Trojan.Win32.Scar.hslu (Kaspersky), Trojan.Win32.Buzus.ckzu (v) (VIPRE), GenericAutorunWorm.YR (Lavasoft MAS)Behaviour: Trojan, Worm, WormAutorun
The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.
Summary
MD5: 7ce13b49bdc90bc2add2388183d4ee78
SHA1: e60b6f1194bbb188775547d89a44667bc88e9992
SHA256: 063d47ba5cb5f54d544b4677a341de33b0ffd3ab1302ea9d9cfe622fc14117b3
SSDeep: 3072:hqOHjyAc//////jCwo0icTt/q7iqAw05ebJcz1DGqISKjhCIBD5Xq613a0eSwyvE:oOHTc//////X1kmcRb6zBzO4I7X5JaP3
Size: 176282 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: BorlandDelphi30, BorlandDelphiv30, UPolyXv05_v6
Company: ApPure
Created at: 1992-06-20 01:22:17
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
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 Trojan's file once a user opens a drive's folder in Windows Explorer. |
Process activity
The Trojan creates the following process(es):
f3ahvoas.exe:384
%original file name%.exe:132
%original file name%.exe:1060
reg.exe:212
reg.exe:888
reg.exe:500
reg.exe:1008
reg.exe:496
reg.exe:1416
iexplore.exe:468
faultrep.exe:220
The Trojan injects its code into the following process(es):No processes have been created.
File activity
The process f3ahvoas.exe:384 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):
%System%\_Setup.bat (580 bytes)
The process %original file name%.exe:132 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):
%System%\c_l4946.nls (1554 bytes)
%System%\faultrep.exe (70 bytes)
%System%\_Setup.bat (580 bytes)
The process %original file name%.exe:1060 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):
%System%\uret463.exe (673 bytes)
%System%\drivers\klif.sys (3 bytes)
%System%\lhgjyit0.dll (127 bytes)
The Trojan deletes the following file(s):
%System%\drivers\klif.sys (0 bytes)
The process faultrep.exe:220 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):
%System%\fmifs.nls (464 bytes)
%System%\f3ahvoas.exe (601 bytes)
%System%\filemgmt.nls (4 bytes)
%System%\_Setup.bat (580 bytes)
Registry activity
The process f3ahvoas.exe:384 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "0E A7 3C 07 AB D5 00 A2 C4 72 E1 D6 65 F6 28 4A"
The process %original file name%.exe:132 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "30 A9 10 66 37 24 98 C4 77 16 53 D3 9D 98 F1 7B"
The process %original file name%.exe:1060 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\System\CurrentControlSet\Services\KAVsys]
"Type" = "1"
"ImagePath" = "\??\%System%\drivers\klif.sys"
"ErrorControl" = "1"
The following driver will be automatically launched by the NT Native code (IoInitSystem method):
[HKLM\System\CurrentControlSet\Services\KAVsys]
"Start" = "1"
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]
"dorfgwe" = "%System%\uret463.exe"
The Trojan deletes the following registry key(s):
[HKLM\System\CurrentControlSet\Services\KAVsys]
The process reg.exe:212 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "E7 08 E9 10 AF 9A 0B 4F E4 A8 2B 54 AD 00 2A 51"
[HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components\{L7TJ3YO2-Z299-96B6-J553-1X86390KS5G5}]
"StubPath" = "%System%\cmd.exe /c %System%\faultrep.exe /i"
The process reg.exe:888 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "91 AB 44 8A 0C B3 35 17 16 41 BD DB 9E 4D 07 96"
The process reg.exe:500 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "18 C5 A6 0D A9 5C 16 4A 40 83 39 25 1F 2C 9B 60"
[HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components\{L7TJ3YO2-Z299-96B6-J553-1X86390KS5G5}]
"StubPath" = "%System%\cmd.exe /c %System%\faultrep.exe /i"
The process reg.exe:1008 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "A5 4C 99 73 58 97 7A 96 22 34 F7 2F B4 19 A0 29"
The process reg.exe:496 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "8D 4A 91 F1 D7 BE F2 1C 0A E1 0F 1D 11 D8 B9 15"
[HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components\{L7TJ3YO2-Z299-96B6-J553-1X86390KS5G5}]
"StubPath" = "%System%\cmd.exe /c %System%\faultrep.exe /i"
The process reg.exe:1416 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "AB FC 51 75 47 B3 4C ED A9 BF 1E EB 08 9D 1A 23"
The process iexplore.exe:468 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[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\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\path2]
"CacheLimit" = "65452"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
"Cookies" = "%Documents and Settings%\%current user%\Cookies"
[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\Explorer\Shell Folders]
"Common AppData" = "%Documents and Settings%\All Users\Application Data"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"
[HKLM\System\CurrentControlSet\Hardware Profiles\0001\Software\Microsoft\windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CacheLimit" = "65452"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections]
"SavedLegacySettings" = "3C 00 00 00 1B 00 00 00 01 00 00 00 00 00 00 00"
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "9E C9 92 D8 82 C3 FC A2 0A 2E BB 25 36 60 7A DE"
[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"
[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\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"
The Trojan 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 Trojan modifies IE settings for security zones to map all web-nodes that bypassing proxy to the Intranet Zone:
"ProxyBypass" = "1"
Proxy settings are disabled:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"
The Trojan modifies IE settings for security zones to map all urls to the Intranet Zone:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"IntranetName" = "1"
The Trojan deletes the following value(s) in system registry:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"AutoConfigURL"
"ProxyServer"
"ProxyOverride"
The process faultrep.exe:220 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "69 E4 D4 7A 1C EA F8 D7 CE 7C 68 68 ED 93 F3 84"
Network activity (URLs)
URL | IP |
---|---|
hxxp://qwer5.homelinux.com/config2.asp?id=A8A67A25 | 184.72.54.44 |
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 Trojan'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):
f3ahvoas.exe:384
%original file name%.exe:132
%original file name%.exe:1060
reg.exe:212
reg.exe:888
reg.exe:500
reg.exe:1008
reg.exe:496
reg.exe:1416
iexplore.exe:468
faultrep.exe:220 - Delete the original Trojan file.
- Delete or disinfect the following files created/modified by the Trojan:
%System%\_Setup.bat (580 bytes)
%System%\c_l4946.nls (1554 bytes)
%System%\faultrep.exe (70 bytes)
%System%\uret463.exe (673 bytes)
%System%\drivers\klif.sys (3 bytes)
%System%\lhgjyit0.dll (127 bytes)
%System%\fmifs.nls (464 bytes)
%System%\f3ahvoas.exe (601 bytes)
%System%\filemgmt.nls (4 bytes) - Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"dorfgwe" = "%System%\uret463.exe" - Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
- Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
- Reboot the computer.