remcos | d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

General

Target

706ac294f54bfd2a28d03f1c79165f9b.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 2 IoCs

Processes:

oos.exeoos.exe

pid process

988 oos.exe
1644 oos.exe
Loads dropped DLL 2 IoCs

Processes:

cmd.exe

pid process

540 cmd.exe
540 cmd.exe

pid	process
988	oos.exe
1644	oos.exe

pid	process
540	cmd.exe
540	cmd.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

oos.exe706ac294f54bfd2a28d03f1c79165f9b.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\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-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\	706ac294f54bfd2a28d03f1c79165f9b.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	706ac294f54bfd2a28d03f1c79165f9b.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	706ac294f54bfd2a28d03f1c79165f9b.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	706ac294f54bfd2a28d03f1c79165f9b.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\	oos.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

706ac294f54bfd2a28d03f1c79165f9b.exeoos.exe

description	pid	process	target process
PID 860 set thread context of 1384	860	706ac294f54bfd2a28d03f1c79165f9b.exe	706ac294f54bfd2a28d03f1c79165f9b.exe
PID 988 set thread context of 1644	988	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:

706ac294f54bfd2a28d03f1c79165f9b.exe

pid process

860 706ac294f54bfd2a28d03f1c79165f9b.exe
860 706ac294f54bfd2a28d03f1c79165f9b.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

706ac294f54bfd2a28d03f1c79165f9b.exe

description pid process

Token: SeDebugPrivilege 860 706ac294f54bfd2a28d03f1c79165f9b.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

oos.exe

pid process

1644 oos.exe

pid	process
860	706ac294f54bfd2a28d03f1c79165f9b.exe
860	706ac294f54bfd2a28d03f1c79165f9b.exe

description	pid	process
Token: SeDebugPrivilege	860	706ac294f54bfd2a28d03f1c79165f9b.exe

pid	process
1644	oos.exe

Suspicious use of WriteProcessMemory 46 IoCs

Processes:

706ac294f54bfd2a28d03f1c79165f9b.exe706ac294f54bfd2a28d03f1c79165f9b.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 860 wrote to memory of 552	860	706ac294f54bfd2a28d03f1c79165f9b.exe	706ac294f54bfd2a28d03f1c79165f9b.exe
PID 860 wrote to memory of 552	860	706ac294f54bfd2a28d03f1c79165f9b.exe	706ac294f54bfd2a28d03f1c79165f9b.exe
PID 860 wrote to memory of 552	860	706ac294f54bfd2a28d03f1c79165f9b.exe	706ac294f54bfd2a28d03f1c79165f9b.exe
PID 860 wrote to memory of 552	860	706ac294f54bfd2a28d03f1c79165f9b.exe	706ac294f54bfd2a28d03f1c79165f9b.exe
PID 860 wrote to memory of 588	860	706ac294f54bfd2a28d03f1c79165f9b.exe	706ac294f54bfd2a28d03f1c79165f9b.exe
PID 860 wrote to memory of 588	860	706ac294f54bfd2a28d03f1c79165f9b.exe	706ac294f54bfd2a28d03f1c79165f9b.exe
PID 860 wrote to memory of 588	860	706ac294f54bfd2a28d03f1c79165f9b.exe	706ac294f54bfd2a28d03f1c79165f9b.exe
PID 860 wrote to memory of 588	860	706ac294f54bfd2a28d03f1c79165f9b.exe	706ac294f54bfd2a28d03f1c79165f9b.exe
PID 860 wrote to memory of 1384	860	706ac294f54bfd2a28d03f1c79165f9b.exe	706ac294f54bfd2a28d03f1c79165f9b.exe
PID 860 wrote to memory of 1384	860	706ac294f54bfd2a28d03f1c79165f9b.exe	706ac294f54bfd2a28d03f1c79165f9b.exe
PID 860 wrote to memory of 1384	860	706ac294f54bfd2a28d03f1c79165f9b.exe	706ac294f54bfd2a28d03f1c79165f9b.exe
PID 860 wrote to memory of 1384	860	706ac294f54bfd2a28d03f1c79165f9b.exe	706ac294f54bfd2a28d03f1c79165f9b.exe
PID 860 wrote to memory of 1384	860	706ac294f54bfd2a28d03f1c79165f9b.exe	706ac294f54bfd2a28d03f1c79165f9b.exe
PID 860 wrote to memory of 1384	860	706ac294f54bfd2a28d03f1c79165f9b.exe	706ac294f54bfd2a28d03f1c79165f9b.exe
PID 860 wrote to memory of 1384	860	706ac294f54bfd2a28d03f1c79165f9b.exe	706ac294f54bfd2a28d03f1c79165f9b.exe
PID 860 wrote to memory of 1384	860	706ac294f54bfd2a28d03f1c79165f9b.exe	706ac294f54bfd2a28d03f1c79165f9b.exe
PID 860 wrote to memory of 1384	860	706ac294f54bfd2a28d03f1c79165f9b.exe	706ac294f54bfd2a28d03f1c79165f9b.exe
PID 860 wrote to memory of 1384	860	706ac294f54bfd2a28d03f1c79165f9b.exe	706ac294f54bfd2a28d03f1c79165f9b.exe
PID 860 wrote to memory of 1384	860	706ac294f54bfd2a28d03f1c79165f9b.exe	706ac294f54bfd2a28d03f1c79165f9b.exe
PID 860 wrote to memory of 1384	860	706ac294f54bfd2a28d03f1c79165f9b.exe	706ac294f54bfd2a28d03f1c79165f9b.exe
PID 860 wrote to memory of 1384	860	706ac294f54bfd2a28d03f1c79165f9b.exe	706ac294f54bfd2a28d03f1c79165f9b.exe
PID 1384 wrote to memory of 1940	1384	706ac294f54bfd2a28d03f1c79165f9b.exe	WScript.exe
PID 1384 wrote to memory of 1940	1384	706ac294f54bfd2a28d03f1c79165f9b.exe	WScript.exe
PID 1384 wrote to memory of 1940	1384	706ac294f54bfd2a28d03f1c79165f9b.exe	WScript.exe
PID 1384 wrote to memory of 1940	1384	706ac294f54bfd2a28d03f1c79165f9b.exe	WScript.exe
PID 1940 wrote to memory of 540	1940	WScript.exe	cmd.exe
PID 1940 wrote to memory of 540	1940	WScript.exe	cmd.exe
PID 1940 wrote to memory of 540	1940	WScript.exe	cmd.exe
PID 1940 wrote to memory of 540	1940	WScript.exe	cmd.exe
PID 540 wrote to memory of 988	540	cmd.exe	oos.exe
PID 540 wrote to memory of 988	540	cmd.exe	oos.exe
PID 540 wrote to memory of 988	540	cmd.exe	oos.exe
PID 540 wrote to memory of 988	540	cmd.exe	oos.exe
PID 988 wrote to memory of 1644	988	oos.exe	oos.exe
PID 988 wrote to memory of 1644	988	oos.exe	oos.exe
PID 988 wrote to memory of 1644	988	oos.exe	oos.exe
PID 988 wrote to memory of 1644	988	oos.exe	oos.exe
PID 988 wrote to memory of 1644	988	oos.exe	oos.exe
PID 988 wrote to memory of 1644	988	oos.exe	oos.exe
PID 988 wrote to memory of 1644	988	oos.exe	oos.exe
PID 988 wrote to memory of 1644	988	oos.exe	oos.exe
PID 988 wrote to memory of 1644	988	oos.exe	oos.exe
PID 988 wrote to memory of 1644	988	oos.exe	oos.exe
PID 988 wrote to memory of 1644	988	oos.exe	oos.exe
PID 988 wrote to memory of 1644	988	oos.exe	oos.exe
PID 988 wrote to memory of 1644	988	oos.exe	oos.exe

C:\Users\Admin\AppData\Local\Temp\706ac294f54bfd2a28d03f1c79165f9b.exe
"C:\Users\Admin\AppData\Local\Temp\706ac294f54bfd2a28d03f1c79165f9b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:860

C:\Users\Admin\AppData\Local\Temp\706ac294f54bfd2a28d03f1c79165f9b.exe
"C:\Users\Admin\AppData\Local\Temp\706ac294f54bfd2a28d03f1c79165f9b.exe"
2⤵
PID:552

C:\Users\Admin\AppData\Local\Temp\706ac294f54bfd2a28d03f1c79165f9b.exe
"C:\Users\Admin\AppData\Local\Temp\706ac294f54bfd2a28d03f1c79165f9b.exe"
2⤵
PID:588

C:\Users\Admin\AppData\Local\Temp\706ac294f54bfd2a28d03f1c79165f9b.exe
"C:\Users\Admin\AppData\Local\Temp\706ac294f54bfd2a28d03f1c79165f9b.exe"
2⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1384

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:1940

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:540

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:988

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:1644

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
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
\Users\Admin\AppData\Roaming\oos.exe
Filesize
934KB

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

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

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

Download Submit
memory/540-81-0x0000000000000000-mapping.dmp

Download
memory/860-58-0x0000000007CD0000-0x0000000007D80000-memory.dmp

Filesize
704KB

Download
memory/860-59-0x0000000007EC0000-0x0000000007F3A000-memory.dmp

Filesize
488KB

Download
memory/860-57-0x0000000001F30000-0x0000000001F46000-memory.dmp

Filesize
88KB

Download
memory/860-54-0x00000000000D0000-0x00000000001C0000-memory.dmp

Filesize
960KB

Download
memory/860-56-0x0000000004F70000-0x0000000005054000-memory.dmp

Filesize
912KB

Download
memory/860-55-0x0000000074DE1000-0x0000000074DE3000-memory.dmp

Filesize
8KB

Download
memory/988-87-0x0000000000860000-0x0000000000950000-memory.dmp

Filesize
960KB

Download
memory/988-85-0x0000000000000000-mapping.dmp

Download
memory/1384-63-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1384-66-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1384-60-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1384-78-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1384-73-0x000000000043168C-mapping.dmp

Download
memory/1384-72-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1384-70-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1384-68-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1384-67-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1384-76-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1384-65-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1384-61-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1644-102-0x000000000043168C-mapping.dmp

Download
memory/1644-106-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1644-107-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1644-108-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1940-77-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads