RemcosRAT

RemcosRAT Description

RemcosRAT is a Remote Access Trojan that is designed to work on the Windows OS platform. RemcosRAT is deployed to PC users via spam email, malvertising, and fake updates for Windows 7, 8 and 10. The threat is named after the primary executable used to facilitate its operations—remcos.exe. AV vendors may detect files related to RemcosRAT under the following tags:

  • BKDR_SOCMER.SM
  • Backdoor:Win32/Rescoms.A!bit
  • Generic.Malware.SL!B.78084EDB
  • HEUR/QVM07.1.0000.Malware.Gen
  • Trj/GdSda.A
  • Trojan.DownLoader22.28028
  • W32/Bloop.A.gen!Eldorado
  • Win32:RemcosRAT-A [Trj]
  • trojandownloader.win32.qqhelper.ka

RemcosRAT is a standard Remote Access Trojan that supports most features you would expect from a RAT. The threat at hand can track what programs are running on the system, index data stored on local drives, make modifications to installed software and issue commands to the Windows kernel. Initial threat assessment revealed that RemcosRAT connects to a remote host via HTPP channel and waits for commands. Attackers could use RemcosRAT to lower your cyber defenses and install apps remotely. RemcosRAT might store its files in the Temp directory where Windows saves temporary Internet files used while you surf the Web. We have reports that RemcosRAT can connect to the 169.159.67.215 IP address and access data on the donemix.duckdns.org site. This portal is flagged by AV vendors and Web filters as unsafe already. Computer users that notice missing programs from their OS and unusual data transmissions might wish to scan their machine with a reliable anti-malware application.

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Technical Information

File System Details

RemcosRAT creates the following file(s):
# File Name Size MD5 Detection Count
1 %ALLUSERSPROFILE%\task manager\7g1cq51137eqs.exe\7g1cq51137eqs.exe 933,888 aeca465c269f3bd7b5f67bc9da8489cb 83
2 321.exe 262,144 d435cebd8266fa44111ece457a1bfba1 45
3 %SYSTEMDRIVE%\users\user\appdata\roaming\microsoft\windows\dsvhelper\windslfj.exe\windslfj.exe 897,536 968650761a5d13c26197dbf26c56552a 5
4 C:\Users\user\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Legit Program.exe 192,512 cd2c23deea7f1eb6b19a42fd3affb0ee 3
5 C:\Users\Roberto\AppData\Roaming\unseen.exe 250,687 d8cff8ec41992f25ef3127e32e379e3b 2
6 file.exe 264,704 8671446732d37b3ad4c120ca2b39cfca 0
7 e12cd6fe497b42212fa8c9c19bf51088 745,472 e12cd6fe497b42212fa8c9c19bf51088 0
8 %SYSTEMDRIVE%\users\user\appdata\roaming\chrome\chrome.exe\chrome.exe 36,864 a087bc63ae1d76d5c1e0a965a1f11e65 0
9 50a62912a3a282b1b11f78f23d0e5906 632,832 50a62912a3a282b1b11f78f23d0e5906 0
More files

Registry Details

RemcosRAT creates the following registry entry or registry entries:
Regexp file mask
%APPDATA%\aitagent\aitagent.exe
%APPDATA%\Analysernes1.exe
%APPDATA%\Audiohd.exe
%APPDATA%\Bagsmks8.exe
%APPDATA%\Behandlingens[RANDOM CHARACTERS].exe
%APPDATA%\Brnevrelser[RANDOM CHARACTERS].exe
%appdata%\calc.exe
%APPDATA%\chrome\chrome.exe
%APPDATA%\deseret.pif
%APPDATA%\explorer\explore.exe
%APPDATA%\Extortioner.exe
%APPDATA%\firewall.exe
%APPDATA%\foc\foc.exe
%APPDATA%\Holmdel8.exe
%APPDATA%\Install\laeu.exe
%APPDATA%\Irenas.exe
%APPDATA%\Javaw\Javaw.exe
%APPDATA%\Machree[RANDOM CHARACTERS].exe
%APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup\filename.exe
%APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup\firewall.vbe
%APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup\Holmdel8.vbe
%APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup\Legit Program.exe
%APPDATA%\Mozila\Mozila.exe
%APPDATA%\newremcos.exe
%APPDATA%\remcos.exe
%APPDATA%\SearchUI.exe
%APPDATA%\Smartse\smartse.exe
%AppData%\spoolsv.exe
%APPDATA%\System\logs.dat
%APPDATA%\Tornlst.exe
%APPDATA%\WindowsDefender\WindowsDefender.exe
%PROGRAMFILES%\AppData\drivers.exe
%TEMP%\Name of the melted file.exe
%WINDIR%\System32\remcomsvc.exe
%WINDIR%\SysWOW64\remcomsvc.exe
Directory
%ALLUSERSPROFILE%\task manager
%APPDATA%\appdata
%APPDATA%\Badlion
%APPDATA%\Extress
%APPDATA%\GoogleChrome
%APPDATA%\googlecrome
%APPDATA%\hyerr
%APPDATA%\JagexLIVE
%APPDATA%\loader
%APPDATA%\pdf
%APPDATA%\Remc
%APPDATA%\remcoco
%AppData%\remcos
%APPDATA%\Shockwave
%APPDATA%\ujmcos
%APPDATA%\verify
%APPDATA%\windir
%PROGRAMFILES(x86)%\Microsft Word
%TEMP%\commonafoldersz
%TEMP%\remcos
%Userprofile%\remcos
%WINDIR%\notepad++
%WINDIR%\remcos
%WINDIR%\System32\rel
%WINDIR%\System32\remcos
%WINDIR%\SysWOW64\Adobe Inc
%WINDIR%\SysWOW64\remcos
%WINDIR%\SysWOW64\skype
Registry key
SOFTWARE\Microsoft\Windows\CurrentVersion\Run\remcos
SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\remcos

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By CagedTech in Trojans
Threat Scorecard
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The ESL Threat Scorecard is an assessment report that is given to every malware threat that has been collected and analyzed through our Malware Research Center. The ESL Threat Scorecard evaluates and ranks each threat by using several metrics such as trends, incidents and severity over time.

In addition to the effective scoring for each threat, we are able to interpret anonymous geographic data to list the top three countries infected with a particular threat. The data used for the ESL Threat Scorecard is updated daily and displayed based on trends for a 30-day period. The ESL Threat Scorecard is a useful tool for a wide array of computer users from end users seeking a solution to remove a particular threat or security experts pursuing analysis and research data on emerging threats.

Each of the fields listed on the ESL Threat Scorecard, containing a specific value, are as follows:

Ranking: The current ranking of a particular threat among all the other threats found on our malware research database.

Threat Level: The level of threat a particular computer threat could have on an infected computer. The threat level is based on a particular threat's behavior and other risk factors. We rate the threat level as low, medium or high. The different threat levels are discussed in the SpyHunter Risk Assessment Model.

Infected Computer: The number of confirmed and suspected cases of a particular threat detected on infected computers retrieved from diagnostic and scan log reports generated by SpyHunter's Spyware Scanner.

% Change: The daily percent change in the frequency of infected computers of a specific threat. The formula for percent changes results from current trends of a specific threat. An increase in the rankings of a specific threat yields a recalculation of the percentage of its recent gain. When a specific threat's ranking decreases, the percentage rate reflects its recent decline. For a specific threat remaining unchanged, the percent change remains in its current state. The % Change data is calculated and displayed in three different date ranges, in the last 24 hours, 7 days and 30 days. Next to the percentage change is the trend movement a specific malware threat does, either upward or downward, in the rankings. Each level of movement is color coded: a green up-arrow (∧) indicates a rise, a red down-arrow (∨) indicates a decline, and a brown equal symbol (=) indicates no change or plateaued.

Top 3 Countries Infected: Lists the top three countries a particular threat has targeted the most over the past month. This data allows computer users to track the geographic distribution of a particular threat throughout the world.
Ranking: N/A
Threat Level: 8
Infected Computers: 17,416