remcos | d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

General

Target

d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
Size

934KB
MD5

706ac294f54bfd2a28d03f1c79165f9b
SHA1

3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0
SHA256

d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e
SHA512

aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0
SSDEEP

24576:hYjlN8ydjXnTVJQU/i35XN8JxiNGIJui/+:hYjlN9jXnTQUi59+xiNA1

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 4 IoCs

Processes:

oos.exeoos.exeoos.exeoos.exe

pid process

4484 oos.exe
4408 oos.exe
2400 oos.exe
1260 oos.exe

pid	process
4484	oos.exe
4408	oos.exe
2400	oos.exe
1260	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:

d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exeWScript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.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.exed35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe

description	ioc	process
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
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\	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.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\""	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run\	oos.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exeoos.exe

description	pid	process	target process
PID 4344 set thread context of 5104	4344	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
PID 4484 set thread context of 1260	4484	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:

d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000_Classes\Local Settings	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exeoos.exe

pid	process
4344	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
4344	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
4484	oos.exe
4484	oos.exe
4484	oos.exe
4484	oos.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exeoos.exe

description	pid	process
Token: SeDebugPrivilege	4344	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
Token: SeDebugPrivilege	4484	oos.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

oos.exe

pid process

1260 oos.exe

pid	process
1260	oos.exe

Suspicious use of WriteProcessMemory 42 IoCs

Processes:

d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exed35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 4344 wrote to memory of 3580	4344	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
PID 4344 wrote to memory of 3580	4344	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
PID 4344 wrote to memory of 3580	4344	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
PID 4344 wrote to memory of 5104	4344	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
PID 4344 wrote to memory of 5104	4344	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
PID 4344 wrote to memory of 5104	4344	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
PID 4344 wrote to memory of 5104	4344	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
PID 4344 wrote to memory of 5104	4344	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
PID 4344 wrote to memory of 5104	4344	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
PID 4344 wrote to memory of 5104	4344	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
PID 4344 wrote to memory of 5104	4344	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
PID 4344 wrote to memory of 5104	4344	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
PID 4344 wrote to memory of 5104	4344	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
PID 4344 wrote to memory of 5104	4344	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
PID 4344 wrote to memory of 5104	4344	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
PID 5104 wrote to memory of 3504	5104	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe	WScript.exe
PID 5104 wrote to memory of 3504	5104	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe	WScript.exe
PID 5104 wrote to memory of 3504	5104	d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe	WScript.exe
PID 3504 wrote to memory of 680	3504	WScript.exe	cmd.exe
PID 3504 wrote to memory of 680	3504	WScript.exe	cmd.exe
PID 3504 wrote to memory of 680	3504	WScript.exe	cmd.exe
PID 680 wrote to memory of 4484	680	cmd.exe	oos.exe
PID 680 wrote to memory of 4484	680	cmd.exe	oos.exe
PID 680 wrote to memory of 4484	680	cmd.exe	oos.exe
PID 4484 wrote to memory of 4408	4484	oos.exe	oos.exe
PID 4484 wrote to memory of 4408	4484	oos.exe	oos.exe
PID 4484 wrote to memory of 4408	4484	oos.exe	oos.exe
PID 4484 wrote to memory of 2400	4484	oos.exe	oos.exe
PID 4484 wrote to memory of 2400	4484	oos.exe	oos.exe
PID 4484 wrote to memory of 2400	4484	oos.exe	oos.exe
PID 4484 wrote to memory of 1260	4484	oos.exe	oos.exe
PID 4484 wrote to memory of 1260	4484	oos.exe	oos.exe
PID 4484 wrote to memory of 1260	4484	oos.exe	oos.exe
PID 4484 wrote to memory of 1260	4484	oos.exe	oos.exe
PID 4484 wrote to memory of 1260	4484	oos.exe	oos.exe
PID 4484 wrote to memory of 1260	4484	oos.exe	oos.exe
PID 4484 wrote to memory of 1260	4484	oos.exe	oos.exe
PID 4484 wrote to memory of 1260	4484	oos.exe	oos.exe
PID 4484 wrote to memory of 1260	4484	oos.exe	oos.exe
PID 4484 wrote to memory of 1260	4484	oos.exe	oos.exe
PID 4484 wrote to memory of 1260	4484	oos.exe	oos.exe
PID 4484 wrote to memory of 1260	4484	oos.exe	oos.exe

C:\Users\Admin\AppData\Local\Temp\d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
"C:\Users\Admin\AppData\Local\Temp\d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4344

C:\Users\Admin\AppData\Local\Temp\d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
"C:\Users\Admin\AppData\Local\Temp\d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe"
2⤵
PID:3580

C:\Users\Admin\AppData\Local\Temp\d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe
"C:\Users\Admin\AppData\Local\Temp\d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:5104

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:3504

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
4⤵
- Suspicious use of WriteProcessMemory
PID:680

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:4484

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
6⤵
- Executes dropped EXE
PID:4408

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
6⤵
- Executes dropped EXE
PID:2400

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:1260

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
934KB

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
934KB

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
934KB

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
934KB

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
934KB

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

Download Submit
memory/680-146-0x0000000000000000-mapping.dmp

Download
memory/1260-160-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1260-159-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1260-158-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1260-157-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1260-154-0x0000000000000000-mapping.dmp

Download
memory/2400-152-0x0000000000000000-mapping.dmp

Download
memory/3504-143-0x0000000000000000-mapping.dmp

Download
memory/3580-137-0x0000000000000000-mapping.dmp

Download
memory/4344-136-0x0000000008A10000-0x0000000008AAC000-memory.dmp

Filesize
624KB

Download
memory/4344-135-0x0000000004F20000-0x0000000004F2A000-memory.dmp

Filesize
40KB

Download
memory/4344-132-0x00000000002F0000-0x00000000003E0000-memory.dmp

Filesize
960KB

Download
memory/4344-134-0x0000000004D80000-0x0000000004E12000-memory.dmp

Filesize
584KB

Download
memory/4344-133-0x0000000005330000-0x00000000058D4000-memory.dmp

Filesize
5.6MB

Download
memory/4408-150-0x0000000000000000-mapping.dmp

Download
memory/4484-147-0x0000000000000000-mapping.dmp

Download
memory/5104-139-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/5104-138-0x0000000000000000-mapping.dmp

Download
memory/5104-144-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/5104-142-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/5104-141-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/5104-140-0x0000000000400000-0x000000000047E000-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