remcos | fccf5521a09be0f003c6415ee7c87cd98cd109511ef7f79990e4386fcca0ae25

General

Target

fd0e549414dc04399f330542472c54b1.exe
Size

1.1MB
MD5

fd0e549414dc04399f330542472c54b1
SHA1

4480c47022f9318f8745a7c9ed276df235303c3a
SHA256

fccf5521a09be0f003c6415ee7c87cd98cd109511ef7f79990e4386fcca0ae25
SHA512

e42ba3f00ffc01327ae17b0661fefd84ea54a1b160997f24b90b62ce9341e4adbddc5d879bf56e13ff35083c60a209ffe7e539d5fc0215dcf197f66cb8a0e69d
SSDEEP

24576:IX+kYOD14qz/3ohrxSco/oQVQ64Wbuf3oIauxPpLnSlF:KYOD14SQQ0fPo7u7nkF

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

1520 oos.exe
1964 oos.exe
Loads dropped DLL 2 IoCs

Processes:

cmd.exe

pid process

972 cmd.exe
972 cmd.exe

pid	process
1520	oos.exe
1964	oos.exe

pid	process
972	cmd.exe
972	cmd.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

oos.exefd0e549414dc04399f330542472c54b1.exe

description	ioc	process
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\	fd0e549414dc04399f330542472c54b1.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\""	fd0e549414dc04399f330542472c54b1.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	fd0e549414dc04399f330542472c54b1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	fd0e549414dc04399f330542472c54b1.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

fd0e549414dc04399f330542472c54b1.exeoos.exe

description	pid	process	target process
PID 1488 set thread context of 1524	1488	fd0e549414dc04399f330542472c54b1.exe	fd0e549414dc04399f330542472c54b1.exe
PID 1520 set thread context of 1964	1520	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

1964 oos.exe

pid	process
1964	oos.exe

Suspicious use of WriteProcessMemory 38 IoCs

Processes:

fd0e549414dc04399f330542472c54b1.exefd0e549414dc04399f330542472c54b1.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 1488 wrote to memory of 1524	1488	fd0e549414dc04399f330542472c54b1.exe	fd0e549414dc04399f330542472c54b1.exe
PID 1488 wrote to memory of 1524	1488	fd0e549414dc04399f330542472c54b1.exe	fd0e549414dc04399f330542472c54b1.exe
PID 1488 wrote to memory of 1524	1488	fd0e549414dc04399f330542472c54b1.exe	fd0e549414dc04399f330542472c54b1.exe
PID 1488 wrote to memory of 1524	1488	fd0e549414dc04399f330542472c54b1.exe	fd0e549414dc04399f330542472c54b1.exe
PID 1488 wrote to memory of 1524	1488	fd0e549414dc04399f330542472c54b1.exe	fd0e549414dc04399f330542472c54b1.exe
PID 1488 wrote to memory of 1524	1488	fd0e549414dc04399f330542472c54b1.exe	fd0e549414dc04399f330542472c54b1.exe
PID 1488 wrote to memory of 1524	1488	fd0e549414dc04399f330542472c54b1.exe	fd0e549414dc04399f330542472c54b1.exe
PID 1488 wrote to memory of 1524	1488	fd0e549414dc04399f330542472c54b1.exe	fd0e549414dc04399f330542472c54b1.exe
PID 1488 wrote to memory of 1524	1488	fd0e549414dc04399f330542472c54b1.exe	fd0e549414dc04399f330542472c54b1.exe
PID 1488 wrote to memory of 1524	1488	fd0e549414dc04399f330542472c54b1.exe	fd0e549414dc04399f330542472c54b1.exe
PID 1488 wrote to memory of 1524	1488	fd0e549414dc04399f330542472c54b1.exe	fd0e549414dc04399f330542472c54b1.exe
PID 1488 wrote to memory of 1524	1488	fd0e549414dc04399f330542472c54b1.exe	fd0e549414dc04399f330542472c54b1.exe
PID 1488 wrote to memory of 1524	1488	fd0e549414dc04399f330542472c54b1.exe	fd0e549414dc04399f330542472c54b1.exe
PID 1524 wrote to memory of 900	1524	fd0e549414dc04399f330542472c54b1.exe	WScript.exe
PID 1524 wrote to memory of 900	1524	fd0e549414dc04399f330542472c54b1.exe	WScript.exe
PID 1524 wrote to memory of 900	1524	fd0e549414dc04399f330542472c54b1.exe	WScript.exe
PID 1524 wrote to memory of 900	1524	fd0e549414dc04399f330542472c54b1.exe	WScript.exe
PID 900 wrote to memory of 972	900	WScript.exe	cmd.exe
PID 900 wrote to memory of 972	900	WScript.exe	cmd.exe
PID 900 wrote to memory of 972	900	WScript.exe	cmd.exe
PID 900 wrote to memory of 972	900	WScript.exe	cmd.exe
PID 972 wrote to memory of 1520	972	cmd.exe	oos.exe
PID 972 wrote to memory of 1520	972	cmd.exe	oos.exe
PID 972 wrote to memory of 1520	972	cmd.exe	oos.exe
PID 972 wrote to memory of 1520	972	cmd.exe	oos.exe
PID 1520 wrote to memory of 1964	1520	oos.exe	oos.exe
PID 1520 wrote to memory of 1964	1520	oos.exe	oos.exe
PID 1520 wrote to memory of 1964	1520	oos.exe	oos.exe
PID 1520 wrote to memory of 1964	1520	oos.exe	oos.exe
PID 1520 wrote to memory of 1964	1520	oos.exe	oos.exe
PID 1520 wrote to memory of 1964	1520	oos.exe	oos.exe
PID 1520 wrote to memory of 1964	1520	oos.exe	oos.exe
PID 1520 wrote to memory of 1964	1520	oos.exe	oos.exe
PID 1520 wrote to memory of 1964	1520	oos.exe	oos.exe
PID 1520 wrote to memory of 1964	1520	oos.exe	oos.exe
PID 1520 wrote to memory of 1964	1520	oos.exe	oos.exe
PID 1520 wrote to memory of 1964	1520	oos.exe	oos.exe
PID 1520 wrote to memory of 1964	1520	oos.exe	oos.exe

C:\Users\Admin\AppData\Local\Temp\fd0e549414dc04399f330542472c54b1.exe
"C:\Users\Admin\AppData\Local\Temp\fd0e549414dc04399f330542472c54b1.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1488

C:\Users\Admin\AppData\Local\Temp\fd0e549414dc04399f330542472c54b1.exe
"C:\Users\Admin\AppData\Local\Temp\fd0e549414dc04399f330542472c54b1.exe"
2⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1524

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:900

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:972

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:1520

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:1964

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
1.1MB

MD5
fd0e549414dc04399f330542472c54b1

SHA1
4480c47022f9318f8745a7c9ed276df235303c3a

SHA256
fccf5521a09be0f003c6415ee7c87cd98cd109511ef7f79990e4386fcca0ae25

SHA512
e42ba3f00ffc01327ae17b0661fefd84ea54a1b160997f24b90b62ce9341e4adbddc5d879bf56e13ff35083c60a209ffe7e539d5fc0215dcf197f66cb8a0e69d

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1.1MB

MD5
fd0e549414dc04399f330542472c54b1

SHA1
4480c47022f9318f8745a7c9ed276df235303c3a

SHA256
fccf5521a09be0f003c6415ee7c87cd98cd109511ef7f79990e4386fcca0ae25

SHA512
e42ba3f00ffc01327ae17b0661fefd84ea54a1b160997f24b90b62ce9341e4adbddc5d879bf56e13ff35083c60a209ffe7e539d5fc0215dcf197f66cb8a0e69d

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1.1MB

MD5
fd0e549414dc04399f330542472c54b1

SHA1
4480c47022f9318f8745a7c9ed276df235303c3a

SHA256
fccf5521a09be0f003c6415ee7c87cd98cd109511ef7f79990e4386fcca0ae25

SHA512
e42ba3f00ffc01327ae17b0661fefd84ea54a1b160997f24b90b62ce9341e4adbddc5d879bf56e13ff35083c60a209ffe7e539d5fc0215dcf197f66cb8a0e69d

Download Submit
\Users\Admin\AppData\Roaming\oos.exe
Filesize
1.1MB

MD5
fd0e549414dc04399f330542472c54b1

SHA1
4480c47022f9318f8745a7c9ed276df235303c3a

SHA256
fccf5521a09be0f003c6415ee7c87cd98cd109511ef7f79990e4386fcca0ae25

SHA512
e42ba3f00ffc01327ae17b0661fefd84ea54a1b160997f24b90b62ce9341e4adbddc5d879bf56e13ff35083c60a209ffe7e539d5fc0215dcf197f66cb8a0e69d

Download Submit
\Users\Admin\AppData\Roaming\oos.exe
Filesize
1.1MB

MD5
fd0e549414dc04399f330542472c54b1

SHA1
4480c47022f9318f8745a7c9ed276df235303c3a

SHA256
fccf5521a09be0f003c6415ee7c87cd98cd109511ef7f79990e4386fcca0ae25

SHA512
e42ba3f00ffc01327ae17b0661fefd84ea54a1b160997f24b90b62ce9341e4adbddc5d879bf56e13ff35083c60a209ffe7e539d5fc0215dcf197f66cb8a0e69d

Download Submit
memory/900-77-0x0000000000000000-mapping.dmp

Download
memory/972-81-0x0000000000000000-mapping.dmp

Download
memory/1488-54-0x00000000012F0000-0x0000000001406000-memory.dmp

Filesize
1.1MB

Download
memory/1488-58-0x0000000005B90000-0x0000000005C0A000-memory.dmp

Filesize
488KB

Download
memory/1488-57-0x0000000008000000-0x00000000080D0000-memory.dmp

Filesize
832KB

Download
memory/1488-56-0x0000000000560000-0x0000000000576000-memory.dmp

Filesize
88KB

Download
memory/1488-55-0x0000000076681000-0x0000000076683000-memory.dmp

Filesize
8KB

Download
memory/1520-87-0x0000000000F40000-0x0000000001056000-memory.dmp

Filesize
1.1MB

Download
memory/1520-85-0x0000000000000000-mapping.dmp

Download
memory/1524-64-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1524-65-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1524-75-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1524-78-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1524-72-0x000000000043168C-mapping.dmp

Download
memory/1524-71-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1524-69-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1524-67-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1524-66-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1524-76-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1524-62-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1524-60-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1524-59-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1964-102-0x000000000043168C-mapping.dmp

Download
memory/1964-106-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1964-107-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1964-108-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads