remcos | e5d28ec84e4b5f023e3f386cf7e0776850b67e2bad1299413885f3fdd757f58c

Analysis

max time kernel
148s
max time network
156s
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, 06:18

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

e67e28bf496e7f9625bf94a126253aac.exe
Size

143KB
MD5

e67e28bf496e7f9625bf94a126253aac
SHA1

0fa0895e7332dcd5671e5debb90931bbb19653af
SHA256

4549878374bcf9d4b5b872e0423eed14635eb8c9317c9d3da1bff246c6034aae
SHA512

5a6bcf68b213b843ae26a783fa08cb20bca4f8b5ec84fb1e8eff20034da57072cae71950fdbeff99bb7f573d8752c2ba083052f39bf3a7730682e7cf255f32d3
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIHVSsr:xP6/M+WLckOBhVmIYBr

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-1-5-21-805952410-2104024357-1716932545-1000\Control Panel\International\Geo\Nation	e67e28bf496e7f9625bf94a126253aac.exe

Executes dropped EXE 2 IoCs

pid	Process
4204	wn2ra4ohzdr.exe
1108	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-1-5-21-805952410-2104024357-1716932545-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	e67e28bf496e7f9625bf94a126253aac.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4204 set thread context of 1108	4204	wn2ra4ohzdr.exe	98

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	e67e28bf496e7f9625bf94a126253aac.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
1108	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1956 wrote to memory of 4204	1956	e67e28bf496e7f9625bf94a126253aac.exe	95
PID 1956 wrote to memory of 4204	1956	e67e28bf496e7f9625bf94a126253aac.exe	95
PID 1956 wrote to memory of 4204	1956	e67e28bf496e7f9625bf94a126253aac.exe	95
PID 4204 wrote to memory of 1108	4204	wn2ra4ohzdr.exe	98
PID 4204 wrote to memory of 1108	4204	wn2ra4ohzdr.exe	98
PID 4204 wrote to memory of 1108	4204	wn2ra4ohzdr.exe	98
PID 4204 wrote to memory of 1108	4204	wn2ra4ohzdr.exe	98
PID 4204 wrote to memory of 1108	4204	wn2ra4ohzdr.exe	98
PID 4204 wrote to memory of 1108	4204	wn2ra4ohzdr.exe	98
PID 4204 wrote to memory of 1108	4204	wn2ra4ohzdr.exe	98
PID 4204 wrote to memory of 1108	4204	wn2ra4ohzdr.exe	98
PID 4204 wrote to memory of 1108	4204	wn2ra4ohzdr.exe	98

C:\Users\Admin\AppData\Local\Temp\e67e28bf496e7f9625bf94a126253aac.exe
"C:\Users\Admin\AppData\Local\Temp\e67e28bf496e7f9625bf94a126253aac.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1956
- 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:4204
- - 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:1108

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
143KB

MD5
868900c8f396c42b651db72b9b007917

SHA1
cc2136ae12ddec7e188a2527340052d12e216aad

SHA256
dd3ef422af1e0bf9ae624648a9f1fc28276b581d9efbe9e3e35c514347f57472

SHA512
3146d718fde19e9cf7ac0c36101dfe29c7adef93e561068ef500c96fc5bd1d3312dbb528ea633f5337c12e1b1a62b209ef884becf98f5dab5ab8786177462cfa

Download Submit
memory/1108-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1108-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1108-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1108-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1108-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1108-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1956-5-0x00000000751A0000-0x0000000075950000-memory.dmp

Filesize
7.7MB

Download
memory/1956-16-0x00000000751AE000-0x00000000751AF000-memory.dmp

Filesize
4KB

Download
memory/1956-21-0x00000000751A0000-0x0000000075950000-memory.dmp

Filesize
7.7MB

Download
memory/1956-6-0x0000000005230000-0x0000000005250000-memory.dmp

Filesize
128KB

Download
memory/1956-0-0x00000000751AE000-0x00000000751AF000-memory.dmp

Filesize
4KB

Download
memory/1956-4-0x00000000050B0000-0x00000000050BA000-memory.dmp

Filesize
40KB

Download
memory/1956-3-0x0000000005120000-0x00000000051B2000-memory.dmp

Filesize
584KB

Download
memory/1956-2-0x00000000056D0000-0x0000000005C74000-memory.dmp

Filesize
5.6MB

Download
memory/1956-1-0x00000000006A0000-0x00000000006C8000-memory.dmp

Filesize
160KB

Download
memory/4204-22-0x00000000751A0000-0x0000000075950000-memory.dmp

Filesize
7.7MB

Download
memory/4204-23-0x00000000751A0000-0x0000000075950000-memory.dmp

Filesize
7.7MB

Download
memory/4204-34-0x00000000751A0000-0x0000000075950000-memory.dmp

Filesize
7.7MB

Download
memory/4204-36-0x00000000751A0000-0x0000000075950000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads