remcos | aff3e08b50336ce6a1cfe39c45d32d918dc6f190662aef666addb193f44d47a8

Analysis

max time kernel
149s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
22/03/2025, 06:13

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General

Target

760a200139494a0bec4f29f831cde04c.exe
Size

136KB
MD5

760a200139494a0bec4f29f831cde04c
SHA1

1981019ac5677bc5499c11e8c50bd098974afb1f
SHA256

60bd5a161f7e5f3a1ac6538b981822bb8f17293ebefb350b3d62d180d79c4045
SHA512

363d6ccb8ad40e6d8f7a02c9d92e9ea273d0fffef8f488ad6339f6359bf4ffe0904d9b1abcd9a5fda5b27cd438c74bf34b653593f3abd1e68b55a0eee307e7cc
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjKV:xPd4n/M+WLcilrpgGH/GwY87mVmIXl

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

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
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-1-5-21-3218366390-1258052702-4267193707-1000\Control Panel\International\Geo\Nation	760a200139494a0bec4f29f831cde04c.exe

Executes dropped EXE 2 IoCs

pid	Process
892	wn2ra4ohzdr.exe
4148	wn2ra4ohzdr.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3218366390-1258052702-4267193707-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	760a200139494a0bec4f29f831cde04c.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 892 set thread context of 4148	892	wn2ra4ohzdr.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	760a200139494a0bec4f29f831cde04c.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

pid	Process
4148	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1712 wrote to memory of 892	1712	760a200139494a0bec4f29f831cde04c.exe	94
PID 1712 wrote to memory of 892	1712	760a200139494a0bec4f29f831cde04c.exe	94
PID 1712 wrote to memory of 892	1712	760a200139494a0bec4f29f831cde04c.exe	94
PID 892 wrote to memory of 4148	892	wn2ra4ohzdr.exe	97
PID 892 wrote to memory of 4148	892	wn2ra4ohzdr.exe	97
PID 892 wrote to memory of 4148	892	wn2ra4ohzdr.exe	97
PID 892 wrote to memory of 4148	892	wn2ra4ohzdr.exe	97
PID 892 wrote to memory of 4148	892	wn2ra4ohzdr.exe	97
PID 892 wrote to memory of 4148	892	wn2ra4ohzdr.exe	97
PID 892 wrote to memory of 4148	892	wn2ra4ohzdr.exe	97
PID 892 wrote to memory of 4148	892	wn2ra4ohzdr.exe	97
PID 892 wrote to memory of 4148	892	wn2ra4ohzdr.exe	97

C:\Users\Admin\AppData\Local\Temp\760a200139494a0bec4f29f831cde04c.exe
"C:\Users\Admin\AppData\Local\Temp\760a200139494a0bec4f29f831cde04c.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1712
- 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:892
- - 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:4148

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe

Filesize
136KB

MD5
9a3b7cc27aab700c8c732d3a23628c73

SHA1
9a2507a03dd46f42960f733071ee942bfa5a3988

SHA256
30e80c8a14470157c26f854c2d8f41d159b307877c267f078f6834067de9948b

SHA512
d7042c18916e66a09b828475cb44d331a0aa8aec6f7e8c6279237f1c4aab4271889e585e0e00ce3eee6e6c3f1d597f949d4c41dca37b83d90a521cabe999b1e0

Download Submit
memory/892-38-0x0000000074C00000-0x00000000753B0000-memory.dmp

Filesize
7.7MB

Download
memory/892-34-0x0000000074C00000-0x00000000753B0000-memory.dmp

Filesize
7.7MB

Download
memory/892-23-0x0000000074C00000-0x00000000753B0000-memory.dmp

Filesize
7.7MB

Download
memory/892-21-0x0000000074C00000-0x00000000753B0000-memory.dmp

Filesize
7.7MB

Download
memory/1712-5-0x0000000005140000-0x000000000514A000-memory.dmp

Filesize
40KB

Download
memory/1712-2-0x0000000005760000-0x0000000005D04000-memory.dmp

Filesize
5.6MB

Download
memory/1712-0-0x0000000074C0E000-0x0000000074C0F000-memory.dmp

Filesize
4KB

Download
memory/1712-20-0x0000000074C0E000-0x0000000074C0F000-memory.dmp

Filesize
4KB

Download
memory/1712-4-0x0000000074C00000-0x00000000753B0000-memory.dmp

Filesize
7.7MB

Download
memory/1712-3-0x00000000051B0000-0x0000000005242000-memory.dmp

Filesize
584KB

Download
memory/1712-22-0x0000000074C00000-0x00000000753B0000-memory.dmp

Filesize
7.7MB

Download
memory/1712-6-0x00000000053B0000-0x00000000053D0000-memory.dmp

Filesize
128KB

Download
memory/1712-1-0x0000000000730000-0x0000000000758000-memory.dmp

Filesize
160KB

Download
memory/4148-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4148-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4148-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4148-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4148-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4148-32-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads