Trojan.Win32.Fsysna.fkv (Kaspersky), Backdoor.Win32.DarkKomet!IK (Emsisoft), Backdoor.Win32.PcClient.FD, Worm.Win32.Ainslot.VB.FD, GenericAutorunWorm.YR, WormAinslot_VariantOfZeus.YR (Lavasoft MAS)Behaviour: Trojan, Backdoor, Worm, WormAutorun
The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.
Summary
MD5: 150f06819a803697ec3e4b87a2cf0dff
SHA1: 7acf5c2962de00a98b4082b19d06335be462d60a
SHA256: d3a05028fec14b21df7871388ea920f275b73c392b5444dda9344421d75421dd
SSDeep: 6144:uEmjqXWwZH33aNCAVSNRwqBfccEHR8ez/5YTR9JNZJRQ937e12:uzc5oCAeRllEHtG9JNvRc37e
Size: 323584 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: MicrosoftVisualC, NETexecutable, UPolyXv05_v6
Company: no certificate found
Created at: 2013-08-31 17:12:25
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):
reg.exe:1340
reg.exe:1520
reg.exe:1356
reg.exe:1808
rundll32.exe:472
dumprep.exe:1140
dumprep.exe:448
The Worm injects its code into the following process(es):
%original file name%.exe:356
File activity
The process dumprep.exe:1140 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\WER2df2.dir00\svchost.exe.hdmp (219427 bytes)
The process dumprep.exe:448 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\WER2df2.dir00\svchost.exe.mdmp (100035 bytes)
The process %original file name%.exe:356 makes changes in the file system.
The Worm creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Local Settings\Application Data\FKpbYQmi\1Ru1wBFWv.exe (323 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\xcoca.ine (7547 bytes)
Registry activity
The process reg.exe:1340 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "A6 7A AE A3 59 0E E8 EA 6A A1 D4 D3 47 53 ED FD"
[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile]
"DoNotAllowExceptions" = "0"
The process reg.exe:1520 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "04 9C 5D 82 B5 AC B7 CE D4 8A 9C 5C ED 65 8C 70"
[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile]
"DoNotAllowExceptions" = "0"
The process reg.exe:1356 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "BB 8B E4 D8 9B 66 2B F2 BF B5 6E 63 D1 F4 45 4F"
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]
"svchost.exe" = "%Documents and Settings%\%current user%\Local Settings\Temp\svchost.exe:*:Enabled:Windows Messanger"
The process reg.exe:1808 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "39 09 5F E1 57 0C BB 97 E2 24 A6 D7 CB 99 0B B6"
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]
"VLU09HKAVN.exe" = "%Documents and Settings%\%current user%\Application Data\VLU09HKAVN.exe:*:Enabled:Windows Messanger"
The process rundll32.exe:472 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "3E 68 81 73 41 A9 69 74 AC 1C C5 AF 23 90 9F 69"
[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers\%Documents and Settings%\%current user%\Local Settings\Temp]
"svchost.exe" = "EnableNXShowUI"
[HKLM\System\CurrentControlSet\Control\Session Manager\AppCompatibility]
"AppCompatCache" = "EF BE AD DE 60 00 00 00 00 00 00 00 00 00 00 00"
[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Documents and Settings%\%current user%\Local Settings\Temp]
"svchost.exe" = "Visual Basic Command Line Compiler"
The process dumprep.exe:1140 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "4F 86 0E 68 E9 99 6A 1F 82 72 42 86 68 23 A8 20"
The process dumprep.exe:448 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "06 D2 7A D6 D9 45 C5 B7 2F 38 01 95 FE B5 B0 47"
The process %original file name%.exe:356 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "99 9A C3 30 32 8D E7 33 A8 C2 39 F6 F1 D9 64 66"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
"Local AppData" = "%Documents and Settings%\%current user%\Local Settings\Application Data"
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"
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]
"1Ru1wBFWv" = "%Documents and Settings%\%current user%\Local Settings\Application Data\FKpbYQmi\1Ru1wBFWv.exe"
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):
reg.exe:1340
reg.exe:1520
reg.exe:1356
reg.exe:1808
rundll32.exe:472
dumprep.exe:1140
dumprep.exe:448 - Delete the original Worm file.
- Delete or disinfect the following files created/modified by the Worm:
%Documents and Settings%\%current user%\Local Settings\Temp\WER2df2.dir00\svchost.exe.hdmp (219427 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\WER2df2.dir00\svchost.exe.mdmp (100035 bytes)
%Documents and Settings%\%current user%\Local Settings\Application Data\FKpbYQmi\1Ru1wBFWv.exe (323 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\xcoca.ine (7547 bytes) - Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"1Ru1wBFWv" = "%Documents and Settings%\%current user%\Local Settings\Application Data\FKpbYQmi\1Ru1wBFWv.exe" - Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
- Reboot the computer.