remcos | f4823b05534473785a9b18be86059a622ebebef574e6741b839845065d4da2ff

General

Target

f4823b05534473785a9b18be86059a622ebebef574e6741b839845065d4da2ff.exe
Size

1.1MB
MD5

dfd6c0e95060bc696ed82390adda4538
SHA1

4773db6c45a2e1c0641d7fd0b94f40df888340d2
SHA256

f4823b05534473785a9b18be86059a622ebebef574e6741b839845065d4da2ff
SHA512

48afa5c90441ba790ba782a8cacac89060f3c55d43cd39d225b3b32be2d80b7ec2e9b9241462293d140ac11e2efcebea720532f0bab2dba1e1a9eb47a8d038ce
SSDEEP

24576:eaTgKwZ14X27uUL3VM0kd+rkhfMsjgkAj2JE06J5N0FU: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-1-5-21-1062200478-553497403-3857448183-1000\Control Panel\International\Geo\Nation	f4823b05534473785a9b18be86059a622ebebef574e6741b839845065d4da2ff.exe

AutoIT Executable 2 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/5016-16-0x0000000000390000-0x0000000000519000-memory.dmp	autoit_exe
behavioral2/memory/5016-21-0x0000000000390000-0x0000000000519000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5016 set thread context of 4396	5016	f4823b05534473785a9b18be86059a622ebebef574e6741b839845065d4da2ff.exe	97

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 3 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	f4823b05534473785a9b18be86059a622ebebef574e6741b839845065d4da2ff.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f4823b05534473785a9b18be86059a622ebebef574e6741b839845065d4da2ff.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
4248	schtasks.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4396	f4823b05534473785a9b18be86059a622ebebef574e6741b839845065d4da2ff.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 5016 wrote to memory of 4396	5016	f4823b05534473785a9b18be86059a622ebebef574e6741b839845065d4da2ff.exe	97
PID 5016 wrote to memory of 4396	5016	f4823b05534473785a9b18be86059a622ebebef574e6741b839845065d4da2ff.exe	97
PID 5016 wrote to memory of 4396	5016	f4823b05534473785a9b18be86059a622ebebef574e6741b839845065d4da2ff.exe	97
PID 5016 wrote to memory of 4396	5016	f4823b05534473785a9b18be86059a622ebebef574e6741b839845065d4da2ff.exe	97
PID 5016 wrote to memory of 4396	5016	f4823b05534473785a9b18be86059a622ebebef574e6741b839845065d4da2ff.exe	97
PID 5016 wrote to memory of 4248	5016	f4823b05534473785a9b18be86059a622ebebef574e6741b839845065d4da2ff.exe	101
PID 5016 wrote to memory of 4248	5016	f4823b05534473785a9b18be86059a622ebebef574e6741b839845065d4da2ff.exe	101
PID 5016 wrote to memory of 4248	5016	f4823b05534473785a9b18be86059a622ebebef574e6741b839845065d4da2ff.exe	101

C:\Users\Admin\AppData\Local\Temp\f4823b05534473785a9b18be86059a622ebebef574e6741b839845065d4da2ff.exe
"C:\Users\Admin\AppData\Local\Temp\f4823b05534473785a9b18be86059a622ebebef574e6741b839845065d4da2ff.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5016
- C:\Users\Admin\AppData\Local\Temp\f4823b05534473785a9b18be86059a622ebebef574e6741b839845065d4da2ff.exe
  "C:\Users\Admin\AppData\Local\Temp\f4823b05534473785a9b18be86059a622ebebef574e6741b839845065d4da2ff.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:4396
- 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:4248

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\remcos\logs.dat

Filesize
79B

MD5
95ea66edc12025272294c499f49a4dfb

SHA1
4e588b6deadcf32956ae6b9f8acc407faa29c57f

SHA256
5863276f89e98366e8e7d95f4596db4988c18cd58dde536f9a045c5fd5ca1c75

SHA512
56dccdba45239d6c5d3eda03dc930891d970e1024cf7dd965bbc5c2f77003d937950067475b7a3a540255617e7de4f180516752c390d0a861b0458e17dc7746a

Download Submit
memory/4396-4-0x0000000000AC0000-0x0000000000AE0000-memory.dmp

Filesize
128KB

Download
memory/4396-10-0x0000000000AC0000-0x0000000000AE0000-memory.dmp

Filesize
128KB

Download
memory/4396-11-0x0000000000AC0000-0x0000000000AE0000-memory.dmp

Filesize
128KB

Download
memory/4396-14-0x0000000000AC0000-0x0000000000AE0000-memory.dmp

Filesize
128KB

Download
memory/5016-0-0x0000000000390000-0x0000000000519000-memory.dmp

Filesize
1.5MB

Download
memory/5016-1-0x0000000000F70000-0x0000000000F73000-memory.dmp

Filesize
12KB

Download
memory/5016-2-0x0000000001100000-0x0000000001101000-memory.dmp

Filesize
4KB

Download
memory/5016-15-0x0000000000F70000-0x0000000000F73000-memory.dmp

Filesize
12KB

Download
memory/5016-16-0x0000000000390000-0x0000000000519000-memory.dmp

Filesize
1.5MB

Download
memory/5016-21-0x0000000000390000-0x0000000000519000-memory.dmp

Filesize
1.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads