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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-869607583-2483572573-2297019986-1000\Control Panel\International\Geo\Nation	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe

Executes dropped EXE 2 IoCs

pid	Process
3176	AboutSettingsHandlers.exe
5052	AboutSettingsHandlers.exe

AutoIT Executable 4 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/5040-16-0x00000000005F0000-0x0000000000779000-memory.dmp	autoit_exe
behavioral2/memory/5040-19-0x00000000005F0000-0x0000000000779000-memory.dmp	autoit_exe
behavioral2/memory/5040-22-0x00000000005F0000-0x0000000000779000-memory.dmp	autoit_exe
behavioral2/memory/3176-40-0x0000000000E30000-0x0000000000FB9000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 5040 set thread context of 1796	5040	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe	100
PID 3176 set thread context of 5052	3176	AboutSettingsHandlers.exe	120

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

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
4668	schtasks.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1796	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 5040 wrote to memory of 1796	5040	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe	100
PID 5040 wrote to memory of 1796	5040	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe	100
PID 5040 wrote to memory of 1796	5040	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe	100
PID 5040 wrote to memory of 1796	5040	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe	100
PID 5040 wrote to memory of 1796	5040	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe	100
PID 5040 wrote to memory of 4668	5040	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe	104
PID 5040 wrote to memory of 4668	5040	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe	104
PID 5040 wrote to memory of 4668	5040	ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe	104
PID 3176 wrote to memory of 5052	3176	AboutSettingsHandlers.exe	120
PID 3176 wrote to memory of 5052	3176	AboutSettingsHandlers.exe	120
PID 3176 wrote to memory of 5052	3176	AboutSettingsHandlers.exe	120
PID 3176 wrote to memory of 5052	3176	AboutSettingsHandlers.exe	120
PID 3176 wrote to memory of 5052	3176	AboutSettingsHandlers.exe	120

C:\Users\Admin\AppData\Local\Temp\ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe
"C:\Users\Admin\AppData\Local\Temp\ef71e4faa0bfff9dde2a35b462b3ff945f456f7e7717dd7913734d39e0c7a480.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5040
- 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:1796
- 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:4668

C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe
C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3176
- C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe
  "C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe"
  2⤵
  - Executes dropped EXE
  PID:5052

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

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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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
26efcdc5195bfd00b70d48ff03085d87

SHA1
5e9d9ab3332597c12f9419ac38a2356eb60456b2

SHA256
67ce01c7834fb73b169c97231201ad015668cad6014d1438dc6145eb14afe182

SHA512
da9795decb44620d481ec6950ca8a467bc2d1c79b33ca5115a24704fdd63f230cbb951f0910719b1045ce33e2d3b0d1d03f88cbfac1e29cd342b69c361dadbc2

Download Submit
memory/1796-14-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/1796-4-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/1796-10-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/1796-11-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3176-26-0x0000000000E30000-0x0000000000FB9000-memory.dmp

Filesize
1.5MB

Download
memory/3176-28-0x0000000000E00000-0x0000000000E03000-memory.dmp

Filesize
12KB

Download
memory/3176-39-0x0000000000E00000-0x0000000000E03000-memory.dmp

Filesize
12KB

Download
memory/3176-40-0x0000000000E30000-0x0000000000FB9000-memory.dmp

Filesize
1.5MB

Download
memory/5040-15-0x0000000000FB0000-0x0000000000FB3000-memory.dmp

Filesize
12KB

Download
memory/5040-16-0x00000000005F0000-0x0000000000779000-memory.dmp

Filesize
1.5MB

Download
memory/5040-19-0x00000000005F0000-0x0000000000779000-memory.dmp

Filesize
1.5MB

Download
memory/5040-22-0x00000000005F0000-0x0000000000779000-memory.dmp

Filesize
1.5MB

Download
memory/5040-2-0x00000000039E0000-0x00000000039E1000-memory.dmp

Filesize
4KB

Download
memory/5040-0-0x00000000005F0000-0x0000000000779000-memory.dmp

Filesize
1.5MB

Download
memory/5040-1-0x0000000000FB0000-0x0000000000FB3000-memory.dmp

Filesize
12KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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