remcos | 4bcbb8983fe7425976c5a1789deff73fb138e80981f5ebfef1f835bcc6757760

Resubmissions

08/04/2025, 14:11

250408-rhjmcsvp15 10

22/03/2025, 06:18

250322-g2ywaay1fy 10

Analysis

max time kernel
144s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
08/04/2025, 14:11

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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-1-5-21-3342763580-2723508992-2885672917-1000\Control Panel\International\Geo\Nation	f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe

Executes dropped EXE 3 IoCs

pid	Process
4844	wn2ra4ohzdr.exe
5004	wn2ra4ohzdr.exe
5764	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-1-5-21-3342763580-2723508992-2885672917-1000\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 5004 set thread context of 5764	5004	wn2ra4ohzdr.exe	100

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	wn2ra4ohzdr.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	f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5764	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 3328 wrote to memory of 4844	3328	cmd.exe	95
PID 3328 wrote to memory of 4844	3328	cmd.exe	95
PID 3328 wrote to memory of 4844	3328	cmd.exe	95
PID 5192 wrote to memory of 5004	5192	f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe	96
PID 5192 wrote to memory of 5004	5192	f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe	96
PID 5192 wrote to memory of 5004	5192	f812ad48d0a6d53611389e30fd8ae9f80a245fe3360b52dc833f6bf7b7b7859b.exe	96
PID 4844 wrote to memory of 5580	4844	wn2ra4ohzdr.exe	99
PID 4844 wrote to memory of 5580	4844	wn2ra4ohzdr.exe	99
PID 4844 wrote to memory of 5580	4844	wn2ra4ohzdr.exe	99
PID 5004 wrote to memory of 5764	5004	wn2ra4ohzdr.exe	100
PID 5004 wrote to memory of 5764	5004	wn2ra4ohzdr.exe	100
PID 5004 wrote to memory of 5764	5004	wn2ra4ohzdr.exe	100
PID 5004 wrote to memory of 5764	5004	wn2ra4ohzdr.exe	100
PID 5004 wrote to memory of 5764	5004	wn2ra4ohzdr.exe	100
PID 5004 wrote to memory of 5764	5004	wn2ra4ohzdr.exe	100
PID 5004 wrote to memory of 5764	5004	wn2ra4ohzdr.exe	100
PID 5004 wrote to memory of 5764	5004	wn2ra4ohzdr.exe	100
PID 5004 wrote to memory of 5764	5004	wn2ra4ohzdr.exe	100

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:5192
- 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:5004
- - 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:5764

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:3328
- 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:4844
- - C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
    "C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"
    3⤵
    PID:5580

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
7ebe314bf617dc3e48b995a6c352740c

SHA1
538f643b7b30f9231a3035c448607f767527a870

SHA256
48178f884b8a4dd96e330b210b0530667d9473a7629fc6b4ad12b614bf438ee8

SHA512
0ba9d8f4244c15285e254d27b4bff7c49344ff845c48bc0bf0d8563072fab4d6f7a6abe6b6742e8375a08e9a3b3e5d5dc4937ab428dbe2dd8e62892fda04507e

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

Filesize
135KB

MD5
a235b27171a092650d6f478125fc733a

SHA1
773a8bcad6c624ebd1aafe15896bf3252ace6da0

SHA256
931721c43104d4e41b20fc49f316bbf850190cc91a72f20d7928cfa4be790a8a

SHA512
d65180e4c93d9ab0366b25b5a27e9d56431351e8e22bf2989d793e53e50aa2ddb0aebd020941cbecb07ea8ce0746c24fd30948303beb9b3b183570a227ea5b88

Download Submit
memory/4844-13-0x0000000075380000-0x0000000075B30000-memory.dmp

Filesize
7.7MB

Download
memory/4844-32-0x0000000075380000-0x0000000075B30000-memory.dmp

Filesize
7.7MB

Download
memory/4844-29-0x0000000075380000-0x0000000075B30000-memory.dmp

Filesize
7.7MB

Download
memory/4844-12-0x0000000075380000-0x0000000075B30000-memory.dmp

Filesize
7.7MB

Download
memory/5004-34-0x0000000075380000-0x0000000075B30000-memory.dmp

Filesize
7.7MB

Download
memory/5004-30-0x0000000075380000-0x0000000075B30000-memory.dmp

Filesize
7.7MB

Download
memory/5004-18-0x0000000075380000-0x0000000075B30000-memory.dmp

Filesize
7.7MB

Download
memory/5192-6-0x0000000004F30000-0x0000000004F50000-memory.dmp

Filesize
128KB

Download
memory/5192-5-0x0000000075380000-0x0000000075B30000-memory.dmp

Filesize
7.7MB

Download
memory/5192-17-0x0000000075380000-0x0000000075B30000-memory.dmp

Filesize
7.7MB

Download
memory/5192-0-0x000000007538E000-0x000000007538F000-memory.dmp

Filesize
4KB

Download
memory/5192-14-0x000000007538E000-0x000000007538F000-memory.dmp

Filesize
4KB

Download
memory/5192-1-0x0000000000260000-0x0000000000288000-memory.dmp

Filesize
160KB

Download
memory/5192-2-0x00000000051A0000-0x0000000005744000-memory.dmp

Filesize
5.6MB

Download
memory/5192-3-0x0000000004C90000-0x0000000004D22000-memory.dmp

Filesize
584KB

Download
memory/5192-4-0x0000000004C80000-0x0000000004C8A000-memory.dmp

Filesize
40KB

Download
memory/5764-19-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5764-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5764-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5764-20-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5764-21-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5764-22-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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