Trojan.Win32.RBot.fb (Kaspersky), Trojan.Win32.Generic!BT (VIPRE), mzpefinder_pcap_file.YR, GenericIRCBot.YR, GenericMSNWorm.YR, Rbot.YR, GenericAutorunWorm.YR, BackdoorIRC.YR, Blazebot.YR, GenericProxy.YR (Lavasoft MAS)Behaviour: Trojan, Backdoor, Worm, WormAutorun, IRCBot, MSNWorm, Trojan-Proxy
The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.
Summary
MD5: 388f8fb2baad992729cf06fb302ee4d3
SHA1: 95c37fd950e703b91e7548f0ce7e0b05d87e10e4
SHA256: f449e6042dea640ffc30b314b4a5626b1ed7de3df95e5dff36eff327d50e185c
SSDeep: 12288:YhkDgouVA2nxKkorvdRgQriDwOIxmxiZnYQE7PJcE4azyOEHrXxpUWw1MXpMPx:ARmJkcoQricOIQxiZY1iaOVrXxpUKXps
Size: 1077738 bytes
File type: EXE
Platform: WIN32
Entropy: Not Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2012-01-29 23:32:28
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. |
IRCBot | A bot can communicate with command and control servers via IRC channel. |
MSNWorm | A worm can spread its copies through the MSN Messanger. |
Trojan-Proxy | This program can launch a proxy server (SOCKS4) on a designated TCP port. |
Process activity
The Trojan creates the following process(es):
nircmd.exe:1304
nircmd.exe:1100
attrib.exe:404
nfrkjlu.exe:1352
cmds.exe:1272
system.exe:1284
%original file name%.exe:1588
%original file name%.exe:1376
cys.exe:1456
reg.exe:1088
The Trojan injects its code into the following process(es):
nfrkjlu.exe:468
cys.exe:1120
File activity
The process nfrkjlu.exe:1352 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temp\res.ico2 (601 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\res.ico (601 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\aut2.tmp (1249 bytes)
The Trojan deletes the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temp\res.ico2 (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\aut2.tmp (0 bytes)
The process nfrkjlu.exe:468 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\OPQNSD2J\critical[1].exe (483704 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\OPQNSD2J\1711841268.ms[1] (672024 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@dropbox[1].txt (543 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@www.dropbox[2].txt (372 bytes)
%WinDir%\cmds.exe (484338 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@directxex[1].txt (225 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@dropbox[2].txt (250 bytes)
%Documents and Settings%\%current user%\Cookies\index.dat (5784 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@www.dropbox[1].txt (134 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\OPQNSD2J\desktop.ini (67 bytes)
C:\cys.exe (672628 bytes)
The Trojan deletes the following file(s):
%Documents and Settings%\%current user%\Cookies\Current_User@dropbox[2].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@dropbox[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@www.dropbox[1].txt (0 bytes)
The process cmds.exe:1272 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):
%WinDir%\syso\critical\libcurl-4.dll (1345 bytes)
%WinDir%\syso\critical\zlib1.dll (601 bytes)
%WinDir%\syso\critical\pthreadGC2.dll (2017 bytes)
%WinDir%\syso\critical\antivirus.bat (129 bytes)
%WinDir%\syso\critical\sys.bat (337 bytes)
%WinDir%\syso\critical\system.exe (1289 bytes)
%WinDir%\syso\critical\nircmd.exe (43 bytes)
The Trojan deletes the following file(s):
%WinDir%\syso\critical\__tmp_rar_sfx_access_check_1275593 (0 bytes)
The process %original file name%.exe:1588 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%System%\nfrkjlu.exe (7433 bytes)
The process %original file name%.exe:1376 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temp\res.ico2 (601 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\aut1.tmp (1249 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\res.ico (601 bytes)
The Trojan deletes the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temp\aut1.tmp (0 bytes)
The process cys.exe:1120 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):
%WinDir%\csrss.exe (4545 bytes)
The process cys.exe:1456 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temp\res.ico2 (601 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\res.ico (601 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\aut3.tmp (1137 bytes)
The Trojan deletes the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temp\res.ico2 (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\aut3.tmp (0 bytes)
Registry activity
The process nircmd.exe:1304 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "58 91 17 C9 A6 90 7A 80 EB 36 32 F6 A0 2E 8C 8D"
The process nircmd.exe:1100 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "4C 9C 4A FA 30 3C 74 C1 36 4A 44 FF E9 D0 99 31"
The process attrib.exe:404 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "DC 1E B5 7E 0D 82 0B 67 C6 C5 45 BE D7 2A E6 BA"
The process nfrkjlu.exe:1352 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "7C 9F 6D F4 E2 F8 C5 D8 67 3E 7B D6 C3 8F EF AD"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
[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\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
The process nfrkjlu.exe:468 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Directory" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5"
[HKCU\Software\Microsoft\yOLE]
"Supports RAS Connections" = "nfrkjlu.exe"
[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"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections]
"SavedLegacySettings" = "3C 00 00 00 16 00 00 00 01 00 00 00 00 00 00 00"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
[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\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\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\SYSTEM\CurrentControlSet\Control\Lsa]
"Supports RAS Connections" = "nfrkjlu.exe"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"
[HKLM\SOFTWARE\Microsoft\yOLE]
"Supports RAS Connections" = "nfrkjlu.exe"
[HKLM\System\CurrentControlSet\Control\Lsa]
"Supports RAS Connections" = "nfrkjlu.exe"
[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"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CacheLimit" = "65452"
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "F5 C0 40 3B 9B 32 48 49 82 4E A7 F4 7D 8B B8 43"
[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\C:]
"cys.exe" = "cys"
[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\C:\windows]
"cmds.exe" = "cmds"
[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"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{b98117e8-75ca-11e2-81b2-000c293708fb}]
"BaseClass" = "Drive"
[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"
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\RunServices]
"Supports RAS Connections" = "nfrkjlu.exe"
The Trojan modifies IE settings for security zones to map all web-nodes that bypassing proxy to the Intranet Zone:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"ProxyBypass" = "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]
"Supports RAS Connections" = "nfrkjlu.exe"
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"
To automatically run itself each time Windows is booted, the Trojan adds the following link to its file to the system registry autorun key:
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"Supports RAS Connections" = "nfrkjlu.exe"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices]
"Supports RAS Connections" = "nfrkjlu.exe"
Proxy settings are disabled:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"
The Trojan deletes the following value(s) in system registry:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"AutoConfigURL"
"ProxyServer"
"ProxyOverride"
The process cmds.exe:1272 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "C0 86 D7 DB E8 F2 3F 08 5C 63 4F BC 52 F3 77 E6"
[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\ShellNoRoam\MUICache\C:\Windows\syso\critical]
"sys.bat" = "sys"
[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]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"
[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]
"Personal" = "%Documents and Settings%\%current user%\My Documents"
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 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 Trojan modifies IE settings for security zones to map all web-nodes that bypassing proxy to the Intranet Zone:
"ProxyBypass" = "1"
The process system.exe:1284 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "E8 5D 52 4D A9 87 7F C4 87 A0 FA A6 BF D5 BA 72"
The process %original file name%.exe:1588 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 66 68 A7 62 CA 18 0D 3A C5 4B 74 69 90 E9 BC"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"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\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"
[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\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]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CacheLimit" = "65452"
The process %original file name%.exe:1376 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "39 F7 B2 B6 B4 94 E1 A7 0E DE 3F BC 5B 75 DA 40"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
[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\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
The process cys.exe:1120 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "68 1F 26 08 66 D5 9B 6A 24 9D B9 0A B6 EC C2 C6"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"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\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"
[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\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]
"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 Trojan adds the following link to its file to the system registry autorun key:
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"Remote Registry Service" = "csrss.exe"
The process cys.exe:1456 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "FD 40 0B 45 F1 09 A8 2F 8E 3F 63 CF 3E 14 F0 66"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
[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\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
The process reg.exe:1088 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "02 C0 53 98 1D 2C 1C 2F 8F FA 30 D0 F3 DD 11 83"
To automatically run itself each time Windows is booted, the Trojan adds the following link to its file to the system registry autorun key:
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"Windows Update" = "C:\Windows\syso\critical\antivirus.bat"
Network activity (URLs)
URL | IP |
---|---|
hxxp://directxex.com/uploads/1711841268.ms.exe?dl=1 | 108.162.199.96 |
hxxp://www.v.dropbox.com/s/6hmm09s9gg54wep/critical.exe?dl=1 | |
www.dropbox.com | 108.160.165.139 |
dl.dropboxusercontent.com | 50.16.206.191 |
videos.p0rn-lover.us | 176.31.75.42 |
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.A worm can spread its copies through the MSN Messanger.
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):
nircmd.exe:1304
nircmd.exe:1100
attrib.exe:404
nfrkjlu.exe:1352
cmds.exe:1272
system.exe:1284
%original file name%.exe:1588
%original file name%.exe:1376
cys.exe:1456
reg.exe:1088 - Delete the original Trojan file.
- Delete or disinfect the following files created/modified by the Trojan:
%Documents and Settings%\%current user%\Local Settings\Temp\res.ico2 (601 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\aut2.tmp (1249 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\OPQNSD2J\critical[1].exe (483704 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\OPQNSD2J\1711841268.ms[1] (672024 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@dropbox[1].txt (543 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@www.dropbox[2].txt (372 bytes)
%WinDir%\cmds.exe (484338 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@directxex[1].txt (225 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@dropbox[2].txt (250 bytes)
%Documents and Settings%\%current user%\Cookies\index.dat (5784 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@www.dropbox[1].txt (134 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\OPQNSD2J\desktop.ini (67 bytes)
C:\cys.exe (672628 bytes)
%WinDir%\syso\critical\libcurl-4.dll (1345 bytes)
%WinDir%\syso\critical\zlib1.dll (601 bytes)
%WinDir%\syso\critical\pthreadGC2.dll (2017 bytes)
%WinDir%\syso\critical\antivirus.bat (129 bytes)
%WinDir%\syso\critical\sys.bat (337 bytes)
%WinDir%\syso\critical\system.exe (1289 bytes)
%WinDir%\syso\critical\nircmd.exe (43 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%System%\nfrkjlu.exe (7433 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\aut1.tmp (1249 bytes)
%WinDir%\csrss.exe (4545 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\aut3.tmp (1137 bytes) - Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKCU\Software\Microsoft\Windows\CurrentVersion\RunServices]
"Supports RAS Connections" = "nfrkjlu.exe"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"Supports RAS Connections" = "nfrkjlu.exe"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"Supports RAS Connections" = "nfrkjlu.exe"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices]
"Supports RAS Connections" = "nfrkjlu.exe"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"Remote Registry Service" = "csrss.exe"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"Windows Update" = "C:\Windows\syso\critical\antivirus.bat" - 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.