HEUR:Trojan.Win32.Generic (Kaspersky), Trojan.Win32.Generic!BT (VIPRE), Trojan-Dropper.Small!IK (Emsisoft), Backdoor.Win32.Fynloski.FD, Trojan.Win32.Iconomon.FD, Trojan.Win32.Sasfis.FD, VirTool.Win32.DelfInject.FD, BackdoorFynloski.YR, GenericDownloader.YR, GenericInjector.YR, TrojanDownloaderAndromeda.YR (Lavasoft MAS)Behaviour: Trojan-Dropper, Trojan-Downloader, Trojan, Backdoor, VirTool
The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.
Summary
MD5: 1bca6e7ee645068e7ae76cb7b654ec0b
SHA1: b80b069aad4415982e1a06729f8dead85f5f07e6
SHA256: 33ff8416e6130c0751273052424e0196fa38da345992276624a30fb69bdd77fa
SSDeep: 12288:lrCebgnGrSC2ygj/KVuzkIONklcFFUN7K2s1h0bWP8SW3ACIJkd6GjW5ON:lrLFuPjdkfNrFUTQ0be8p6B5O
Size: 704512 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: MicrosoftVisualC, NETexecutable, UPolyXv05_v6
Company: WinterSoft
Created at: 2013-11-07 14:08:25
Summary: Backdoor. Malware that enables a remote control of victim's machine.
Dynamic Analysis
Payload
No specific payload has been found.
Process activity
The Backdoor creates the following process(es):
%original file name%.exe:844
%original file name%.exe:500
ctfmon.exe:1224
klaus.exe:216
The Backdoor injects its code into the following process(es):
klaus.exe:384
File activity
The process %original file name%.exe:844 makes changes in the file system.
The Backdoor creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Ãœþø ôþúуüõýты\DCSCMIN\klaus.exe (704512 bytes)
The process %original file name%.exe:500 makes changes in the file system.
The Backdoor creates and/or writes to the following file(s):
%System%\drivers\etc\hosts (896 bytes)
The process klaus.exe:216 makes changes in the file system.
The Backdoor creates and/or writes to the following file(s):
%System%\drivers\etc\hosts (896 bytes)
Registry activity
The process %original file name%.exe:844 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "BC 65 06 27 77 F7 9A EF 86 F6 22 56 CE 98 1D 66"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cookies" = "%Documents and Settings%\%current user%\Cookies"
[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Documents and Settings%\%current user%\Ãœþø ôþúуüõýты\DCSCMIN]
"klaus.exe" = ""
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{91167d45-103d-11db-8c91-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{d8c0d8da-77bd-11e0-bb02-000c293bc0fd}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{91167d42-103d-11db-8c91-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Personal" = "%Documents and Settings%\%current user%\Ãœþø ôþúуüõýты"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{ebcf8d94-66db-11de-b228-806d6172696f}]
"BaseClass" = "Drive"
The Backdoor adds the reference to itself to be executed when a user logs on:
[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
"UserInit" = "%System%\userinit.exe,%Documents and Settings%\%current user%\Ãœþø ôþúуüõýты\DCSCMIN\klaus.exe"
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]
"DarkComet RAT" = "%Documents and Settings%\%current user%\Ãœþø ôþúуüõýты\DCSCMIN\klaus.exe"
The Backdoor 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 Backdoor 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:
"UNCAsIntranet" = "1"
The Backdoor modifies IE settings for security zones to map all web-nodes that bypassing the proxy to the Intranet Zone:
"ProxyBypass" = "1"
The process %original file name%.exe:500 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "88 57 2A 89 95 06 76 76 4E B3 B5 9A A9 2A 63 16"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"
The process ctfmon.exe:1224 makes changes in the system registry.
The Backdoor deletes the following value(s) in system registry:
The Backdoor disables automatic startup of the application by deleting the following autorun value:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"internat.exe"
The process klaus.exe:216 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "10 7D A3 7F 04 73 2D 44 79 0A 4E D2 37 AE 85 41"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"
The process klaus.exe:384 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "91 C9 71 4F 30 EF 66 55 08 A9 0D 41 E4 43 8E B9"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{ebcf8d94-66db-11de-b228-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{d8c0d8da-77bd-11e0-bb02-000c293bc0fd}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{91167d42-103d-11db-8c91-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{91167d45-103d-11db-8c91-806d6172696f}]
"BaseClass" = "Drive"
Network activity (URLs)
No activity has been detected.
HOSTS file anomalies
The Backdoor modifies "%System%\drivers\etc\hosts" file which is used to translate DNS entries to IP addresses. The modified file is 896 bytes in size. The following strings are added to the hosts file listed below:
| 127.0.0.1 | www.virustotal.com |
| 127.0.0.1 | www.mcafee.com |
| 127.0.0.1 | www.avira.com |
| 127.0.0.1 | www.avast.com |
| 127.0.0.1 | www.symantec.com |
| 127.0.0.1 | www.clamwin.com |
| 127.0.0.1 | www.kaspersky.com |
| 127.0.0.1 | www.comodo.com |
| 127.0.0.1 | www.norton.com |
| 127.0.0.1 | www.avg.com |
| 127.0.0.1 | www.novirusthanks.org |
| 127.0.0.1 | virusscan.jotti.org |
| 127.0.0.1 | www.viruschief.com |
| 127.0.0.1 | www.fortiguard.com |
| 127.0.0.1 | www.bitdefender.com |
| 127.0.0.1 | www.f-secure.com |
| 127.0.0.1 | www.virustotal.com |
| 127.0.0.1 | www.mcafee.com |
| 127.0.0.1 | www.avira.com |
| 127.0.0.1 | www.avast.com |
| 127.0.0.1 | www.symantec.com |
| 127.0.0.1 | www.clamwin.com |
| 127.0.0.1 | www.kaspersky.com |
| 127.0.0.1 | www.comodo.com |
| 127.0.0.1 | www.norton.com |
| 127.0.0.1 | www.avg.com |
| 127.0.0.1 | www.novirusthanks.org |
| 127.0.0.1 | virusscan.jotti.org |
| 127.0.0.1 | www.viruschief.com |
| 127.0.0.1 | www.fortiguard.com |
| 127.0.0.1 | www.bitdefender.com |
| 127.0.0.1 | www.f-secure.com |
Rootkit activity
No anomalies have been detected.
Propagation
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):
%original file name%.exe:844
%original file name%.exe:500
klaus.exe:216 - Delete the original Backdoor file.
- Delete or disinfect the following files created/modified by the Backdoor:
%Documents and Settings%\%current user%\Ãœþø ôþúуüõýты\DCSCMIN\klaus.exe (704512 bytes)
%System%\drivers\etc\hosts (896 bytes) - Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"DarkComet RAT" = "%Documents and Settings%\%current user%\Ãœþø ôþúуüõýты\DCSCMIN\klaus.exe" - Remove the references to the Backdoor by modifying the following registry value(s) (How to Work with System Registry):
[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
"UserInit" = "%System%\userinit.exe,%Documents and Settings%\%current user%\Ãœþø ôþúуüõýты\DCSCMIN\klaus.exe" - Restore the original content of the HOSTS file (%System%\drivers\etc\hosts): 127.0.0.1 localhost
- Reboot the computer.