remcos | b47bab6180af2d5a6d5317d311fbd94704c8504cc9bfe33014be4256fdce5531

General

Target

a11a0d0058f12a5ce73448b24653fa20N.exe
Size

139KB
MD5

a11a0d0058f12a5ce73448b24653fa20
SHA1

ea55a5ac974cabf8d4d3a4ac27e28ccd00571e53
SHA256

b47bab6180af2d5a6d5317d311fbd94704c8504cc9bfe33014be4256fdce5531
SHA512

f3c465e26281d6d33713f2f9a734785e24a8ffbaff43b9a1b566311cd065f68fa7ad2c76ecd6801605eff75b3f0efb8a6157818b8fb755cf8d52ee49714b1e80
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIH4:xP6/M+WLckOBhVmI1

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
Executes dropped EXE 2 IoCs

Processes:

wn2ra4ohzdr.exewn2ra4ohzdr.exe

pid process

2464 wn2ra4ohzdr.exe
2900 wn2ra4ohzdr.exe
Loads dropped DLL 1 IoCs

Processes:

a11a0d0058f12a5ce73448b24653fa20N.exe

pid process

1232 a11a0d0058f12a5ce73448b24653fa20N.exe

pid	process
2464	wn2ra4ohzdr.exe
2900	wn2ra4ohzdr.exe

pid	process
1232	a11a0d0058f12a5ce73448b24653fa20N.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

a11a0d0058f12a5ce73448b24653fa20N.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	a11a0d0058f12a5ce73448b24653fa20N.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

wn2ra4ohzdr.exe

description pid process target process

PID 2464 set thread context of 2900 2464 wn2ra4ohzdr.exe wn2ra4ohzdr.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

description	pid	process	target process
PID 2464 set thread context of 2900	2464	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe

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

Processes:

a11a0d0058f12a5ce73448b24653fa20N.exewn2ra4ohzdr.exewn2ra4ohzdr.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a11a0d0058f12a5ce73448b24653fa20N.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

Processes:

wn2ra4ohzdr.exe

pid process

2900 wn2ra4ohzdr.exe

pid	process
2900	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

a11a0d0058f12a5ce73448b24653fa20N.exewn2ra4ohzdr.exe

description	pid	process	target process
PID 1232 wrote to memory of 2464	1232	a11a0d0058f12a5ce73448b24653fa20N.exe	wn2ra4ohzdr.exe
PID 1232 wrote to memory of 2464	1232	a11a0d0058f12a5ce73448b24653fa20N.exe	wn2ra4ohzdr.exe
PID 1232 wrote to memory of 2464	1232	a11a0d0058f12a5ce73448b24653fa20N.exe	wn2ra4ohzdr.exe
PID 1232 wrote to memory of 2464	1232	a11a0d0058f12a5ce73448b24653fa20N.exe	wn2ra4ohzdr.exe
PID 2464 wrote to memory of 2900	2464	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 2464 wrote to memory of 2900	2464	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 2464 wrote to memory of 2900	2464	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 2464 wrote to memory of 2900	2464	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 2464 wrote to memory of 2900	2464	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 2464 wrote to memory of 2900	2464	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 2464 wrote to memory of 2900	2464	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 2464 wrote to memory of 2900	2464	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 2464 wrote to memory of 2900	2464	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 2464 wrote to memory of 2900	2464	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe

C:\Users\Admin\AppData\Local\Temp\a11a0d0058f12a5ce73448b24653fa20N.exe
"C:\Users\Admin\AppData\Local\Temp\a11a0d0058f12a5ce73448b24653fa20N.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1232

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:2464

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:2900

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

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Downloads

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

Filesize
139KB

MD5
0767a443ff95708fcfb37e5ea7a2fd8b

SHA1
d605cb82f8cb6728eb5e5a3fa476547748bbd093

SHA256
b637610a9d174ced044273f5b5b9364aa299f7f3c99d434e4c9be3c6bb26b2d1

SHA512
d1ab9b217dbe7848926c9f4b07efc353a9488c5d830318833d40a1b67b06513b1fcd662eddd8c6efd8b94320b16090edeb9821a532ecf4b85cd9685d5a8aa2cb

Download Submit
memory/1232-0-0x000000007407E000-0x000000007407F000-memory.dmp

Filesize
4KB

Download
memory/1232-1-0x00000000010C0000-0x00000000010E8000-memory.dmp

Filesize
160KB

Download
memory/1232-2-0x0000000074070000-0x000000007475E000-memory.dmp

Filesize
6.9MB

Download
memory/1232-3-0x00000000004B0000-0x00000000004D0000-memory.dmp

Filesize
128KB

Download
memory/1232-12-0x0000000074070000-0x000000007475E000-memory.dmp

Filesize
6.9MB

Download
memory/2464-15-0x0000000074070000-0x000000007475E000-memory.dmp

Filesize
6.9MB

Download
memory/2464-14-0x0000000074070000-0x000000007475E000-memory.dmp

Filesize
6.9MB

Download
memory/2464-13-0x00000000010F0000-0x0000000001118000-memory.dmp

Filesize
160KB

Download
memory/2464-33-0x0000000074070000-0x000000007475E000-memory.dmp

Filesize
6.9MB

Download
memory/2900-16-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2900-25-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2900-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2900-22-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2900-20-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2900-18-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2900-17-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2900-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2900-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads