remcos | 4bcbb8983fe7425976c5a1789deff73fb138e80981f5ebfef1f835bcc6757760

Analysis

max time kernel
147s
max time network
150s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
22/03/2025, 06:18

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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 2 IoCs

pid	Process
2556	wn2ra4ohzdr.exe
2876	wn2ra4ohzdr.exe

Loads dropped DLL 1 IoCs

pid	Process
2100	f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.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-1-5-21-1163522206-1469769407-485553996-1000\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 2556 set thread context of 2876	2556	wn2ra4ohzdr.exe	32

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	f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.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
2876	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2100 wrote to memory of 2556	2100	f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe	30
PID 2100 wrote to memory of 2556	2100	f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe	30
PID 2100 wrote to memory of 2556	2100	f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe	30
PID 2100 wrote to memory of 2556	2100	f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe	30
PID 2556 wrote to memory of 2876	2556	wn2ra4ohzdr.exe	32
PID 2556 wrote to memory of 2876	2556	wn2ra4ohzdr.exe	32
PID 2556 wrote to memory of 2876	2556	wn2ra4ohzdr.exe	32
PID 2556 wrote to memory of 2876	2556	wn2ra4ohzdr.exe	32
PID 2556 wrote to memory of 2876	2556	wn2ra4ohzdr.exe	32
PID 2556 wrote to memory of 2876	2556	wn2ra4ohzdr.exe	32
PID 2556 wrote to memory of 2876	2556	wn2ra4ohzdr.exe	32
PID 2556 wrote to memory of 2876	2556	wn2ra4ohzdr.exe	32
PID 2556 wrote to memory of 2876	2556	wn2ra4ohzdr.exe	32
PID 2556 wrote to memory of 2876	2556	wn2ra4ohzdr.exe	32

C:\Users\Admin\AppData\Local\Temp\f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe
"C:\Users\Admin\AppData\Local\Temp\f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2100
- 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:2556
- - 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:2876

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

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

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

Filesize
135KB

MD5
712dae7c2efff6cf111574be40aee318

SHA1
a743efc7b49a5447296ce7a20dd75d94edd2711c

SHA256
08e068ad5e860007c4294094743e93d987ac7d2fae96a8eec8d226c2f1fcdd45

SHA512
e13236346623c49d14e7f1b0f3ecb294e77956b9993bb97d8b4ef49b1cff84f954f3a204f85ccbc6ad76663dc99950e08ecafeff292c93bb70d2854f342a00e2

Download Submit
memory/2100-1-0x0000000000D70000-0x0000000000D98000-memory.dmp

Filesize
160KB

Download
memory/2100-2-0x0000000074A40000-0x000000007512E000-memory.dmp

Filesize
6.9MB

Download
memory/2100-3-0x0000000000430000-0x0000000000450000-memory.dmp

Filesize
128KB

Download
memory/2100-12-0x0000000074A40000-0x000000007512E000-memory.dmp

Filesize
6.9MB

Download
memory/2100-0-0x0000000074A4E000-0x0000000074A4F000-memory.dmp

Filesize
4KB

Download
memory/2556-38-0x0000000074A40000-0x000000007512E000-memory.dmp

Filesize
6.9MB

Download
memory/2556-14-0x0000000074A40000-0x000000007512E000-memory.dmp

Filesize
6.9MB

Download
memory/2556-13-0x0000000000F00000-0x0000000000F28000-memory.dmp

Filesize
160KB

Download
memory/2556-15-0x0000000074A40000-0x000000007512E000-memory.dmp

Filesize
6.9MB

Download
memory/2556-39-0x0000000074A40000-0x000000007512E000-memory.dmp

Filesize
6.9MB

Download
memory/2876-29-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2876-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2876-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2876-20-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2876-18-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2876-33-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2876-34-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2876-37-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2876-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2876-16-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2876-42-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads