remcos | ec92383d5d1d5e8d12a4c14389f7ec60f1370e349fae4983910e9b6d2dd5163a

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
Executes dropped EXE 2 IoCs

Processes:

oos.exeoos.exe

pid process

1296 oos.exe
2004 oos.exe
Loads dropped DLL 2 IoCs

Processes:

cmd.exeoos.exe

pid process

740 cmd.exe
1296 oos.exe

pid	process
1296	oos.exe
2004	oos.exe

pid	process
740	cmd.exe
1296	oos.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

oos.exead3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.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-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Windows\CurrentVersion\Run\	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\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-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Windows\CurrentVersion\Run\	oos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\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:

ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exeoos.exe

description	pid	process	target process
PID 2044 set thread context of 576	2044	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 1296 set thread context of 2004	1296	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
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

oos.exe

pid process

2004 oos.exe

pid	process
2004	oos.exe

Suspicious use of WriteProcessMemory 47 IoCs

Processes:

ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exead3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 2044 wrote to memory of 576	2044	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2044 wrote to memory of 576	2044	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2044 wrote to memory of 576	2044	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2044 wrote to memory of 576	2044	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2044 wrote to memory of 576	2044	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2044 wrote to memory of 576	2044	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2044 wrote to memory of 576	2044	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2044 wrote to memory of 576	2044	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2044 wrote to memory of 576	2044	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2044 wrote to memory of 576	2044	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2044 wrote to memory of 576	2044	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2044 wrote to memory of 576	2044	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2044 wrote to memory of 576	2044	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2044 wrote to memory of 576	2044	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2044 wrote to memory of 576	2044	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 2044 wrote to memory of 576	2044	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
PID 576 wrote to memory of 676	576	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	WScript.exe
PID 576 wrote to memory of 676	576	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	WScript.exe
PID 576 wrote to memory of 676	576	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	WScript.exe
PID 576 wrote to memory of 676	576	ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe	WScript.exe
PID 676 wrote to memory of 740	676	WScript.exe	cmd.exe
PID 676 wrote to memory of 740	676	WScript.exe	cmd.exe
PID 676 wrote to memory of 740	676	WScript.exe	cmd.exe
PID 676 wrote to memory of 740	676	WScript.exe	cmd.exe
PID 740 wrote to memory of 1296	740	cmd.exe	oos.exe
PID 740 wrote to memory of 1296	740	cmd.exe	oos.exe
PID 740 wrote to memory of 1296	740	cmd.exe	oos.exe
PID 740 wrote to memory of 1296	740	cmd.exe	oos.exe
PID 740 wrote to memory of 1296	740	cmd.exe	oos.exe
PID 740 wrote to memory of 1296	740	cmd.exe	oos.exe
PID 740 wrote to memory of 1296	740	cmd.exe	oos.exe
PID 1296 wrote to memory of 2004	1296	oos.exe	oos.exe
PID 1296 wrote to memory of 2004	1296	oos.exe	oos.exe
PID 1296 wrote to memory of 2004	1296	oos.exe	oos.exe
PID 1296 wrote to memory of 2004	1296	oos.exe	oos.exe
PID 1296 wrote to memory of 2004	1296	oos.exe	oos.exe
PID 1296 wrote to memory of 2004	1296	oos.exe	oos.exe
PID 1296 wrote to memory of 2004	1296	oos.exe	oos.exe
PID 1296 wrote to memory of 2004	1296	oos.exe	oos.exe
PID 1296 wrote to memory of 2004	1296	oos.exe	oos.exe
PID 1296 wrote to memory of 2004	1296	oos.exe	oos.exe
PID 1296 wrote to memory of 2004	1296	oos.exe	oos.exe
PID 1296 wrote to memory of 2004	1296	oos.exe	oos.exe
PID 1296 wrote to memory of 2004	1296	oos.exe	oos.exe
PID 1296 wrote to memory of 2004	1296	oos.exe	oos.exe
PID 1296 wrote to memory of 2004	1296	oos.exe	oos.exe
PID 1296 wrote to memory of 2004	1296	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 use of WriteProcessMemory
PID:2044

C:\Users\Admin\AppData\Local\Temp\ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569.exe
"{path}"
2⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:576

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:676

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
4⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:740

C:\Users\Admin\AppData\Roaming\oos.exe
C:\Users\Admin\AppData\Roaming\oos.exe
5⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1296

C:\Users\Admin\AppData\Roaming\oos.exe
"{path}"
6⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
PID:2004

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

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

MD5
4feb0234834119a25b97ad3d21d782bc

SHA1
41f6f0f521c2f1ec5667b926831c95ee3f2da789

SHA256
ce40dff5e38c5d21843f6fc05b6672ca2dc8dcba50fde1b03953a6bbb475cf4c

SHA512
6d65f90c0cae374382e2765fd0e31100626ddd802f29f76d762e4e334faa7e27c4da98671e14b1eba442f42d63fafed65938df39743b3e0067baf31ccb8aa5e7

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
\Users\Admin\AppData\Roaming\oos.exe
Filesize
929KB

MD5
1eee890ebe5e8b5d03a2fae63f791141

SHA1
75b0c7cb4069b21b70794d25bd89a3d5bcac8205

SHA256
ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569

SHA512
c806dc7c1b857c6823369fb104173243faf350a6f34af92d749b93fd6aad0061d3aa1c24d2e3951341d4c8c17b1c79507d39d0d447940352ead727454aac79ab

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

MD5
1eee890ebe5e8b5d03a2fae63f791141

SHA1
75b0c7cb4069b21b70794d25bd89a3d5bcac8205

SHA256
ad3a4db849a64ea07922d63153d3381798b4450f28d8db82c95393a5f6aaa569

SHA512
c806dc7c1b857c6823369fb104173243faf350a6f34af92d749b93fd6aad0061d3aa1c24d2e3951341d4c8c17b1c79507d39d0d447940352ead727454aac79ab

Download Submit
memory/576-64-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/576-60-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/576-63-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/576-62-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/576-65-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/576-66-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/576-67-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/576-69-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/576-68-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/576-71-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/576-77-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/576-61-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1296-84-0x0000000004C50000-0x0000000004C90000-memory.dmp

Filesize
256KB

Download
memory/1296-82-0x00000000002F0000-0x00000000003DE000-memory.dmp

Filesize
952KB

Download
memory/1296-83-0x0000000004C50000-0x0000000004C90000-memory.dmp

Filesize
256KB

Download
memory/2004-107-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2004-104-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2004-122-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2004-121-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2004-94-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2004-115-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2004-98-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2004-99-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2004-101-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2004-102-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2004-103-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2004-114-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2004-105-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2004-113-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2004-110-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2044-59-0x0000000005590000-0x000000000560A000-memory.dmp

Filesize
488KB

Download
memory/2044-58-0x00000000057F0000-0x00000000058A8000-memory.dmp

Filesize
736KB

Download
memory/2044-56-0x0000000000360000-0x000000000036E000-memory.dmp

Filesize
56KB

Download
memory/2044-55-0x0000000004940000-0x0000000004980000-memory.dmp

Filesize
256KB

Download
memory/2044-57-0x0000000004940000-0x0000000004980000-memory.dmp

Filesize
256KB

Download
memory/2044-54-0x00000000008E0000-0x00000000009CE000-memory.dmp

Filesize
952KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads