remcos | 4bcbb8983fe7425976c5a1789deff73fb138e80981f5ebfef1f835bcc6757760

Resubmissions

14/04/2025, 07:51

250414-jp1kfssjz9 10

14/04/2025, 07:46

250414-jl9nyssjt9 10

08/04/2025, 15:58

250408-tevasswl18 10

08/04/2025, 14:19

250408-rm2nqsvqw2 10

Analysis

max time kernel
144s
max time network
151s
platform
windows10-ltsc_2021_x64
resource
win10ltsc2021-20250314-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20250314-enlocale:en-usos:windows10-ltsc_2021-x64system
submitted
14/04/2025, 07:51

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General

Target

f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe
Size

135KB
MD5

5269f6855d30bdd88ba0d88453c8e722
SHA1

d87ffc99e105315bebfef48296f6b0e6e87ae5cf
SHA256

f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b
SHA512

7ab21f5e7d7fd6bb2149b80582bc50711941bce8128c26d48710c8e9a60d3eff153ab3f39696451b1a946da052b3dd2a4de444b9bb9e6bdb884bcbe03f654819
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjKE:xPd4n/M+WLcilrpgGH/GwY87mVmIXU

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-1-5-21-73851796-4078923053-1419757224-1000\Control Panel\International\Geo\Nation	f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe

Executes dropped EXE 4 IoCs

pid	Process
3964	wn2ra4ohzdr.exe
4884	wn2ra4ohzdr.exe
6140	wn2ra4ohzdr.exe
5076	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-1-5-21-73851796-4078923053-1419757224-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3964 set thread context of 6140	3964	wn2ra4ohzdr.exe	94
PID 4884 set thread context of 5076	4884	wn2ra4ohzdr.exe	95

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	f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wn2ra4ohzdr.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
6140	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 3172 wrote to memory of 3964	3172	cmd.exe	90
PID 3172 wrote to memory of 3964	3172	cmd.exe	90
PID 3172 wrote to memory of 3964	3172	cmd.exe	90
PID 3680 wrote to memory of 4884	3680	f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe	92
PID 3680 wrote to memory of 4884	3680	f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe	92
PID 3680 wrote to memory of 4884	3680	f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe	92
PID 3964 wrote to memory of 6140	3964	wn2ra4ohzdr.exe	94
PID 3964 wrote to memory of 6140	3964	wn2ra4ohzdr.exe	94
PID 3964 wrote to memory of 6140	3964	wn2ra4ohzdr.exe	94
PID 3964 wrote to memory of 6140	3964	wn2ra4ohzdr.exe	94
PID 3964 wrote to memory of 6140	3964	wn2ra4ohzdr.exe	94
PID 3964 wrote to memory of 6140	3964	wn2ra4ohzdr.exe	94
PID 3964 wrote to memory of 6140	3964	wn2ra4ohzdr.exe	94
PID 3964 wrote to memory of 6140	3964	wn2ra4ohzdr.exe	94
PID 3964 wrote to memory of 6140	3964	wn2ra4ohzdr.exe	94
PID 4884 wrote to memory of 5076	4884	wn2ra4ohzdr.exe	95
PID 4884 wrote to memory of 5076	4884	wn2ra4ohzdr.exe	95
PID 4884 wrote to memory of 5076	4884	wn2ra4ohzdr.exe	95
PID 4884 wrote to memory of 5076	4884	wn2ra4ohzdr.exe	95
PID 4884 wrote to memory of 5076	4884	wn2ra4ohzdr.exe	95
PID 4884 wrote to memory of 5076	4884	wn2ra4ohzdr.exe	95
PID 4884 wrote to memory of 5076	4884	wn2ra4ohzdr.exe	95
PID 4884 wrote to memory of 5076	4884	wn2ra4ohzdr.exe	95
PID 4884 wrote to memory of 5076	4884	wn2ra4ohzdr.exe	95

C:\Users\Admin\AppData\Local\Temp\f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe
"C:\Users\Admin\AppData\Local\Temp\f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3680
- 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:4884
- - C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
    "C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"
    3⤵
    - Executes dropped EXE
    PID:5076

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
1⤵
- Suspicious use of WriteProcessMemory
PID:3172
- 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:3964
- - 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:6140

Network

MITRE ATT&CK Enterprise v16

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\Local\Microsoft\CLR_v4.0_32\UsageLogs\wn2ra4ohzdr.exe.log

Filesize
1KB

MD5
d4416b6bdae28d02f58ee6b2e5d7bbb7

SHA1
27d5896a0bc9b990a408e54a7d2a5a64d71e9e93

SHA256
ac6e8331d48bd24244597a326a3973f4d7b3328ecfec4e765f92c64967041689

SHA512
d86a7900137ec23e2e330a61843d0bc67f3f657a701ae3a8380ed324dcbeab3d26ece8264dfff2c2670e0b2c90fb6715d9959ae08f2ed4f574e45dc84d4e0e6c

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

Filesize
135KB

MD5
72056a00aaed83c2ff56701670543af8

SHA1
d2d389893c201edfdec60334401523c829f93982

SHA256
44ecb14f4ff4aac8627f8d9dd0a371e4f376d2de583674c0c6d4807b2fbdb512

SHA512
495a6855090f73a0d88e2927d85912197d78482aa70b0eb392ac6fe664846a7677a14fa50a83782715e78cac5710a3742133c2e4400a97c928a048c007d3d10f

Download Submit
memory/3680-6-0x0000000004E20000-0x0000000004E40000-memory.dmp

Filesize
128KB

Download
memory/3680-3-0x0000000004C90000-0x0000000004D22000-memory.dmp

Filesize
584KB

Download
memory/3680-4-0x0000000074F30000-0x00000000756E1000-memory.dmp

Filesize
7.7MB

Download
memory/3680-5-0x0000000004D60000-0x0000000004D6A000-memory.dmp

Filesize
40KB

Download
memory/3680-2-0x0000000005300000-0x00000000058A6000-memory.dmp

Filesize
5.6MB

Download
memory/3680-14-0x0000000074F3E000-0x0000000074F3F000-memory.dmp

Filesize
4KB

Download
memory/3680-17-0x0000000074F30000-0x00000000756E1000-memory.dmp

Filesize
7.7MB

Download
memory/3680-0-0x0000000074F3E000-0x0000000074F3F000-memory.dmp

Filesize
4KB

Download
memory/3680-1-0x00000000002A0000-0x00000000002C8000-memory.dmp

Filesize
160KB

Download
memory/3964-36-0x0000000074F30000-0x00000000756E1000-memory.dmp

Filesize
7.7MB

Download
memory/3964-12-0x0000000074F30000-0x00000000756E1000-memory.dmp

Filesize
7.7MB

Download
memory/3964-13-0x0000000074F30000-0x00000000756E1000-memory.dmp

Filesize
7.7MB

Download
memory/3964-39-0x0000000074F30000-0x00000000756E1000-memory.dmp

Filesize
7.7MB

Download
memory/4884-18-0x0000000074F30000-0x00000000756E1000-memory.dmp

Filesize
7.7MB

Download
memory/4884-37-0x0000000074F30000-0x00000000756E1000-memory.dmp

Filesize
7.7MB

Download
memory/4884-43-0x0000000074F30000-0x00000000756E1000-memory.dmp

Filesize
7.7MB

Download
memory/6140-21-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/6140-19-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/6140-20-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/6140-22-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/6140-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/6140-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads