Trojan.Win32.FlyStudio_e2fa75c0ce

by malwarelabrobot on February 9th, 2014 in Malware Descriptions.

Trojan.Pck.Pepatch.DD (BitDefender), TrojanDropper:Win32/Hupigon.L (Microsoft), Trojan-Dropper.Win32.Delf.xl (Kaspersky), Trojan.MulDrop.20284 (DrWeb), Trojan.Pck.Pepatch.DD (B) (Emsisoft), Artemis!E2FA75C0CEAE (McAfee), Trojan.MulDrop (Ikarus), Trojan.Pck.Pepatch.DD (FSecure), Dropper.Generic.FVB (AVG), Win32:Agent-CKD [Trj] (Avast), Trojan.Win32.FlyStudio.FD, mzpefinder_pcap_file.YR, GenericEmailWorm.YR, GenericPhysicalDrive0.YR (Lavasoft MAS)
Behaviour: Trojan-Dropper, Trojan, Worm, EmailWorm


The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.

Summary
Technical Details
Removal Recommendations

MD5: e2fa75c0ceaef915bd3dec9a865f144d
SHA1: 59018a964c33597ddebd06c542bd5e46c6dec63b
SHA256: b20f8b9f110a2d4db49ff6a9fc3606a72b418720681c7370384a1f3fa78a5c00
SSDeep: 12288:/we7joN1K2O/tWPGQh8JAUYOP54ozeo4K6p:oSnto694ZTp
Size: 472576 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6
Company: no certificate found
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).

Payload

Behaviour Description
EmailWorm Worm can send e-mails.


Process activity

The Trojan creates the following process(es):

QQ.exe:1104
QQ.exe:528
net.exe:560
net.exe:396
net1.exe:308
net1.exe:1604
%original file name%.exe:1684
update.exe:1376
CCG0.exe:1720

The Trojan injects its code into the following process(es):

CCG1.exe:1476
gh0st.exe:1516
server.exe:1448

File activity

The process CCG1.exe:1476 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)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\OHMJ4HI3\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\OLARGD2R\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\6TBD2D2W\desktop.ini (67 bytes)
%WinDir%\95AE26D4\svchsot.exe (601 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\6TBD2D2W\gh0st[1].exe (140073 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\W5QFK5AR\desktop.ini (67 bytes)

The process gh0st.exe:1516 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

C:\server.exe (12076 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\OHMJ4HI3\1[1].js (4501 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\W5QFK5AR\1[1].css (1865 bytes)
%WinDir%\update1.exe (768 bytes)
%WinDir%\update.exe (1905 bytes)
%WinDir%\fakedisk.sys (103 bytes)
%WinDir%\setup.exe (229 bytes)
%System%\iiexplorer.exe (1425 bytes)

The process server.exe:1448 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%WinDir%\CF88D2AB\svchsot.exe (601 bytes)

The process %original file name%.exe:1684 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\upwind1.exe (87 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\CCG1.exe (20580 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\CCG0.exe (160276 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\upwind0.exe (1620 bytes)

The Trojan deletes the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\upwind1.exe (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\upwind0.exe (0 bytes)

The process update.exe:1376 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%System%\QQ.exe (10 bytes)

Registry activity

The process CCG1.exe:1476 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"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections]
"SavedLegacySettings" = "3C 00 00 00 13 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\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"

[HKLM\SYSTEM\InfoTime]
"InfoTime" = "20140208"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CacheLimit" = "65452"

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "12 AF 19 0E BA 2C 83 E1 2A 0B 1C CF A4 A7 B0 D0"

[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\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[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"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"History" = "%Documents and Settings%\%current user%\Local Settings\History"

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:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"95AE26D4" = "%WinDir%\95AE26D4\svchsot.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"

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 gh0st.exe:1516 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"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections]
"SavedLegacySettings" = "3C 00 00 00 14 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"

[HKLM\System\CurrentControlSet\Hardware Profiles\0001\Software\Microsoft\windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Personal" = "%Documents and Settings%\%current user%\My Documents"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\C:\windows]
"update1.exe" = "update1"

[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"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CacheLimit" = "65452"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Desktop" = "%Documents and Settings%\All Users\Desktop"

[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 Documents" = "%Documents and Settings%\All Users\Documents"

[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" = "1B 0C 88 8C 30 C4 1F 72 8C 28 E0 DE C3 CF DD 2B"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache1"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Desktop" = "%Documents and Settings%\%current user%\Desktop"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"MigrateProxy" = "1"

[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"

[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\ShellNoRoam\MUICache\c:]
"server.exe" = "server"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"History" = "%Documents and Settings%\%current user%\Local Settings\History"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\C:\windows]
"update.exe" = "update"

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]
"Virus" = "%System%\iiexplorer.exe"

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 QQ.exe:1104 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "A6 CF 0E 12 64 2E 38 72 A5 D1 44 6E 0F 8C 4B C3"

[HKLM\System\CurrentControlSet\Services\yoyoddos ]
"Description" = "ÓÄÓÄ ×¨Òµ·À»ðǽѹÁ¦²âÊÔϵͳ ·þÎñÏî"

The process QQ.exe:528 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "1E DD 18 95 C2 51 6A C4 8A 9B 48 8C 22 54 76 FD"

The process server.exe:1448 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "C2 81 44 71 0F F6 55 48 98 C2 2E F7 98 7E B5 CB"

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]
"CF88D2AB" = "%WinDir%\CF88D2AB\svchsot.exe"

The process net.exe:560 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "73 A2 F2 A8 DE 28 E9 24 9E 84 EB 5F 90 F4 08 3B"

The process net.exe:396 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "50 FB EE AA 75 6B 09 EA E8 87 D5 AA E9 99 71 23"

The process net1.exe:308 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "78 AC E4 E4 1C C5 7D 40 AA 2F 87 C7 11 FA 31 15"

The process net1.exe:1604 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "07 CA D8 24 18 85 EC D9 95 12 43 8B 26 72 21 2D"

The process CCG0.exe:1720 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "73 17 2C 56 EE E0 2A C4 90 F4 25 BF B8 D6 BA F1"

Network activity (URLs)

URL IP
hxxp://chflower.com/vip/gh0st.exe (ET POLICY PE EXE or DLL Windows file download , Malicious) 58.64.142.75
hxxp://www.3ghacker.com/1.js (ET POLICY PE EXE or DLL Windows file download , Malicious) 173.208.252.155
hxxp://www.3ghacker.com/1.css (ET TROJAN Possible Windows executable sent when remote host claims to send HTML/CSS Content , Malicious)
wangxiaoting520.f3322.org 117.60.242.249
xzq8099.f3322.org 106.110.149.58


HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Propagation


Remove it with Ad-Aware

  1. Click (here) to download and install Ad-Aware Free Antivirus.
  2. Update the definition files.
  3. Run a full scan of your computer.


Manual removal*

  1. Terminate malicious process(es) (How to End a Process With the Task Manager):

    QQ.exe:1104
    QQ.exe:528
    net.exe:560
    net.exe:396
    net1.exe:308
    net1.exe:1604
    %original file name%.exe:1684
    update.exe:1376
    CCG0.exe:1720

  2. Delete the original Trojan file.
  3. Delete or disinfect the following files created/modified by the Trojan:

    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\OHMJ4HI3\desktop.ini (67 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\OLARGD2R\desktop.ini (67 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\6TBD2D2W\desktop.ini (67 bytes)
    %WinDir%\95AE26D4\svchsot.exe (601 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\6TBD2D2W\gh0st[1].exe (140073 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\W5QFK5AR\desktop.ini (67 bytes)
    C:\server.exe (12076 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\OHMJ4HI3\1[1].js (4501 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\W5QFK5AR\1[1].css (1865 bytes)
    %WinDir%\update1.exe (768 bytes)
    %WinDir%\update.exe (1905 bytes)
    %WinDir%\fakedisk.sys (103 bytes)
    %WinDir%\setup.exe (229 bytes)
    %System%\iiexplorer.exe (1425 bytes)
    %WinDir%\CF88D2AB\svchsot.exe (601 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\upwind1.exe (87 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\CCG1.exe (20580 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\CCG0.exe (160276 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\upwind0.exe (1620 bytes)
    %System%\QQ.exe (10 bytes)

  4. Delete the following value(s) in the autorun key (How to Work with System Registry):

    [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
    "95AE26D4" = "%WinDir%\95AE26D4\svchsot.exe"

    [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
    "Virus" = "%System%\iiexplorer.exe"

    [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
    "CF88D2AB" = "%WinDir%\CF88D2AB\svchsot.exe"

  5. Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
  6. Reboot the computer.

*Manual removal may cause unexpected system behaviour and should be performed at your own risk.

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