remcos | 40d8e8b88f224bc5b0686b0154ccec7173ea1251244aff66ecdf1788dc4879cd

General

Target

Backdoor.exe
Size

92KB
MD5

4af287a83510d3a36ee2e591801aae74
SHA1

bdc1a2e9594f7650bcc47711e71f41f1cf0d6bf6
SHA256

40d8e8b88f224bc5b0686b0154ccec7173ea1251244aff66ecdf1788dc4879cd
SHA512

f7c47f734e231206dae6e2b55b8cbaaa7ba01b7c09c15a7f080e7f9a65b8a9c0b7bdaa3c4d66ed34b101af03b98e8d6ede6d022450907024bd6de88eaef25a3d
SSDEEP

1536:AhhW0YTGZWdVseJxaM9kraLdV2QkQ1TbPX8IHOCkIsI4ESHNTh9E+JP19qkP6NrT:GhzYTGWVvJ8f2v1TbPzuMsIFSHNThy+a

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

74.215.232.65:6060

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
remcos.exe
copy_folder
remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
remcos_axwfyanmhaeeahv
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

Executes dropped EXE 1 IoCs

pid	Process
2300	remcos.exe

Loads dropped DLL 2 IoCs

pid	Process
1908	cmd.exe
1908	cmd.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	Backdoor.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	remcos.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2300 set thread context of 2384	2300	remcos.exe	32

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	remcos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iexplore.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Backdoor.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2280	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2280	PING.EXE

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2792 wrote to memory of 1908	2792	Backdoor.exe	28
PID 2792 wrote to memory of 1908	2792	Backdoor.exe	28
PID 2792 wrote to memory of 1908	2792	Backdoor.exe	28
PID 2792 wrote to memory of 1908	2792	Backdoor.exe	28
PID 2792 wrote to memory of 1908	2792	Backdoor.exe	28
PID 2792 wrote to memory of 1908	2792	Backdoor.exe	28
PID 2792 wrote to memory of 1908	2792	Backdoor.exe	28
PID 1908 wrote to memory of 2280	1908	cmd.exe	30
PID 1908 wrote to memory of 2280	1908	cmd.exe	30
PID 1908 wrote to memory of 2280	1908	cmd.exe	30
PID 1908 wrote to memory of 2280	1908	cmd.exe	30
PID 1908 wrote to memory of 2300	1908	cmd.exe	31
PID 1908 wrote to memory of 2300	1908	cmd.exe	31
PID 1908 wrote to memory of 2300	1908	cmd.exe	31
PID 1908 wrote to memory of 2300	1908	cmd.exe	31
PID 2300 wrote to memory of 2384	2300	remcos.exe	32
PID 2300 wrote to memory of 2384	2300	remcos.exe	32
PID 2300 wrote to memory of 2384	2300	remcos.exe	32
PID 2300 wrote to memory of 2384	2300	remcos.exe	32
PID 2300 wrote to memory of 2384	2300	remcos.exe	32
PID 2300 wrote to memory of 2384	2300	remcos.exe	32
PID 2300 wrote to memory of 2384	2300	remcos.exe	32
PID 2300 wrote to memory of 2384	2300	remcos.exe	32
PID 2300 wrote to memory of 2384	2300	remcos.exe	32
PID 2300 wrote to memory of 2384	2300	remcos.exe	32

C:\Users\Admin\AppData\Local\Temp\Backdoor.exe
"C:\Users\Admin\AppData\Local\Temp\Backdoor.exe"
1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2792
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1908
- - C:\Windows\SysWOW64\PING.EXE
    PING 127.0.0.1 -n 2
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2280
- - C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
    "C:\Users\Admin\AppData\Roaming\remcos\remcos.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2300
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
      4⤵
      System Location Discovery: System Language Discovery
      PID:2384

Network

No results found

74.215.232.65:6060

iexplore.exe

152 B
3
74.215.232.65:6060

iexplore.exe

152 B
3
74.215.232.65:6060

iexplore.exe

152 B
3
74.215.232.65:6060

iexplore.exe

152 B
3
74.215.232.65:6060

iexplore.exe

152 B
3
74.215.232.65:6060

iexplore.exe

152 B
3

No results found

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Remote System Discovery

1

T1018

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
99B

MD5
76c1687d97dfdbcea62ef1490bec5001

SHA1
5f4d1aeafa7d840cde67b76f97416dd68efd1bed

SHA256
79f04ea049979ffd2232c459fdd57fae97a5255aea9b4a2c7dce7ead856f37a4

SHA512
da250f0628632a644f159d818a82a8b9cca8224e46843bddbe0f6f9c32a2d04f7736a620af49ab6d77616317ca7d68285e60043965fe86c03d940835bd30a925

Download Submit
\Users\Admin\AppData\Roaming\remcos\remcos.exe

Filesize
92KB

MD5
4af287a83510d3a36ee2e591801aae74

SHA1
bdc1a2e9594f7650bcc47711e71f41f1cf0d6bf6

SHA256
40d8e8b88f224bc5b0686b0154ccec7173ea1251244aff66ecdf1788dc4879cd

SHA512
f7c47f734e231206dae6e2b55b8cbaaa7ba01b7c09c15a7f080e7f9a65b8a9c0b7bdaa3c4d66ed34b101af03b98e8d6ede6d022450907024bd6de88eaef25a3d

Download Submit
memory/2384-14-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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