remcos | 0d6e873aa8faee0a896e6ac7679a216585933bc29bdd2c1bc006ce56a6e86818

Analysis

max time kernel
146s
max time network
123s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
03-03-2024 01:13

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General

Target

RAT/Remcos.exe
Size

92KB
MD5

fb598b93c04baafe98683dc210e779c9
SHA1

c7ccd43a721a508b807c9bf6d774344df58e752f
SHA256

c851749fd6c9fa19293d8ee2c5b45b3dc8561115ddfe7166fbaefcb9b353b7c4
SHA512

1185ffe7e296eaaae50b7bd63baa6ffb8f5e76d4a897cb3800cead507a67c4e5075e677abdbf9831f3f81d01bdf1c06675a7c21985ef20a4bae5a256fd41cc0f
SSDEEP

1536:AhhW0YTGZWdVseJxaM9kraLdV2QkQ1TbPX8IHOCkIsI4ESHNTh9E+JP19qkP6brM:GhzYTGWVvJ8f2v1TbPzuMsIFSHNThy+7

Score

10^/10

remcos host evasion persistence rat trojan

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

nickman12-46565.portmap.io:46565

nickman12-46565.portmap.io:1735

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
Userdata.exe
copy_folder
Userdata
delete_file
true
hide_file
true
hide_keylog_file
true
install_flag
true
install_path
%WinDir%\System32
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%WinDir%\System32
mouse_option
false
mutex
remcos_vcexssuhap
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
remcos
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

UAC bypass 3 TTPs 3 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

reg.exereg.exereg.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1956 cmd.exe
Executes dropped EXE 1 IoCs

Processes:

Userdata.exe

pid process

2600 Userdata.exe
Loads dropped DLL 2 IoCs

Processes:

cmd.exe

pid process

1956 cmd.exe
1956 cmd.exe

pid	process
1956	cmd.exe

pid	process
2600	Userdata.exe

pid	process
1956	cmd.exe
1956	cmd.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

Remcos.exeUserdata.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Windows\\SysWOW64\\Userdata\\Userdata.exe\""	Remcos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Windows\\SysWOW64\\Userdata\\Userdata.exe\""	Userdata.exe

Drops file in System32 directory 5 IoCs

Processes:

Remcos.exeiexplore.exe

description	ioc	process
File created	C:\Windows\SysWOW64\Userdata\Userdata.exe	Remcos.exe
File opened for modification	C:\Windows\SysWOW64\Userdata\Userdata.exe	Remcos.exe
File opened for modification	C:\Windows\SysWOW64\Userdata	Remcos.exe
File opened for modification	C:\Windows\SysWOW64\remcos\logs.dat	iexplore.exe
File created	C:\Windows\SysWOW64\remcos\logs.dat	iexplore.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

Userdata.exe

description pid process target process

PID 2600 set thread context of 2380 2600 Userdata.exe iexplore.exe
Modifies registry key 1 TTPs 3 IoCs

Modify Registry
T1112

Processes:

reg.exereg.exereg.exe

pid process

2512 reg.exe
2532 reg.exe
2400 reg.exe
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

2572 PING.EXE
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

iexplore.exe

pid process

2380 iexplore.exe

description	pid	process	target process
PID 2600 set thread context of 2380	2600	Userdata.exe	iexplore.exe

pid	process
2512	reg.exe
2532	reg.exe
2400	reg.exe

pid	process
2572	PING.EXE

pid	process
2380	iexplore.exe

Suspicious use of WriteProcessMemory 49 IoCs

Processes:

Remcos.execmd.execmd.exeUserdata.exeiexplore.execmd.execmd.exe

description	pid	process	target process
PID 2856 wrote to memory of 2968	2856	Remcos.exe	cmd.exe
PID 2856 wrote to memory of 2968	2856	Remcos.exe	cmd.exe
PID 2856 wrote to memory of 2968	2856	Remcos.exe	cmd.exe
PID 2856 wrote to memory of 2968	2856	Remcos.exe	cmd.exe
PID 2856 wrote to memory of 1956	2856	Remcos.exe	cmd.exe
PID 2856 wrote to memory of 1956	2856	Remcos.exe	cmd.exe
PID 2856 wrote to memory of 1956	2856	Remcos.exe	cmd.exe
PID 2856 wrote to memory of 1956	2856	Remcos.exe	cmd.exe
PID 2856 wrote to memory of 1956	2856	Remcos.exe	cmd.exe
PID 2856 wrote to memory of 1956	2856	Remcos.exe	cmd.exe
PID 2856 wrote to memory of 1956	2856	Remcos.exe	cmd.exe
PID 2968 wrote to memory of 2512	2968	cmd.exe	reg.exe
PID 2968 wrote to memory of 2512	2968	cmd.exe	reg.exe
PID 2968 wrote to memory of 2512	2968	cmd.exe	reg.exe
PID 2968 wrote to memory of 2512	2968	cmd.exe	reg.exe
PID 1956 wrote to memory of 2572	1956	cmd.exe	PING.EXE
PID 1956 wrote to memory of 2572	1956	cmd.exe	PING.EXE
PID 1956 wrote to memory of 2572	1956	cmd.exe	PING.EXE
PID 1956 wrote to memory of 2572	1956	cmd.exe	PING.EXE
PID 1956 wrote to memory of 2600	1956	cmd.exe	Userdata.exe
PID 1956 wrote to memory of 2600	1956	cmd.exe	Userdata.exe
PID 1956 wrote to memory of 2600	1956	cmd.exe	Userdata.exe
PID 1956 wrote to memory of 2600	1956	cmd.exe	Userdata.exe
PID 2600 wrote to memory of 2496	2600	Userdata.exe	cmd.exe
PID 2600 wrote to memory of 2496	2600	Userdata.exe	cmd.exe
PID 2600 wrote to memory of 2496	2600	Userdata.exe	cmd.exe
PID 2600 wrote to memory of 2496	2600	Userdata.exe	cmd.exe
PID 2600 wrote to memory of 2380	2600	Userdata.exe	iexplore.exe
PID 2600 wrote to memory of 2380	2600	Userdata.exe	iexplore.exe
PID 2600 wrote to memory of 2380	2600	Userdata.exe	iexplore.exe
PID 2600 wrote to memory of 2380	2600	Userdata.exe	iexplore.exe
PID 2600 wrote to memory of 2380	2600	Userdata.exe	iexplore.exe
PID 2600 wrote to memory of 2380	2600	Userdata.exe	iexplore.exe
PID 2600 wrote to memory of 2380	2600	Userdata.exe	iexplore.exe
PID 2600 wrote to memory of 2380	2600	Userdata.exe	iexplore.exe
PID 2600 wrote to memory of 2380	2600	Userdata.exe	iexplore.exe
PID 2600 wrote to memory of 2380	2600	Userdata.exe	iexplore.exe
PID 2380 wrote to memory of 2668	2380	iexplore.exe	cmd.exe
PID 2380 wrote to memory of 2668	2380	iexplore.exe	cmd.exe
PID 2380 wrote to memory of 2668	2380	iexplore.exe	cmd.exe
PID 2380 wrote to memory of 2668	2380	iexplore.exe	cmd.exe
PID 2496 wrote to memory of 2532	2496	cmd.exe	reg.exe
PID 2496 wrote to memory of 2532	2496	cmd.exe	reg.exe
PID 2496 wrote to memory of 2532	2496	cmd.exe	reg.exe
PID 2496 wrote to memory of 2532	2496	cmd.exe	reg.exe
PID 2668 wrote to memory of 2400	2668	cmd.exe	reg.exe
PID 2668 wrote to memory of 2400	2668	cmd.exe	reg.exe
PID 2668 wrote to memory of 2400	2668	cmd.exe	reg.exe
PID 2668 wrote to memory of 2400	2668	cmd.exe	reg.exe

C:\Users\Admin\AppData\Local\Temp\RAT\Remcos.exe
"C:\Users\Admin\AppData\Local\Temp\RAT\Remcos.exe"
1⤵
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2856
- C:\Windows\SysWOW64\cmd.exe
  /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2968
- - C:\Windows\SysWOW64\reg.exe
    C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
    3⤵
    - UAC bypass
    - Modifies registry key
    PID:2512
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
  2⤵
  - Deletes itself
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1956
- - C:\Windows\SysWOW64\PING.EXE
    PING 127.0.0.1 -n 2
    3⤵
    - Runs ping.exe
    PID:2572
- - C:\Windows\SysWOW64\Userdata\Userdata.exe
    "C:\Windows\SysWOW64\Userdata\Userdata.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2600
  - - C:\Windows\SysWOW64\cmd.exe
      /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2496
    - - C:\Windows\SysWOW64\reg.exe
        
        C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        5⤵
        UAC bypass
        Modifies registry key
        
        PID:2532
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
      4⤵
      Drops file in System32 directory
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:2380
    - - C:\Windows\SysWOW64\cmd.exe
        
        /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2668
      - C:\Windows\SysWOW64\reg.exe
        
        C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        6⤵
        UAC bypass
        Modifies registry key
        
        PID:2400

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

Remote System Discovery

T1018

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\install.bat

Filesize
148B

MD5
43bb14202009886c1eef88edffd2d3ef

SHA1
02a9ef66f2a585c6f2f7b86042a5aa211be824c9

SHA256
da483866490b19391640699ec0e0bd2fe4a78b94879eb99cdc7dafc80bce6b62

SHA512
c93ea027189e96741e1f43c4bdd1c60c11115f67eddea54417a6c0e1252a689311d7d951d3c2e5ba803ecc842da435587413091fc1cf7396951a22a92db2ea83

Download Submit
\Windows\SysWOW64\Userdata\Userdata.exe

Filesize
92KB

MD5
fb598b93c04baafe98683dc210e779c9

SHA1
c7ccd43a721a508b807c9bf6d774344df58e752f

SHA256
c851749fd6c9fa19293d8ee2c5b45b3dc8561115ddfe7166fbaefcb9b353b7c4

SHA512
1185ffe7e296eaaae50b7bd63baa6ffb8f5e76d4a897cb3800cead507a67c4e5075e677abdbf9831f3f81d01bdf1c06675a7c21985ef20a4bae5a256fd41cc0f

Download Submit
memory/2380-15-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

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