Trojan.MSIL.Agent.BRS_cdec5bda17

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

KNKM4Z122F.exe:2836
%original file name%.exe:1072

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

KNKM4Z122F.exe:4024

Mutexes

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

File activity

The process %original file name%.exe:1072 makes changes in the file system.

The Trojan creates and/or writes to the following file(s):

C:\Users\"%CurrentUserName%"\AppData\Local\Temp\KNKM4Z122F.exe (25659 bytes)

Registry activity

The process KNKM4Z122F.exe:2836 makes changes in the system registry.

The Trojan creates and/or sets the following values in system registry:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"AutoDetect" = "1"
"UNCAsIntranet" = "0"

The Trojan deletes the following value(s) in system registry:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"ProxyBypass"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"ProxyBypass"
"IntranetName"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"IntranetName"

The process KNKM4Z122F.exe:4024 makes changes in the system registry.

The Trojan creates and/or sets the following values in system registry:

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\RunOnce]
"OMEWPRODUCT_WBNB9" = "C:\Users\"%CurrentUserName%"\AppData\Local\Temp\KNKM4Z122F.exe"

The process %original file name%.exe:1072 makes changes in the system registry.

The Trojan creates and/or sets the following values in system registry:

[HKCU\Software\Microsoft\wewewe]
"partner" = "idsc"

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

[HKLM\SOFTWARE\Microsoft\Tracing\cdec5bda17b9b80ba29c74a86545345b_RASMANCS]
"ConsoleTracingMask" = "4294901760"
"EnableConsoleTracing" = "0"

[HKLM\SOFTWARE\Microsoft\Tracing\cdec5bda17b9b80ba29c74a86545345b_RASAPI32]
"EnableConsoleTracing" = "0"

[HKCU\Software\Microsoft\wewewe]
"Product" = "unknown"

[HKLM\SOFTWARE\Microsoft\Tracing\cdec5bda17b9b80ba29c74a86545345b_RASAPI32]
"ConsoleTracingMask" = "4294901760"
"FileDirectory" = "%windir%\tracing"

[HKCU\Software\Microsoft\wewewe]
"channel" = "1"

[HKLM\SOFTWARE\Microsoft\Tracing\cdec5bda17b9b80ba29c74a86545345b_RASAPI32]
"EnableFileTracing" = "0"
"FileTracingMask" = "4294901760"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"UNCAsIntranet" = "0"

[HKLM\SOFTWARE\Microsoft\Tracing\cdec5bda17b9b80ba29c74a86545345b_RASMANCS]
"FileDirectory" = "%windir%\tracing"
"MaxFileSize" = "1048576"
"FileTracingMask" = "4294901760"

[HKLM\SOFTWARE\Microsoft\Tracing\cdec5bda17b9b80ba29c74a86545345b_RASAPI32]
"MaxFileSize" = "1048576"

[HKLM\SOFTWARE\Microsoft\Tracing\cdec5bda17b9b80ba29c74a86545345b_RASMANCS]
"EnableFileTracing" = "0"

The Trojan deletes the following value(s) in system registry:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"ProxyBypass"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"ProxyBypass"
"IntranetName"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"IntranetName"

Dropped PE files

MD5	File path
7d0668ef85f8f57bd8342a9d927e2102	c:\Users\"%CurrentUserName%"\AppData\Local\Temp\KNKM4Z122F.exe

HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Propagation

Removals

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):

   KNKM4Z122F.exe:2836
   %original file name%.exe:1072

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

   C:\Users\"%CurrentUserName%"\AppData\Local\Temp\KNKM4Z122F.exe (25659 bytes)

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

   [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce]
   "OMEWPRODUCT_WBNB9" = "C:\Users\"%CurrentUserName%"\AppData\Local\Temp\KNKM4Z122F.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.

Static Analysis

VersionInfo

Company Name: SFW4E%JQ
Product Name: S
Product Version: 8.7.3.3
Legal Copyright: Copyright (c) 2016
Legal Trademarks:
Original Filename: TikTak.exe
Internal Name: TikTak.exe
File Version: 8.7.3.3
File Description: SFW4E
Comments: S
Language: English (United States)

Company Name: SFW4E%JQProduct Name: SProduct Version: 8.7.3.3Legal Copyright: Copyright (c) 2016Legal Trademarks: Original Filename: TikTak.exeInternal Name: TikTak.exeFile Version: 8.7.3.3File Description: SFW4EComments: SLanguage: English (United States)

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	8192	2926092	2926592	4.16582	2322aa8ae00d541b408cd64a6c412726
.rsrc	2940928	72244	72704	3.40925	f01aaf595074d5ef86d3558d1ca2695f
.reloc	3014656	12	512	0.070639	b56fafb086871b9e627924c1592afa53

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Network Activity

URLs

URL	IP
hxxp://weminternal.com/get/4/remote.exe	46.105.121.115

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

GET /get/4/remote.exe HTTP/1.1

Host: weminternal.com

Connection: Keep-Alive

HTTP/1.1 200 OK

Date: Tue, 22 Nov 2016 13:14:34 GMT

Server: Apache/2.4.10 (Debian)

Cache-Control: no-cache

content-disposition: attachment; filename="remote.exe"

Keep-Alive: timeout=10, max=100

Connection: Keep-Alive

Transfer-Encoding: chunked

Content-Type: application/x-msdownload

55c00..MZ......................@...............................................!..L.!This program cannot be run in DOS mode....$.......PE..L...Z 4X.........."...0..B..........B`... ........@.. ....................................@.................................._..O....................................^............................................... ............... ..H............text...H@... ...B.................. ..`.rsrc................D..............@..@.reloc...............Z..............@..B................$`......H.......,"...............3... ............................................(....*..(....*.~....-.r...p.....(....o....s.........~....*.~....*.......*.~....*..(....*Vs....(....t.........*.0..M.......(.....o......s....%o......o....o ......&...%..|.o!................(....("...*..-.r=..ps#...z.($...o%...%-.rk..ps#...z.......%...o&...&*..0...........(".....('....o(...s).... o*....s ...%.o,...%.o-....('....o(...o......s/.......s0.....i.4.....%......io1......o....o....(2........o3...r...p(4...o5...*..0..........r...p(.......(......&..*................BSJB............v2.0.50727......l...D...#~..........#Strings............#US.........#GUID.......D...#Blob...........WU.........3........4...................5.............................................\...............3.......P.............................................6.......c.....c...Q.......(...n.(.........W. ...T. ...........P...g.............q...?...........!.\.........:............. ..... ..... .........,.\................. ..... ..... ............

<<< skipped >>>

Map

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

Strings from Dumps

KNKM4Z122F.exe_4024_rwx_69722000_00002000:

.ri3J

.ri3J

-yiq.yiw

-yiq.yiw

-yiq.yi

-yiq.yi