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
145s
max time network
103s
platform
windows11-21h2_x64
resource
win11-20250411-en
resource tags

arch:x64arch:x86image:win11-20250411-enlocale:en-usos:windows11-21h2-x64system
submitted
14/04/2025, 07:46

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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

Executes dropped EXE 3 IoCs

pid	Process
4048	wn2ra4ohzdr.exe
4928	wn2ra4ohzdr.exe
3332	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-1-5-21-2316063146-1984817004-4437738-1000\Software\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4928 set thread context of 3332	4928	wn2ra4ohzdr.exe	84

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
3332	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 5720 wrote to memory of 4048	5720	cmd.exe	81
PID 5720 wrote to memory of 4048	5720	cmd.exe	81
PID 5720 wrote to memory of 4048	5720	cmd.exe	81
PID 5360 wrote to memory of 4928	5360	f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe	82
PID 5360 wrote to memory of 4928	5360	f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe	82
PID 5360 wrote to memory of 4928	5360	f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe	82
PID 4048 wrote to memory of 5016	4048	wn2ra4ohzdr.exe	83
PID 4048 wrote to memory of 5016	4048	wn2ra4ohzdr.exe	83
PID 4048 wrote to memory of 5016	4048	wn2ra4ohzdr.exe	83
PID 4928 wrote to memory of 3332	4928	wn2ra4ohzdr.exe	84
PID 4928 wrote to memory of 3332	4928	wn2ra4ohzdr.exe	84
PID 4928 wrote to memory of 3332	4928	wn2ra4ohzdr.exe	84
PID 4928 wrote to memory of 3332	4928	wn2ra4ohzdr.exe	84
PID 4928 wrote to memory of 3332	4928	wn2ra4ohzdr.exe	84
PID 4928 wrote to memory of 3332	4928	wn2ra4ohzdr.exe	84
PID 4928 wrote to memory of 3332	4928	wn2ra4ohzdr.exe	84
PID 4928 wrote to memory of 3332	4928	wn2ra4ohzdr.exe	84
PID 4928 wrote to memory of 3332	4928	wn2ra4ohzdr.exe	84

C:\Users\Admin\AppData\Local\Temp\f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe
"C:\Users\Admin\AppData\Local\Temp\f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe"
1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5360
- 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:4928
- - 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:3332

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:5720
- C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
  C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
  2⤵
  - Executes dropped EXE
  - 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"
    3⤵
    PID:5016

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

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
ac45cc773216001c355992d869450b47

SHA1
1f19c3839b521e1bf1ec7928f32f45234f38ea40

SHA256
c9c03abe98c496376975747c9b617f5f6e1b50aec09aa8be31aa24e81254901f

SHA512
3d73620a59089bc05d60ae07f0811ddacd1661599eca096cd9927813f86dc9cebac1de221691373601c743250694de43e408a9e607e813fb28260b1509f84574

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

Filesize
135KB

MD5
5a707febb5642cf38d2bc05fefdfc064

SHA1
b0977fe3dbe4db536e35d8932cdc1da967e9578a

SHA256
8c8e227a24173f6224c11cc9ae695c4b478eb8166c9967ffe90ac385b5866011

SHA512
9bb1f688d2f26c0e0a6c3744266823db032964210ae699c8bb1106ab71caaaf2512eb45dfaaf23ca45276b0ba7fee9977fb9b8ea0d0ffcae997323b2de05b893

Download Submit
memory/3332-20-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3332-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3332-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3332-18-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3332-19-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3332-21-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4048-30-0x00000000747B0000-0x0000000074F61000-memory.dmp

Filesize
7.7MB

Download
memory/4048-28-0x00000000747B0000-0x0000000074F61000-memory.dmp

Filesize
7.7MB

Download
memory/4048-12-0x00000000747B0000-0x0000000074F61000-memory.dmp

Filesize
7.7MB

Download
memory/4048-13-0x00000000747B0000-0x0000000074F61000-memory.dmp

Filesize
7.7MB

Download
memory/5360-5-0x00000000747B0000-0x0000000074F61000-memory.dmp

Filesize
7.7MB

Download
memory/5360-17-0x00000000747B0000-0x0000000074F61000-memory.dmp

Filesize
7.7MB

Download
memory/5360-14-0x00000000747BE000-0x00000000747BF000-memory.dmp

Filesize
4KB

Download
memory/5360-6-0x0000000004FD0000-0x0000000004FF0000-memory.dmp

Filesize
128KB

Download
memory/5360-0-0x00000000747BE000-0x00000000747BF000-memory.dmp

Filesize
4KB

Download
memory/5360-4-0x0000000004CD0000-0x0000000004CDA000-memory.dmp

Filesize
40KB

Download
memory/5360-3-0x0000000004B30000-0x0000000004BC2000-memory.dmp

Filesize
584KB

Download
memory/5360-2-0x0000000005030000-0x00000000055D6000-memory.dmp

Filesize
5.6MB

Download
memory/5360-1-0x0000000000060000-0x0000000000088000-memory.dmp

Filesize
160KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads