remcos | 6c534844443ad2f955022b0c2050961c2ad5e825289be7f1299d6e3a7451a9f8

General

Target
tmpxw14mbek.exe
Size 96KB
Sample260601-2agg5shw8j
SHA256 6c534844443ad2f955022b0c2050961c2ad5e825289be7f1299d6e3a7451a9f8
MD5 5253f2e67a73b0767a27e1e9c67e9129
SHA1 31e606e2b4940383976d252cdfb69b74a76b9044
SHA512 53b27710e5a653a70761b12d2557cd165126568ddcc69861cddae8c4724a80d0892aba9b699452ea673e796d65217a823ebe544cea61b5d6b0211a04170a7e40
SSDEEP 1536:whhW0YTGZWdVseJxaM9kraLdV2QkQ1TbPX8IHOCkIsI4ESHNTh9E+JP19qkP6XrB:WhzYTGWVvJ8f2v1TbPzuMsIFSHNThy+C
TLSH
T1EEA3D717BA4BD0B3E42191F186826BA18FBC7C3336462137D78FC9419DB8486D456EFA
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

host discovery remcos persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

j88bet.pro:443
u888lm.com:443
u888.ru.com:443
u888.org.vc:443
uu888.gb.net:443
u888.training:443
u88o.com:443
u888co.com:443
u888.it.com:443
u888b.info:443
u88.art:443
u888com.me:443
j88.ninja:443
1j88.blue:443
j88com.today:443
j88t.club:443
u88.lol:443
u88.ae.org:443
u88.lifestyle:443
u88.sa.com:443
u888np.com:443
1u888com.com:443
j88.lat:443
m-u888.co.com:443
u888az.dev:443
u888com.biz:443
u88.fund:443
u888ny.com:443
u88.cheap:443
u888vip.app:443
j88vm.com:443
u88.wang:443
u88.store:443
m-u88.com:443
88j.co.com:443

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_pftknifuitnaqpl
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

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

Executes dropped EXE 2 IoCs

pid	Process
2224	remcos.exe
3832	remcos.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-1-5-21-1679180529-4058988202-686829476-1000\Software\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	tmpxw14mbek.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1679180529-4058988202-686829476-1000\Software\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	remcos.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 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	tmpxw14mbek.exe
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

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
4972	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4972	PING.EXE

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2224	remcos.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2224	remcos.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4072 wrote to memory of 3716	4072	tmpxw14mbek.exe	82
PID 3716 wrote to memory of 4972	3716	cmd.exe	84
PID 3716 wrote to memory of 3832	3716	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\tmpxw14mbek.exe
"C:\Users\Admin\AppData\Local\Temp\tmpxw14mbek.exe"
1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4072
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3716
- - 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:4972
- - C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
    "C:\Users\Admin\AppData\Roaming\remcos\remcos.exe"
    3⤵
    - Executes dropped EXE
    PID:3832

C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
"C:\Users\Admin\AppData\Roaming\remcos\remcos.exe"
1⤵
- Executes dropped EXE
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:2224

Network

MITRE ATT&CK Enterprise v16

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 Information Discovery

1

T1082

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

install.bat

Path C:\Users\Admin\AppData\Local\Temp\install.bat
Size 99B
SHA256 79f04ea049979ffd2232c459fdd57fae97a5255aea9b4a2c7dce7ead856f37a4
MD5 76c1687d97dfdbcea62ef1490bec5001
SHA1 5f4d1aeafa7d840cde67b76f97416dd68efd1bed
SHA512 da250f0628632a644f159d818a82a8b9cca8224e46843bddbe0f6f9c32a2d04f7736a620af49ab6d77616317ca7d68285e60043965fe86c03d940835bd30a925
TLSH
T11CB012320B8089FF291315B70DFCB99DE01189C16A1634885A0B096825A2400F4C2600
MD5 SHA1 SHA512 TLSH

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remcos.exe

Path C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
Size 96KB
SHA256 6c534844443ad2f955022b0c2050961c2ad5e825289be7f1299d6e3a7451a9f8
MD5 5253f2e67a73b0767a27e1e9c67e9129
SHA1 31e606e2b4940383976d252cdfb69b74a76b9044
SHA512 53b27710e5a653a70761b12d2557cd165126568ddcc69861cddae8c4724a80d0892aba9b699452ea673e796d65217a823ebe544cea61b5d6b0211a04170a7e40
SSDEEP 1536:whhW0YTGZWdVseJxaM9kraLdV2QkQ1TbPX8IHOCkIsI4ESHNTh9E+JP19qkP6XrB:WhzYTGWVvJ8f2v1TbPzuMsIFSHNThy+C
TLSH
T1EEA3D717BA4BD0B3E42191F186826BA18FBC7C3336462137D78FC9419DB8486D456EFA
MD5 SHA1 SHA512 SSDEEP TLSH

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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