remcos | ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480

General

Target

ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe
Size

1.1MB
MD5

d447175eba4179d0762edb381a2e329e
SHA1

a12689090c983f2bfab8fcfc34feff23205c9db2
SHA256

ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480
SHA512

765275ffc53be3cd77bd2420feaa705929f335b59c2267f411cc6c30b3c6c5e5e73f57e7605e082ce0ea88176734b56a1e9da21af05c936621c6b662471c5b6a
SSDEEP

24576:eaTgKwZ14X27uUL3VM0kd+rkhfMsjgkAj2JE06J5N0F0:LTgdZOcuUL3xAx/8b2S7Z0e

Score

10^/10

remcos chinemerem discovery rat

Malware Config

Extracted

Family

remcos

Version

2.2.2 Pro

Botnet

chinemerem

C2

remcoss.onmypc.org:3765

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
true
install_flag
false
install_path
%AppData%
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
r-8ET8H0
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
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
Remcos family
remcos

Executes dropped EXE 2 IoCs

pid	Process
2668	AboutSettingsHandlers.exe
3040	AboutSettingsHandlers.exe

AutoIT Executable 4 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/memory/2444-20-0x0000000000A80000-0x0000000000C09000-memory.dmp	autoit_exe
behavioral1/memory/2444-25-0x0000000000A80000-0x0000000000C09000-memory.dmp	autoit_exe
behavioral1/memory/2668-43-0x0000000000930000-0x0000000000AB9000-memory.dmp	autoit_exe
behavioral1/memory/2668-46-0x0000000000930000-0x0000000000AB9000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2444 set thread context of 2448	2444	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe	30
PID 2668 set thread context of 3040	2668	AboutSettingsHandlers.exe	35

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 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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AboutSettingsHandlers.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2824	schtasks.exe
2624	schtasks.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2448	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2444 wrote to memory of 2448	2444	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe	30
PID 2444 wrote to memory of 2448	2444	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe	30
PID 2444 wrote to memory of 2448	2444	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe	30
PID 2444 wrote to memory of 2448	2444	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe	30
PID 2444 wrote to memory of 2448	2444	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe	30
PID 2444 wrote to memory of 2448	2444	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe	30
PID 2444 wrote to memory of 2624	2444	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe	31
PID 2444 wrote to memory of 2624	2444	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe	31
PID 2444 wrote to memory of 2624	2444	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe	31
PID 2444 wrote to memory of 2624	2444	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe	31
PID 2592 wrote to memory of 2668	2592	taskeng.exe	34
PID 2592 wrote to memory of 2668	2592	taskeng.exe	34
PID 2592 wrote to memory of 2668	2592	taskeng.exe	34
PID 2592 wrote to memory of 2668	2592	taskeng.exe	34
PID 2668 wrote to memory of 3040	2668	AboutSettingsHandlers.exe	35
PID 2668 wrote to memory of 3040	2668	AboutSettingsHandlers.exe	35
PID 2668 wrote to memory of 3040	2668	AboutSettingsHandlers.exe	35
PID 2668 wrote to memory of 3040	2668	AboutSettingsHandlers.exe	35
PID 2668 wrote to memory of 3040	2668	AboutSettingsHandlers.exe	35
PID 2668 wrote to memory of 3040	2668	AboutSettingsHandlers.exe	35
PID 2668 wrote to memory of 2824	2668	AboutSettingsHandlers.exe	36
PID 2668 wrote to memory of 2824	2668	AboutSettingsHandlers.exe	36
PID 2668 wrote to memory of 2824	2668	AboutSettingsHandlers.exe	36
PID 2668 wrote to memory of 2824	2668	AboutSettingsHandlers.exe	36

C:\Users\Admin\AppData\Local\Temp\ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe
"C:\Users\Admin\AppData\Local\Temp\ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2444
- C:\Users\Admin\AppData\Local\Temp\ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe
  "C:\Users\Admin\AppData\Local\Temp\ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2448
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\SysWOW64\schtasks.exe" /create /tn SystemSettingsAdminFlows /tr "C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe" /sc minute /mo 1 /F
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2624

C:\Windows\system32\taskeng.exe
taskeng.exe {651ED465-9EB7-47A6-9A09-78DE6CDC7BA3} S-1-5-21-3063565911-2056067323-3330884624-1000:KHBTHJFA\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2592
- C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe
  C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2668
- - C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe
    "C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe"
    3⤵
    - Executes dropped EXE
    PID:3040
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\SysWOW64\schtasks.exe" /create /tn SystemSettingsAdminFlows /tr "C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe" /sc minute /mo 1 /F
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2824

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe

Filesize
1.1MB

MD5
2d3ff6d476ec268d6e51fb98e9557482

SHA1
afff2b116f9365653f784f7efe36d29ee5408e75

SHA256
f482eb76e65a2e9d9392fb255a00d271346fb95501040f9e7bc84eee3c7f4c76

SHA512
dbb94a7319609b0582fde6f669ff481d3ff51f5b6481086a82bfd46fd7fa162c77b6afe06a99f99f01cf6192a43a463ab748ec1a175c5e725cdd14bc18835678

Download Submit
C:\Users\Admin\AppData\Roaming\remcos\logs.dat

Filesize
79B

MD5
82c9e17ed62bab83f06e92b2d80365c1

SHA1
6973fe978e6323ff74a82658c7e0b6523405f397

SHA256
68d360850a656d081cb48cafceb6ec4f011b63f08798eddde757f482a5b1f383

SHA512
a40fb5fd7a4e100038fd80aa24cbd1a1bee3ca61095c014a44423fcf59074c010b63adb4b08c234522a5f685251a1041d1190a4d48ef23565bd1566e911bed39

Download Submit
memory/2444-0-0x0000000000A80000-0x0000000000C09000-memory.dmp

Filesize
1.5MB

Download
memory/2444-1-0x0000000000070000-0x0000000000073000-memory.dmp

Filesize
12KB

Download
memory/2444-2-0x00000000001F0000-0x00000000001F1000-memory.dmp

Filesize
4KB

Download
memory/2444-25-0x0000000000A80000-0x0000000000C09000-memory.dmp

Filesize
1.5MB

Download
memory/2444-20-0x0000000000A80000-0x0000000000C09000-memory.dmp

Filesize
1.5MB

Download
memory/2448-14-0x0000000000070000-0x0000000000090000-memory.dmp

Filesize
128KB

Download
memory/2448-15-0x0000000000070000-0x0000000000090000-memory.dmp

Filesize
128KB

Download
memory/2448-3-0x0000000000070000-0x0000000000090000-memory.dmp

Filesize
128KB

Download
memory/2448-18-0x0000000000A80000-0x0000000000C09000-memory.dmp

Filesize
1.5MB

Download
memory/2448-19-0x0000000000070000-0x0000000000090000-memory.dmp

Filesize
128KB

Download
memory/2448-11-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2448-5-0x0000000000070000-0x0000000000090000-memory.dmp

Filesize
128KB

Download
memory/2668-30-0x0000000000930000-0x0000000000AB9000-memory.dmp

Filesize
1.5MB

Download
memory/2668-43-0x0000000000930000-0x0000000000AB9000-memory.dmp

Filesize
1.5MB

Download
memory/2668-46-0x0000000000930000-0x0000000000AB9000-memory.dmp

Filesize
1.5MB

Download
memory/3040-38-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads