remcos | 805c5709be7589073f6c90410ba05d8d4240ba487fe7c8febf2de9ba214a489e

Analysis

max time kernel
149s
max time network
152s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
22/03/2025, 06:14

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General

Target

94e2ada20e21670b71abcc87c81ea0f6.exe
Size

135KB
MD5

94e2ada20e21670b71abcc87c81ea0f6
SHA1

3bf8abc4c4c08026f172057d24e97c6cc5dd1091
SHA256

91a0511445ab6427f6fb0de1529a1104486dea9c0afd5646e7972122566f3814
SHA512

8b60cd355cc70d9ff332350b574fc8c43c4e8172f91065ec250b546e64116296ca982a1c1e7c11fde1624169b76bd0fa05617e53d2b8ce5167b0326bf56b8d16
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXarM2:xP6/M+WLckOBhVmIqrM2

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
2624	wn2ra4ohzdr.exe
2792	wn2ra4ohzdr.exe

Loads dropped DLL 1 IoCs

pid	Process
2060	94e2ada20e21670b71abcc87c81ea0f6.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-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	94e2ada20e21670b71abcc87c81ea0f6.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2624 set thread context of 2792	2624	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	94e2ada20e21670b71abcc87c81ea0f6.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
2792	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2060 wrote to memory of 2624	2060	94e2ada20e21670b71abcc87c81ea0f6.exe	31
PID 2060 wrote to memory of 2624	2060	94e2ada20e21670b71abcc87c81ea0f6.exe	31
PID 2060 wrote to memory of 2624	2060	94e2ada20e21670b71abcc87c81ea0f6.exe	31
PID 2060 wrote to memory of 2624	2060	94e2ada20e21670b71abcc87c81ea0f6.exe	31
PID 2624 wrote to memory of 2792	2624	wn2ra4ohzdr.exe	32
PID 2624 wrote to memory of 2792	2624	wn2ra4ohzdr.exe	32
PID 2624 wrote to memory of 2792	2624	wn2ra4ohzdr.exe	32
PID 2624 wrote to memory of 2792	2624	wn2ra4ohzdr.exe	32
PID 2624 wrote to memory of 2792	2624	wn2ra4ohzdr.exe	32
PID 2624 wrote to memory of 2792	2624	wn2ra4ohzdr.exe	32
PID 2624 wrote to memory of 2792	2624	wn2ra4ohzdr.exe	32
PID 2624 wrote to memory of 2792	2624	wn2ra4ohzdr.exe	32
PID 2624 wrote to memory of 2792	2624	wn2ra4ohzdr.exe	32
PID 2624 wrote to memory of 2792	2624	wn2ra4ohzdr.exe	32

C:\Users\Admin\AppData\Local\Temp\94e2ada20e21670b71abcc87c81ea0f6.exe
"C:\Users\Admin\AppData\Local\Temp\94e2ada20e21670b71abcc87c81ea0f6.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2060
- 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:2624
- - 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:2792

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
4848096505249a39e5397d450e48dd34

SHA1
2b4a293b956f9cf14b479c8e50bf765b28c9d673

SHA256
1106fe95d2cd164cc3fc81d303223a172b274631c3ea0f4914d9977f8dd3aa1c

SHA512
1bda7b96afaea52c525794d418ce44c322df295bbf412afcb0ab2ee7d475c5c3f2fe28f4c3883ac849afdc740903822b821fc0e656828ca0a0fd5430a0e905c6

Download Submit
memory/2060-1-0x0000000001240000-0x0000000001268000-memory.dmp

Filesize
160KB

Download
memory/2060-2-0x0000000074BC0000-0x00000000752AE000-memory.dmp

Filesize
6.9MB

Download
memory/2060-3-0x0000000000430000-0x0000000000450000-memory.dmp

Filesize
128KB

Download
memory/2060-12-0x0000000074BC0000-0x00000000752AE000-memory.dmp

Filesize
6.9MB

Download
memory/2060-0-0x0000000074BCE000-0x0000000074BCF000-memory.dmp

Filesize
4KB

Download
memory/2624-34-0x0000000074BC0000-0x00000000752AE000-memory.dmp

Filesize
6.9MB

Download
memory/2624-13-0x0000000074BC0000-0x00000000752AE000-memory.dmp

Filesize
6.9MB

Download
memory/2624-14-0x0000000001380000-0x00000000013A8000-memory.dmp

Filesize
160KB

Download
memory/2624-15-0x0000000074BC0000-0x00000000752AE000-memory.dmp

Filesize
6.9MB

Download
memory/2624-35-0x0000000074BC0000-0x00000000752AE000-memory.dmp

Filesize
6.9MB

Download
memory/2792-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2792-21-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2792-19-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2792-18-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2792-16-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2792-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2792-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2792-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2792-26-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads