClient.FD, Worm.Win32.Ainslot.VB.FD, GenericAutorunWorm.YR, WormAinslot_VariantOfZeus.YR (Lavasoft MAS)Behaviour: Backdoor, Worm, WormAutorun
The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.
Summary
MD5: a3a51ad2e83d7050e0eb5b9525a7d064
SHA1: a8151fe034f3c44f52af92c87e3afc1a1cb943df
SHA256: 9e2f8cbfe95226047147946eecb4753c1f8957bcaa4a9d750f5af932eff030f9
SSDeep: 12288:zQ0MMKOj9COHzMBbzAOSrgz5W5AkVxj/w W5e36mtwfy4AMc:wML9vabzfz5yhvj/w Z3zY
Size: 657920 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: MicrosoftVisualC, NETexecutable, UPolyXv05_v6
Company: Firseria
Created at: 2013-06-12 00:49:05
Summary: Worm. A program that is primarily replicating on networks or removable drives.
Dynamic Analysis
Payload
Behaviour | Description |
---|---|
WormAutorun | A worm can spread via removable drives. It writes its executable and creates "autorun.inf" scripts on all removable drives. The autorun script will execute the Worm's file once a user opens a drive's folder in Windows Explorer. |
Process activity
The Worm creates the following process(es):
rundll32.exe:1116
%original file name%.exe:284
reg.exe:424
reg.exe:1612
reg.exe:1604
reg.exe:1576
dumprep.exe:1616
dumprep.exe:828
The Worm injects its code into the following process(es):
1425900376.EXE:360
File activity
The process %original file name%.exe:284 makes changes in the file system.
The Worm creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temp\1425900376.EXE (137 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\temp_ysBIjScqls\svchost.exe (7547 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\tmp1.tmp.exe (3730 bytes)
The Worm deletes the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temp\tmp1.tmp (0 bytes)
The process dumprep.exe:1616 makes changes in the file system.
The Worm creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temp\WER4b00.dir00\svchost.exe.mdmp (100867 bytes)
The process dumprep.exe:828 makes changes in the file system.
The Worm creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temp\WER4b00.dir00\svchost.exe.hdmp (222995 bytes)
Registry activity
The process rundll32.exe:1116 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "E9 0E 70 51 EA DD 6B 64 1A F9 D2 0C 5A F1 FB 37"
[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Documents and Settings%\%current user%\Local Settings\Temp\temp_ysBIjScqls]
"svchost.exe" = "Visual Basic Command Line Compiler"
[HKLM\System\CurrentControlSet\Control\Session Manager\AppCompatibility]
"AppCompatCache" = "EF BE AD DE 60 00 00 00 00 00 00 00 00 00 00 00"
[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers\%Documents and Settings%\%current user%\Local Settings\Temp\temp_ysBIjScqls]
"svchost.exe" = "EnableNXShowUI"
The process 1425900376.EXE:360 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "07 02 1A 25 C9 66 03 D5 90 72 D8 96 1A A1 71 5C"
The process %original file name%.exe:284 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "F2 A2 B5 3D 79 96 B4 E1 01 62 39 6D C1 F9 5D 26"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cookies" = "%Documents and Settings%\%current user%\Cookies"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Documents" = "%Documents and Settings%\All Users\Documents"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Desktop" = "%Documents and Settings%\%current user%\Desktop"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{b98117e8-75ca-11e2-81b2-000c293708fb}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Desktop" = "%Documents and Settings%\All Users\Desktop"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"
"Personal" = "%Documents and Settings%\%current user%\My Documents"
[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Documents and Settings%\%current user%\Local Settings\Temp]
"1425900376.EXE" = "1425900376"
To automatically run itself each time Windows is booted, the Worm adds the following link to its file to the system registry autorun key:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"system.exe" = "%Documents and Settings%\%current user%\Local Settings\Temp\tmp1.tmp.exe"
The Worm modifies IE settings for security zones to map all local web-nodes with no dots which do not refer to any zone to the Intranet Zone:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"UNCAsIntranet" = "1"
The Worm modifies IE settings for security zones to map all urls to the Intranet Zone:
"IntranetName" = "1"
The Worm modifies IE settings for security zones to map all web-nodes that bypassing proxy to the Intranet Zone:
"ProxyBypass" = "1"
The process reg.exe:424 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "66 35 DA 56 52 E0 11 1E A5 FA B0 59 38 4B 1A 05"
[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile]
"DoNotAllowExceptions" = "0"
The process reg.exe:1612 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "9A 32 13 17 E7 6D 16 15 33 29 C9 C0 A6 A3 F1 2B"
Adds a rule to the firewall Windows which allows any network activity:
[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\%Documents and Settings%\%current user%\Application Data]
"ZQPV2L7C2K.exe" = "%Documents and Settings%\%current user%\Application Data\ZQPV2L7C2K.exe:*:Enabled:Windows Messanger"
The process reg.exe:1604 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "D0 50 0F 25 BD 7B 37 79 D4 7B F7 D1 57 A9 DF F4"
[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile]
"DoNotAllowExceptions" = "0"
The process reg.exe:1576 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "37 F4 F5 8C 10 A2 74 6E F5 8F 04 C8 25 9A 10 FE"
Adds a rule to the firewall Windows which allows any network activity:
[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\%Documents and Settings%\%current user%\Local Settings\Temp\temp_ysBIjScqls]
"svchost.exe" = "%Documents and Settings%\%current user%\Local Settings\Temp\temp_ysBIjScqls\svchost.exe:*:Enabled:Windows Messanger"
The process dumprep.exe:1616 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "45 C8 AC 2C B8 A3 93 BD 21 89 57 B4 A3 C7 B5 3C"
The process dumprep.exe:828 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "AE C0 FF 01 FA 4C 3C 94 70 2B B7 92 F6 46 B2 11"
Network activity (URLs)
No activity has been detected.
HOSTS file anomalies
No changes have been detected.
Rootkit activity
No anomalies have been detected.
Propagation
A worm can spread via removable drives. It writes its executable and creates "autorun.inf" scripts on all removable drives. The autorun script will execute the Worm's file once a user opens a drive's folder in Windows Explorer.
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):
rundll32.exe:1116
%original file name%.exe:284
reg.exe:424
reg.exe:1612
reg.exe:1604
reg.exe:1576
dumprep.exe:1616
dumprep.exe:828 - Delete the original Worm file.
- Delete or disinfect the following files created/modified by the Worm:
%Documents and Settings%\%current user%\Local Settings\Temp\1425900376.EXE (137 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\temp_ysBIjScqls\svchost.exe (7547 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\tmp1.tmp.exe (3730 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\WER4b00.dir00\svchost.exe.mdmp (100867 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\WER4b00.dir00\svchost.exe.hdmp (222995 bytes) - Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"system.exe" = "%Documents and Settings%\%current user%\Local Settings\Temp\tmp1.tmp.exe" - Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
- Reboot the computer.