Trojan.Delf.Inject.AK_96704b621f

by malwarelabrobot on August 10th, 2014 in Malware Descriptions.

HEUR:Worm.Win32.Generic (Kaspersky), Trojan.Delf.Inject.AK (B) (Emsisoft), Trojan.Delf.Inject.AK (AdAware), GenericMSNWorm.YR, GenericAutorunWorm.YR, GenericIRCBot.YR (Lavasoft MAS)
Behaviour: Trojan, Worm, WormAutorun, IRCBot, MSNWorm


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

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Summary
Dynamic Analysis
Static Analysis
Network Activity
Map
Strings from Dumps
Removals

MD5: 96704b621f81164b2ca1e26057d427b1
SHA1: 1c82f7a17d24228908acd575ad682a11f455427b
SHA256: 64cba2aeb989e16ebca03f13568754e1e7df705d96a1954d52e0b9daaa84de65
SSDeep: 1536: odIqeV7/DwTaZ4GEt2hR8x7AwJ8x7AwS:oqeVPwTaZqmix7x6x7xS
Size: 55296 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: BorlandDelphi30, UPolyXv05_v6
Company: no certificate found
Created at: no data
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
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.


Process activity

The Trojan creates the following process(es):

%original file name%.exe:636
svhost.exe:1524

The Trojan injects its code into the following process(es):
No processes have been created.

Mutexes

The following mutexes were created/opened:
No objects were found.

File activity

The process %original file name%.exe:636 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\3ETRQ6AX\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\UAMN61ZC\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\ISIUYYK3\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\QPYBHCLC\desktop.ini (67 bytes)
%WinDir%\svhost.exe (55 bytes)

Registry activity

The process %original file name%.exe:636 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "EB F7 FC 1B 4A 04 5D 4B 64 4D 19 FA 1C 80 39 B0"

[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]
"Windows Messanger Control Center" = "svhost.exe"

The process svhost.exe:1524 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "0F 52 9D B7 27 81 E7 9C C8 FD D6 EB 6D EE 90 FA"

[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"

Dropped PE files

There are no dropped PE files.

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.

VersionInfo

No information is available.

PE Sections

Name Virtual Address Virtual Size Raw Size Entropy Section MD5
CODE 4096 18280 18432 4.46099 fde03d7ebcbda002ca6538bec2c59cda
DATA 24576 280 512 1.96418 487bd4c3e1408b573ecc7c630f0a9405
BSS 28672 1785 0 0 d41d8cd98f00b204e9800998ecf8427e
.idata 32768 1158 1536 2.50712 0d295d29ad0c514539397dea5c1c3d7c
.edata 36864 70 512 0.426673 cb286ec0666b81e0e8059da933292ac2
.tls 40960 8 0 0 d41d8cd98f00b204e9800998ecf8427e
.rdata 45056 24 512 0.14174 44d7eea98589ca89f9a1dc09e347e00f
.reloc 49152 1236 1536 4.07757 feba9bee55af72035b5cb6c99508d010
.rsrc 53248 143360 19968 5.53008 8daace41e62de910125112e4a9e512e7

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Total found: 1
bbe4dc1b3c89e679000a6eb4bef8293c

URLs

No activity has been detected.

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

Web Traffic was not found.

The Trojan connects to the servers at the folowing location(s):

svhost.exe_1524:

.text
`.rdata
@.data
t1SSSSh
SSShl
r.getfile
r.new
r.update
r.upd4te
login
msn.msg
msn.stop
aim.msg
aim.stop
triton.msg
triton.stop
GetWindowsDirectoryA
KERNEL32.dll
VkKeyScanA
keybd_event
USER32.dll
MSVCRT.dll
_acmdln
RegCloseKey
RegCreateKeyExA
ADVAPI32.dll
ole32.dll
OLEAUT32.dll
%s Welcome.
%s Fail.
%s Spy: %s!%s@%s (PM: "%s")
%s Fail by: %s!%s@%s (Pass Tried: %s)
%s %s out.
%s <%i> out.
%s No user at: <%i>
%s Invalid slot: <%i>
%s Kill: <%d> threads
%s No threads
%s Killed thread: <%s>
%s Failed kt: <%s>
%s %s already running: <%d>.
%s Fail start %s, err: <%d>.
%s Status: %s. Box Uptime: %s, Bot Uptime: %s, Connected for: %s.
%s Bot installed on: %s.
Go fuck yourself %s.
MSN// Message & Zipfile sent to: %d contacts.
MSN// Message sent to: %d Contacts.
MSN// Sent Stats - Messages: %d :: Files: %d :: Message & Files: %d.
Infected USB Drive %s
%s logged in.
Removed by: %s!%s@%s
%s Advapi.dll Failed
%s PStore.dll Failed.
%s Naim thd.
%s RuC.
%s mis param.
%s Failed to parse command.
%s Downloading URL: %s to: %s.
%s Downloading update from: %s to: %s.
%seraseme_%d%d%d%d%d.exe
%s Thread Disabled.
%s Thread Activated: Sending Message.
%s Bad URL or DNS Error, error: <%d>
%s Update failed: Error executing file: %s.
%s Process Finished: "%s", Total Running Time: %s.
%s Created process: "%s", PID: <%d>
%s Failed to create process: "%s", error: <%d>
%s Couldn't parse path, error: <%d>
%s File download: %.1fKB to: %s @ %.1fKB/sec.
%s Couldn't open file for writing: %s.
Ping Timeout? (%d-%d)%d/%d
USER %s * 0 :%s
NICK %s
PASS %s
QUIT %s
PONG %s
NICK
PRIVMSG
JOIN
PRIVMSG %s :%s
JOIN %s
JOIN %s %s
MODE %s %s %s
MODE %s %s
__oxFrame.class__
shlwapi.dll
psapi.dll
SQLDisconnect
SQLFreeHandle
SQLAllocHandle
SQLExecDirect
SQLSetEnvAttr
SQLDriverConnect
odbc32.dll
ShellExecuteA
shell32.dll
mpr.dll
GetUdpTable
GetTcpTable
iphlpapi.dll
dnsapi.dll
netapi32.dll
Mozilla/4.0 (compatible)
InternetCrackUrlA
InternetOpenUrlA
FtpPutFileA
FtpGetFileA
HttpSendRequestA
HttpOpenRequestA
wininet.dll
ws2_32.dll
RegEnumKeyExA
advapi32.dll
user32.dll
kernel32.dll
%s!%s@%s
svhost.exe
[email protected]
Windows Messanger Control Center
love.mydyn.net
SOFTWARE\Microsoft\Windows\CurrentVersion\Run\
%s\%s
%s No %s thread found.
%s %s thread stopped. (%d thread(s) stopped.)
\autorun.inf
icon=%SystemRoot%\system32\SHELL32.dll,4
autorunme.exe
[.ShellClassInfo]
CLSID={645FF040-5081-101B-9F08-00AA002F954E}
\Desktop.ini
del "%s">nul
if exist "%s" goto Repeat
ping 0.0.0.0>nul
%s\removeMe%i%i%i%i.bat
192.168.1.125


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):

    %original file name%.exe:636
    svhost.exe:1524

  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\3ETRQ6AX\desktop.ini (67 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\UAMN61ZC\desktop.ini (67 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\ISIUYYK3\desktop.ini (67 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\QPYBHCLC\desktop.ini (67 bytes)
    %WinDir%\svhost.exe (55 bytes)

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

    [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
    "Windows Messanger Control Center" = "svhost.exe"

  5. Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.

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

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