remcos | cb56004f9171776bc09c3796fbead68b88f75564787c8ee2f03294099d1c78f1

General

Target

cb56004f9171776bc09c3796fbead68b88f75564787c8ee2f03294099d1c78f1.exe
Size

1.1MB
MD5

20e60d89e273331ee5c9c55168663c10
SHA1

43f4f20722481704800a8a14eb83c5ee1d7c3d29
SHA256

cb56004f9171776bc09c3796fbead68b88f75564787c8ee2f03294099d1c78f1
SHA512

1fc31a9915419dd6a7c1598eb8e80189fff16448e49835a53fa950e2f62e41f7753b16ff3d2019a1c74fcf5b8d4657c244471918f39c6d82345e07d5dd51d318
SSDEEP

24576:eaTgKwZ14X27uUL3VM0kd+rkhfMsjgkAj2JE06J5N0FS:LTgdZOcuUL3xAx/8b2S7Z0k

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-1-5-21-446031748-3036493239-2009529691-1000\Control Panel\International\Geo\Nation	cb56004f9171776bc09c3796fbead68b88f75564787c8ee2f03294099d1c78f1.exe

Executes dropped EXE 2 IoCs

pid	Process
1920	AboutSettingsHandlers.exe
2044	AboutSettingsHandlers.exe

AutoIT Executable 3 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/4164-16-0x0000000000D10000-0x0000000000E99000-memory.dmp	autoit_exe
behavioral2/memory/4164-19-0x0000000000D10000-0x0000000000E99000-memory.dmp	autoit_exe
behavioral2/memory/4164-22-0x0000000000D10000-0x0000000000E99000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4164 set thread context of 5020	4164	cb56004f9171776bc09c3796fbead68b88f75564787c8ee2f03294099d1c78f1.exe	94
PID 1920 set thread context of 2044	1920	AboutSettingsHandlers.exe	109

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	cb56004f9171776bc09c3796fbead68b88f75564787c8ee2f03294099d1c78f1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cb56004f9171776bc09c3796fbead68b88f75564787c8ee2f03294099d1c78f1.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 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
3412	schtasks.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5020	cb56004f9171776bc09c3796fbead68b88f75564787c8ee2f03294099d1c78f1.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 4164 wrote to memory of 5020	4164	cb56004f9171776bc09c3796fbead68b88f75564787c8ee2f03294099d1c78f1.exe	94
PID 4164 wrote to memory of 5020	4164	cb56004f9171776bc09c3796fbead68b88f75564787c8ee2f03294099d1c78f1.exe	94
PID 4164 wrote to memory of 5020	4164	cb56004f9171776bc09c3796fbead68b88f75564787c8ee2f03294099d1c78f1.exe	94
PID 4164 wrote to memory of 5020	4164	cb56004f9171776bc09c3796fbead68b88f75564787c8ee2f03294099d1c78f1.exe	94
PID 4164 wrote to memory of 5020	4164	cb56004f9171776bc09c3796fbead68b88f75564787c8ee2f03294099d1c78f1.exe	94
PID 4164 wrote to memory of 3412	4164	cb56004f9171776bc09c3796fbead68b88f75564787c8ee2f03294099d1c78f1.exe	98
PID 4164 wrote to memory of 3412	4164	cb56004f9171776bc09c3796fbead68b88f75564787c8ee2f03294099d1c78f1.exe	98
PID 4164 wrote to memory of 3412	4164	cb56004f9171776bc09c3796fbead68b88f75564787c8ee2f03294099d1c78f1.exe	98
PID 1920 wrote to memory of 2044	1920	AboutSettingsHandlers.exe	109
PID 1920 wrote to memory of 2044	1920	AboutSettingsHandlers.exe	109
PID 1920 wrote to memory of 2044	1920	AboutSettingsHandlers.exe	109
PID 1920 wrote to memory of 2044	1920	AboutSettingsHandlers.exe	109
PID 1920 wrote to memory of 2044	1920	AboutSettingsHandlers.exe	109

C:\Users\Admin\AppData\Local\Temp\cb56004f9171776bc09c3796fbead68b88f75564787c8ee2f03294099d1c78f1.exe
"C:\Users\Admin\AppData\Local\Temp\cb56004f9171776bc09c3796fbead68b88f75564787c8ee2f03294099d1c78f1.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4164
- C:\Users\Admin\AppData\Local\Temp\cb56004f9171776bc09c3796fbead68b88f75564787c8ee2f03294099d1c78f1.exe
  "C:\Users\Admin\AppData\Local\Temp\cb56004f9171776bc09c3796fbead68b88f75564787c8ee2f03294099d1c78f1.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:5020
- 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:3412

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:1920
- C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe
  "C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe"
  2⤵
  - Executes dropped EXE
  PID:2044

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
edf2cfc8ab9f9d7501e4aa738fc5649a

SHA1
7aeed5c96a6b8530bdead8bf4f2655e0558e9b67

SHA256
1f54f02f6f41da4b87d9227eec489835b8d830c59f6e3016925de164498d226e

SHA512
4abf87062b43820ca22115d2503ea9ebc190ff81065cfb6cf1fb85fa0c9d11a59d0a852508322b527ec45f3b5aedecb822ceed60e67b8a6f7a9de2f60f4dbcb3

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

Filesize
79B

MD5
82e132ec3201ee46c55cab3fbd11f158

SHA1
1dc8bc0d34d0f32125a8a2dbd18cfa25347a25e0

SHA256
1145916f3cda54b2d47fed8652f231f6f862f73141a08e467563fa069f331288

SHA512
837aee501c1db1df21077b03403642b8822978d0283895121339b307a66faa94e264db8e4ca33e9c1976e7204bdbd4f124605a6cf37d8b4de0c44bb721f6b126

Download Submit
memory/1920-29-0x0000000001160000-0x0000000001163000-memory.dmp

Filesize
12KB

Download
memory/1920-27-0x00000000007C0000-0x0000000000949000-memory.dmp

Filesize
1.5MB

Download
memory/4164-1-0x0000000000AB0000-0x0000000000AB3000-memory.dmp

Filesize
12KB

Download
memory/4164-2-0x0000000000BD0000-0x0000000000BD1000-memory.dmp

Filesize
4KB

Download
memory/4164-0-0x0000000000D10000-0x0000000000E99000-memory.dmp

Filesize
1.5MB

Download
memory/4164-15-0x0000000000AB0000-0x0000000000AB3000-memory.dmp

Filesize
12KB

Download
memory/4164-16-0x0000000000D10000-0x0000000000E99000-memory.dmp

Filesize
1.5MB

Download
memory/4164-19-0x0000000000D10000-0x0000000000E99000-memory.dmp

Filesize
1.5MB

Download
memory/4164-22-0x0000000000D10000-0x0000000000E99000-memory.dmp

Filesize
1.5MB

Download
memory/5020-3-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5020-14-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5020-11-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5020-10-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads