remcos | 20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684

General

Target

20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684N.exe
Size

138KB
MD5

a72a99b91f5e47c3a6f40ef983343680
SHA1

a8cfc9541ea81f16d67ebd7900c8020b563d04e7
SHA256

20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684
SHA512

9d9d71e2f00d615c428ea409998ece26a7ba0dd8cc36a3ffa254ba775fcab03f6cca05d1967c9204a9468d1f48c556e34e5cccbb82cc8f1d4e31c592c41f9937
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjK6:xPd4n/M+WLcilrpgGH/GwY87mVmIXK

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

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

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-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684N.exe

Executes dropped EXE 2 IoCs

pid	Process
3156	wn2ra4ohzdr.exe
4472	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-1-5-21-2718105630-359604950-2820636825-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3156 set thread context of 4472	3156	wn2ra4ohzdr.exe	89

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	wn2ra4ohzdr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684N.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4472	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 384 wrote to memory of 3156	384	20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684N.exe	86
PID 384 wrote to memory of 3156	384	20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684N.exe	86
PID 384 wrote to memory of 3156	384	20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684N.exe	86
PID 3156 wrote to memory of 4472	3156	wn2ra4ohzdr.exe	89
PID 3156 wrote to memory of 4472	3156	wn2ra4ohzdr.exe	89
PID 3156 wrote to memory of 4472	3156	wn2ra4ohzdr.exe	89
PID 3156 wrote to memory of 4472	3156	wn2ra4ohzdr.exe	89
PID 3156 wrote to memory of 4472	3156	wn2ra4ohzdr.exe	89
PID 3156 wrote to memory of 4472	3156	wn2ra4ohzdr.exe	89
PID 3156 wrote to memory of 4472	3156	wn2ra4ohzdr.exe	89
PID 3156 wrote to memory of 4472	3156	wn2ra4ohzdr.exe	89
PID 3156 wrote to memory of 4472	3156	wn2ra4ohzdr.exe	89

C:\Users\Admin\AppData\Local\Temp\20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684N.exe
"C:\Users\Admin\AppData\Local\Temp\20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:384
- 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:3156
- - 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:4472

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
138KB

MD5
e94c721c1dd54cbf29ac0a895b237487

SHA1
270cadcd0b7ed42e41a4f4908a50c77720982590

SHA256
9699b97f8f9111d1e4fdb8b1018d722017c8a1cafbe84616f115b38dae35b604

SHA512
1a86c31fe0949e242a3a15d9ef1d27dcf878d35c92bde07a7c37844ad036d97a26970717d3f36af6e68acec2a50444eddd601da1a14a9d8d9c06d2a6a97f0ae5

Download Submit
memory/384-20-0x0000000074990000-0x0000000075140000-memory.dmp

Filesize
7.7MB

Download
memory/384-3-0x0000000004D40000-0x0000000004DD2000-memory.dmp

Filesize
584KB

Download
memory/384-4-0x0000000074990000-0x0000000075140000-memory.dmp

Filesize
7.7MB

Download
memory/384-2-0x0000000005250000-0x00000000057F4000-memory.dmp

Filesize
5.6MB

Download
memory/384-5-0x0000000004D10000-0x0000000004D1A000-memory.dmp

Filesize
40KB

Download
memory/384-6-0x0000000004F30000-0x0000000004F50000-memory.dmp

Filesize
128KB

Download
memory/384-1-0x00000000002F0000-0x0000000000318000-memory.dmp

Filesize
160KB

Download
memory/384-0-0x000000007499E000-0x000000007499F000-memory.dmp

Filesize
4KB

Download
memory/3156-35-0x0000000074990000-0x0000000075140000-memory.dmp

Filesize
7.7MB

Download
memory/3156-22-0x0000000074990000-0x0000000075140000-memory.dmp

Filesize
7.7MB

Download
memory/3156-33-0x0000000074990000-0x0000000075140000-memory.dmp

Filesize
7.7MB

Download
memory/3156-21-0x0000000074990000-0x0000000075140000-memory.dmp

Filesize
7.7MB

Download
memory/4472-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4472-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4472-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4472-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4472-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4472-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads