remcos | 3639a796055969929b98a8a34fde77d9a0f79242ec6f012fea2dc14a98752a32

General

Target

7f93ebca40acd75da0b0a599e0eb5276.exe
Size

888KB
MD5

7f93ebca40acd75da0b0a599e0eb5276
SHA1

255df64f2dc464e5e89cd20d633605a5c02e9500
SHA256

3639a796055969929b98a8a34fde77d9a0f79242ec6f012fea2dc14a98752a32
SHA512

9956bc0e6dc29df89bcaffdc6f925709314657e0dbd4484ec66cd41f1825fc692d71cc733fe5d2d724a40073f66672bc396f461c81993324e7f731457fbc9ab5

Score

10^/10

remcos xp persistence rat

Malware Config

Extracted

Family

remcos

Botnet

XP

C2

xpremcuz300622.ddns.net:3542

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
oos.exe
delete_file
false
hide_file
true
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Remcos-MMP2I7
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
kkl
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 3 IoCs

Processes:

oos.exeoos.exeoos.exe

pid process

3308 oos.exe
3664 oos.exe
5116 oos.exe

pid	process
3308	oos.exe
3664	oos.exe
5116	oos.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

7f93ebca40acd75da0b0a599e0eb5276.exeWScript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	7f93ebca40acd75da0b0a599e0eb5276.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	WScript.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

oos.exe7f93ebca40acd75da0b0a599e0eb5276.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	oos.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run\	7f93ebca40acd75da0b0a599e0eb5276.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	7f93ebca40acd75da0b0a599e0eb5276.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	7f93ebca40acd75da0b0a599e0eb5276.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	7f93ebca40acd75da0b0a599e0eb5276.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run\	oos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	oos.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	oos.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

7f93ebca40acd75da0b0a599e0eb5276.exeoos.exe

description	pid	process	target process
PID 4624 set thread context of 4812	4624	7f93ebca40acd75da0b0a599e0eb5276.exe	7f93ebca40acd75da0b0a599e0eb5276.exe
PID 3308 set thread context of 5116	3308	oos.exe	oos.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Modifies registry class 1 IoCs

Processes:

7f93ebca40acd75da0b0a599e0eb5276.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000_Classes\Local Settings	7f93ebca40acd75da0b0a599e0eb5276.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

7f93ebca40acd75da0b0a599e0eb5276.exeoos.exe

pid process

4624 7f93ebca40acd75da0b0a599e0eb5276.exe
4624 7f93ebca40acd75da0b0a599e0eb5276.exe
3308 oos.exe
3308 oos.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

7f93ebca40acd75da0b0a599e0eb5276.exeoos.exe

description pid process

Token: SeDebugPrivilege 4624 7f93ebca40acd75da0b0a599e0eb5276.exe
Token: SeDebugPrivilege 3308 oos.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

oos.exe

pid process

5116 oos.exe

pid	process
4624	7f93ebca40acd75da0b0a599e0eb5276.exe
4624	7f93ebca40acd75da0b0a599e0eb5276.exe
3308	oos.exe
3308	oos.exe

description	pid	process
Token: SeDebugPrivilege	4624	7f93ebca40acd75da0b0a599e0eb5276.exe
Token: SeDebugPrivilege	3308	oos.exe

pid	process
5116	oos.exe

Suspicious use of WriteProcessMemory 39 IoCs

Processes:

7f93ebca40acd75da0b0a599e0eb5276.exe7f93ebca40acd75da0b0a599e0eb5276.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 4624 wrote to memory of 4888	4624	7f93ebca40acd75da0b0a599e0eb5276.exe	7f93ebca40acd75da0b0a599e0eb5276.exe
PID 4624 wrote to memory of 4888	4624	7f93ebca40acd75da0b0a599e0eb5276.exe	7f93ebca40acd75da0b0a599e0eb5276.exe
PID 4624 wrote to memory of 4888	4624	7f93ebca40acd75da0b0a599e0eb5276.exe	7f93ebca40acd75da0b0a599e0eb5276.exe
PID 4624 wrote to memory of 4812	4624	7f93ebca40acd75da0b0a599e0eb5276.exe	7f93ebca40acd75da0b0a599e0eb5276.exe
PID 4624 wrote to memory of 4812	4624	7f93ebca40acd75da0b0a599e0eb5276.exe	7f93ebca40acd75da0b0a599e0eb5276.exe
PID 4624 wrote to memory of 4812	4624	7f93ebca40acd75da0b0a599e0eb5276.exe	7f93ebca40acd75da0b0a599e0eb5276.exe
PID 4624 wrote to memory of 4812	4624	7f93ebca40acd75da0b0a599e0eb5276.exe	7f93ebca40acd75da0b0a599e0eb5276.exe
PID 4624 wrote to memory of 4812	4624	7f93ebca40acd75da0b0a599e0eb5276.exe	7f93ebca40acd75da0b0a599e0eb5276.exe
PID 4624 wrote to memory of 4812	4624	7f93ebca40acd75da0b0a599e0eb5276.exe	7f93ebca40acd75da0b0a599e0eb5276.exe
PID 4624 wrote to memory of 4812	4624	7f93ebca40acd75da0b0a599e0eb5276.exe	7f93ebca40acd75da0b0a599e0eb5276.exe
PID 4624 wrote to memory of 4812	4624	7f93ebca40acd75da0b0a599e0eb5276.exe	7f93ebca40acd75da0b0a599e0eb5276.exe
PID 4624 wrote to memory of 4812	4624	7f93ebca40acd75da0b0a599e0eb5276.exe	7f93ebca40acd75da0b0a599e0eb5276.exe
PID 4624 wrote to memory of 4812	4624	7f93ebca40acd75da0b0a599e0eb5276.exe	7f93ebca40acd75da0b0a599e0eb5276.exe
PID 4624 wrote to memory of 4812	4624	7f93ebca40acd75da0b0a599e0eb5276.exe	7f93ebca40acd75da0b0a599e0eb5276.exe
PID 4624 wrote to memory of 4812	4624	7f93ebca40acd75da0b0a599e0eb5276.exe	7f93ebca40acd75da0b0a599e0eb5276.exe
PID 4812 wrote to memory of 3532	4812	7f93ebca40acd75da0b0a599e0eb5276.exe	WScript.exe
PID 4812 wrote to memory of 3532	4812	7f93ebca40acd75da0b0a599e0eb5276.exe	WScript.exe
PID 4812 wrote to memory of 3532	4812	7f93ebca40acd75da0b0a599e0eb5276.exe	WScript.exe
PID 3532 wrote to memory of 608	3532	WScript.exe	cmd.exe
PID 3532 wrote to memory of 608	3532	WScript.exe	cmd.exe
PID 3532 wrote to memory of 608	3532	WScript.exe	cmd.exe
PID 608 wrote to memory of 3308	608	cmd.exe	oos.exe
PID 608 wrote to memory of 3308	608	cmd.exe	oos.exe
PID 608 wrote to memory of 3308	608	cmd.exe	oos.exe
PID 3308 wrote to memory of 3664	3308	oos.exe	oos.exe
PID 3308 wrote to memory of 3664	3308	oos.exe	oos.exe
PID 3308 wrote to memory of 3664	3308	oos.exe	oos.exe
PID 3308 wrote to memory of 5116	3308	oos.exe	oos.exe
PID 3308 wrote to memory of 5116	3308	oos.exe	oos.exe
PID 3308 wrote to memory of 5116	3308	oos.exe	oos.exe
PID 3308 wrote to memory of 5116	3308	oos.exe	oos.exe
PID 3308 wrote to memory of 5116	3308	oos.exe	oos.exe
PID 3308 wrote to memory of 5116	3308	oos.exe	oos.exe
PID 3308 wrote to memory of 5116	3308	oos.exe	oos.exe
PID 3308 wrote to memory of 5116	3308	oos.exe	oos.exe
PID 3308 wrote to memory of 5116	3308	oos.exe	oos.exe
PID 3308 wrote to memory of 5116	3308	oos.exe	oos.exe
PID 3308 wrote to memory of 5116	3308	oos.exe	oos.exe
PID 3308 wrote to memory of 5116	3308	oos.exe	oos.exe

C:\Users\Admin\AppData\Local\Temp\7f93ebca40acd75da0b0a599e0eb5276.exe
"C:\Users\Admin\AppData\Local\Temp\7f93ebca40acd75da0b0a599e0eb5276.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4624

C:\Users\Admin\AppData\Local\Temp\7f93ebca40acd75da0b0a599e0eb5276.exe
"C:\Users\Admin\AppData\Local\Temp\7f93ebca40acd75da0b0a599e0eb5276.exe"
2⤵
PID:4888

C:\Users\Admin\AppData\Local\Temp\7f93ebca40acd75da0b0a599e0eb5276.exe
"C:\Users\Admin\AppData\Local\Temp\7f93ebca40acd75da0b0a599e0eb5276.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4812

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3532

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
4⤵
- Suspicious use of WriteProcessMemory
PID:608

C:\Users\Admin\AppData\Roaming\oos.exe
C:\Users\Admin\AppData\Roaming\oos.exe
5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3308

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
6⤵
- Executes dropped EXE
PID:3664

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
6⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
PID:5116

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\install.vbs
Filesize
398B

MD5
a5d3440f90cbfae712166e20870eaed7

SHA1
cc1e1a2945eb2ad475234344f7527ad9e9873647

SHA256
960a570da95b8d16809cbcc18e8ca4d81e16cb666354ddc1d572daf93f291f02

SHA512
d3136a280fbb326ccc5cb5ab1214aed8ccd6baa7f3f89ef9e0b5bf391a957dab2c121640bb056e6cbda0594f83133c4dbb4e1e2f0e290b44a401cd2cf8cfd4aa

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
888KB

MD5
7f93ebca40acd75da0b0a599e0eb5276

SHA1
255df64f2dc464e5e89cd20d633605a5c02e9500

SHA256
3639a796055969929b98a8a34fde77d9a0f79242ec6f012fea2dc14a98752a32

SHA512
9956bc0e6dc29df89bcaffdc6f925709314657e0dbd4484ec66cd41f1825fc692d71cc733fe5d2d724a40073f66672bc396f461c81993324e7f731457fbc9ab5

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
888KB

MD5
7f93ebca40acd75da0b0a599e0eb5276

SHA1
255df64f2dc464e5e89cd20d633605a5c02e9500

SHA256
3639a796055969929b98a8a34fde77d9a0f79242ec6f012fea2dc14a98752a32

SHA512
9956bc0e6dc29df89bcaffdc6f925709314657e0dbd4484ec66cd41f1825fc692d71cc733fe5d2d724a40073f66672bc396f461c81993324e7f731457fbc9ab5

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
888KB

MD5
7f93ebca40acd75da0b0a599e0eb5276

SHA1
255df64f2dc464e5e89cd20d633605a5c02e9500

SHA256
3639a796055969929b98a8a34fde77d9a0f79242ec6f012fea2dc14a98752a32

SHA512
9956bc0e6dc29df89bcaffdc6f925709314657e0dbd4484ec66cd41f1825fc692d71cc733fe5d2d724a40073f66672bc396f461c81993324e7f731457fbc9ab5

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
888KB

MD5
7f93ebca40acd75da0b0a599e0eb5276

SHA1
255df64f2dc464e5e89cd20d633605a5c02e9500

SHA256
3639a796055969929b98a8a34fde77d9a0f79242ec6f012fea2dc14a98752a32

SHA512
9956bc0e6dc29df89bcaffdc6f925709314657e0dbd4484ec66cd41f1825fc692d71cc733fe5d2d724a40073f66672bc396f461c81993324e7f731457fbc9ab5

Download Submit
memory/608-143-0x0000000000000000-mapping.dmp

Download
memory/3308-144-0x0000000000000000-mapping.dmp

Download
memory/3532-140-0x0000000000000000-mapping.dmp

Download
memory/3664-147-0x0000000000000000-mapping.dmp

Download
memory/4624-133-0x0000000005740000-0x00000000057D2000-memory.dmp

Filesize
584KB

Download
memory/4624-134-0x0000000005A80000-0x0000000005B1C000-memory.dmp

Filesize
624KB

Download
memory/4624-132-0x0000000000A40000-0x0000000000B24000-memory.dmp

Filesize
912KB

Download
memory/4812-136-0x0000000000000000-mapping.dmp

Download
memory/4812-137-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4812-139-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4812-138-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4812-141-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4888-135-0x0000000000000000-mapping.dmp

Download
memory/5116-152-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/5116-149-0x0000000000000000-mapping.dmp

Download
memory/5116-153-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/5116-154-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/5116-155-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads