remcos | 4fb5476bfc11cb3da1feffa767cc7abb70040bd0b11c0e26a7e4d2bdc2d5e049

General

Target

XLA.exe
Size

936KB
MD5

c44491911d5cfcc1dc31ac019c2714aa
SHA1

635e1be851baee85fb17cb2781bc6d9ee6a94f8b
SHA256

4fb5476bfc11cb3da1feffa767cc7abb70040bd0b11c0e26a7e4d2bdc2d5e049
SHA512

e4649b1878060833939f6762df5a95275f4b5c4b7108eab2100140a2a5fbd39374d8f9e177a9182423c74d246808e68228f6dd6b6cf109894a255f8ce4505c15
SSDEEP

12288:/44mF6XP6Cau9Jez6Qf2ItKcTvNwjc5ul/1hfeq85A1DisBCos5yrO6okfY+uEjQ:/Ba6fsWlawcWrZYoZfBBj

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

1064 oos.exe
868 oos.exe
1180 oos.exe
768 oos.exe
Loads dropped DLL 2 IoCs

Processes:

cmd.exe

pid process

1780 cmd.exe
1780 cmd.exe

pid	process
1064	oos.exe
868	oos.exe
1180	oos.exe
768	oos.exe

pid	process
1780	cmd.exe
1780	cmd.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

XLA.exeoos.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	XLA.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	XLA.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	XLA.exe
Key created	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\Run\	oos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\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-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\Run\	XLA.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

XLA.exeoos.exe

description pid process target process

PID 544 set thread context of 1956 544 XLA.exe XLA.exe
PID 1064 set thread context of 768 1064 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 behavior: EnumeratesProcesses 2 IoCs

Processes:

oos.exe

pid process

1064 oos.exe
1064 oos.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

oos.exe

description pid process

Token: SeDebugPrivilege 1064 oos.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

oos.exe

pid process

768 oos.exe

description	pid	process	target process
PID 544 set thread context of 1956	544	XLA.exe	XLA.exe
PID 1064 set thread context of 768	1064	oos.exe	oos.exe

pid	process
1064	oos.exe
1064	oos.exe

description	pid	process
Token: SeDebugPrivilege	1064	oos.exe

pid	process
768	oos.exe

Suspicious use of WriteProcessMemory 46 IoCs

Processes:

XLA.exeXLA.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 544 wrote to memory of 1956	544	XLA.exe	XLA.exe
PID 544 wrote to memory of 1956	544	XLA.exe	XLA.exe
PID 544 wrote to memory of 1956	544	XLA.exe	XLA.exe
PID 544 wrote to memory of 1956	544	XLA.exe	XLA.exe
PID 544 wrote to memory of 1956	544	XLA.exe	XLA.exe
PID 544 wrote to memory of 1956	544	XLA.exe	XLA.exe
PID 544 wrote to memory of 1956	544	XLA.exe	XLA.exe
PID 544 wrote to memory of 1956	544	XLA.exe	XLA.exe
PID 544 wrote to memory of 1956	544	XLA.exe	XLA.exe
PID 544 wrote to memory of 1956	544	XLA.exe	XLA.exe
PID 544 wrote to memory of 1956	544	XLA.exe	XLA.exe
PID 544 wrote to memory of 1956	544	XLA.exe	XLA.exe
PID 544 wrote to memory of 1956	544	XLA.exe	XLA.exe
PID 1956 wrote to memory of 916	1956	XLA.exe	WScript.exe
PID 1956 wrote to memory of 916	1956	XLA.exe	WScript.exe
PID 1956 wrote to memory of 916	1956	XLA.exe	WScript.exe
PID 1956 wrote to memory of 916	1956	XLA.exe	WScript.exe
PID 916 wrote to memory of 1780	916	WScript.exe	cmd.exe
PID 916 wrote to memory of 1780	916	WScript.exe	cmd.exe
PID 916 wrote to memory of 1780	916	WScript.exe	cmd.exe
PID 916 wrote to memory of 1780	916	WScript.exe	cmd.exe
PID 1780 wrote to memory of 1064	1780	cmd.exe	oos.exe
PID 1780 wrote to memory of 1064	1780	cmd.exe	oos.exe
PID 1780 wrote to memory of 1064	1780	cmd.exe	oos.exe
PID 1780 wrote to memory of 1064	1780	cmd.exe	oos.exe
PID 1064 wrote to memory of 868	1064	oos.exe	oos.exe
PID 1064 wrote to memory of 868	1064	oos.exe	oos.exe
PID 1064 wrote to memory of 868	1064	oos.exe	oos.exe
PID 1064 wrote to memory of 868	1064	oos.exe	oos.exe
PID 1064 wrote to memory of 1180	1064	oos.exe	oos.exe
PID 1064 wrote to memory of 1180	1064	oos.exe	oos.exe
PID 1064 wrote to memory of 1180	1064	oos.exe	oos.exe
PID 1064 wrote to memory of 1180	1064	oos.exe	oos.exe
PID 1064 wrote to memory of 768	1064	oos.exe	oos.exe
PID 1064 wrote to memory of 768	1064	oos.exe	oos.exe
PID 1064 wrote to memory of 768	1064	oos.exe	oos.exe
PID 1064 wrote to memory of 768	1064	oos.exe	oos.exe
PID 1064 wrote to memory of 768	1064	oos.exe	oos.exe
PID 1064 wrote to memory of 768	1064	oos.exe	oos.exe
PID 1064 wrote to memory of 768	1064	oos.exe	oos.exe
PID 1064 wrote to memory of 768	1064	oos.exe	oos.exe
PID 1064 wrote to memory of 768	1064	oos.exe	oos.exe
PID 1064 wrote to memory of 768	1064	oos.exe	oos.exe
PID 1064 wrote to memory of 768	1064	oos.exe	oos.exe
PID 1064 wrote to memory of 768	1064	oos.exe	oos.exe
PID 1064 wrote to memory of 768	1064	oos.exe	oos.exe

C:\Users\Admin\AppData\Local\Temp\XLA.exe
"C:\Users\Admin\AppData\Local\Temp\XLA.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:544

C:\Users\Admin\AppData\Local\Temp\XLA.exe
"C:\Users\Admin\AppData\Local\Temp\XLA.exe"
2⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1956

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:916

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:1780

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:1064

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
6⤵
- Executes dropped EXE
PID:868

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
6⤵
- Executes dropped EXE
PID:1180

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:768

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:\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
936KB

MD5
c44491911d5cfcc1dc31ac019c2714aa

SHA1
635e1be851baee85fb17cb2781bc6d9ee6a94f8b

SHA256
4fb5476bfc11cb3da1feffa767cc7abb70040bd0b11c0e26a7e4d2bdc2d5e049

SHA512
e4649b1878060833939f6762df5a95275f4b5c4b7108eab2100140a2a5fbd39374d8f9e177a9182423c74d246808e68228f6dd6b6cf109894a255f8ce4505c15

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
936KB

MD5
c44491911d5cfcc1dc31ac019c2714aa

SHA1
635e1be851baee85fb17cb2781bc6d9ee6a94f8b

SHA256
4fb5476bfc11cb3da1feffa767cc7abb70040bd0b11c0e26a7e4d2bdc2d5e049

SHA512
e4649b1878060833939f6762df5a95275f4b5c4b7108eab2100140a2a5fbd39374d8f9e177a9182423c74d246808e68228f6dd6b6cf109894a255f8ce4505c15

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
936KB

MD5
c44491911d5cfcc1dc31ac019c2714aa

SHA1
635e1be851baee85fb17cb2781bc6d9ee6a94f8b

SHA256
4fb5476bfc11cb3da1feffa767cc7abb70040bd0b11c0e26a7e4d2bdc2d5e049

SHA512
e4649b1878060833939f6762df5a95275f4b5c4b7108eab2100140a2a5fbd39374d8f9e177a9182423c74d246808e68228f6dd6b6cf109894a255f8ce4505c15

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
936KB

MD5
c44491911d5cfcc1dc31ac019c2714aa

SHA1
635e1be851baee85fb17cb2781bc6d9ee6a94f8b

SHA256
4fb5476bfc11cb3da1feffa767cc7abb70040bd0b11c0e26a7e4d2bdc2d5e049

SHA512
e4649b1878060833939f6762df5a95275f4b5c4b7108eab2100140a2a5fbd39374d8f9e177a9182423c74d246808e68228f6dd6b6cf109894a255f8ce4505c15

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
936KB

MD5
c44491911d5cfcc1dc31ac019c2714aa

SHA1
635e1be851baee85fb17cb2781bc6d9ee6a94f8b

SHA256
4fb5476bfc11cb3da1feffa767cc7abb70040bd0b11c0e26a7e4d2bdc2d5e049

SHA512
e4649b1878060833939f6762df5a95275f4b5c4b7108eab2100140a2a5fbd39374d8f9e177a9182423c74d246808e68228f6dd6b6cf109894a255f8ce4505c15

Download Submit
\Users\Admin\AppData\Roaming\oos.exe
Filesize
936KB

MD5
c44491911d5cfcc1dc31ac019c2714aa

SHA1
635e1be851baee85fb17cb2781bc6d9ee6a94f8b

SHA256
4fb5476bfc11cb3da1feffa767cc7abb70040bd0b11c0e26a7e4d2bdc2d5e049

SHA512
e4649b1878060833939f6762df5a95275f4b5c4b7108eab2100140a2a5fbd39374d8f9e177a9182423c74d246808e68228f6dd6b6cf109894a255f8ce4505c15

Download Submit
\Users\Admin\AppData\Roaming\oos.exe
Filesize
936KB

MD5
c44491911d5cfcc1dc31ac019c2714aa

SHA1
635e1be851baee85fb17cb2781bc6d9ee6a94f8b

SHA256
4fb5476bfc11cb3da1feffa767cc7abb70040bd0b11c0e26a7e4d2bdc2d5e049

SHA512
e4649b1878060833939f6762df5a95275f4b5c4b7108eab2100140a2a5fbd39374d8f9e177a9182423c74d246808e68228f6dd6b6cf109894a255f8ce4505c15

Download Submit
memory/544-58-0x0000000007E90000-0x0000000007F42000-memory.dmp

Filesize
712KB

Download
memory/544-54-0x0000000001000000-0x00000000010F0000-memory.dmp

Filesize
960KB

Download
memory/544-59-0x0000000005D50000-0x0000000005DCA000-memory.dmp

Filesize
488KB

Download
memory/544-57-0x0000000000900000-0x0000000000916000-memory.dmp

Filesize
88KB

Download
memory/544-56-0x0000000005240000-0x0000000005324000-memory.dmp

Filesize
912KB

Download
memory/544-55-0x0000000075A91000-0x0000000075A93000-memory.dmp

Filesize
8KB

Download
memory/768-106-0x000000000043168C-mapping.dmp

Download
memory/768-110-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/768-111-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/768-112-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/916-78-0x0000000000000000-mapping.dmp

Download
memory/1064-88-0x00000000011C0000-0x00000000012B0000-memory.dmp

Filesize
960KB

Download
memory/1064-90-0x00000000049F0000-0x0000000004AD4000-memory.dmp

Filesize
912KB

Download
memory/1064-86-0x0000000000000000-mapping.dmp

Download
memory/1780-82-0x0000000000000000-mapping.dmp

Download
memory/1956-79-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1956-76-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1956-73-0x000000000043168C-mapping.dmp

Download
memory/1956-72-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1956-70-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1956-77-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1956-68-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1956-67-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1956-66-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1956-65-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1956-63-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1956-61-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1956-60-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download

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