remcos | 0f85a9bf69c4316be205cb2ddef6366b7e36481b9849b5a6dede994474a1f134

General

Target

ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
Size

929KB
MD5

1eee890ebe5e8b5d03a2fae63f791141
SHA1

75b0c7cb4069b21b70794d25bd89a3d5bcac8205
SHA256

ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569
SHA512

c806dc7c1b857c6823369fb104173243faf350a6f34af92d749b93fd6aad0061d3aa1c24d2e3951341d4c8c17b1c79507d39d0d447940352ead727454aac79ab
SSDEEP

24576:eTsIBMNjnNNOhAe/S0uEpWBmlWDXBpYe0ZqaWcioykjEziYQp7dX:3glWDR/0UciRA

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

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:

ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exeWScript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 2 IoCs

Processes:

oos.exeoos.exe

pid process

764 oos.exe
2796 oos.exe

pid	process
764	oos.exe
2796	oos.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exeoos.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Windows\CurrentVersion\Run\	oos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\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-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Windows\CurrentVersion\Run\	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exeoos.exe

description	pid	process	target process
PID 2004 set thread context of 3412	2004	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 764 set thread context of 2796	764	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:

ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000_Classes\Local Settings	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe

pid	process
2004	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
2004	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe

description pid process

Token: SeDebugPrivilege 2004 ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

oos.exe

pid process

2796 oos.exe

description	pid	process
Token: SeDebugPrivilege	2004	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe

pid	process
2796	oos.exe

Suspicious use of WriteProcessMemory 36 IoCs

Processes:

ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exead3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 2004 wrote to memory of 264	2004	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2004 wrote to memory of 264	2004	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2004 wrote to memory of 264	2004	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2004 wrote to memory of 3412	2004	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2004 wrote to memory of 3412	2004	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2004 wrote to memory of 3412	2004	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2004 wrote to memory of 3412	2004	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2004 wrote to memory of 3412	2004	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2004 wrote to memory of 3412	2004	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2004 wrote to memory of 3412	2004	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2004 wrote to memory of 3412	2004	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2004 wrote to memory of 3412	2004	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2004 wrote to memory of 3412	2004	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2004 wrote to memory of 3412	2004	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2004 wrote to memory of 3412	2004	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 3412 wrote to memory of 1244	3412	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	WScript.exe
PID 3412 wrote to memory of 1244	3412	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	WScript.exe
PID 3412 wrote to memory of 1244	3412	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	WScript.exe
PID 1244 wrote to memory of 1496	1244	WScript.exe	cmd.exe
PID 1244 wrote to memory of 1496	1244	WScript.exe	cmd.exe
PID 1244 wrote to memory of 1496	1244	WScript.exe	cmd.exe
PID 1496 wrote to memory of 764	1496	cmd.exe	oos.exe
PID 1496 wrote to memory of 764	1496	cmd.exe	oos.exe
PID 1496 wrote to memory of 764	1496	cmd.exe	oos.exe
PID 764 wrote to memory of 2796	764	oos.exe	oos.exe
PID 764 wrote to memory of 2796	764	oos.exe	oos.exe
PID 764 wrote to memory of 2796	764	oos.exe	oos.exe
PID 764 wrote to memory of 2796	764	oos.exe	oos.exe
PID 764 wrote to memory of 2796	764	oos.exe	oos.exe
PID 764 wrote to memory of 2796	764	oos.exe	oos.exe
PID 764 wrote to memory of 2796	764	oos.exe	oos.exe
PID 764 wrote to memory of 2796	764	oos.exe	oos.exe
PID 764 wrote to memory of 2796	764	oos.exe	oos.exe
PID 764 wrote to memory of 2796	764	oos.exe	oos.exe
PID 764 wrote to memory of 2796	764	oos.exe	oos.exe
PID 764 wrote to memory of 2796	764	oos.exe	oos.exe

C:\Users\Admin\AppData\Local\Temp\ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
"C:\Users\Admin\AppData\Local\Temp\ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2004

C:\Users\Admin\AppData\Local\Temp\ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
"{path}"
2⤵
PID:264

C:\Users\Admin\AppData\Local\Temp\ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
"{path}"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3412

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:1244

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
4⤵
- Suspicious use of WriteProcessMemory
PID:1496

C:\Users\Admin\AppData\Roaming\oos.exe
C:\Users\Admin\AppData\Roaming\oos.exe
5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:764

C:\Users\Admin\AppData\Roaming\oos.exe
"{path}"
6⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
PID:2796

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

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Downloads

C:\ProgramData\remcos\logs.dat
Filesize
144B

MD5
767ef2eb08c418d08ad815b2a3735993

SHA1
3d45bd98ffc20ecd025d3847c31982dd480ea88c

SHA256
1f7a47a70bd1d7de4e538d4c55cb5ff4838401497b92aad9ce3653596f31d279

SHA512
107fb6d66fd7c23b420a2ed2bdda61d41bfd656b66cef7e3ed98121e54f547d95228e4055fc314d8de7ac1950c7939cd67688362f0e65180f3d18a702873dfff

Download Submit
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
929KB

MD5
1eee890ebe5e8b5d03a2fae63f791141

SHA1
75b0c7cb4069b21b70794d25bd89a3d5bcac8205

SHA256
ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569

SHA512
c806dc7c1b857c6823369fb104173243faf350a6f34af92d749b93fd6aad0061d3aa1c24d2e3951341d4c8c17b1c79507d39d0d447940352ead727454aac79ab

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
929KB

MD5
1eee890ebe5e8b5d03a2fae63f791141

SHA1
75b0c7cb4069b21b70794d25bd89a3d5bcac8205

SHA256
ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569

SHA512
c806dc7c1b857c6823369fb104173243faf350a6f34af92d749b93fd6aad0061d3aa1c24d2e3951341d4c8c17b1c79507d39d0d447940352ead727454aac79ab

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
929KB

MD5
1eee890ebe5e8b5d03a2fae63f791141

SHA1
75b0c7cb4069b21b70794d25bd89a3d5bcac8205

SHA256
ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569

SHA512
c806dc7c1b857c6823369fb104173243faf350a6f34af92d749b93fd6aad0061d3aa1c24d2e3951341d4c8c17b1c79507d39d0d447940352ead727454aac79ab

Download Submit
memory/764-155-0x0000000004E30000-0x0000000004E40000-memory.dmp

Filesize
64KB

Download
memory/764-156-0x0000000004E30000-0x0000000004E40000-memory.dmp

Filesize
64KB

Download
memory/2004-136-0x00000000057C0000-0x000000000585C000-memory.dmp

Filesize
624KB

Download
memory/2004-133-0x0000000000C50000-0x0000000000D3E000-memory.dmp

Filesize
952KB

Download
memory/2004-139-0x0000000005900000-0x0000000005910000-memory.dmp

Filesize
64KB

Download
memory/2004-138-0x00000000056F0000-0x00000000056FA000-memory.dmp

Filesize
40KB

Download
memory/2004-137-0x0000000005900000-0x0000000005910000-memory.dmp

Filesize
64KB

Download
memory/2004-135-0x0000000005720000-0x00000000057B2000-memory.dmp

Filesize
584KB

Download
memory/2004-134-0x0000000005C30000-0x00000000061D4000-memory.dmp

Filesize
5.6MB

Download
memory/2796-167-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2796-166-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2796-194-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2796-193-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2796-159-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2796-161-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2796-162-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2796-164-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2796-165-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2796-185-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2796-178-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2796-168-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2796-174-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2796-177-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3412-142-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3412-140-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3412-150-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3412-143-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3412-147-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads