remcos | 02685371fedd6882df6bb6c55923098a25dd500b474d2c5162e9bb541dd78869

General

Target

02685371fedd6882df6bb6c55923098a25dd500b474d2c5162e9bb541dd78869N.exe
Size

140KB
MD5

6dc84ad7ef1ac736530211cc881fd2a0
SHA1

5778b7fbeab9b188c22c6975e723ec5e67a69411
SHA256

02685371fedd6882df6bb6c55923098a25dd500b474d2c5162e9bb541dd78869
SHA512

c4a769014f46856e9846690bd86753ef1ab74bef02ac1513db5f229bab8b6809020bc0d9ca8abef1d90349b55d295667058ce4261b00bb015e4dadca9d9be6fa
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIHVST:xP6/M+WLckOBhVmIYq

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
Remcos family
remcos

Executes dropped EXE 2 IoCs

pid	Process
2868	wn2ra4ohzdr.exe
3044	wn2ra4ohzdr.exe

Loads dropped DLL 1 IoCs

pid	Process
2716	02685371fedd6882df6bb6c55923098a25dd500b474d2c5162e9bb541dd78869N.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-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	02685371fedd6882df6bb6c55923098a25dd500b474d2c5162e9bb541dd78869N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2868 set thread context of 3044	2868	wn2ra4ohzdr.exe	31

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	02685371fedd6882df6bb6c55923098a25dd500b474d2c5162e9bb541dd78869N.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
3044	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2716 wrote to memory of 2868	2716	02685371fedd6882df6bb6c55923098a25dd500b474d2c5162e9bb541dd78869N.exe	30
PID 2716 wrote to memory of 2868	2716	02685371fedd6882df6bb6c55923098a25dd500b474d2c5162e9bb541dd78869N.exe	30
PID 2716 wrote to memory of 2868	2716	02685371fedd6882df6bb6c55923098a25dd500b474d2c5162e9bb541dd78869N.exe	30
PID 2716 wrote to memory of 2868	2716	02685371fedd6882df6bb6c55923098a25dd500b474d2c5162e9bb541dd78869N.exe	30
PID 2868 wrote to memory of 3044	2868	wn2ra4ohzdr.exe	31
PID 2868 wrote to memory of 3044	2868	wn2ra4ohzdr.exe	31
PID 2868 wrote to memory of 3044	2868	wn2ra4ohzdr.exe	31
PID 2868 wrote to memory of 3044	2868	wn2ra4ohzdr.exe	31
PID 2868 wrote to memory of 3044	2868	wn2ra4ohzdr.exe	31
PID 2868 wrote to memory of 3044	2868	wn2ra4ohzdr.exe	31
PID 2868 wrote to memory of 3044	2868	wn2ra4ohzdr.exe	31
PID 2868 wrote to memory of 3044	2868	wn2ra4ohzdr.exe	31
PID 2868 wrote to memory of 3044	2868	wn2ra4ohzdr.exe	31
PID 2868 wrote to memory of 3044	2868	wn2ra4ohzdr.exe	31

C:\Users\Admin\AppData\Local\Temp\02685371fedd6882df6bb6c55923098a25dd500b474d2c5162e9bb541dd78869N.exe
"C:\Users\Admin\AppData\Local\Temp\02685371fedd6882df6bb6c55923098a25dd500b474d2c5162e9bb541dd78869N.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2716
- 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:2868
- - 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:3044

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

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
140KB

MD5
0123c8c4fc249d1c5ef47b7c5ddfb1a3

SHA1
2bded7aeaebc0584576f2f8ac1dc2937f2779f62

SHA256
25708d843f215aa411550bc98d697cf2aaf5e4b9fa5a6e35e95d211e5eebdd41

SHA512
b6bb9932ea432e08481c08feecad2b189d63a39d5bb58373e84bf6e7ccd175ff072efeca6f2e0a366f7cbcebf88d8303132f25311884b11a69b8841257da5127

Download Submit
memory/2716-1-0x00000000010F0000-0x0000000001118000-memory.dmp

Filesize
160KB

Download
memory/2716-2-0x0000000074A00000-0x00000000750EE000-memory.dmp

Filesize
6.9MB

Download
memory/2716-3-0x0000000000A30000-0x0000000000A50000-memory.dmp

Filesize
128KB

Download
memory/2716-12-0x0000000074A0E000-0x0000000074A0F000-memory.dmp

Filesize
4KB

Download
memory/2716-15-0x0000000074A00000-0x00000000750EE000-memory.dmp

Filesize
6.9MB

Download
memory/2716-0-0x0000000074A0E000-0x0000000074A0F000-memory.dmp

Filesize
4KB

Download
memory/2868-34-0x0000000074A00000-0x00000000750EE000-memory.dmp

Filesize
6.9MB

Download
memory/2868-14-0x0000000000200000-0x0000000000228000-memory.dmp

Filesize
160KB

Download
memory/2868-13-0x0000000074A00000-0x00000000750EE000-memory.dmp

Filesize
6.9MB

Download
memory/2868-16-0x0000000074A00000-0x00000000750EE000-memory.dmp

Filesize
6.9MB

Download
memory/2868-35-0x0000000074A00000-0x00000000750EE000-memory.dmp

Filesize
6.9MB

Download
memory/3044-19-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3044-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3044-21-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3044-18-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3044-17-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3044-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3044-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3044-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3044-26-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads