remcos | b47bab6180af2d5a6d5317d311fbd94704c8504cc9bfe33014be4256fdce5531

General

Target

a11a0d0058f12a5ce73448b24653fa20N.exe
Size

139KB
MD5

a11a0d0058f12a5ce73448b24653fa20
SHA1

ea55a5ac974cabf8d4d3a4ac27e28ccd00571e53
SHA256

b47bab6180af2d5a6d5317d311fbd94704c8504cc9bfe33014be4256fdce5531
SHA512

f3c465e26281d6d33713f2f9a734785e24a8ffbaff43b9a1b566311cd065f68fa7ad2c76ecd6801605eff75b3f0efb8a6157818b8fb755cf8d52ee49714b1e80
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIH4:xP6/M+WLckOBhVmI1

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

systemcontrol.ddns.net:45000

systemcontrol2.ddns.net:45000

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
OfficeUpgrade.exe
copy_folder
OfficeUpgrade
delete_file
false
hide_file
true
hide_keylog_file
true
install_flag
false
install_path
%AppData%
keylog_crypt
true
keylog_file
Upgrader.dat
keylog_flag
false
keylog_folder
Upgrader
keylog_path
%AppData%
mouse_option
false
mutex
req_khauflaoyr
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
OfficeUpgrade
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Processes:

a11a0d0058f12a5ce73448b24653fa20N.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-701583114-2636601053-947405450-1000\Control Panel\International\Geo\Nation	a11a0d0058f12a5ce73448b24653fa20N.exe

Executes dropped EXE 2 IoCs

Processes:

wn2ra4ohzdr.exewn2ra4ohzdr.exe

pid process

1180 wn2ra4ohzdr.exe
3052 wn2ra4ohzdr.exe

pid	process
1180	wn2ra4ohzdr.exe
3052	wn2ra4ohzdr.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

a11a0d0058f12a5ce73448b24653fa20N.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-701583114-2636601053-947405450-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	a11a0d0058f12a5ce73448b24653fa20N.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

wn2ra4ohzdr.exe

description pid process target process

PID 1180 set thread context of 3052 1180 wn2ra4ohzdr.exe wn2ra4ohzdr.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

description	pid	process	target process
PID 1180 set thread context of 3052	1180	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe

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

Processes:

a11a0d0058f12a5ce73448b24653fa20N.exewn2ra4ohzdr.exewn2ra4ohzdr.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a11a0d0058f12a5ce73448b24653fa20N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wn2ra4ohzdr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wn2ra4ohzdr.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

wn2ra4ohzdr.exe

pid process

3052 wn2ra4ohzdr.exe

pid	process
3052	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

a11a0d0058f12a5ce73448b24653fa20N.exewn2ra4ohzdr.exe

description	pid	process	target process
PID 4048 wrote to memory of 1180	4048	a11a0d0058f12a5ce73448b24653fa20N.exe	wn2ra4ohzdr.exe
PID 4048 wrote to memory of 1180	4048	a11a0d0058f12a5ce73448b24653fa20N.exe	wn2ra4ohzdr.exe
PID 4048 wrote to memory of 1180	4048	a11a0d0058f12a5ce73448b24653fa20N.exe	wn2ra4ohzdr.exe
PID 1180 wrote to memory of 3052	1180	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 1180 wrote to memory of 3052	1180	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 1180 wrote to memory of 3052	1180	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 1180 wrote to memory of 3052	1180	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 1180 wrote to memory of 3052	1180	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 1180 wrote to memory of 3052	1180	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 1180 wrote to memory of 3052	1180	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 1180 wrote to memory of 3052	1180	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 1180 wrote to memory of 3052	1180	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe

C:\Users\Admin\AppData\Local\Temp\a11a0d0058f12a5ce73448b24653fa20N.exe
"C:\Users\Admin\AppData\Local\Temp\a11a0d0058f12a5ce73448b24653fa20N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4048

C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
"C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1180

C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
"C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"
3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
PID:3052

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
Filesize
139KB

MD5
d20cde0cac2575480da70677ea4761c5

SHA1
8c6e5625eb68c7663c4d36d5ec096e1816269aac

SHA256
c927f5f6070359af17a396b99f5a239eb1a888a9f49488904d21f60a3baad32e

SHA512
1c3c669262f926e0421fa44ca00e063367c4bc08d362fc0cb1ec06f9529a084e6f0e7724c049bd76052a9e5707fc9ce77b770e0dd6e0f19c734658a9c7ff5863

Download Submit
memory/1180-34-0x0000000074D50000-0x0000000075500000-memory.dmp

Filesize
7.7MB

Download
memory/1180-22-0x0000000074D50000-0x0000000075500000-memory.dmp

Filesize
7.7MB

Download
memory/1180-20-0x0000000074D50000-0x0000000075500000-memory.dmp

Filesize
7.7MB

Download
memory/3052-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3052-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3052-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3052-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3052-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3052-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4048-21-0x0000000074D50000-0x0000000075500000-memory.dmp

Filesize
7.7MB

Download
memory/4048-2-0x0000000005430000-0x00000000059D4000-memory.dmp

Filesize
5.6MB

Download
memory/4048-0-0x0000000074D5E000-0x0000000074D5F000-memory.dmp

Filesize
4KB

Download
memory/4048-3-0x0000000004E80000-0x0000000004F12000-memory.dmp

Filesize
584KB

Download
memory/4048-5-0x0000000074D50000-0x0000000075500000-memory.dmp

Filesize
7.7MB

Download
memory/4048-4-0x0000000004E10000-0x0000000004E1A000-memory.dmp

Filesize
40KB

Download
memory/4048-6-0x0000000005280000-0x00000000052A0000-memory.dmp

Filesize
128KB

Download
memory/4048-1-0x00000000003E0000-0x0000000000408000-memory.dmp

Filesize
160KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

Loading Replay Monitor...

Downloads