remcos | b8c5e2c8477706f3f54e152443718dcec270889002289aa1730eabc5ba3f312f

Analysis

max time kernel
145s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
22/03/2025, 06:09

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General

Target

275ed71ebe32729141c2916b8abcca8763d60d2a4af82de387b9979a37495ada.exe
Size

135KB
MD5

955370c2069f2a6d1e61acf033cea200
SHA1

d6b5e253980b7744802e5fe3c1d1b2b9ce0572b3
SHA256

275ed71ebe32729141c2916b8abcca8763d60d2a4af82de387b9979a37495ada
SHA512

373ceafa1a982eff2f0bf93c728f7e1fab4df393e600aa5bcb4939eae8ad7959713cda9fa22a379a507431d6c2ea9bbccb4f254fdac434ec4f0e3c7aa9b9387a
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjK6:xPd4n/M+WLcilrpgGH/GwY87mVmIXt0Z

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-1-5-21-814918696-1585701690-3140955116-1000\Control Panel\International\Geo\Nation	275ed71ebe32729141c2916b8abcca8763d60d2a4af82de387b9979a37495ada.exe

Executes dropped EXE 2 IoCs

pid	Process
4548	wn2ra4ohzdr.exe
1004	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-1-5-21-814918696-1585701690-3140955116-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	275ed71ebe32729141c2916b8abcca8763d60d2a4af82de387b9979a37495ada.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4548 set thread context of 1004	4548	wn2ra4ohzdr.exe	87

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	wn2ra4ohzdr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	275ed71ebe32729141c2916b8abcca8763d60d2a4af82de387b9979a37495ada.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wn2ra4ohzdr.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1004	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1976 wrote to memory of 4548	1976	275ed71ebe32729141c2916b8abcca8763d60d2a4af82de387b9979a37495ada.exe	86
PID 1976 wrote to memory of 4548	1976	275ed71ebe32729141c2916b8abcca8763d60d2a4af82de387b9979a37495ada.exe	86
PID 1976 wrote to memory of 4548	1976	275ed71ebe32729141c2916b8abcca8763d60d2a4af82de387b9979a37495ada.exe	86
PID 4548 wrote to memory of 1004	4548	wn2ra4ohzdr.exe	87
PID 4548 wrote to memory of 1004	4548	wn2ra4ohzdr.exe	87
PID 4548 wrote to memory of 1004	4548	wn2ra4ohzdr.exe	87
PID 4548 wrote to memory of 1004	4548	wn2ra4ohzdr.exe	87
PID 4548 wrote to memory of 1004	4548	wn2ra4ohzdr.exe	87
PID 4548 wrote to memory of 1004	4548	wn2ra4ohzdr.exe	87
PID 4548 wrote to memory of 1004	4548	wn2ra4ohzdr.exe	87
PID 4548 wrote to memory of 1004	4548	wn2ra4ohzdr.exe	87
PID 4548 wrote to memory of 1004	4548	wn2ra4ohzdr.exe	87

C:\Users\Admin\AppData\Local\Temp\275ed71ebe32729141c2916b8abcca8763d60d2a4af82de387b9979a37495ada.exe
"C:\Users\Admin\AppData\Local\Temp\275ed71ebe32729141c2916b8abcca8763d60d2a4af82de387b9979a37495ada.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1976
- 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:4548
- - 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:1004

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

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\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe

Filesize
135KB

MD5
7dad3c3b6c659410f3df30cb8f1ae3ae

SHA1
d7d3914b77de96a1d39e2c58b152d8e251b8b5b6

SHA256
7e5dcf6b00ebe28a7a9b131b5095987c2dd52211e444797e617d3bd2cd33599c

SHA512
934080b80740e266964c1dd308d98427bfb3836070651130589b13fc2f629564a00e62394bcd92c1cb99e93103eaed7b49cbef83d9830cc1050b5519a4a8d4b2

Download Submit
memory/1004-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1004-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1004-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1004-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1004-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1004-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1976-5-0x0000000004DD0000-0x0000000004DDA000-memory.dmp

Filesize
40KB

Download
memory/1976-20-0x0000000074A6E000-0x0000000074A6F000-memory.dmp

Filesize
4KB

Download
memory/1976-22-0x0000000074A60000-0x0000000075210000-memory.dmp

Filesize
7.7MB

Download
memory/1976-6-0x0000000004F90000-0x0000000004FB0000-memory.dmp

Filesize
128KB

Download
memory/1976-0-0x0000000074A6E000-0x0000000074A6F000-memory.dmp

Filesize
4KB

Download
memory/1976-4-0x0000000074A60000-0x0000000075210000-memory.dmp

Filesize
7.7MB

Download
memory/1976-3-0x0000000004D10000-0x0000000004DA2000-memory.dmp

Filesize
584KB

Download
memory/1976-2-0x00000000052C0000-0x0000000005864000-memory.dmp

Filesize
5.6MB

Download
memory/1976-1-0x0000000000450000-0x0000000000478000-memory.dmp

Filesize
160KB

Download
memory/4548-21-0x0000000074A60000-0x0000000075210000-memory.dmp

Filesize
7.7MB

Download
memory/4548-23-0x0000000074A60000-0x0000000075210000-memory.dmp

Filesize
7.7MB

Download
memory/4548-34-0x0000000074A60000-0x0000000075210000-memory.dmp

Filesize
7.7MB

Download
memory/4548-38-0x0000000074A60000-0x0000000075210000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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